PR570 POWERITE II TRAINING

Dedicated to Success in ElectronicServicing for 50 Years

“POWERITE II”6 WAY SAFETY

ANALYZER

1. AC Receptacle Tester & Voltage Monitor

2. AC Variable Power Supply

3. Isolation Transformer

4. Output Current/Power Monitor

5. Output Circuit Breaker

6. Safety Leakage Tester

IndicatesIsolated Output

is Active

AC VOLTS

AC VOLTS

HOT TOSAFTEY GND

HOT TONEUTRAL

ISOLATEDOUTPUT

HOT TOEXTERNAL

EARTH GNDValid only when

connected toExternal Earth Gnd

CURRENT/POWER

CURRENT/POWER

TRIP RESET CURRENT

POWER

LEAKAGE

TRIP SET

HOTCHASSIS

Amps

Amps

uAmps

Watts

uAmps

VARIABLE ISOLATION TRANSFORMER &SAFETY ANALYZER

PR570

MIN MAXMAXMIN

ONOFF

ISOLATED OUTPUTVOLTAGE

TRIP SET

100 uAMP LEAKAGECAL CHECK

Set Output to 120VAC &Touch Safety Probe Here.

3 Amps At 117VAC Continous, 4 Amps Intermittent Use

TO EXTERNALEARTH GND

Refer ToPull Chart

Isolated OutputOn When Lit

AUTO-TOGGLE

AC Line Safety GndBoth Must Light

SAFETY PROBEINPUT

POWER

POWERITE II

WARNING:For EquipmentUnder TestOnly!

!

ISOLATED OUTPUT

Displays AC Receptacle& Isolated Output

AC Voltages

Adjusts ACV atIsolated Output

Measures Current or Power Delivered to

Isolated Output

Displays Current, Power, & Voltage at

Isolated Output

Measures Input ACV to Safety Ground

ResetsIsolated Output

Trip Current

Measures Variable ACV at Isolated Output

Isolated VariableAC Output

Select to ViewTrip Current

Measures ACLeakage

AdjustsIsolated Output

Trip Current Level

PR570Equipment

Familiarization

H ot

N eutra l E arthG round

AC outlet120VAC

AC Electrical Outlet

ElectricBox

Neutral

Hot (120V)Hot(120VAC)

EarthGround

Rod

B lack

W hite

G reen

AC Electric Box

AC VOLTS

AC VOLTS

HOT TOSAFTEY GND

HOT TONEUTRAL

ISOLATEDOUTPUT

HOT TOEXTERNAL

EARTH GNDValid only when

connected toExternal Earth Gnd

CURRENT/POWER

CURRENT/POWER

TRIP RESET CURRENT

POWER

LEAKAGE

TRIP SET

HOTCHASSIS

Amps

Amps

uAmps

Watts

uAmps

VARIABLE ISOLATION TRANSFORMER &SAFETY ANALYZER

PR570

MIN MAXMAXMIN

ONOFF

ISOLATED OUTPUTVOLTAGE

TRIP SET

100 uAMP LEAKAGECAL CHECK

Set Output to 120VAC &Touch Safety Probe Here.

3 Amps At 117VAC Continous, 4 Amps Intermittent Use

TO EXTERNALEARTH GND

Refer ToPull Chart

Isolated OutputOn When Lit

AUTO-TOGGLE

AC Line Safety GndBoth Must Light

SAFETY PROBEINPUT

POWER

POWERITE II

WARNING:For EquipmentUnder TestOnly!

!

ISOLATED OUTPUT

Hot To External Earth Ground

Earth Ground

AC VOLTS

AC VOLTS

HOT TOSAFTEY GND

HOT TONEUTRAL

ISOLATEDOUTPUT

HOT TOEXTERNAL

EARTH GNDValid only when

connected toExternal Earth Gnd

CURRENT/POWER

CURRENT/POWER

TRIP RESET CURRENT

POWER

LEAKAGE

TRIP SET

HOTCHASSIS

Amps

Amps

uAmps

Watts

uAmps

VARIABLE ISOLATION TRANSFORMER &SAFETY ANALYZER

PR570

MIN MAXMAXMIN

ONOFF

ISOLATED OUTPUTVOLTAGE

TRIP SET

100 uAMP LEAKAGECAL CHECK

Set Output to 120VAC &Touch Safety Probe Here.

3 Amps At 117VAC Continous, 4 Amps Intermittent Use

TO EXTERNALEARTH GND

Refer ToPull Chart

Isolated OutputOn When Lit

AUTO-TOGGLE

AC Line Safety GndBoth Must Light

SAFETY PROBEINPUT

POWER

POWERITE II

WARNING:For EquipmentUnder TestOnly!

!

ISOLATED OUTPUT

AC Receptacle Tests

H ot

N eutra l E arthG round

V ariac o r A uto transform er

A variac or autotransform er provides an AC outputvoltage variable from 0 to approxim ately 140 VAC.

A variac does not provide isolation.

A Variable AC Transformer

Variable AC Power Supply0-140 VAC

AC VOLTS

AC VOLTS

HOT TOSAFTEY GND

HOT TONEUTRAL

ISOLATEDOUTPUT

HOT TOEXTERNAL

EARTH GNDValid only when

connected toExternal Earth Gnd

CURRENT/POWER

CURRENT/POWER

TRIP RESET CURRENT

POWER

LEAKAGE

TRIP SET

HOTCHASSIS

Amps

Amps

uAmps

Watts

uAmps

VARIABLE ISOLATION TRANSFORMER &SAFETY ANALYZER

PR570

MIN MAXMAXMIN

ONOFF

ISOLATED OUTPUTVOLTAGE

TRIP SET

100 uAMP LEAKAGECAL CHECK

Set Output to 120VAC &Touch Safety Probe Here.

3 Amps At 117VAC Continous, 4 Amps Intermittent Use

TO EXTERNALEARTH GND

Refer ToPull Chart

Isolated OutputOn When Lit

AUTO-TOGGLE

AC Line Safety GndBoth Must Light

SAFETY PROBEINPUT

POWER

POWERITE II

WARNING:For EquipmentUnder TestOnly!

!

ISOLATED OUTPUT

Hot Ground

TestEquipment

V

67 VDC

Direct off-line DC supply with bridge rectifier results in a “HOT” chassis

“HOT” ground has direct path to electrical hot side of electrical outlet

Approximately 67 VDC between “HOT” ground and Earth ground

Connecting a ground from a test instrument to a “HOT” ground causes high current through the diode

• An isolation transformer electrically isolates the “HOT” side of the AC plug, eliminating the voltage difference and current that may result between ground references

TestEquipm ent

V

IsolationTransform er

120VACBetw eenC hassisG rounds

V

Defeating Isolation

The isolation transformer can be defeated if twohot chassis are connected at the same time.

Isolated Output On/Off Control

AC VOLTS

AC VOLTS

HOT TOSAFTEY GND

HOT TONEUTRAL

ISOLATEDOUTPUT

HOT TOEXTERNAL

EARTH GNDValid only when

connected toExternal Earth Gnd

CURRENT/POWER

CURRENT/POWER

TRIP RESET CURRENT

POWER

LEAKAGE

TRIP SET

HOTCHASSIS

Amps

Amps

uAmps

Watts

uAmps

VARIABLE ISOLATION TRANSFORMER &SAFETY ANALYZER

PR570

MIN MAXMAXMIN

ONOFF

ISOLATED OUTPUTVOLTAGE

TRIP SET

100 uAMP LEAKAGECAL CHECK

Set Output to 120VAC &Touch Safety Probe Here.

3 Amps At 117VAC Continous, 4 Amps Intermittent Use

TO EXTERNALEARTH GND

Refer ToPull Chart

Isolated OutputOn When Lit

AUTO-TOGGLE

AC Line Safety GndBoth Must Light

SAFETY PROBEINPUT

POWER

POWERITE II

WARNING:For EquipmentUnder TestOnly!

!

ISOLATED OUTPUT

Isolated Output On Indicator (On when Lit.)

Output Off - Output OnSwitch(Switches Isolated Output Voltage On or Off)

Isolated Output Current & Power Monitoring

AC VOLTS

AC VOLTS

HOT TOSAFTEY GND

HOT TONEUTRAL

ISOLATEDOUTPUT

HOT TOEXTERNAL

EARTH GNDValid only when

connected toExternal Earth Gnd

CURRENT/POWER

CURRENT/POWER

TRIP RESET CURRENT

POWER

LEAKAGE

TRIP SET

HOTCHASSIS

Amps

Amps

uAmps

Watts

uAmps

VARIABLE ISOLATION TRANSFORMER &SAFETY ANALYZER

PR570

MIN MAXMAXMIN

ONOFF

ISOLATED OUTPUTVOLTAGE

TRIP SET

100 uAMP LEAKAGECAL CHECK

Set Output to 120VAC &Touch Safety Probe Here.

3 Amps At 117VAC Continous, 4 Amps Intermittent Use

TO EXTERNALEARTH GND

Refer ToPull Chart

Isolated OutputOn When Lit

AUTO-TOGGLE

AC Line Safety GndBoth Must Light

SAFETY PROBEINPUT

POWER

POWERITE II

WARNING:For EquipmentUnder TestOnly!

!

ISOLATED OUTPUT

Isolated OutputCurrent & WattsMeter

Isolated Output Circuit Breaker

AC VOLTS

AC VOLTS

HOT TOSAFTEY GND

HOT TONEUTRAL

ISOLATEDOUTPUT

HOT TOEXTERNAL

EARTH GNDValid only when

connected toExternal Earth Gnd

CURRENT/POWER

CURRENT/POWER

TRIP RESET CURRENT

POWER

LEAKAGE

TRIP SET

HOTCHASSIS

Amps

Amps

uAmps

Watts

uAmps

VARIABLE ISOLATION TRANSFORMER &SAFETY ANALYZER

PR570

MIN MAXMAXMIN

ONOFF

ISOLATED OUTPUTVOLTAGE

TRIP SET

100 uAMP LEAKAGECAL CHECK

Set Output to 120VAC &Touch Safety Probe Here.

3 Amps At 117VAC Continous, 4 Amps Intermittent Use

TO EXTERNALEARTH GND

Refer ToPull Chart

Isolated OutputOn When Lit

AUTO-TOGGLE

AC Line Safety GndBoth Must Light

SAFETY PROBEINPUT

POWER

POWERITE II

WARNING:For EquipmentUnder TestOnly!

!

ISOLATED OUTPUT

Position To MeterCircuit BreakerLevel 0-4Amps

Reset ifCircuitBreakerTrips

ControlSetsCircuitBreaker0-4A

• If the “HOT” ground of the power supply becomes electronically connected to exterior parts of the cabinet housing, a shock hazard exists.

• Protect yourself, your business and your customer. ALWAYS perform a leakage current check after completing a repair!

Causes of Excess AC Leakage Current

Defective AC Line or Switching SupplyIsolation Transformers

Leaky AC Bypass Filter Capacitors

Improper Part Installation - Safety CriticalIsolation Parts

Foreign Objects - Coins, screws, paper clips

DriveG enerator/

Contro l

Feedback/Contro l

M IC 1

M IC 2

M IC 3

M IC 4

Sw itchingT ransistor

Sw itchingT ransform er

Startup

SMPS Safety Leakage Paths

Switch Mode Transformer Primary to SecondaryAC Input Filter CapacitorsIsolation Filter Capacitors Between Hot & IsolatedGrounds

Effects of AC Leakage

Imperceptible

Mild sensation

Painful sensation

Cannot let go

Breathing stopsOften fatal

Heart fibrillation in 1.4seconds - Usually fatal

Heart stops during shock -May Restart if current isremoved before death

Severe burns, but not fatalunless vital organs burned

100 A

1mA

10mA

100mA

1A

10A

500

5

30

50

250

500

45

UL limit for hospitalequipment not

connected directly tothe body

UL limit for consumerproducts

HighestDanger

A safety leakage test ensures that the monitor doesn’t have AC line leakage to exposed metal partsVirtually all manufacturer’s service literature requires a safety leakage test be performed at the completion of any repairSafety leakage testing applies to all consumer electronic devices powered from the AC line, whether or not they have a 3-wire power cordUnderwriter’s Laboratory (UL) standard is 500a

Other standards may applyInternational Electrotechnical Commission (IEC)standard is 700 a

Safety Leakage Testing

• Underwriter’s Laboratory (UL) standard is 500a

• International Electrotechnical Commission (IEC)standard is 700 a

0.15 F

1500 , 10W

WATERPIPE(EARTHGROUND)

TOINSTRUMENT'SEXPOSEDMETAL PARTS

1 Do not use an isolation transformer for this test. Plug the completely reassembled unit directly into the ac outlet.

2 Connect a 1.5K, 10W resistor paralleled by an .015uF capacitor between each exposed metal cabinet part and a good earth ground such as a water pipe, as shown above.

3 Use an ac voltmeter with at least 5000 ohms/volt sensitivity to measure the potential across the resistor.

4 The potential at any point should not exceed 0.75 volts. A leakage current tester may be used to make this test; leakage current must not exceed 0.5 milliamps. If a measurement is outside of the specified limits, there is a possibility of shock hazard. The chassis should be repaired and rechecked before returning it to the customer.

5 Repeat the above procedure with the ac plug reversed. (Note: An ac adapter is necessary when a polarized plug is used. Do not defeat the polarizing feature of the plug.)

Manufacturer Safety Leakage Test

AC VOLTS

AC VOLTS

HOT TOSAFTEY GND

HOT TONEUTRAL

ISOLATEDOUTPUT

HOT TOEXTERNAL

EARTH GNDValid only when

connected toExternal Earth Gnd

CURRENT/POWER

CURRENT/POWER

TRIP RESET CURRENT

POWER

LEAKAGE

TRIP SET

HOTCHASSIS

Amps

Amps

uAmps

Watts

uAmps

VARIABLE ISOLATION TRANSFORMER &SAFETY ANALYZER

PR570

MIN MAXMAXMIN

ONOFF

ISOLATED OUTPUTVOLTAGE

TRIP SET

100 uAMP LEAKAGECAL CHECK

Set Output to 120VAC &Touch Safety Probe Here.

3 Amps At 117VAC Continous, 4 Amps Intermittent Use

TO EXTERNALEARTH GND

Refer ToPull Chart

Isolated OutputOn When Lit

AUTO-TOGGLE

AC Line Safety GndBoth Must Light

SAFETY PROBEINPUT

POWER

POWERITE II

WARNING:For EquipmentUnder TestOnly!

!

ISOLATED OUTPUT

Safety Leakage Testing

Checking Leakage Test Calibration

AC VOLTS

AC VOLTS

HOT TOSAFTEY GND

HOT TONEUTRAL

ISOLATEDOUTPUT

HOT TOEXTERNAL

EARTH GNDValid only when

connected toExternal Earth Gnd

CURRENT/POWER

CURRENT/POWER

TRIP RESET CURRENT

POWER

LEAKAGE

TRIP SET

HOTCHASSIS

Amps

Amps

uAmps

Watts

uAmps

VARIABLE ISOLATION TRANSFORMER &SAFETY ANALYZER

PR570

MIN MAXMAXMIN

ONOFF

ISOLATED OUTPUTVOLTAGE

TRIP SET

100 uAMP LEAKAGECAL CHECK

Set Output to 120VAC &Touch Safety Probe Here.

3 Amps At 117VAC Continous, 4 Amps Intermittent Use

TO EXTERNALEARTH GND

Refer ToPull Chart

Isolated OutputOn When Lit

AUTO-TOGGLE

AC Line Safety GndBoth Must Light

SAFETY PROBEINPUT

POWER

POWERITE II

WARNING:For EquipmentUnder TestOnly!

!

ISOLATED OUTPUT

Set Isolated Output to120VAC. Leakage TestShould Read 100uA +/- 2 Counts

IndicatesIsolated Output

is Active

GETTING STARTED:

1. Turn the PR570 power switch “ON.” Confirm proper AC supply voltage to the PR570 by readingthe “HOT TO SAFETY GROUND” and “HOT TO NEUTRAL” voltages (expect 115VAC to125VAC in the left LCD readout).

NOTE: An open safety ground results in a low “HOT TO SAFETY GROUND” measurement.

2. Turn the AC VOLTS switch to the “ISOLATED OUTPUT” position. Adjust the Isolated OutputVoltage (viewed in the left LCD readout) to 120 VAC using the ISOLATED OUTPUT control.

3. Set the Isolated Output “TRIP SET” to 2 AMPS by placing the CURRENT/POWER switch inthe “TRIP SET” position and adjusting the TRIP SET control until 2.00 is displayed in the right LCD readout.

AC VOLTS

AC VOLTS

HOT TOSAFTEY GND

HOT TONEUTRAL

ISOLATEDOUTPUT

HOT TOEXTERNAL

EARTH GNDValid only when

connected toExternal Earth Gnd

CURRENT/POWER

CURRENT/POWER

TRIP RESET CURRENT

POWER

LEAKAGE

TRIP SET

HOTCHASSIS

Amps

Amps

uAmps

Watts

uAmps

VARIABLE ISOLATION TRANSFORMER &SAFETY ANALYZER

PR570

MIN MAXMAXMIN

ONOFF

ISOLATED OUTPUTVOLTAGE

TRIP SET

100 uAMP LEAKAGECAL CHECK

Set Output to 120VAC &Touch Safety Probe Here.

3 Amps At 117VAC Continous, 4 Amps Intermittent Use

TO EXTERNALEARTH GND

Refer ToPull Chart

Isolated OutputOn When Lit

AUTO-TOGGLE

AC Line Safety GndBoth Must Light

SAFETY PROBEINPUT

POWER

POWERITE II

WARNING:For EquipmentUnder TestOnly!

!

ISOLATED OUTPUT

Displays AC Receptacle& Isolated Output

AC Voltages

Adjusts ACV atIsolated Output

Measures Current or Power Delivered to

Isolated Output

Displays Current, Power, & Voltage at

Isolated Output

Measures Input ACV to Safety Ground

ResetsIsolated Output

Trip Current

Measures Variable ACV at Isolated Output

Isolated VariableAC Output

Select to ViewTrip Current

Measures ACLeakage

AdjustsIsolated Output

Trip Current Level

PR570 Function Review

Congratulations! You are now an experienced PR570 User