ur24 process refractometer. ur24 refractometer
TRANSCRIPT
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UR24 Process RefractometerUR24 Process Refractometer
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UR24 Refractometer
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UR24 - Optical Path
1
2
34
5
6
1 - LED SOURCE
2 - BICONVEX LENS
3 - ENTRANCE LENS
4 - PRISM
5 - EXIT LENS
6 - CCD DETECTOR
85 Brix
10 Brix
0 Brix
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UR24 - The four basic elements
In order to obtain a refractometric measure need four basic elements:
1) A light source (LED source)
2) An optical sensor (CCD sensor)
3) A well defined optic path (lenses and instrument geometry)
4) A prism made in high nD material
1
2
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UR24 - Interface detection
Threshold
Derivative
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UR24 - Technical features
• Measurement limits: 0-95 Bx
• Measurement range UR24 ST: min 30 Bx, max 95 Bx
• Accuracy ST version: 0.5% measurement range (+/- 0.15 Bx)
• Measurement range UR24 H.A.: min 15 Bx, max 95 Bx
• Accuracy H.A. version: 0.3% measurement range (+/- 0.05 Bx)
• “User” range on request
• Pt100 external temperature sensor (internal on request)
• Automatic temperature compensation: -5 °C / 105 °C
• Long probe version for boule applications and/or high temperature applications (up to 140 °C)
• Analog output: 0-20, 4-20 mA
• Serial output: RS422/485
• Profibus module on request
• Washing/Alarm contact
• Hold measure contact
• Power supply:
18-36VDC 10W or 12-24VAC 50-60Hz 10VA (AC 115/230V ±10% 50…60Hz 10VA on request)
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• Sapphire prism
• Removable prism-holder
• High efficiency LED light source
• CCD optical sensor (2048 pixels)
• Single board SMD electronics
• Serial port software upgrade
• Dehydrating cartridge
• Interfacing with water proof connector
• LCD graphic display
• 4-keys polyester membrane keypad
• 3A enclosure on request
• Materials in contact with product:
AISI316, sapphire/glass (others on request)
• Working pressure: -1 / 15 bar
• Weight: 3Kg
• Enclosure: stainless steel IP67
UR24 - Technical features
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UR24 Standard
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UR24 Long Probe with Tri-Clamp at 21mm
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UR24 Long Probe with Tri-Clamp at 70 mm
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UR24 Adaptors
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UR24 - Installation examples
on line
by pass
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UR24 - Installation examples
pump
on boule
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UR24 - Special plug for selfcleaning
speed = flow rate
clearance section =
flow rate
* clearance widthclearance heigth
Each product has its own optimal speed for prism selfcleaning
Changing the clearance height allows to have the optimal cleaning
for each product
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UR24 - Cleaning systems
• special plug with
washing
• special plug with
mechanical cleaner
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UR24 - Cleaning systems
• special plug with
mechanical cleaner
and washing
• washing on pipe • washing on tank
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UR24 - User configuration
% weight/weight
nD
0 168 25 33 42 501,33
1,38
• nD - concentration
Instrument takes into account typical behaviour for nD
• nD - temperature
nD1,30 1,40
10
20
30
T (°C)
20% in water
Default configuration: sucrose solution curves
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UR24 - User configuration
Product sampleProduct sample
TermostatingUnit
1st STEP: at 20°C fixed temperature find the relationship between the concentration and the refraction index.
2nd STEP: at fixed concentration find the relationship between the corrections, you have to add to the 20°C value and the temperature
3rd STEP: transfer data in the UR24 refractometric unit
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UR24 - User configuration
• REFRACTION INDEX-CONCENTRATION configuration
Found the relationship between concentration and nD at seven
different values of concentration at 20 °C for desired product
nD %
1.3345 0.0
1.3401 5.1
1.3487 12.7
1.3576 19.1
1.3612 29.7
1.3762 38.5
1.3832 49.7
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UR24 - User configuration
• TEMPERATURE COMPENSATION configuration
Measuring the refractive index at three different concentrations at
three different temperatures, insert the errors in temperature table
(difference between read values of each concentration at that
temperature and at 20°C)