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FisherC1 Pneumatic Controllers and

TransmittersContents

Introduction 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Scope of Manual 2. . . . . . . . . . . . . . . . . . . . . . . . .Description 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Specifications 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .Educational Services 2. . . . . . . . . . . . . . . . . . . . . .

Installation 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Standard Installation 2. . . . . . . . . . . . . . . . . . . . . .Panel Mounting 6. . . . . . . . . . . . . . . . . . . . . . . . . .Wall Mounting 6. . . . . . . . . . . . . . . . . . . . . . . . . . . .Pipestand Mounting 6. . . . . . . . . . . . . . . . . . . . . . .

Actuator Mounting 6. . . . . . . . . . . . . . . . . . . . . . . .Pressure Connections 6. . . . . . . . . . . . . . . . . . . . .Supply Pressure 6. . . . . . . . . . . . . . . . . . . . . . . . .Process Pressure 8. . . . . . . . . . . . . . . . . . . . . . .

Vent Assembly 8. . . . . . . . . . . . . . . . . . . . . . . . . . .Controller Operation 9. . . . . . . . . . . . . . . . . . . . . . . .

ProportionalOnly Controllers 9. . . . . . . . . . . . . .Adjustments 9. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment: Set Point 9. . . . . . . . . . . . . . . . . .Adjustment: Proportional Band 9. . . . . . . . . .

Calibration: ProportionalOnly Controllers 10.Startup: ProportionalOnly Controllers 12. . . .

ProportionalPlusReset Controller 13. . . . . . . .Adjustments 13. . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment: Set Point 13. . . . . . . . . . . . . . . . .Adjustment: Proportional Band 13. . . . . . . . .Adjustment: Reset 13. . . . . . . . . . . . . . . . . . . .Adjustment: AntiReset Windup 14. . . . . . . .

Calibration 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Calibration: ProportionalPlusResetControllers 14. . . . . . . . . . . . . . . . . . . . . . . . . .Calibration: AntiReset Windup 16. . . . . . . .

Startup: ProportionalPlusResetControllers 16. . . . . . . . . . . . . . . . . . . . . . . . . .

Differential Gap Controllers 16. . . . . . . . . . . . . . .Adjustments 16. . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment: Set Point 16. . . . . . . . . . . . . . . . .Adjustment: Proportional Band 17. . . . . . . . .

Calibration: Differential Gap Controllers 17. . .Startup: Differential Gap Controllers 19. . . . . .Transmitter Operation 19. . . . . . . . . . . . . . . . . . . . .Adjustments 19. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment: Zero 19. . . . . . . . . . . . . . . . . . . . . . .Adjustment: Span 19. . . . . . . . . . . . . . . . . . . . . .

W92631

Figure 1. Fisher C1 Controller YokeMounted on ControlValve Actuator

Calibration: Transmitters 19. . . . . . . . . . . . . . . . . .Startup: Transmitters 20. . . . . . . . . . . . . . . . . . . . .

Principle of Operation 21. . . . . . . . . . . . . . . . . . . . .ProportionalOnly Controllers 21. . . . . . . . . . . . .ProportionalPlusReset Controllers 22. . . . . . .Controllers with AntiReset Windup 22. . . . . . . .Differential Gap Controllers 23. . . . . . . . . . . . . . .Transmitters 23. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replacing Gauges 24. . . . . . . . . . . . . . . . . . . . . . .Replacing Bourdon Tube 24. . . . . . . . . . . . . . . . .Replacing Bellows Sensing Element 26. . . . . . .Changing Proportional or Reset Valve 27. . . . . .Changing AntiReset Windup Differential

Relief Valve 27. . . . . . . . . . . . . . . . . . . . . . . . . .Changing Action 27. . . . . . . . . . . . . . . . . . . . . . . . .

Proportional

Only to a DifferentialGap Controller 27. . . . . . . . . . . . . . . . . . . . . . .Reverse to Direct Action 28. . . . . . . . . . . . . . . . .

Relay Replacement 29. . . . . . . . . . . . . . . . . . . . . .Changing Output Signal Range 30. . . . . . . . . . . .

Parts Ordering 31. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Instruction ManualD103292X012May 2010 C1 Controllers and Transmitters

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C1 Controllers and TransmittersInstruction Manual

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Contents (Continued)Parts Kits 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Parts List 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Common Parts 31. . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting Parts for Panel, Wall, Pipestandor Actuator Mounting 39. . . . . . . . . . . . . . . . . .

Introduction

Scope of Manual

This instruction manual provides installation,operating, maintenance, and parts information forthe Fisher C1 pressure controllers and transmitters

shown in figure 1. Refer to separate instructionmanuals for information regarding the control valve,actuator, and accessories.

Do not install, operate, or maintain C1 pressurecontrollers and transmitters without first being fullytrained and qualified in valve, actuator, andaccessory installation, operation, and maintenance.To avoid personal injury and property damage, it isimportant to carefully read, understand, and followall the contents of this manual, including all safetycautions and warnings. If you have any questionsabout these instructions, contact your EmersonProcess Management sales office before

proceeding.

Description

The C1 pneumatic pressure controllers andtransmitters use a bellows or Bourdon tube sensingelement to sense the gauge pressure, vacuum,compound pressure, or differential pressure of aliquid or gas. The controller or transmitter output is apneumatic pressure signal that can be used tooperate a final control element, indicating device, orrecording device.

Unless otherwise noted, all NACE references are toNACE MR01752002.

Specifications

Specifications for the C1 controllers and transmittersare listed in table 1. Table 2explains availableconfigurations and options.

Educational ServicesFor information on available courses for C1controllers and transmitters, as well as a variety ofother products, contact:

Emerson Process ManagementEducational Services, RegistrationP.O. Box 190; 301 S. 1st Ave.Marshalltown, IA 501582823Phone: 8003388158 orPhone: 6417543771FAX: 6417543431email: [email protected]

Installation

WARNING

To avoid personal injury or propertydamage resulting from the suddenrelease of pressure:

Always wear protective clothing,gloves, and eyewear when performingany installation operations.

Personal injury or propertydamage may result from fire orexplosion if natural gas is used as thesupply medium and appropriatepreventive measures are not taken.Preventive measures may include, but

are not limited to, one or more of thefollowing; remote venting of the unit,reevaluating the hazardous areaclassification, ensuring adequateventilation, and the removal of anyignition sources. For information onremote venting of this controller/transmitter, refer to page 8.

If installing into an existingapplication, also refer to the WARNINGat the beginning of the Maintenancesection in this instruction manual.

Check with your process or safety

engineer for any additional measuresthat must be taken to protect againstprocess media.

Standard InstallationThe instruments are normally mounted vertical withthe case/cover as shown in figure 1. If installing theinstrument in any other position, be sure that thevent opening shown in figure 2is facing downward.
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Table 1. Specifications

Available Configurations

See table 2

Input Signal

Type: Gauge pressure, vacuum, compound pressure, or differential pressureof a liquid or gasLimits:See table 3or 4

Output Signal

ProportionalOnly or ProportionalPlusResetControllers and Transmitters: 0.2 to 1.0 bar (3 to 15 psig) or 0.4 to 2.0 bar (6 to 30 psig) pneumaticpressure signal

Differential Gap Controllers: 0 and 1.4 bar (0 and 20 psig) or 0 and 2.4 bar (0 and 35 psig) pneumaticpressure signalAction:Control action is field reversible between direct (increasing sensed pressure producesincreasing output signal) and reverse(increasing sensed pressure produces decreasingoutput signal).

Supply Pressure Requirements(1)

See table 5

Supply Pressure Medium

Air or natural gas

Air Quality: Supply pressure must be clean, dryair that meets the requirements of ISA Standard7.0.01. A maximum 40 micrometer particle size inthe air system is acceptable. Further filtrationdown to 5 micrometer particle size isrecommended. Lubricant content is not to exceed1 ppm weight (w/w) or volume (v/v) basis.Condensation in the air supply should beminimized

Natural Gas: Natural gas must be clean, dry,oilfree, and noncorrosive. H2S content should

not exceed 20 ppm.

SteadyState Air Consumption(2,3)

0.2 to 1.0 bar (3 to 15 psig):0.08 normal m3/hour(3 scfh)0.4 to 2.0 bar (6 to 30 psig): 0.12 normal m3/hour(4.5 scfh)

Supply and Output Connections

1/4 NPT internal

Common Signal Pressure Conversions

See table 6

Proportional Band Adjustment

For ProportionalOnly Controllers:Full outputpressure change adjustable from 2% to 100%of the sensing element range for 0.2 to 1.0 bar (3to 15 psig) or 4% to 100% of the sensingelement range for 0.4 to 2.0 bar (6 to 30 psig)

For ProportionalPlusReset Controllers: Fulloutput pressure change adjustable from 3% to100% of the sensing element range for 0.2 to 1.0

bar (3 to 15 psig), or 6% to 100% of thesensing element range for 0.4 to 2.0 bar (6 to 30psig)

Differential Gap Adjustment

For Differential Gap Controllers:Full output pressure change adjustable from15% to 100% of sensing element range

Reset Adjustment

For ProportionalPlusReset Controllers:Adjustable from 0.01 to 74 minutes per repeat(100 to 0.01 repeats per minute)

Zero Adjustment (Transmitters Only)Continuously adjustable to position span of lessthan 100% anywhere within the sensing elementrange

Span Adjustment (Transmitters Only)

Full output pressure change adjustable from 6 to100% of sensing element range

Performance

Repeatability:0.5% of sensing element rangeDeadband (Except Differential GapControllers)(4):0.1% of sensing element range

Typical Frequency Response at 100%Proportional BandOutput to Actuator:0.7 Hz and 110 degree phaseshift with 1850 cm3(113 inches3) volume,actuator at midstrokeOutput to Positioner Bellows:9 Hz and 130degree phase shift with 0.2 to 1.0 bar (3 to 15psig) output to 33 cm3(2 inches3) bellows

continued

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Table 1. Specifications (continued)

Ambient Operating Temperature Limits(1)

Standard Construction:40 to 71C (40 to

160F) High Temperature Construction:18 to104C (0 to 220F)

Antireset windup (differential pressure relief) andprocess pressure gauge options are onlyavailable in the standard construction

If the process temperature is outside the ambientoperating range of the controller, the length of thecapillary tube run from the sensor point to thecontroller process input may be adjusted toprotect the controller from the processtemperature

Typical Ambient Temperature OperatingInfluence

Proportional Control only:

3.0% of output span for each 28C (50F)change in temperature between 40 and 71C(40 and 160F) for a controller set at 100%proportional band

ProportionalPlusReset Control:

2.0% of output span for each 28C (50F)change in temperature between 40 and 71C(40 and 160F) for a controller set at 100%

proportional band

Transmitters only:

3.0% of output span for each 28C (50F)change in temperature between 40 and 71C(

40 and 160F) for a transmitter set at 100%span

Hazardous Area Classification

Complies with the requirements of ATEX Group IICategory 2 Gas and Dust

Refer to figure 25for location of ATEX marking

Approximate Weight

8.2 kg (18 pounds)

Options

Case pressure tested to 0.14 bar (2 psig)

Declaration of SEP

Fisher Controls International LLC declares thisproduct to be in compliance with Article 3paragraph 3 of the Pressure Equipment Directive(PED) 97 / 23 / EC. It was designed andmanufactured in accordance with SoundEngineering Practice (SEP) and cannot bear theCE marking related to PED compliance.

However, the productmaybear the CE markingto indicate compliance with other applicable

European Community Directives.

1. The pressure/temperature limits in this document and any applicable standard or code limitation should not be exceeded.2. Normal m3/hr: normal cubic meters per hour (m3/hr, 0C and 1.01325 bar, absolute). Scfh: standard cubic feet per hour (ft3/hr, 60F and 14.7 psig).3. To convert from air flow rate to natural gas flow rate multiply by 1.29.4. An adjustable differential gap (differential gap controllers) is equivalent to an adjustable deadband.

Table 2. Available Configurations

TYPE NUMBER

DESCRIPTION Bourdon Tube SensingElement (Gauge Pressure Only)

Bellows Sensing Element

Gauge Pressure Differential Pressure

Proportionalonly controller

C1P C1B

C1D

Proportionalplusreset controllerWithout antireset windup

With antireset windup

Differential gap controller

Transmitter C1D

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Table 3. Bourdon Tube Pressure Range and Materials

PRESSURE RANGES(1,2)MAXIMUM ALLOWABLE STATIC PRESSURE LIMITS(3)

MATERIAL(5)Standard With Optional Travel Stop(4)

Bar Psig Bar Psig Bar Psig

0 to 2.00 to 4.00 to 7.0

0 to 300 to 600 to 100

2.04.07.0

3060

100

3.36.611

4896

160

316 stainless steel

0 to 140 to 200 to 400 to 70

0 to 2000 to 3000 to 6000 to 1000

14204070

200300600

1000

19295083

280420720

1200

0 to 1000 to 2000 to 350

0 to 15000 to 30000 to 5000

100200350

150030005000

115230380

165033005500

0 to 5500 to 700

0 to 80000 to 10.000

550700

800010,000

550700

800010,000

1. If the process can trip to a pressure outside of the operating range of the sensing element, a commercially available device, such as an overpressure protector, may be used to protectagainst pressure surges and pulsations.2. Range marked on Bourdon tube may be in kPa (1 bar = 100 kPa)3. Bourdon tube may be pressurized to limit shown without permanent zero shift.4. With travel stop set at 110% of the range.5. Bourdon tubes are also available in NACE compliant material. Contact your Emerson Process Management sales office for additional information.

Table 4. Bellows Pressure Ranges and Materials

PRESSURE RANGES(1)MAXIMUM ALLOWABLE STATIC

PRESSURE LIMITS(2)

BrassConstruction

Stainless SteelConstruction

Bar Psig Bar Psig

Gauge Pressure

Vacuum0 to 150 mbar (0 to 60 inch wc)0 to 340 mbar (0 to 10 inch Hg)0 to 1.0 bar (0 to 30 inch Hg)

1.42.82.8

204040

6.9

100

Compound Pressure75 mbar vac. to 75 mbar (30 inch wc vac. to 30 inch wc)500 mbar vac. to 500 mbar (15 inch Hg vac. to 7.5 psig)1.0 bar vac. to 1.0 bar (30 inch Hg vac. to 15 psig)

1.42.82.8

204040

6.96.9

100100

Positive pressure

0 to 150 mbar (0 to 60 inch wc)

0 to 250 mbar(3)(0 to 100 inch wc)0 to 350 mbar(4)(0 to 140 inch wc)0 to 0.35 bar (0 to 5 psig)0 to 0.5 bar (0 to 7.5 psig)

1.4

1.42.82.82.8

20

20404040

0 to 0.7 bar (0 to 10 psig)0 to 1.0 bar (0 to 15 psig)0 to 1.4 bar (0 to 20 psig)

0 to 2.0 bar (0 to 30 psig)

2.82.82.8

2.8

404040

40

6.9

6.9

100

100

Differential Pressure(5)

0 to 300 mbar (0 to 80 inch wc)0 to 0.7 bar (0 to 10 psi)0 to 1.4 bar (0 to 20 psi)

0 to 2.0 bar (0 to 30 psi)

1.42.82.8

204040

6.9

100

1. If the process can trip to a pressure outside of the operating range of the sensing element, a commercially available device, such as an overpressure protector, may be used to protect againstpressure surges and pulsations.2. Bellows may be pressured to limit shown without permanent zero shift.3. Transmitter only.4. Except transmitter.5. The overrange limit for these sensing elements is a differential pressure equal to the maximum allowable static pressure limit.

Table 5. Supply Pressure Requirements

Output Signal RangeNormal Operating Supply

Pressure(1)Maximum Allowable Supply Pressure To

Prevent Internal Part Damage

Bar0.2 to 1.0 or 0 and 1.4 (differential gap) 1.4 2.8

0.4 to 2.0 or 0 and 2.4 (differential gap) 2.4 2.8

Psig3 to 15 or 0 and 20 (differential gap) 20 40

6 to 30 or 0 and 35 (differential gap) 35 40

1. If this pressure is exceeded, control may be impaired.

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2 INCH(NOMINAL)PIPE

VENT ASSEMBLY(KEY 28)

FOUR HOLESFOR WALLMOUNTING

CUTOUT FORPANEL MOUNTING

MOUNTINGHOLES

PANEL MOUNTING WALL MOUNTING

BACK VIEWPIPESTAND MOUNTING

mm(INCH)

NOTES:

1. ALL CONNECTIONS ARE 1/4 NPT INTERNAL.

HIGHPRESSURE CONNECTION FOR DIFFERENTIALPRESSURE UNITS.2

3 LOWPRESSURE CONNECTION FOR DIFFERENTIALPRESSURE UNITS.E1052

101.6(4.00)

14.3 (0.56) R

244.3(9.62)

215.9(8.50)

218.9(8.62)

142.7(5.62)

69.1(2.72)

23.1(0.91)

65.8(2.59)

63.5(2.50)

63.5(2.50)

180.8(7.12)

8.7(11/32)

KNOCKOUT KNOCKOUT

Figure 2. Panel, Wall, and Pipestand Mounting

Supply pressure must be clean, dry air that meetsthe requirements of ISA Standard 7.0.01. Amaximum 40 micrometer particle size in the air

system is acceptable. Further filtration down to 5micrometer particle size is recommended. Lubricantcontent is not to exceed 1 ppm weight (w/w) orvolume (v/v) basis. Condensation in the air supplyshould be minimized. Alternatively, natural gas maybe used as the supply pressure medium. Gas mustbe clean, dry, oilfree, and noncorrosive. H2Scontent should not exceed 20 ppm.

Use a suitable supply pressure regulator to reducethe supply pressure source to the normal operating

supply pressure shown in table 5. Connect supplypressure to the SUPPLY connection at the back ofthe case.

WARNING

To avoid personal injury or propertydamage resulting from the suddenrelease of process pressure, use ahigh pressure regulator system whenoperating the controller or transmitterfrom a high pressure source.

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line, adequate ventilation, andnecessary safety measures should beused to prevent the accumulation offlammable or hazardous gas. However,a remote vent pipe alone cannot berelied upon to remove all flammableand hazardous gas. Vent line pipingshould comply with local and regionalcodes, and should be be as short aspossible with adequate inside diameterand few bends to reduce casepressure buildup.

CAUTION

When installing a remote vent pipe,take care not to overtighten the pipe in

the vent connection. Excessive torquewill damage the threads in theconnection.

The vent assembly (key 28, figure 2) or the end of aremote vent pipe must be protected against theentrance of all foreign matter that could plug thevent. Use 13 mm (1/2inch) pipe for the remote ventpipe, if one is required. Check the vent periodicallyto be certain it has not become plugged.

Controller Operation

Proportional

Only ControllersThis section describes the adjustments andprocedures for calibration and startup. Adjustmentlocations are shown in figure 4unless otherwisespecified. All adjustments must be made with thecover open. When the adjustments and calibrationprocedures are complete, close and latch the cover.

To better understand the adjustments and overalloperation of the controller, refer to the Principle ofOperation section in this manual forproportionalonly controllers. Refer also to theschematic diagram in figure 13.

Adjustments

Adjustment: Set Point

Adjust the pressure setting knob by turning the knobclockwise to increase the set point andcounterclockwise to decrease the set point. Notethat the dial setting and actual process pressure mayvary significantly, especially with a wide proportionalband setting.

GE33946A

SUPPLY PRESSURE

REGULATOR

SUPPLY PRESSUREREGULATOR

TYPICAL ROTARY ACTUATOR

TYPICAL SLIDING STEM ACTUATOR

GE33947A

Figure 3. Actuator Mounting

Adjustment: Proportional Band

To adjust the proportional band, rotate theproportional band adjustment knob to the desiredvalue.

The proportional band adjustment determines theamount of change in controlled pressure required tocause the control valve to stroke fully. It may beadjusted from 2 to 100 percent for 0.2 to 1.0 bar (3to 15 psig) or 4 to 100 percent for 0.4 to 2.0 bar (6 to30 psig)of the nominal sensing element pressurerating.

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PROPORTIONAL BAND

ADJUSTMENT KNOB

PRESSURE SETTING KNOB(KEY 58)

PRESSURE SETTINGDIAL (KEY 6)

FLAPPER (KEY 40)

NOZZLE (KEY 54)

CALIBRATION ADJUSTER (KEY 36)

ADJUSTER SCREWS (KEY 48)GE28280BE1059

Figure 4. ProportionalOnly Controller Adjustment Locations

Calibration: ProportionalOnlyControllersUnless otherwise indicated, key number locationsare shown in figure 4.

Provide a process pressure source capable ofsimulating the process pressure range of thecontroller. If an output pressure gauge is notprovided, install a suitable pressure gauge forcalibration purposes.

Connect a pressure source to the supply pressureregulator and be sure the regulator is delivering thecorrect supply pressure to the controller. Thecontroller must be connected open loop (Open loop:The controller output pressure changes must bedead ended into a pressure gauge). The followingprocedures use a 0.2 to 1.0 bar (3 to 15 psig) outputpressure range as an example. For a 0.4 to 2.0 bar(6 to 30 psig) output range, adjust the values asappropriate.

1. Complete the above connections and provide aprocess pressure equal to the sensing elementrange.

2. Rotate the proportional band adjustment knob,shown in figure 4, to 1.5 (15 percent proportionalband).

3. Verify that the calibration adjuster screws(key 48) are at midposition in the calibrationadjuster (key 36) slots.

IF OUTPUT IS:

ABOVE8 TO 10 PSIG(0.6 TO 0.7 BAR)

BELOW8 TO 10 PSIG(0.6 TO 0.7 BAR)

MOVE ADJUSTERLEFT

MOVE ADJUSTERRIGHT

FLAPPER

NOZZLE

NOTE:

3 TO 15 PSIG (0.2 TO 1.0 BAR) OUTPUT SHOWN.

FOR 6 TO 30 PSIG (0.4 TO 2.0 BAR) OUTPUT, ADJUST

VALUES AS APPROPRIATE.A61551 / IL

Figure 5. ReverseActing Controller Span Adjustment ProportionalOnly Controllers

Depending upon the controller action, perform oneor the other of the following procedures.

For reverseacting controllers:

4. Apply an input pressure equal to the sensingelement upper range value.

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Adjustment: AntiReset Windup

The externally mounted differential relief valve canbe mounted to relieve on increasing or decreasingoutput pressure.

Calibration

Calibration: ProportionalPlusReset Controllers

Unless otherwise indicated, key number locationsare shown in figure 7.

Before starting this procedure:

Provide a process pressure source capable ofsimulating the process pressure range of thecontroller.

If an output pressure gauge is not provided,install a suitable pressure gauge for calibrationpurposes. The controller must be connected openloop (Open loop: The controller output pressurechanges must be dead ended into a pressuregauge).

Note

C1P and C1B controllers withantireset windup are supplied withtwo Orings (key 81), an antiresetwindup cover (key 80), and two

machine screws (key 82). Use theseparts in the next step.

1. For C1P and C1B controllers with antiresetwindup record the direction of the arrow on theantireset windup assembly (key 190, in figure 22).Remove the assembly and install the two Orings(key 81), and cover (key 80) supplied with thecontroller. Secure the cover with the two machinescrews (key 82) provided.

2. Connect regulated supply pressure to thecontroller. Do not exceed the normal operatingpressure in table 5.

3. Rotate the reset knob to CLOSED (slowestsetting).

4. Rotate the proportional band adjustment knobto 1.5 (15 percent proportional band).

5. Verify that the calibration adjuster screws(key 48) are at midposition in the calibrationadjuster (key 36) slots.

Depending upon the controller action, perform oneor the other of the following procedures.

IF OUTPUT IS:



MOVE ADJUSTERLEFT

MOVE ADJUSTERRIGHT

FLAPPER

NOZZLE

NOTE:




Figure 8. ReverseActing Controller Span AdjustmentProportionalPlusReset Controllers

For reverseacting controllers:


7. Rotate the pressure setting knob to the maximumvalue.

8. Adjust the nozzle (key 54) until the controlleroutput pressure is between 0.6 and 0.7 bar (8

and 10 psig).

9. Apply an input pressure equal to the sensingelement lower range value.

10. Rotate the pressure setting knob to the

minimum value.

Note

When performing the span adjustmentin step 11, do not watch the outputgauge while changing the calibrationadjuster. The change in output is not agood indication of the change in span.While moving the calibration adjuster,the output pressure may change in theopposite direction than expected. Forexample, while moving the calibrationadjuster to increase span, the outputpressure may decrease. This shouldbe disregarded since even though theoutput pressure decreases, the span isincreasing.

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Proper controller response dependson nozzletoflapper alignment.

When performing span adjustments,carefully loosen both calibration

adjuster screws while holding thecalibration adjuster in place. Thenmove the calibration adjuster slightlyin the required direction by hand orusing a screwdriver. Verify propernozzletoflapper alignment and holdthe calibration adjuster in place whiletightening both adjustment screws.

11. If the output pressure is not between 0.6 and 0.7bar (8 and 10 psig), adjust the controller span byloosening the two adjusting screws (key 48) and

moving the calibration adjuster (key 36) a smalldistance as indicated in figure 8.

12. Repeat steps 6through 11until no furtheradjustment is necessary.

13. For C1P and C1B controllers with antiresetwindup, remove the two machine screws, antiresetwindup cover, and two Orings installed in step 1ofthis procedure. Install the antireset windup

assembly (key 190) with the arrow pointing in thedirection recorded in step 1.

14. Proceed to the Startup procedures for

proportionalplusreset controllers.

For direct

acting controllers:

6. Apply an input pressure equal to the sensingelement lower range value.

7. Rotate the pressure setting knob to the minimumvalue.

8. Adjust the nozzle (key 54) until the controlleroutput pressure is between 0.6 and 0.7 bar (8and 10 psig).


10. Rotate the pressure setting knob to the

maximum value.

Note

When performing the span adjustmentin step 11, do not watch the outputgauge while changing the calibrationadjuster. The change in output is not agood indication of the change in span.While moving the calibration adjuster,

IF OUTPUT IS:



MOVE ADJUSTERLEFT

MOVE ADJUSTERRIGHT

FLAPPER

NOZZLE

NOTE:




Figure 9. DirectActing Controller Span AdjustmentProportionalPlusReset Controllers

the output pressure may change in theopposite direction than expected. Forexample, while moving the calibrationadjuster to increase span, the outputpressure may decrease. This shouldbe disregarded since even though theoutput pressure decreases, the span isincreasing.

Proper controller response dependson nozzletoflapper alignment.

When performing span adjustments,carefully loosen both calibrationadjuster screws while holding thecalibration adjuster in place. Thenmove the calibration adjuster slightlyin the required direction by hand orusing a screwdriver. Verify propernozzletoflapper alignment and holdthe calibration adjuster in place whiletightening both adjustment screws.

11. If the output pressure is not between 0.6 and 0.7bar (8 and 10 psig), adjust the controller span byloosening the two adjusting screws (key 48) and

moving the calibration adjuster (key 36) a smalldistance as indicated in figure 9.

12. Repeat steps 6through 11until no furtheradjustment is necessary.

13. For C1P and C1B controllers with antiresetwindup remove the two machine screws, antiresetwindup cover, and two Orings installed in step 1ofthis procedure. Install the antireset windupassembly (key 190) with the arrow pointing in thedirection recorded in step 1.

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A22023 / IL

PROPORTIONALBAND

KNO

B

SETTING

DIFFERENTIAL GAP (PERCENT OF ELEMENT RANGE)

Figure 10. Differential Gap Adjustment for Differential GapControllers

pressure with rising process pressure (direct

actingcontrollers) or with falling process pressure(reverseacting controllers).

Adjustment: Proportional Band

The proportional band adjustment shown in figure 4determines the width of the differential gap. Thewidth of the gap is the difference between theprocess pressures at which the controller output willswitch from zero to full supply pressure, or from fullsupply pressure to zero. The relationship betweenthe proportional band dial setting and the differentialgap is shown in figure 10.

Calibration: Differential Gap ControllersThe output of each controller is checked at thefactory before the unit is shipped. Before placing thecontroller in control of a process loop, check to verifythat the controller is calibrated correctly for theapplication. The controller must be connected openloop (Open loop: The controller output pressurechanges must be dead ended into a pressuregauge).

1. Temporarily convert the differential gap controllerto proportionalonly controller by disconnecting theproportional tubing (key 25, figure 16) from the

mounting base. Reinstall the tubing into the otherconnection in the mounting base. Remove theproportional band assembly and invert it as shown infigure 16. Do not invert the reversing block (key 37,figure 16).

2. Temporarily invert the proportional bandassembly (refer to figure 18):

a. Turn the proportional band assembly (key 73)to 10.

b. Unscrew the spring adjustor (key 65),removing the bias spring (key 70) and washers(key 62) with it.

c. Unclip the lock spring (key 72). Remove theindicator scale (key 69) and proportional bandadjustment knob (key 73).

d. Remove the gain adjustment bar (key 63). Flipit over so it attaches to the opposite side of thecantilever spring (key 8) as shown in figure 16and screw it back down.

e. Flip over the indicator scale (key 69); install itand the proportional band adjustment knob(key 73) as a unit. Snap in the lock spring(key 72).

f. Tighten down the spring adjustor (key 65) withthe bias spring (key 70) and washers (key 62)until it stops against the gain adjustment bar(key 63).

g. Turn the proportional band adjustment knob tothe 10 setting. If it cannot be turned to the 10setting, loosen the spring adjustor (key 65).

3. Calibrate using the calibration procedure forproportionalonly controllers found on page 10ofthis manual.

4. When calibration is complete, return the tubing(key 25) and the proportional band assembly to theiroriginal locations and continue on with step 5of thisprocedure.

Note

After reinstalling the tubing (key 25)and proportional band assembly aslight offset of the output pressure willbe noticed due to a combination ofswitching from the proportionalbellows to the reset bellows and the

repositioning of the cantilever spring.Performing step 6b below adjusts forthis offset.

5. Refer to figure 10to determine the proportionalband dial setting required for the desired differentialgap.

For example, assume that a 0 to 100 psig sensingelement is being used and the controller is to switchfrom zero to full supply pressure at a process

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PRESSURE SETTINGDIAL (KEY 6)

ADJUSTER SCREWS (KEY 48)

CALIBRATION ADJUSTER (KEY 36)

FLAPPER (KEY 40)

NOZZLE (KEY 54)SPAN ADJUSTMENT KNOB

ZERO ADJUSTMENT KNOB(KEY 58)

GE34729BE1061

Figure 11. Transmitter Adjustment Locations

pressure of 80 psig with rising process pressure andfrom full supply pressure to zero at 20 psig withfalling pressure. (This is for a directactingcontroller.) The differential gap is:

5.5 bar 1.3 bar

6.9 bar 100% 60%

80 psig 20 psig

100 psig 100% 60%( )

From figure 10, the proportional band dial settingshould be approximately 4.5; rotate the proportionalband adjustment knob to 4.5.

6. Setting the process pressure

For a DirectActing Controller:

a. Rotate the pressure setting knob to thepressure at which the controller output is toswitch to the upper switching point (zero to fullsupply pressure) with rising process pressure. Inthe above example, this pressure is 5.5 bar (80psig).

b. Increase pressure to the sensing elementwhile monitoring the output pressure gauge. Thecontroller output pressure should switch fromzero to full supply pressure when the upper

switching point is reached with rising inputpressure.

Note

If the upper switching point is notcorrect, adjust the nozzle to correctthe error. Repeat step 6b until theinput pressure and upper switchingpoint are at the desired setting.

c. With falling input pressure, the output shouldswitch from full supply pressure back to zerowhen the lower switching point is reached.

Reverseacting controllers produce the oppositeresponse.

7. Vary the process pressure and observe theswitching points. Widen or narrow the differentialgap by rotating the proportional band adjustmentknob, then repeat the above steps.

If the output is within the limits stated, refer to thestartup procedures in this section. If the outputpressure cannot be adjusted within the limits stated,refer to the maintenance procedures.

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Startup: Differential Gap ControllersCalibrate the controller prior to this procedure.

1. Be sure that the supply pressure regulator isdelivering the proper supply pressure to thecontroller.

2. Adjust the proportional band setting for the properdifferential gap (see figure 10).

3. If the controller is used in conjunction with acontrol valve, slowly open the upstream anddownstream manual shutoff valves, and close thebypass valves.

4. To change the differential gap, perform steps 1through 5of the calibration for differential gapcontrollers procedure.

Transmitter OperationThis section describes the adjustments andprocedures for calibration and startup. Refer tofigure 11for the adjustment locations. Alladjustments must be made with the cover open.When the adjustments and calibration proceduresare complete, close and latch the cover.

To better understand the adjustments and overalloperation of the transmitter, refer to the Principle ofOperation section in this manual for transmitters.Refer also to the schematic diagram in figure 13.

Adjustments

Adjustment: ZeroThe pressure setting dial is marked ZERO

ADJUSTMENT PRESSURE SETTING. Zero is in thecenter of the dial, and the pressure values increaseto the right and left of the center as shown in figure11. To set the zero, rotate the pointer around thepressure setting dial. Rotate the pointer clockwise toincrease or counterclockwise to decrease the outputdepending on transmitter action and desired setting.

For directacting transmitters, zero adjustmentdetermines the process pressure at which thetransmitter output signal will be at its lower rangelimit.

The dial (key 6) graduations are approximateindications of the transmitter zero setting. Whenmaking adjustments, do not rely solely on the dialsetting. Monitor the process pressure and outputpressure to be sure the desired settings are attained.

Adjustment: SpanThe span adjustment is graduated from 0 to 10. Asetting of 10 represents a span setting of 100percent of the process sensing element range. The

transmitter achieves the highest accuracy when thespan is 100 percent.

The transmitter span adjustment shown in figure 11is the same as the controller proportional bandadjustment.

Calibration: Transmitters

The output of each transmitter is checked at thefactory before the unit is shipped. The transmitterprovides an output signal that is proportional to thepressure applied to the sensing element. The outputpressure has no direct effect on the process

pressure.The transmitter is calibrated at the factory andshould not need additional adjustment. Use thefollowing calibration procedures when the sensingelement has been changed or other maintenanceprocedures have altered the calibration of thetransmitter. The following procedures use a 0.2 to1.0 bar (3 to 15 psig) output pressure range as anexample. For other output pressure ranges [such as0.4 to 2.0 bar (6 to 30 psig)] adjust the values tomatch the application.

Provide a process pressure source capable ofsimulating the process pressure range of the

transmitter. If an output pressure gauge is notprovided, install a suitable pressure gauge forcalibration purposes. Connect a pressure source tothe supply pressure regulator and be sure theregulator is delivering the correct supply pressure tothe transmitter.

Note

For stability, some transmitterapplications will require additionalvolume than just the gauge. Provide aminimum volume of approximately 25

cm3

(1.5 in3

) or greater if stability is aproblem.

Unless otherwise indicated, key number locationsare shown in figure 11.

1. Complete the above connections and provide aprocess pressure equal to the sensing elementrange.

2. Rotate the span adjustment knob to themaximum setting on the dial (100 percent span).

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CONSTANT SUPPLYPRESSURE

EXHAUST

EXHAUST END OF RELAY

BOURDON TUBE

FIXEDPIVOT

BEAM ANDFLAPPER

NOZZLE

VENT

INLET END OFRELAY VALVE

SMALL DIAPHRAGM

LARGE DIAPHRAGM

TO FINALCONTROLELEMENT

SENSEDPRESSURE

RESTRICTION

PROPORTIONAL-PLUS-RESETCONTROLLER

PROPORTIONAL-ONLYCONTROLLER

GE23696GE34724A

E1062

PROPORTIONALBELLOWS

RESET BELLOWS

SENSED PRESSURE OUTPUT PRESSURE NOZZLE PRESSURE RESET PRESSURE

CANTILEVERSPRING

RESETVALVE

RESETBELLOWS

PRESSURE SETTING DIAL

PRESSURE SETTING KNOB

PROPORTIONALBELLOWS

PROPORTIONALBAND ADJUSTMENTKNOB

Figure 13. Schematic of ReverseActing ProportionalOnly and ProportionalPlusReset Controllers

3. If the transmitter is used in conjunction with acontrol valve, slowly open the upstream anddownstream manual shutoff valves, and close thebypass valves.

Principle of OperationThe following sections describe the operation of acontroller or transmitter using a Bourdon tubesensing element. The operation is the same for aninstrument using a bellows sensing element (key 71,figure 24) except that movement of the beam iscaused by expansion or contraction of the bellows ordifferential bellows.

Proportional

Only ControllersAs shown in figure 13, supply pressure enters therelay and bleeds through the fixed orifice beforeescaping through the nozzle. Nozzle pressure alsoregisters on the large relay diaphragm, and loadingpressure (controller output pressure) registers on thesmall relay diaphragm.

A change in the process pressure moves the beamand flapper with respect to the nozzle by eitherexpanding or contracting the Bourdon tube arc. An

increasing process pressure with direct action (ordecreasing pressure with reverse action) produces anozzleflapper restriction that increases the loadingon the large relay diaphragm and opens the relayvalve. Additional supply pressure flows through therelay chamber to increase the loading pressure onthe control valve actuator. A decreasing processpressure with direct action (or increasing pressurewith reverse action) produces a nozzleflapperopening that bleeds off pressure on the large relaydiaphragm and opens the relay valve to exhaustcontroller output pressure from the actuator.

This controller output pressure change feeds back tothe proportional bellows, countering the pressurechange in the nozzle and equalizes the relaydiaphragm pressure differential. The relay valvemaintains a new loading pressure according to thechange in sensed pressure.

If the proportional band adjustment is at itsmaximum setting (10), the cantilever spring in theproportional band assembly has a low spring rate,allowing more feedback motion to be transferredfrom the proportional bellows for a change in outputpressure. As the effective length of the cantilever isreduced, its spring rate increases, causing lessfeedback motion from proportional bellows. Settingthe cantilever spring to its maximum length results ina proportional band of 100%. The lower the

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ARROW DOWNRELIEVESON DECREASING OUTPUT

ARROW UPRELIEVESON INCREASING OUTPUT

(OUTPUT AT SUPPLYDURING SHUTDOWN)

(OUTPUT AT ZERODURING SHUTDOWN)

CONSTANT SUPPLYPRESSURE

TO FINALCONTROLELEMENT

EXHAUST

RESET BELLOWS

RESTRICTION

RESET VALVE

GE23697AGE34724A

E1063

SENSEDPRESSURE

PROPORTIONALBELLOWS

SENSED PRESSURE OUTPUT PRESSURE NOZZLE PRESSURE RESET PRESSURE

DIFFERENTIALRELIEF VALVE

CANTILEVERSPRING

PRESSURESETTING DIAL

PROPORTIONALBAND ADJUSTMENTKNOB

PRESSURESETTING KNOB

Figure 14. Schematic of ReverseActing ProportionalPlusReset Controller with AntiReset Windup

proportional band adjustment, the shorter theeffective length of the cantilever spring. The springrate of the cantilever spring increases as its lengthshortens, allowing less motion to be transferred fromthe bellows to the beam and flapper for a givenchange in output pressure.

Proportional

Plus

Reset ControllersAction of a proportionalplusreset controller issimilar to that of a proportionalonly controllerexcept that feedback from the controller outputpressure is piped to a reset bellows as well as to theproportional bellows as shown at the right infigure 13.

With an increasing controller output pressure,pressure in the reset bellows increases. Increases in

reset bellows pressure moves the beam and flappercloser to the nozzle, starting another increase ofpressure throughout the system. Pressure buildupcontinues until the controlled pressure is broughtback to the set point. The reset valve is adjustable tovary the amount of delay in the reset action. Closingthe reset valve increases the delay in reset action.

Controllers with AntiReset Windup

During a prolonged difference between set point andthe controlled variable, such as encountered withintermittent control applications (e.g., batchtemperature control or wide open monitors onpressure control), reset ramps the controller outputto either zero or full supply pressure; this condition isreset windup. When the controlled variable crossesthe set point, there will be a delay before the

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controller output responds to the change incontrolled variable. Antireset windup minimizes thisdelay and permits returning the controlled variable toset point more quickly with minimal overshoot.

As shown in figure 14a proportionalplusresetcontroller with antireset windup includes adifferential relief valve. The valve consists of twopressure chambers separated by a springloadeddiaphragm.

For the controller shown in figure 14, proportionalpressure registers rapidly on the spring side of therelief valve diaphragm as well as in the proportionalbellows, and reset pressure registers on theopposite side of the relief valve diaphragm. As longas controlled pressure changes are slow enough fornormal proportional and reset action, the relief valve

spring will keep the relief valve diaphragm fromopening. However, a large or rapid decrease incontroller pressure will cause the relay to exhaustloading pressure from the control device rapidly, andalso from the proportional system and spring side ofthe relief diaphragm. If this decrease on the springside of the diaphragm is greater than the relief valvespring setting, the diaphragm will move off the reliefvalve orifice and permit the proportional pressure onthe opposite side of the relief valve diaphragm tobleed rapidly into the reset bellows. The antiresetwindup action also can be reversed to relieve withan increasing proportional pressure.

Differential Gap Controllers

With a differential gap controller, feedback pressuredoes not counteract the change in flapper positionas it does in a proportionalonly controller. Instead,feedback pressure is piped to the bellows located onthe side of the beam and flapper opposite the nozzle(the proportional bellows in figure 13). Then, ascontroller output pressure increases, feedbackpressure moves the flapper closer to the nozzle toagain increase controller output pressure. Thisprocess continues rapidly until the controller outputpressure is at the upper range limit. The action of adifferential gap controller is so rapid that outputpressure changes from zero to maximum as soon asthe switching point is reached. The action is similarwith falling output pressure. Lower feedbackpressure lowers the bellows pressure, which movesthe flapper away from the nozzle. This againreduces the output pressure and continues until theoutput pressure is zero.

TransmittersAction of a pneumatic transmitter is similar to that ofa proportionalonly controller. Since the outputpressure of the transmitter has no effect on the

process pressure, transmitter output pressure is aproportional measure of the process pressure. Theproportional band adjustment determines the span ofthe transmitter, and the pressure setting mechanismdetermines the zero of the transmitter.

MaintenanceIf the installation includes a Fisher 67 filter regulator,periodically open the drain on the filter regulator todrain accumulated moisture. Also, push thespringout cleaning wire on the relay orifice. Check

the opening of the vent assembly (key 28, figure 2)or the opening of the remote vent pipe, if one isused. If necessary, clean the openings.

Parts are subject to normal wear and must beinspected and replaced as necessary. Thefrequency of inspection and parts replacementdepends upon the severity of the service conditions.

WARNING

The following maintenance proceduresrequire taking the controller out of

service. To avoid personal injury andproperty damage caused by therelease of pressure or process fluid,observe the following before startingmaintenance:

Always wear protective clothing,gloves, and eyewear.

Provide some temporary meansof control for the process beforetaking the controller out of service.

Provide a means of containing theprocess fluid before removing anymeasurement devices from theprocess.

Use lockout procedures to besure that the above measures stay ineffect while you work on theequipment.

Personal injury or propertydamage may result from fire orexplosion if natural gas is used as thesupply medium and appropriate

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preventative measures are not taken.Preventative measures may include,but are not limited to, one or more ofthe following; Remote venting of theunit, reevaluating the hazardous areaclassification, ensuring adequateventilation, and the removal of anyignition sources. For information onremote venting of this controller/transmitter, refer to page 8.

Check with your process or safetyengineer for any additional measuresthat must be taken to protect againstprocess media.

Replacing Gauges

Refer to figures 21and 22for key number locationsunless otherwise directed.

Three gauge configurations are available for C1units.

Output and supply pressure indications

Output and process pressure indications

Output, process, and supply pressureindications

One gauge type (key 2) is used for both output andsupply pressure indications when the gauges areinstalled inside the controller case. Key 2 features a1/8inch connecting stem that matches the threadedgauge boss extending from the relay base.

In some cases, a process pressure gauge (key 4)covers the position of the internal supply pressuregauge. The supply pressure gauge has beenremoved and replaced with a pipe plug (key 15). Thepressure control block (key 10) is different toaccommodate a different control tubing assembly(key 23) with a pressure connection (key 14) for aprocess pressure gauge. If a supply pressure gauge

is required, a gauge with a 1/4

inch connecting stem(key 3) must be mounted on the supply pressureregulator.

CAUTION

Before performing this procedure, besure the replacement gauges are the

correct range so they are not damagedby overpressure.

Note

Key 2 is used as both a supply gaugeand an output gauge on units withouta process pressure gauge. A quantityof 2 is required for these units. Onunits with a process pressure indicatorgauge (key 4), key 2 is used for theoutput gauge. A quantity of 1 isrequired for these units.

Use key 3 for supply pressureindication when a process pressuregauge is installed. Key 3 installs onthe supply pressure regulator.

1. Shut off the supply pressure and process lines tothe controller or transmitter.

2. Remove the gauge to be replaced:

Unscrew the output or supply gauge (key 2)from the relay base.

Unscrew the process pressure gauge (key 4)from the process connection (key 14).

Unscrew the supply gauge (key 3) from thesupply pressure regulator.

3. Coat the threads of the replacement gauge with asealant.

4. Screw the replacement gauge into the relay base,process connection, or supply pressure regulator.

5. Check for leaks by applying the correct supplypressure with the nozzle capped to produce fulloutput pressure.

Replacing Bourdon TubeRefer to figure 23for key number locations unlessotherwise directed.


2. Unscrew the machine screw (key 56) todisconnect the link (key 16) and bearing (key 31)from the beam (key 39). Be careful to avoid losingthe bearing (key 31). Washer(s) (key 62) for themachine screw (key 56) are at times furnished forinsertion at the beam (key 39) connection to ensurealignment of the connecting link (key 16).

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RELAY TUBING(KEY 24)

REVERSING BLOCK(KEY 37)

DIRECT ACTINGPOSITION

PROPORTIONAL TUBING(KEY 27)

RESET TUBING(KEY 27)

REVERSE ACTINGPOSITION


DIRECT ACTINGREVERSE ACTING

FLAPPER/SCREW(KEYS 40 AND 46)


RESET VALVE(KEY 256)

PROPORTIONAL BAND ASSY

PROPORTIONALBAND ASSY

GE34722A

E1065

FLAPPER/SCREW

(KEYS 40 AND 46)

RESET VALVE(KEY 256)

RESET TUBING(KEY 27)


PROPORTIONAL-PLUS-RESET CONTROLLER




DIRECT ACTING POSITION



REVERSEACTING POSITION


GE28263AE1064

PROPORTIONAL-ONLY CONTROLLER OR TRANSMITTER






BELLOWS(KEY 52)

BELLOWS(KEY 52)

BELLOWS

(KEY 52)

BELLOWS(KEY 52)

Figure 15. Reverse/Direct Acting Tubing Connections for Proportional Controllers or Transmitter

3. Disconnect the control tubing (key 23, figure 22).Unscrew the two screws (key 55) and washers

(key 45), and remove the Bourdon tube (key 5).4. Unscrew the machine screw (key 56), andremove the link and bearing (keys 16 and 31) fromthe Bourdon tube. Be careful to avoid losing thebearing.

5. Attach the link and bearing to the replacementBourdon tube.

6. Attach the Bourdon tube with two machinescrews and washers (keys 55 and 45).

7. Connect the link and bearing to the beam(key 39).

8. After connecting the link to the beam, make surethat the link is parallel to the sensing element (key 5)and the beam (key 39) so that it does not bindagainst the sensing element of the beam. Figure 17shows a properly aligned connecting link; theconnecting link is not in contact with the Bourdontube or or washers. When properly configured, theconnecting link moves freely when touched.Washers (key 62) are used as shims to setparallelism.

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REVERSE ACTINGPOSITION


PROPORTIONAL BAND ASSY


GE34724

AE1066


DIRECT ACTINGPOSITION


PROPORTIONAL BANDASSY

DIFFERENTIAL-GAP CONTROLLER






BELLOWS(KEY 52)

BELLOWS(KEY 52)

Figure 16. Reverse/Direct Acting Tubing Connection for Differential Gap Controller

9. Check to be sure that the beam is parallel withthe bottom of the case and that the link (key 16) is intension. If the beam is not parallel with the case,loosen the machine screws (key 55), reposition theBourdon tube to get the beam parallel, and retightenthe screws.

10. If a Bourdon tube with a different range wasinstalled, remove the machine screw and washer(keys 61 and 60) and dial (key 6). Install a new dial

having an adjustment range corresponding to therange of the Bourdon tube. If an optional processpressure gauge (key 4, figure 21) is being used,install a new gauge with the appropriatemeasurement capability.

11. Check all tubing connections for leaks and theBourdon tube machine screws, tighten asnecessary. Perform the appropriate calibrationprocedures.

Replacing Bellows Sensing ElementRefer to figure 24for key number locations unlessotherwise directed.


2. Disconnect the tubing from the mounting base(key 57) and calibration adjuster (key 36).Disconnect the tubing that connects the pressure

block (key 8, figure 21) to the bellows assembly(key 71), at the pressure block end.

3. Unscrew the four machine screws (key 41,figure 21or 22), and remove the pressure sensingsubassembly from the case.

4. Remove the bellows yoke machine screws andwashers (keys 98 and 99), and move the bellowsyoke to the right to permit access to the link screw.

5. Disconnect the link (key 71M) and bearing(key 71L) from the beam. Be careful to avoid losingthe bearing.

6. Loosen the nuts that secure the bellowsassembly (key 71), and remove this assembly fromthe bellows yoke (key 100).

7. For a gaugepressure sensing element (only onebellows in the assembly), install the proper bellowsspring (key 104) into the bellows assembly if theinput signal range is being changed.

8. Install the new bellows assembly into the bellows

yoke.9. Attach the link and bearing to the bellowsassembly. Position the bellows yoke (key 100) onthe mounting base (key 57), and attach the link andbearing to the beam. Start but do not tighten the fourmachine screws (key 98) with washers (key 99) thatattach the yoke to the mounting base. Slide the yokeup or down as necessary to position the beamhorizontally, as shown in figure 24. Tighten themachine screws.

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PROPORTIONAL BAND ADJUSTMENT KNOB(KEY 73)

LOCK SPRING(KEY 72)

CANTILEVER SPRING(KEY 8)

BIAS SPRING(KEY 70)

WASHER(KEY 64)

SPRING ADJUSTOR(KEY 65)

MACHINE SCREW(KEY 56)

INDICATOR SCALE(KEY 69)


GAIN ADJUSTMENT BAR(KEY 63)

GE34725A

E1067

Figure 18. Proportional Band Assembly


d. Remove the gain adjustment bar (key 63). Flipit over so it attaches to the opposite side of thecantilever spring (key 8), as shown in figure 16,and screw it back down.

e. Flip over the indicator scale (key 69); install itand the proportional band adjustment knob(key 73) as a unit. Snap in the lock spring(key 72).


g. Turn the proportional band adjustment knob tothe 10 setting. If it cannot be turned to the 10setting loosen the spring adjustor (key 63).

5. Check all connections for leaks with asoapandwater solution. Perform the appropriatecalibration procedure.

Reverse to Direct Action

Use the numbered steps below to change fromreverse action (increasing process pressureproduces decreasing output pressure) to directaction (increasing process pressure producesincreasing output pressure), or vice versa. Changingthe action is accomplished by reversing the positionsof the reversing block, proportional band assembly,and bellows tubing(s). Refer to figures 15, 16, 18,

and 19for key number locations unless otherwisedirected.

1. Isolate the controller or transmitter from process,control, and supply pressure. Vent any trappedpressure from the controller or transmitter beforeproceeding with this procedure.

2. As shown in figure 15, locate the new tubing,proportional band assembly, and reversing blockpositions for the desired action.

3. Locate the two bellows (key 52), the proportionalband assembly (see figure 15), and the reversingblock (key 37).

4. Disconnect the tubing (refer to figure 15):

a. For a proportionalonly controller or for atransmitter, disconnect the proportional tubing(key 25) from the mounting base and reconnectthem on the opposite side.

b. For a proportionalplusreset controller,disconnect the proportional tubing (key 27) andreset tubing (key 27) from the mounting base andreconnect them on the opposite side.

5. Invert the proportional band assembly (refer tofigure 18):

a. Turn the proportional band adjustment knob(key 73) to 10.

b. Unscrew the spring adjustor (key 65),removing the bias spring (key 70) and washers(key 64) with it.


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OUTER FLEXURE(KEY 68)


BEAM(KEY 39)

INNER FLEXURE(KEY 67)

CANTILEVER SPRING

(KEY 8)

GE34726BE1068


BELLOWS SPACER(KEY 34)

Figure 19. Beam/Cantilever Spring Assembly

d. Remove the gain adjustment bar (key 63). Flipit over so it attaches to the opposite side of thecantilever spring (key 8) as shown in figure 15and reattach.

e. Flip over the indicator scale (key 69, figure18); install it and the proportional ban knob (key73) as a unit. Snap in the lock spring (key 72).


g. Turn the proportional band adjustment knob tothe 10 setting. If it cannot be turned, loosen thespring adjustor (key 65).

6. Change the reversing block assembly (figure 15or 16, key 37):

a. Remove the sealing screw (key 49, figure 23or 24). Inspect the Oring (key 77 located in the

recessed area under the sealing screw head.Replace the Oring if necessary.

b. Remove the reversing block screw (key 50,figure 23or 24) and reversing block assembly(key 37). Inspect the Orings (key 77) located inthe recessed area under the reversing blockscrew head and between the reversing blockassembly and the calibration adjuster (key 36).Replace these Orings if necessary.

c. Position the reversing block assembly, with anOring, on the calibration adjuster (key 36) sothat the nozzle is on the opposite side of thebeam (key 39) from which it was removed.Position the reversing block hole in the calibrationadjuster. Install the reversing block screw (key50) with an Oring (key 77).

d. Install the sealing screw (key 49) with anOring in the hole previously covered by the

reversing block assembly.7. Check all connections for leaks with asoapandwater solution. Perform the appropriatecalibration procedures.

Relay ReplacementKey numbers used in this procedure are shown infigure 21or 22except where indicated.

1. Shut off the supply pressure and processpressure line(s) to the controller or transmitter.

2. Disconnect the tubing (key 24) from the relay.

3. Unscrew the output or supply pressure gauge(key 2).

4. To remove the relay assembly, unscrew twoPhillipshead machine screws (key 29, not shown)located behind the relay on the back of the case.

5. Remove the relay gasket (key 19, figure 21).

6. A new relay can be installed as a replacement. Ifa new relay is being installed, continue with the nextstep.

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7. Attach the replacement relay and new relaygasket with machine screws inserted through theback of the case. Reinstall the output or supplygauge.

8. Connect the tubing, and check all connections forleaks. Perform the appropriate calibrationprocedures.

Changing Output Signal RangeUse the following information and subsequentprocedures when changing the output signal rangeof the controller or transmitter. Use the followingprocedure:

For a controller or transmitter, use thisprocedure to change from a 0.2 to 1.0 bar (3 to 15psig) to a 0.4 to 2.0 bar (6 to 30 psig) output signalrange or vice versa.

For a differential gap controller, use thisprocedure to change from a 0 and 1.4 bar (0 and 20psig) to a 0 and 2.4 bar (0 and 35 psig) output signalrange or vice versa.

When changing the supply pressure source toa new range, refer to table 5for supply pressurerequirements for the output signal range selected.

Also, make appropriate changes to the nameplate ofthe controller or transmitter, reflecting the new range

selections. Refer to figure 23or 24for key numberlocations unless otherwise directed.


2. Disconnect the tubing from the mounting base(key 57) and calibration adjuster (key 36).

Disconnect the tubing that connects the pressureblock (key 10, figure 21or 22) to the Bourdon tubeor bellows assembly (key 5 or 52), at the pressureblock end.

3. Unscrew the machine screws (key 41, figure 21or 22), and remove the subassembly from the case.

4. If the controller or transmitter uses a Bourdontube sensing element disconnect the Bourdon tubefrom the beam (key 39) by removing the screw(key 56). Be careful to avoid losing the bearing(key 31). Unscrew the machine screws (key 55)and remove the washers and Bourdon tube (keys 45and 5).

5. Unscrew the bellows screws (key 53) from eachend of the mounting base (key 57).

ORING(KEY 77)

A62811 / IL

Figure 20. Bellows Screw Detail

Note

The bellows screws (key 53) have anOring (key 77, figure 20) installedbeneath the bellows screw head.Remove the Oring and obtain areplacement when reassembling thebellows.

6. Unscrew the spring adjustor (key 65). Unclip thelock spring (key 72, figure 18) and remove theindicator scale (key 69) and the proportional bandadjustment knob (key 73).

7. Compress the bellows (key 52) so that the end ofthe bellows, beam (key 39), and cantilever spring(key 8) can be removed from the mounting base

(key 57).8. Unscrew the bellows (key 52) from thebellows/cantilever assembly.

9. Remove the cantilever spring from the spacer(key 34).

a. Remove the beam machine screws (figure 19,step 4).

b. Remove the cantilever machine screws(figure 19, step 3).

c. Remove the inner flexure (figure 19, step 1)and install it on the new cantilever.

10. Install the new cantilever spring (key 8) andreconnect the beam (key 39) to the bellows spacer(key 34) in reverse sequence of steps 9a. and 9b.and reattach the bellows to the beam/cantileverassembly.

11. Compress the bellows and install them into themounting base (key 57). Align the cantilever springwith the gain adjustment bar (key 63). Install theindicator scale (key 69) and the proportional band

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Key Description Part Number

Note

Key 2 is used as both a supply gauge and anoutput gauge on units without a process

pressure gauge. A quantity of 2 is requiredfor these units. On units with a processpressure gauge (key 106), key 2 is used forthe output gauge. A quantity of 1 is requiredfor these units.

Use key 3 for supply pressure indicationwhen a process pressure gauge is installed.Key 3 installs on the supply pressureregulator.

2* Supply and Output Pressure Gauge, w/o process

pressure gauge (1/8inch connecting stem), (2 reqd)

Dual scale

Brass/Plastic

02.0 kg/cm2and 030 psig 11B8577X042

04.0 kg/cm2and 060 psig 11B8577X052

SST

02.0 kg/cm2and 030 psig 11B8583X032

0

4.0 kg/cm2and 0

60 psig 11B8583X052

Triple scale

Brass/Plastic

02.0 bar, 00.2 MPa, and 030 psig 11B8577X012


SST

02.0 kg/cm2and 030 psig 11B8583X012

04.0 kg/cm2and 060 psig 11B8583X022

2* Output Pressure Gauge,w/process pressure

gauge (1/8inch connecting stem), Brass/Plastic

Triple scale



3* Supply Pressure Gauge,w/process pressuregauge (1/4inch connecting stem), Brass/Plastic

Triple scale



Note

Controllers with bellows sensing elementuse only the 2.0 bar, 0 to 0.2 MPa, and 0 to 0to 30 psig triple scale brass and stainlesssteel process pressure gauges. Differentialpressure controllers do not use a processpressure gauge.

4* Process Pressure Indicator Gauge(use only when specified)

Triple scale

Stainless steel02.0 bar, 00.2 MPa, and 030 psig 11B8584X022

020 bar, 02.0 MPa, and 0300 psig 11B8584X012

069 bar, 06.9 MPa, and 01000 psig 11B8584X032

High Temp, silicone 1N873804142

5* Bourdon Tube See following table

6 Dial, aluminum

7 Screw, nylon (transmitters only)


8* Cantilever Spring, S30200

315 psi range GE31702X012

630 psi range GE31701X012

9 Nameplate, aluminum

10 Control Pressure Block

For gauge pressure instruments

w/o process pressure gauge

CF8M FMS 20B58 for standard, NACE and oxygen service

w/process gauge

SST

11 Plug, S31600 (not shown)

used with gauge pressure only

1 reqd for standard/NACE

2 reqd for oxygen service

12 Machine Screw, steel pl (4 reqd)

13 Lockwasher, steel pl/zn pl (4 reqd)

14 Pressure Connection, S31600

Use w/process gauge

15 Pipe Plug, steel pl(not shown)

Use w/process gauge, not used w/Bourdon tube protector

16* Connecting Link(1), Bourdon tube instruments only

Std., 188 SST 1L379641012

16 Connecting Link, Bourdon tube w/optional travel stop,

188 SST

17 Lockwasher, steel pl (2 reqd)

Use w/optional Bourdon tube travel stop



19* Relay Gasket(1)

Std Temp, chloroprene 1C897403012

Hi Temp, silicone 1N873804142

20* ORing(1), nitrile 1C376206992

21* Gasket(1),chloroprene, (not shown) 1C328603012

22 Mounting Screw for reset restriction valve

1/420 UNC, steel pl (not shown)

23* Control Tubing Assembly, 304 SST

For Bourdon tube instruments

w/o process pressure gauge

NACE 1H3011000A2

Oxygen Service 1H3011X0012

w/process pressure gauge 1J2530000A2

23 Control Tubing Assembly, SST/vinyl

used with NACE compliant Bourdon tube

24* Relay Tubing Assembly, 304 SST GE33948X012

25* Compensator Tubing, 304 SST GE28421X012

26* Reset Tubing, 304 SST GE30128X012

*Recommended spare parts1. This part is included in the Controller Repair Kit.

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RELAY ASSEMBLY

SUBASSEMBLY(KEY NOS. SHOWNIN FIGURE 23OR 24)NOTE:

KEYS 11, 21, AND 29 ARE NOT SHOWN

GE34729BGE31719A

E1069

OPTIONAL PROCESS PRESSURE INDICATION

TRANSMITTER

SPRINGOUT CLEANING WIRE

Figure 21. Typical Reverse Acting Fisher C1 Assembly(Refer to figure25for the Front View of the Case & Cover Assembly)

Key 5* Bourdon Tube

PRESSURE RANGE MATERIAL(1)

kPa Psig Stainless Steel

02000200040004000700070001400

01400

030030060060

010001000200

0200

32B1243X01232B1243X212(2)

32B1243X02232B1243X172(2)

32B1243X03232B1243X202(2)

32B1243X042

32B1243X162(2)

020000200004000

040000700007000

010,000020,000

030003000600

060001000010000150003000

32B1244X05232B1244X152(2)

32B1244X062

32B1244X182(2)

32B1244X07232B1244X192(2)

32B1245X08232B1245X092

0

35,000055,000070,000

0

500008000

010,000

32B1245X10232B1245X11232B1245X122

1. Bourdon tubes are also available in NACE compliant material. Contact your Emerson Process Management sales office for additional information.2. For oxygen service.

*Recommended spare parts

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PROPORTIONAL-ONLY CONTROLLER

NOTE:

KEYS 11, 21, 29 ARE NOT SHOWN

GE28280B

RELAY ASSEMBLY

SUBASSEMBLY (KEY NOS.SHOWN IN FIGURE 23OR 24)


Figure21. Typical Reverse Acting Fisher C1 Assembly (continued)(Refer to figure25for the Front View of the Case & Cover Assembly)


27* Compensator Tubing, 304 SST (2 reqd) GE29222X012

28 Vent Assy

29 Machine Screw(2), 188 SST (not shown) (2 reqd)

30 NPT Adaptor, aluminum

31* Link bearing(1), S41600

Bourdon tube instruments only (2 reqd) 1L379546202

32 Rotary Spring, S30400

33 Bellows Stud, brass (not shown)

34 Spacer,

35 Pressure Set Arm, G10080 carbon steel, zinc pl

36 Calibration Adjuster

37 Reversing Block(1), Z33520 zinc die casting

38 Sleeve(1), POM (polyoxymethylene)

39 Beam, G10080 carbon steel, zinc pl40 Flapper(1), S30100 SST



42 Flexure Strip, S30200

43 Flexure Strip Washer, G10200 carbon steel (2 reqd)

44 Washer, 188 SST (2 reqd)

45 Washer,steel pl (2 reqd)

46 Machine Screw(1), steel pl


48 Machine Screw, 188 SST (2 reqd)

49 Sealing Screw(1), SST

50 Reversing Block Screw(1), SST

51 Cap Screw, 188 SST (8 reqd)

52* Reversing Bellows Assy, SST (2 reqd) 14A5725X022

53 Bellows Screw, 188 SST (2 reqd)

54* Nozzle(1),SST 1U639135132


56 Machine Screw, 18

8 SST (4 reqd)

57 Mounting Base, aluminum

*Recommended spare parts1. This part is included in the Controller Repair Kit.2. This part is included in the Relay Replacement Kit.

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NOTE:

KEYS 11, 21, 22, 29 ARE NOT SHOWN

GE28281BE1071

RELAY ASSEMBLY

SUBASSEMBLY (KEY NOS.SHOWN IN FIGURE 23OR 24)

PROPORTIONAL-PLUS-RESET CONTROLLERWITHOUT ANTI-RESET WINDUP


Figure 22. Typical Reverse Acting Fisher C1ProportionalPlusReset Assembly(Refer to figure25for the Front View of the Case & Cover Assembly)


58 Knob, PPS (polyphenylene sulfide)

59 Knob Spring, steel/zinc pl

60 Washer, G10100 carbon steel, zinc pl

61 Machine Screw, steel pl

62 Washer(1),brass/zinc pl (2 reqd)

63 Gain Adj Bar, A03600

64 Washer, 188 SST (2 reqd)

65 Spring Adjustor, 188 SST

66 Travel Stop Assembly, SST


67* Inner Flexure, S30200 GE26663X012

68* Outer Flexure, S30200 GE26664X012

69 Indicator Scale, aluminum

70 Bias Spring, S30200


71* Gauge Pressure Bellows (input)(3)

Brass

0150 mbar (060 inches wc) positive, 0150 mbar

(660 inches wc) vacuum, and 75075 mbar

(30030 inches wc) compound 1L3780000A2

0250 mbar (0100 inches wc) positive 1L3788000A2

00.35 mbar (05 psig) positive and for

0350 mbar (010 inches Hg) vacuum 1L3781000A2

00.5 bar (07.5 psig) positive 1L3789000A2

00.7 bar (010 psig) positive 1L3782000A2

01.0 bar (015 psig) positive, 01.0 bar

(030 inches Hg) vacuum, and 5000500 mbar

(15

0

7.5 psig) compound 1L3783000A201.4 bar (020 psig) positive 1L3784000A2

02.0 bar (030 psig) positive and 1.001.0 bar

(30015 psig) compound 1L3785000A2

Stainless steel,

01.0 bar (015 psig) positive, 01.0 bar

(030 inches Hg) vacuum, and 5000500 mbar

(1507.5 psig) compound 1L3786000A2

02.0 bar (030 psig) positive, 1.001.0 bar

(30015 psig) compound 1L3787000A2


1.This part is included in the Controller Repair Kit.3. If ordering the bellows (key 71) to change the range of a gauge pressurecontroller, also order the appropriate bellows spring (key 80). Also orderkeys 101, 102, and 103 if you do not have them.

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GE31718A

E1072

NOTES:

ARROW DOWNRELIEVES ON DECREASING OUTPUT (OUTPUT @ SUPPLY DURING SHUTDOWN)

ARROW UPRELIEVES ON INCREASING OUTPUT (OUTPUT @ ZERO DURING SHUTDOWN)

KEYS 80, 81, AND 82 ARE NOT SHOWN

PROPORTIONAL-PLUS-RESET CONTROLLER WITH DIFFERENTIALRELIEF VALVE ASSEMBLY FOR ANTI-RESET WINDUP

1

1

2

2


RELAY ASSEMBLY

Figure22. Typical Reverse Acting Fisher C1ProportionalPlusReset Assembly (continued)(Refer to figure25for the Front View of the Case & Cover Assembly)


71* DifferentialPressure Bellows (input)

Brass

0200 mbar (080 inches wc) 2L3790000A2

00.7 bar (010 psi) 2L3791000A2

01.4 bar (020 psi) 2L3792000A2

Stainless steel,

02.0 bar (030 psi) 2L3793000A2

71K Machine Screw(4), steel pl

bellows sensing instruments only (2 reqd) 1A331928982

71L* Bearing(4)

bellows sensing instruments only (2 reqd) 1L379546202

71M* Link(4)bellows sensing instruments only 1L379641012

72* Lock Spring, 304L SST GE32298X012

73 Proportional Band Adjustment Knob, steel/PPS74 Machine Screw(1), 188 SST (2 reqd)

75* Gasket(1)

Std Temp, chloroprene (2 reqd) 1D397003012

High Temp, silicone (2 reqd) 1N873604142

76* Nozzle ORing(1),

Std Temp, nitrile 1E222606992

High Temp, fluorocarbon 1N838706382


Note

A total of 5 Orings (key 77) are used. 1Oring is used under the sealing screw (key49), 1 Oring is used under the reversingblock screw (key 50), 1 Oring is usedbetween the reversing block assy (key 52)and the calibration adjuster (key 36), and 1Oring is used in the recessed area under thehead of each of the bellows screws (key 53).

77* ORing,

Std Temp, nitrile (5 reqd) 1D687506992

High Temp, fluorocarbon (5 reqd) 1N430406382

Note

Keys 78 through 82 are used forProportionalPlusReset controllers only.

78 Tubing Assembly, SST

79 Tubing Assembly, SST

80 AntiReset Windup Cover (not shown)

81* ORing (not shown) (2 reqd) 1C853806992


1. This part is included in the Controller Repair Kit.3. If ordering the bellows (key 71) to change the range of a gauge pressurecontroller, also order the appropriate bellows spring (key 104). Also orderkeys 101, 102, and 103 if you do not have them.4. This part is part of the bellows assembly, key 71.

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SECTION B-B

SECTION A-A

COMPRESSION PLUGS

ATEX MARKINGCASE ASSEMBLYCOVER ASSEMBLY

2X ROLL PIN

A

A

B

B

CHANGE ACTION LABEL(INSIDE COVER)

2 PSIG LABEL USE WITH 2 PSIG CASE AND COVER ASSEMBLY(INSIDE COVER)

GE28278A

E1075

Figure 25. Front View of Case and Cover Assembly

Mounting Parts for Panel, Wall,Pipestand, or Fisher Actuator Mounting(figures 2and 3)

Key Description

Note

Contact your Emerson Process Management sales

office for C1 mounting FS number.

213 Mounting Plate, steel

For yoke mounting on

470, 472, 513, 656, 657 and 667

For yoke mounting on 480

Vertical

For yoke mounting on 1051 and 1052

Size 40, positions 1 and 3 w/switch and

Size 60, position 1 w/switch

All others

Key Description

213 Mounting Plate, steel (continued)

For yoke mounting on 1061 Size 30,

positions 1 and 3 w/switch and position 1 w/o

switch, Size 40, position 1 w/switch and

Sizes 80 and 100, position 3 w/o switch

All others

For pipe stand mounting

215 Machine Screw, steel pl (specify quantity reqd)

5/16 UNC X 1 inch

5/16 UNC X 11/2 inches

5/16 UNC X 2 inches

216 Hex Nut, steel pl (specify quantity reqd)

For filter regulator mounting on

1051, 1052 and 1061

All other types and mountings

220 Mounting Bracket, steel pl (not shown)

For casing mounting and casingmounted filter

regulator on 1051 and 1052

221 Lockwasher, steel pl (specify quantity reqd)

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Key Description

222 Cap Screw, steel pl (specify quantity reqd)

5/16 UNC X 3/4 inch

5/16 UNC X 1 inch





3/8 UNF X 11/8 inches

223 Cap Screw, steel pl

1051 and 1052 with either case or

yoke mounted regulator and 1061

with yoke mounted regulator (2 reqd)

228 Spacer Spool, steel (specify quantity reqd)

470, 472, 480, 513, 656, 657, 667,

pipe stand 1051, 1052 and 1061

229 Cap Screw, steel pl (not shown) (specify quantity reqd)

1051 and 1052 casing

mounted

controller

238 Mounting Plate, steel

For yokemounted filter regulator

1051, 1052 and 1062 sizes 40 and 60

1061 size 30

240 Cap Screw, steel

For yokemounted filter regulator on

1051 and 1052 sizes 40 and

60 (2 reqd)

241 Spacer Spool, steel

For yoke mounted filter regulators on

1051 and 1052 sizes 40 and 60 (2 reqd)

Key Description

242 Spacer Spool, steel (not shown)

For yoke mounting on

1051 and 1052 size 40 (2 reqd)

1061 sizes 30, 80 and 100 (2 reqd)

243 Street Elbow, pl galvanized malleable iron (not shown)For mounting on 470, 472, 480, 513, 656,

657, 667, panel, pipe stand, 1051, 1052 and 1061

w/nipplemounted filter regulator

244 Pipe Nipple, pl galvanized steel (not shown)

For mounting on 470, 472, 480, 513, 656,

657, panel, pipe stand, 1051, 1052 and 1061

w/nipplemounted filter regulator

250 Clamp, Steel

For pipe stand mounting (2 reqd)

251 Bracket Assembly, steel

For panel or wall mounting (2 reqd)

252 Cap Screw, steel plFor panel or wall mounting (4 reqd)

Note

Specify quantity of fittings.

Connector, Brass

1/4 NPT X 1/4 O.D. tubing


Elbow, Brass



Emerson Process ManagementMarshalltown, Iowa 50158 USASorocaba 18087 Brazil

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, theyare not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use orapplicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve thedesigns or specifications of such products at any time without notice. Neither Emerson, Emerson Process Management, nor any of their affiliatedentities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance ofany product remains solely with the purchaser and end user.

Fisher is a mark owned by one of the companies in the Emerson Process Management business section of Emerson Electric Co. Emerson ProcessManagement, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of theirrespective owners.

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