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M212898EN-C User Guide Vaisala Polaris Process Refractometer PR53 Series...
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This product contains software developed Translated documents and translated by Vaisala or third parties. Use of the portions of multilingual documents are software is governed by license terms and based on the original English versions. In...
Analog output....................24 Start-up......................26 Start-up......................26 5.1.1 Starting up stand-alone refractometer..........26 5.1.2 Starting up refractometer with Indigo520...........26 Using refractometer with Vaisala Indigo520........28 Vaisala Indigo520 transmitter...............28 Connecting to Indigo520................28 General settings....................29 Diagnostics menu................... 29 6.4.1 Viewing refractometer status..............29 Concentration measurement................ 29 6.5.1...
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6.8.1 Exponential damping................37 6.8.2 Linear damping..................38 6.8.3 Slew rate limit..................39 Using refractometer with Vaisala Insight software......41 Insight PC software..................41 Connecting to Insight software..............41 Insight main view................... 43 7.3.1 Basic and Advanced user modes............44 Concentration measurement................ 44 7.4.1...
• PR53AP specifications (page 77) • PR53GC specifications (page 80) • Cleaning refractometer and prism (page 62) Updated sections: • Refractometer connections (page 17) M212898EN-A May 2023 First version. 1.2 Related manuals For the latest versions of these documents, see docs.vaisala.com.
M212931EN Vaisala Polaris Process Refractometer PR53GC Installation Guide M212873EN Vaisala Polaris Process Refractometer PR53GP Installation Guide M212808EN Vaisala Polaris Process Refractometer PR53 Prism Wash System User Guide M212287EN Vaisala Indigo500 Series Transmitters User Guide 1.3 Documentation conventions WARNING! Warning alerts you to a serious hazard. If you do not read and follow instructions carefully at this point, there is a risk of injury or even death.
Chapter 1 – About this document 1.4 Trademarks Vaisalaâ, Polaris ™ , and Indigo ™ are trademarks of Vaisala Oyj. Modbusâ is a registered trademark of Schneider Automation Inc. All other product or company names that may be mentioned in this publication are trade names, trademarks, or registered trademarks of their respective owners.
2.1.1 ESD protection Electrostatic discharge (ESD) can damage electronic circuits. Vaisala products are adequately protected against ESD for their intended use. However, it is possible to damage the product by delivering electrostatic discharges when touching, removing, or inserting any objects in the equipment housing.
One or two refractometers can be connected to one Indigo520 transmitter. For service purposes, the PR53 refractometer can be connected directly to an Indigo80 handheld indicator, or to a PC using a USB adapter and Vaisala Insight software. 2.4 PR53 refractometer models There are different PR53 refractometer models.
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• The Vaisala Polaris PR53GC general-purpose compact process refractometer is designed for measuring concentrations of acids, alkaline solutions, alcohols, hydrocarbons, solvents, and various other solutions. • The Vaisala Polaris PR53GP general-purpose probe process refractometer is designed for measuring concentrations of sugars/Brix, acids, alkaline solutions, hydrocarbons, solvents, and various other solutions.
Chapter 2 – Product overview 2.5 Refractometer structure Figure 2 PR53 refractometer structure Main circuit board CCD Charge Coupled Device Disc springs CORE‑Module Light source Prism Prism gasket Integrated temperature sensor The measurement prism (6) is flush-mounted to the surface of the probe tip. The prism (6) and all the other optical components are fixed to the solid CORE‑Module (4), which is springloaded (3) against the prism gasket (8).
PR53 Series User Guide M212898EN-C 2.6 Storing and transporting Soft shell packaging prevents damage to the components of the refractometer. Transport the device in its original packaging. Before storing, remove any dirt and grease from the refractometer and make sure that it is dry.
3.6 mA. The output is configurable: The output value (refractive index, temperature, concentration, quality factor), scaling, and error status indication level can be configured using the Vaisala Insight software and a USB adapter. The connection header also has an RS-485 port. This allows using the refractometer directly as a Modbus RTU server device.
PR53 Series User Guide M212898EN-C Analog output (-) Analog output (+) VIN (+) VIN (-) SHIELD (Optional) Figure 4 Connecting wires inside the refractometer (analog output) More information ‣ Starting up refractometer with Indigo520 (page 26) 3.2 System wiring The analog and Modbus RTU wiring configurations are examples of system wiring.
Chapter 3 – Refractometer connections Indigo520 wiring Indigo520 PR53 Relay 1 Relay 2 Analog outputs mA 1 mA 2 mA 3 mA 4 See manual for Indigo520 power options and specifications (M212287EN) 4 – 20 mA output 4 4 – 20 mA output 3 4 –...
PR53 Series User Guide M212898EN-C Modbus RTU system Receiving system (Modbus RTU) PR53 Figure 7 Wiring diagram for PR53 and Modbus RTU 3.3 Wiring considerations The chassis ground and ground terminal are electrically connected. Grounding can be done either by connecting the cable shield to the respective terminal in the wiring header, or alternatively by connecting the cable shield to the cable gland.
Indigo520 transmitter, Indigo80 handheld indicator or Insight software. • Red indicates a critical failure where user interference is required. When the red LED is on, the refractometer may need to be sent to Vaisala for service. Contact helpdesk@vaisala.com. The error codes can be read either through the Indigo520 transmitter, Modbus RTU port, Indigo80 handheld indicator, or Vaisala Insight software with a USB adapter.
Chapter 4 – User interfaces 4.2 Indigo520 user interfaces Vaisala Indigo520 is a transmitter that accommodates maximum of two PR53 refractometers for liquid measurements. The transmitter can display measurements on the spot as well as transmit them to automation systems through analog signals, control relays, or Modbus TCP/IP protocol.
• See real-time measurement data. • Manage concentration curves • Calibrate and adjust the device. Download Insight at www.vaisala.com/insight. The refractometer can be connected to Insight using a Vaisala Indigo USB adapter (item code USB2). More information ‣ Connecting to Insight software (page 41) 4.4 Modbus RTU...
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Chapter 4 – User interfaces When PR53 is connected to Indigo520, Indigo provides more analog output channels. The integrated analog output channel and the Indigo520 analog outputs are independent from each other, and can also be used simultaneously. For configuring analog output with Indigo520, see Indigo500 User Guide (M212287EN).
PR53 Series User Guide M212898EN-C 5. Start-up 5.1 Start-up The PR53 unit is configured at the factory and ready to be used. The concentration model has been set up according to the order. If the concentration model needs to be changed, it can be done using the service port and Insight software.
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Chapter 5 – Start-up 3. After the refractometer has been detected, configure the numerical and graphical display views and analog output channels using the Indigo520 display or the web user interface. Indigo500 User Guide (M212287EN) for details. If you have the optional prism wash system installed, you need to perform a prism wash test.
PR53 Series User Guide M212898EN-C 6. Using refractometer with Vaisala Indigo520 6.1 Vaisala Indigo520 transmitter With Vaisala Indigo520 Transmitter, you can: • View the refractometer status • Adjust concentration measurement • RI calibration • Configure analog output channel • Configure analog output signal damping •...
Chapter 6 – Using refractometer with Vaisala Indigo520 4. Connect the wires inside the transmitter, see Indigo500 User Guide (M212287EN). 6.3 General settings You can edit the general settings of the refractometer in Menu > <your refractometer> > General. In General, you can give a custom name to the refractometer.
PR53 Series User Guide M212898EN-C Light area Pt-1000 Refractive index Concentration curve Temperature concentration Field adjustment Adjusted concentration Damping Concentration Analog output Figure 12 Concentration measurement layers Light area information comes from the CCD element and temperature information from Pt-1000 temperature element. The position of the shadow edge is light area and scaled 0–...
16 parameters, C-parameters. A concentration curve is specific to the given process medium, for example, sucrose or sodium hydroxide. The set of parameters is given by Vaisala. Do not alter the C-parameters, except if you are changing to another process medium.
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PR53 Series User Guide M212898EN-C Accurate calibration is only achieved if the sample is taken correctly. Pay special attention to following details: • Field adjustment using the process liquid must always be made inline. • The sampling valve and the refractometer should be installed close to each other in the process.
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A concentration curve is specific to the given process medium, for example, sucrose or sodium hydroxide. The set of parameters is given by Vaisala. Do not alter the concentration curve parameters, except if you are changing to another process medium.
Email the data to your local Vaisala representative. Vaisala makes a computer analysis of the data and sends optimal calibration parameters to be entered into the Indigo520 transmitter or Insight PC software.
Chapter 6 – Using refractometer with Vaisala Indigo520 The refractometer comes with a calibration certificate which ensures that it has fulfilled the measurement criteria when sent from the factory. RI calibration is needed when the optics of the device is serviced and RI adjustment needs to be performed.
PR53 Series User Guide M212898EN-C 5. Let the refractometer and sample liquid temperature settle to room temperature, +20 … +30 ℃ (+68 … +86 ℉). Calibration must be done within this temperature range. The cooling of the refractometer may take several hours.
Chapter 6 – Using refractometer with Vaisala Indigo520 6. Once the calibration process is ready, results are displayed in the results screen. You can later view the results of a calibrated point by selecting a calibration point tile from the calibration view.
PR53 Series User Guide M212898EN-C In the exponential damping, the damping time is the time it takes for the concentration measurement to reach half of its final value at a step change. For example, if the concentration changes from 50 % to 60 % and damping time is 10 s, it takes 10 s for the Indigo520 to display concentration 55 %.
Chapter 6 – Using refractometer with Vaisala Indigo520 The following figure shows how linear damping time affects the measurement. Figure 14 Linear damping 6.8.3 Slew rate limit If the process signal has short erroneous high or low peaks, the slew rate limiting can be used to cut their effects.
PR53 Series User Guide M212898EN-C The following figure gives an example of different slew rate limits. Figure 15 Slew rate damping To avoid overdamping, do not make the signal insensitive.
Chapter 7 – Using refractometer with Vaisala Insight software 7. Using refractometer with Vaisala Insight software 7.1 Insight PC software With Vaisala Insight PC software, you can: • Configure analog output channel • Configure signal damping • Adjust concentration curves • Calibrate the RI measurement •...
PR53 Series User Guide M212898EN-C Figure 16 Connecting refractometer to Insight 1. Open the Insight software on your PC. 2. Connect the USB cable to a free USB port on the PC.
Chapter 7 – Using refractometer with Vaisala Insight software 7.3 Insight main view Select to access the device-specific menu. • Configure device: environmental compensation settings, analog output 1 and 2 settings, filtering factor and general settings. • Export settings: creates a text file export of the device settings.
Depending on the connected device, switching to Advanced mode may provide access to additional configuration options. Use these options only as described in the product documentation or as instructed by Vaisala support. 7.4 Concentration measurement Adjustment of the raw concentration value may be required to compensate for some process conditions or to fit the measurement to the laboratory results.
Chapter 7 – Using refractometer with Vaisala Insight software Light area Pt-1000 Refractive index Concentration curve Temperature concentration Field adjustment Adjusted concentration Damping Concentration Analog output Figure 17 Concentration measurement layers Light area information comes from the CCD element and temperature information from Pt-1000 temperature element.
16 parameters, C-parameters. A concentration curve is specific to the given process medium, for example, sucrose or sodium hydroxide. The set of parameters is given by Vaisala. Do not alter the C-parameters, except if you are changing to another process medium.
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Chapter 7 – Using refractometer with Vaisala Insight software Accurate adjustment is achieved only if the sample is taken correctly. Pay special attention to following details: • Field adjustment using the process liquid must always be made inline. • The sampling valve and the refractometer should be installed close to each other in the process.
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A concentration curve is specific to the given process medium, for example, sucrose or sodium hydroxide. The set of parameters is given by Vaisala. Do not alter the concentration curve parameters, except if you are changing to another process medium.
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Chapter 7 – Using refractometer with Vaisala Insight software 2. You can change the C parameters in > Configure device > Concentration curve 1/2/3/4. Changing from one concentration curve to another changes the way concentration is calculated from monitored liquids. The refractometer will restart to apply the change.
Email the data to your local Vaisala representative. Vaisala makes a computer analysis of the data and sends optimal calibration parameters to be entered into the Indigo520 transmitter or Insight PC software.
Chapter 7 – Using refractometer with Vaisala Insight software • Environment with a good ventilation Nominal reference RI liquids There are two prism types, each of which have their own nominal reference RI liquid sets. You can check which prism your refractometer has from the configuration code by the side of the refractometer.
PR53 Series User Guide M212898EN-C 5. Apply sample liquid onto the sample holder and place the light cover on top. Do not hold the refractometer or sample liquid container in your hand or near external heat sources during calibration. Changes in the refractometer or sample liquid temperature may decrease the quality of the measurement point or cause it to fail.
In order to perform RI calculation adjustment, you need to calibrate at least five calibration points that all have a different Nominal RI. You can do this in the RI calibration menu. Vaisala recommends that you perform RI adjustment based on a recent calibration.
PR53 Series User Guide M212898EN-C 3. Wait for the measurement to stabilize fully. The graph shows readings of the last 60 minutes. 4. When the measurement has stabilized, select the Reference value, point 1 text box and enter the temperature of calibration point 1. Select ENTER or click outside the field when done.
Chapter 7 – Using refractometer with Vaisala Insight software • Not applicable: Appears only if VD algorithm is used as detection algorithm. More information ‣ Creating blank image (page 55) 7.8.1 Creating blank image This is a maintenance operation only. The procedure should only be done if the prism has been replaced, for example.
PR53 Series User Guide M212898EN-C • No sample error output and No sample error output level allow you to set a secondary mA output value for empty pipe (message No liquid detected) to differentiate it from the other messages that cause the measurement to revert to default mA. By default the secondary mA output is disabled.
Chapter 7 – Using refractometer with Vaisala Insight software 10. Disable the Test mode (switch to OFF position) and select Close to exit the calibration mode. 11. Replace the original analog output wiring. 7.9.2 Configuring analog output signal damping You can apply signal damping in >...
PR53 Series User Guide M212898EN-C The following figure shows how exponential damping time affects the measurement. Figure 18 Exponential damping 7.9.2.2 Linear damping If the process has fast step changes, linear (fast) damping gives shorter settling time. In the linear damping, the output is the running average of the signal during the damping time.
Chapter 7 – Using refractometer with Vaisala Insight software The following figure shows how linear damping time affects the measurement. Figure 19 Linear damping 7.9.2.3 Slew rate limit If the process signal has short erroneous high or low peaks, the slew rate limiting can be used to cut their effects.
PR53 Series User Guide M212898EN-C The following figure gives an example of different slew rate limits. Figure 20 Slew rate damping To avoid overdamping, do not make the signal insensitive. 7.10 Configuring Modbus communication settings with Insight You can configure the following Modbus communication settings with the Insight PC software: •...
Chapter 7 – Using refractometer with Vaisala Insight software 3. Select Save to store the settings. More information ‣ Modbus RTU (page 24) ‣ Modbus registers (page 88) ‣ System wiring (page 18) ‣ Starting up stand-alone refractometer (page 26) 7.11 Restoring factory settings...
PR53 Series User Guide M212898EN-C 8. Preventive maintenance 8.1 Preventive maintenance PR53 process refractometers do not have wearing parts or periodically changeable parts. Depending on the process conditions, PR53 process refractometers may never need to be serviced. There a few things that should be monitored: Table 7 Preventive maintenance...
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Chapter 8 – Preventive maintenance Cleaning the refractometer Clean the refractometer by using a suitable solvent and a moist cloth.
PR53 Series User Guide M212898EN-C 9. Troubleshooting 9.1 Troubleshooting messages Table 8 Hardware troubleshooting Problem Severity Cause Corrective action level Message Internal Error The relative humidity Make sure that the prism humidity too high measured at the seal is intact and the cover refractometer's processor is closed.
Chapter 9 – Troubleshooting Problem Severity Cause Corrective action level Analog output signal is not Check wiring, see the model-specific installation guide. working as expected If the analog output signal does not correspond to the concentration display, check output signal configuration, see Diagnostics.
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PR53 Series User Guide M212898EN-C Problem Severity Cause Corrective action level Message Blank image Critical Blank image is missing or A trained person can corrupted corrupted. create a blank image. Contact helpdesk@vaisala.com. Message External light Error The measurement is not...
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Contact your used curve, the sales representative or measurement result may helpdesk@vaisala.com. be unreliable. 2. If you know that the measurement does not correspond to the true concentration value, the refractometer needs to be serviced.
PR53 Series User Guide M212898EN-C Problem Severity Cause Corrective action level Message Calibration Warning When calibration mode is Make sure that the mode active active, the refractometer calibration mode is off in will not calculate the all used user interfaces.
Invalid calculation parameters: RI adjustment parameters are invalid. Perform RI adjustment or contact helpdesk@vaisala.com. Blank image corrupted: Blank image for IDS image detection algorithm is corrupted. Create blank image or contact helpdesk@vaisala.com. 9.3 Measurement status details There are different measurement statuses that you can view in the Diagnostics tab of the Insight software.
PR53 Series User Guide M212898EN-C Message C measurement status T measurement status Field sample status Over range (O) Refractometer is Refractometer is measuring a value measuring a value outside concentration outside concentration curve measurement curve measurement range. range. Locked (L)
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Chapter 9 – Troubleshooting • Reference liquid related failures: • There is coating on the prism. Clean the prism and the sample holder, and then recalibrate. • There are impurities in the sample liquid. Clean the prism and the sample holder. Replace the sample liquid and then recalibrate.
PR53 Series User Guide M212898EN-C 10. Technical data 10.1 Compatibility PR53 refractometer is mechanically compatible with most PR-23 and PR-43 refractometers. The communication and electronic system has to be updated with the refractometer change. 10.2 PR53 common specifications Table 12 Measurement performance Property Description/Value...
PR53 Series User Guide M212898EN-C Property Specification Pressure CRN all territories, ASME BPVC Sec VIII Div. 1 Ed. 2021 Material compliance FDA 21 CFR 177.150, 177.2600, 177.1550 EC 1935/2004 EC 2023/2006, GMP EU 10/2011 Compliance marks CE, China RoHS, RCM, UKCA...
Chapter 10 – Technical data Process temperature (°C) - 40 - 20 140 150 - 20 Normal operation Not recommended for continuous operation Out of operating range, do not install Figure 21 PR53AC process temperature, options Sanitary 2.5" and Type N (indicative) Process temperature (°C) - 25 Sanitary high pressure clamp 2.5"...
Chapter 10 – Technical data 3-A certificate, EHEDG certificate. 10.4 PR53AP specifications Table 18 Operating environment Property Specification Process parameters Process temperature –40 … +150 °C (–40 … +302 °F) Design temperature +180 °C (356 °F) Design pressure 40 bar Operating environment Storage temperature −40 …...
PR53 Series User Guide M212898EN-C Process temperature (°C) - 40 - 20 140 150 - 20 Normal operation Out of operating range, do not install Figure 23 PR53AP process temperature (indicative) Process temperature (°C) - 25 Sanitary high pressure clamp 2.5"...
PR53 Series User Guide M212898EN-C Property Specification Weight 3.6–4.2 kg (7.94–9.26 lb) Material certificate included. Manufacturer's declaration included. ADI free, FDA 21 C.F.R 177.1550, 3A Sanitary Standard, USP Class VI <88>, 70 °C. 3-A certificate, EHEDG certificate. 10.5 PR53GC specifications Table 21 Operating environment...
Chapter 10 – Technical data Process temperature (°C) - 40 - 20 140 150 - 20 Normal operation Not recommended for continuous operation Out of operating range, do not install Figure 25 PR53GC process temperature (indicative) Process temperature (°C) - 25 L coupling Figure 26 PR53GC process pressure Table 22 Mechanical specifications...
Chapter 10 – Technical data Property Specification Process temperature –40 … +150 °C (–40 … +302 °F) Design temperature +180 °C (356 °F) Design pressure 40 bar -40 ... +130 °C EPDM gasket, -40... +150 °C EHEDG gasket. Maximum momentary temperature peak. Maximum at +20 °C, operating pressure to the clamp rating pressure.
10.8 Recycling instructions These recycling instructions guide you on the end-of-life treatment of this Vaisala product. As waste regulations and infrastructure vary in each country, these instructions only indicate the different components to be separated and common ways to handle them. Always follow local requirements when disposing of the product.
PR53 Series User Guide M212898EN-C Electrical and electronical waste Metal waste Other Figure 29 Materials for recycling Table 26 Materials for recycling Part Material Recycling Cover Stainless Steel Metal waste...
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Chapter 10 – Technical data Part Material Recycling Screws and washers Stainless steel Metal waste O-rings Other Electronics Various Electrical and electronic waste Enclosure Stainless Steel Metal waste Prism Sapphire Other cables Various Electrical and electronic waste Cable gland Various Metal waste Conduit hub Various...
PR53 Series User Guide M212898EN-C 11. Modbus registers 11.1 Modbus registers Table 27 Measurement data registers (read-only) Register number Address Register Data format Unit (decimal) (hexadecimal) description 0002 Concentration 32-bit float 0003 0004 Temperature 32-bit float °C 0005 0006 32-bit float concentration 0007...
Error code 32-bit integer 0203 0204 Error subcode 32-bit integer 0205 Error subcode is meant to be sent to Vaisala service along with error code. Table 30 Error code encoding … 17 16 15 14 13 12 11 10 … System Environment...
PR53 Series User Guide M212898EN-C Error code register value Corresponding error Image detection status Image quality low. External light level high. Prism coating detected. No liquid detected. No optical image. External light level too high. Temperature measurement status Temperature measurement error.
Chapter 11 – Modbus registers Register number Address Register Data format Unit / Valid range (decimal) (hexadecimal) description 1801 0708 No sample error 32-bit float 0.0–20.5 mA output level 0709 Temperature offset 8967 2306 T offset 32-bit float °C * Depends on the active concentration curve Table 33 Concentration curve configuration registers Register Address...
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PR53 Series User Guide M212898EN-C Register Address Register Data format Unit Writable number (hexadecimal) description (decimal) 14 + base 000E – Description text 002D base 95 + base 005F Chemical 32-bit float coefficients, base 0060 base 97 + base 0061...
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Chapter 11 – Modbus registers Register Address Register Data format Unit Writable number (hexadecimal) description (decimal) 111 + base 006F Chemical 32-bit float coefficients, base 0070 base 113 + base 0071 + base Chemical 32-bit float coefficients, 0072 + base 115 + base 0073 + base Chemical...
PR53 Series User Guide M212898EN-C Register Address Register Data format Unit Writable number (hexadecimal) description (decimal) 131 + base 00A1 + base Field gain 32-bit float 00A2 base Concentration curve bases 3073 0C00 Concentration curve 1 3329 0D00 Concentration curve 2...
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Calibration date in YYYY-MM-DD format. Empty string if not set/ valid. 82hex ”Vaisala/HEL” CalibrationText Calibration information text. Empty string if not set/valid. Vaisala-specific device information object More information ‣ Modbus RTU (page 24) ‣ Configuring Modbus communication settings with Insight (page 60)
M212898EN-C Appendix A. Principle of measurement The Vaisala K‑PATENTSâ inline process refractometer determines the refractive index (RI) of the process solution. It measures the critical angle of refraction using a yellow LED light source with the same wavelength (589 nm) as the sodium D line. Light from the light source (L) in the following figure is directed to the interface between the prism (P) and the process medium (S).
Appendix A – Principle of measurement The refractive index changes with the process solution concentration and temperature. For most solutions the refractive index increases when the concentration increases. At higher temperatures the refractive index is smaller than at lower temperatures. From this follows that the optical image changes with the process solution concentration as shown in the following figure.
PR53 Series User Guide M212898EN-C Appendix B. Analyzing optical image The optical image can tell you about problems, for example, with the condition of the prism. Y-axis is light intensity and X-axis the position of the shadow edge. RI calibration follows the X- axis.
Appendix B – Analyzing optical image Prism coated CCD card is disconnected or faulty, or LED card is disconnected or faulty, or the optical fiber is broken Table 37 Prism scaling Good • Measurement status Normal operation. • Observe the angle, drop from high intensity light to low light intensity should be as steep as possible.
Maintenance and calibration services Vaisala offers comprehensive customer care throughout the life cycle of our measurement instruments and systems. Our factory services are provided worldwide with fast deliveries. For more information, see www.vaisala.com/ calibration. • Vaisala Online Store at store.vaisala.com is available for most countries.