M212455EN-B
User Guide
Process Refractometer
PR-43 Series
PUBLISHED BY
Vaisala Oyj
Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
P.O. Box 26, FI-00421 Helsinki, Finland
+358 9 8949 1
Visit our Internet pages at www.vaisala.com.
© Vaisala 2020
No part of this document may be
reproduced, published or publicly
displayed in any form or by any means,
electronic or mechanical (including
photocopying), nor may its contents be
modified, translated, adapted, sold or
disclosed to a third party without prior
written permission of the copyright holder.
Translated documents and translated
portions of multilingual documents are
based on the original English versions. In
ambiguous cases, the English versions are
applicable, not the translations.
The contents of this document are subject
to change without prior notice.
Local rules and regulations may vary and
they shall take precedence over the
information contained in this document.
Vaisala makes no representations on this
document’s compliance with the local
rules and regulations applicable at any
given time, and hereby disclaims any and
all responsibilities related thereto.
This document does not create any legally
binding obligations for Vaisala towards
customers or end users. All legally binding
obligations and agreements are included
exclusively in the applicable supply
contract or the General Conditions of Sale
and General Conditions of Service of
Vaisala.
This product contains software developed
by Vaisala or third parties. Use of the
software is governed by license terms and
conditions included in the applicable
supply contract or, in the absence of
separate license terms and conditions, by
the General License Conditions of Vaisala
Group.
This product may contain open source
software (OSS) components. In the event
this product contains OSS components,
then such OSS is governed by the terms
and conditions of the applicable OSS
licenses, and you are bound by the terms
and conditions of such licenses in
connection with your use and distribution
of the OSS in this product. Applicable OSS
licenses are included in the product itself
or provided to you on any other applicable
media, depending on each individual
product and the product items delivered
to you.
Table of contents
Table of contents
1. About this document.....................................................................................5
1.1 Version information..........................................................................................5
1.2 Related manuals................................................................................................5
1.3 Documentation conventions........................................................................... 5
1.4 Trademarks........................................................................................................6
2. Product overview............................................................................................ 7
2.1 Safety..................................................................................................................7
3. Refractometer connections........................................................................ 8
3.1 Power supply.....................................................................................................8
3.2 mA output..........................................................................................................8
3.3 Cable connections.............................................................................................8
3.3.1 Split cable connections.............................................................................9
3.4 Ethernet connection.......................................................................................10
3.4.1 IP settings for PR-43................................................................................12
3.4.2 IP settings for stand-alone computer....................................................12
3.4.3 Configuring refractometer network.......................................................13
3.4.4 Testing Ethernet connection...................................................................14
3.4.5 Troubleshooting connection...................................................................14
4. Web interface..................................................................................................16
4.1 Main page......................................................................................................... 16
4.2 Diagnostics.......................................................................................................17
4.2.1 Diagnostic values..................................................................................... 18
4.3 Parameters....................................................................................................... 18
4.3.1 Measuring field samples..........................................................................19
4.3.2 Optical image.......................................................................................... 20
4.4 Verification....................................................................................................... 21
5. Startup...............................................................................................................23
5.1 Startup............................................................................................................. 23
5.1.1 Initial check.............................................................................................. 23
5.1.2 mA check..................................................................................................23
5.1.3 Calibration check.....................................................................................23
5.2 Viewing refractometer status........................................................................23
6. Configuration and calibration................................................................. 24
6.1 Configuring refractometer............................................................................ 24
6.1.1 Signal damping........................................................................................24
6.1.2 Configuring mA output.......................................................................... 26
6.1.3 Ethernet speed setting........................................................................... 27
6.1.4 Skip count................................................................................................ 28
6.2 Calibrating concentration measurement.....................................................29
6.2.1 Chemical curve........................................................................................30
6.2.2 Field calibration.......................................................................................30
1
PR-43 Series User Guide M212455EN-B
7. Troubleshooting............................................................................................ 32
7.1 Diagnostic message priorities.......................................................................32
7.2 Hardware......................................................................................................... 32
7.3 Measurement.................................................................................................. 33
8. Principle of measurement.........................................................................35
9. Ethernet protocol specification..............................................................37
9.1 Communication protocol............................................................................... 37
9.1.1 Request format........................................................................................37
9.1.2 Response format..................................................................................... 37
9.1.3 Request and response errors.................................................................38
9.2 Request-response pair specification............................................................38
9.3 Error message specification......................................................................... 40
10. Instrument verification...............................................................................42
10.1 Refractometer verification............................................................................ 42
10.1.1 Handling R.I. liquids................................................................................ 43
10.2 Verification procedure...................................................................................43
10.3 Corrective action............................................................................................45
Appendix A:
PR-43 refractometer field calibration form.....................46
Appendix B: EU declaration of conformity.............................................. 47
Warranty............................................................................................................49
Technical support............................................................................................49
Recycling...........................................................................................................49
2
List of figures
Figure 1 Analogue connection....................................................................................... 8
Figure 2 mA and Ethernet output (with M12 ethernet connector)...................... 9
Figure 3 mA and Ethernet output (with RJ-45 ethernet connector)..................9
Figure 4 RJ45 network connection with Ethernet converter cable
PR-8442............................................................................................................. 10
Figure 5 Three refractometers in the same network............................................... 11
Figure 6 Connecting refractometer(s) via wireless..................................................11
Figure 7 Using fiber link to connect refractometer(s).............................................11
Figure 8 Typical IP configuration for stand-alone laptop
connected to refractometer (laptop WLAN turned o).......................13
Figure 9 Example PR-43 network................................................................................ 13
Figure 10 Pinging address 169.254.43.43; ping returned fully and
connection OK.................................................................................................. 15
Figure 11 Main page...........................................................................................................17
Figure 12 Measurement cycles since last login...........................................................17
Figure 13 Diagnostics page..............................................................................................18
Figure 14 Parameters page..............................................................................................19
Figure 15 Measuring field samples............................................................................... 20
Figure 16 Raw optical image of compact refractometer.........................................21
Figure 17 Raw optical image of probe refractometer.............................................. 21
Figure 18 Verification page.............................................................................................22
Figure 19 Exponential damping.....................................................................................25
Figure 20 Linear damping................................................................................................25
Figure 21 Slew rate damping..........................................................................................26
Figure 22 Default mA output values.............................................................................27
Figure 23 Setting secondary mA default.....................................................................27
Figure 24 Choosing ethernet speed............................................................................. 28
Figure 25 Setting skip count value................................................................................28
Figure 26 Concentration calibration layers.................................................................29
Figure 27 Refractometer principle................................................................................35
Figure 28 Optical images.................................................................................................36
Figure 29 From image detection to concentration...................................................36
Figure 30 Universal sample holder PR-1012................................................................44
List of figures
3
PR-43 Series User Guide M212455EN-B
List of tables
Table 1 Document versions (English)............................................................................. 5
Table 2 PR-43 manuals........................................................................................................5
Table 3 Hardware messages............................................................................................32
Table 4 Measurement messages.................................................................................... 33
Table 5 Request-response pair specification..............................................................39
4
Chapter 1 – About this document
1. About this document
1.1 Version information
This document provides instructions for installing and using the Vaisala K‑PATENTS® Process
Refractometers in the PR‑43 series.
This product manual is delivered to the end user with a Vaisala K‑PATENTS® product.
Information in this manual is subject to change without notice. When the manual is changed, a
revised copy is published at www.kpatents.com.
Table 1 Document versions (English)
Document code Date Description
M212455EN-B April 2020 Manual updated to new format, template, and document code.
IM-ENPR43GEN v.
2.00
June 2018 First version.
1.2 Related manuals
Table 2 PR-43 manuals
Minor changes to content.
Document Code Name
IM-EN-CI Compact User Interface CI Instruction Manual
IM-EN-MI Multichannel User Interface MI Instruction Manual
M212438EN Sanitary Process Refractometer PR-43-AC/AP User Guide
IM-ENPR43GCGP
IM-ENPR43IAAX
Process Refractometer PR-43-GC/GP Instruction Manual
Process Refractometer PR-43-…-IA/AX/CU Instruction Manual
1.3 Documentation conventions
WARNING!
follow instructions carefully at this point, there is a risk of injury or even death.
Warning alerts you to a serious hazard. If you do not read and
5
PR-43 Series User Guide M212455EN-B
CAUTION!
follow instructions carefully at this point, the product could be damaged or
important data could be lost.
Note highlights important information on using the product.
Tip gives information for using the product more eciently.
Lists tools needed to perform the task.
Indicates that you need to take some notes during the task.
Caution warns you of a potential hazard. If you do not read and
1.4 Trademarks
Vaisalaâ and K-PATENTS® are registered trademarks of Vaisala Oyj.
Linuxâ is a registered trademark of Linus Torvalds.
Windowsâ is either a registered trademark or trademark of Microsoft Corporation in the
United States and other countries.
All other product or company names that may be mentioned in this publication are trade
names, trademarks, or registered trademarks of their respective owners.
6
Chapter 2 – Product overview
2. Product overview
The Vaisala K-PATENTS® in-line process refractometer is an instrument for measuring liquid
concentration in the process line. The measurement is based on the refraction of light in the
process medium, an accurate and safe way of measuring liquid concentration. See Principle of
measurement (page 35) for more information on the measurement principle.
PR-43 refractometers come in three standard packages: a stand-alone refractometer with Web
user interface WI, a refractometer with Compact user interface CI and 1-4 refractometers with
Multichannel user interface MI.
The web user interface WI is for direct control system integration in applications where no
industrial computer or monitoring display is required. For more information, see Refractometer
connections (page 8), Startup (page 23) and Web interface (page 16). Compact user
interface provides a local or remote display with the same information as WI (see Compact
User Interface CI Instruction Manual). Multichannel user interface provides high performance
industrial computing e.g. for multiple connectivity and wash control (see Multichannel User
Interface MI Instruction Manual).
2.1
Safety
This product has been tested for safety. Note the following precautions:
WARNING!
must adhere to local and state legislation and regulations.
The process medium may be hot or otherwise hazardous. Use shields and protective clothing
adequate for the process medium. Do not rely on avoidance of contact with the process
medium.
Wear protective eyewear.
Wear protective gloves.
Precautions when removing a sensor from the process line :
• Check that the process line is depressurized and drained
• Loosen the flowcell screws cautiously; be prepared to tighten again
• Ensure you are clear of any possible spillage and you have a clear emergency escape path
Only licensed experts may install electrical components. They
7
PR-43 REFRACTOMETER
M-12-8 pin, A-code, M
non-Ex
max. 200m (656ft)
PR-8680
M12-8 pin, A-code, F
Field plug
PR-8432
Power supply and
mA output cable
F
PR-43 Series User Guide M212455EN-B
3. Refractometer connections
The refractometer has an Ethernet connection for digital data acquisition and configuration.
The standard connection cable is made with an 8-pin industrial M12 connector in the
refractometer end. For more information on the cables, see the manual for your refractometer
model.
3.1 Power supply
The PR-43 refractometer requires a 24 V DC power supply (allowable tolerance is ±10 %). The
current consumption of the refractometer is less than 80 mA. The power supply should be
shielded from external voltage surges.
3.2 mA output
The PR-43 refractometer can be connected with just an mA output. The analogue connection
transmits measurement signal only.
Figure 1 Analogue connection
3.3
Cable connections
If the refractometer is connected with Split cable PR-8431, both mA and Ethernet outputs are
available.
8
10m (33ft)
90m (295ft)
180m (590ft)
PR-43 REFRACTOMETER
M-12-8 pin, A-code, M
non-Ex
PR-43 REFRACTOMETER
M-12-8 pin, A-code, M
non-Ex
PR-43 REFRACTOMETER
M-12-8 pin, A-code, M
non-Ex
max. 90m (295ft) max. 90m (295ft)
max. 90m (295ft)
10m (33ft)
PR-8430
Platform 4 cable
M12-8 pin, A-code, F+M
Ethernet, mA, 24V
PR-8430
Platform 4 cable
M12-8 pin, A-code, F+M
Ethernet, mA, 24V
PR-8430
Platform 4 cable
M12-8 pin, A-code, F+M
Ethernet, mA, 24V
PR-8660
Platform 4 cable extender
M12-8 pin, A-code, F+M
PR-8431
Split cable M12
M12-8 pin, A-code, F
Ethernet (M12-4 pin, D-code,M)
mA, 24V
PR-8431
Split cable M12
M12-8 pin, A-code, F
Ethernet (M12-4 pin, D-code,M)
mA, 24V
1m (3ft)
PR-8431
Split cable M12
M12-8 pin, A-code, F
Ethernet (M12-4 pin, D-code,M)
mA, 24V
1m (3ft)
M
M M
M MM
F
F
F
F
F F
10m (33ft)
90m (295ft)
180m (590ft)
PR-43
REFRACTOMETER
M-12-8 pin, A code, M
Unclassified area
max. 90m (295ft) max. 90m (295ft)
max. 90m (295ft)
PR-8430-___
Platform 4 cable
M12-8 pin, A-code, F+M
Ethernet, mA, 24V
PR-8430-___
Platform 4 cable
M12-8 pin, A-code, F+M
Ethernet, mA, 24V
PR-8430-___
Platform 4 cable
M12-8 pin, A-code, F+M
Ethernet, mA, 24V
PR-8660
Platform 4 cable extender
M12-8 pin, A-code, F+M
PR-8444-001/010
Split cable M12
M12-8 pin, A-code, F
Ethernet (RJ 45)
mA, 24V
1m (3ft) or 10m (33ft)
M
MM
F
F
F
F
PR-8444-001
Split cable M12
M12-8 pin, A-code, F
Ethernet (RJ45)
mA, 24V
1m (3ft)
F
PR-8444-001
Split cable M12
M12-8 pin, A-code, F
Ethernet (RJ45)
mA, 24V
1m (3ft)
F
PR-43
REFRACTOMETER
M-12-8 pin, A code, M
Unclassified area
PR-43
REFRACTOMETER
M-12-8 pin, A code, M
Unclassified area
Chapter 3 – Refractometer connections
Figure 2 mA and Ethernet output (with M12 ethernet connector)
Figure 3 mA and Ethernet output (with RJ-45 ethernet connector)
3.3.1 Split cable connections
In split cables PR-8431 and PR-8444 the power cable and the mA output cable are marked
near the end of the cable.
The power cable includes the following color-coded internal cabling:
9
PR-43 Series User Guide M212455EN-B
• White: +24 DC
• Brown: GND
The mA output cable includes the following color-coded internal cabling:
• White: mA+
• Brown: mA-
3.4 Ethernet connection
The Ethernet connection enables data download from a refractometer to a computer. Any type
of computer, for example PC, Mac or mainframe, with a compatible network connection can be
configured to view and download data from the refractometer. The refractometer can be
configured and monitored without any special software by using a standard web browser.
Ethernet protocol specification (page 37) provides all the specifications necessary to write a
data acquisition program.
The connection on the Split cable PR-8431 is an industrial M12 connector. If
connection to a device that uses RJ45 is desired, for example, to connect with a
laptop, Split cable PR-8444 is needed. Alternatively, you can use Ethernet
converter cable PR-8442.
Figure 4 RJ45 network connection with Ethernet converter cable PR-8442
Several refractometers can be connected to the same Ethernet network. The refractometer
also has an automatic function (known as Auto MDI/MDIX) to detect the polarityof the
network so that the network may utilize either crossover or straight interconnecting cables.
The following figure shows an example of how to connect three refractometers to an existing
LAN with a switch.
10
Hub/Switch
LAN
Ethernet
Ethernet
cable
24 V
DC
24 V
DC
24 V
DC
mA
out
mA
out
mA
out
WLAN
Access
point
Ethernet
24 VDCmA
out
mA
out
24 V
DC
Fiber
Media
converter
Media
converter
Ethernet
Chapter 3 – Refractometer connections
Figure 5 Three refractometers in the same network
It is possible to use a WLAN access point to decrease the number of cables.
Figure 6 Connecting refractometer(s) via wireless
The maximum distance of a single Ethernet connection is 100 m (including one joint adapter/
coupler), but if longer distances are required, a fiber link may be used to extend the range (see
the following figure). The range may be up to several kilometers with a suitable fiber
connection.
Figure 7 Using fiber link to connect refractometer(s)
11
PR-43 Series User Guide M212455EN-B
3.4.1 IP settings for PR-43
All PR-43 refractometers are shipped with the factory default IP address of 169.254.43.43.
This address belongs to the Zeroconf addresses (as defined in IETF standard RFC 3927) so that
it can easily be reached from a stand-alone computer, usually without changing the network
settings of the computer. This address remains in the refractometer even after a dierent IP
address has been set. The refractometer answers in the address that is first called up after
startup.
If there are more than one refractometer in the same network, this address cannot
be used. See Configuring refractometer network (page 13).
The IP address of the refractometer can be changed through the refractometer homepage, see
Web interface (page 16).
3.4.2 IP settings for stand-alone computer
When a computer with automatic IP settings (DHCP enabled) is turned on in a network with
only the refractometer, the computer should automatically obtain an IP address 169.254.x.x. In
this case the factory default address of the refractometer can be used for connecting without
any further changes in settings. If this does not work, make sure that the WLAN (Wireless
network connection) is not active on the computer that is connected to the refractometer. If
the WLAN is active, the computer’s Ethernet connection may not function as expected. Also,
obtaining the 169.254.x.x. address may take up to a minute.
If the connection to the refractometer still cannot be achieved, the computer’s IP address can
be checked by opening the command window (command prompt) and by typingthe
command ipconfigat the command prompt (press ENTER to give the command), see the
figure below (in Mac OS X and Linux the same command is called ifconfig). The
information given includes the computer’s IP address. If the address does not start with
169.254, the IP address of the computer needs to be configured manually to, for example,
169.254.43.44, netmask 255.255.0.0.
For further troubleshooting, see Troubleshooting connection (page 14).
The connection does not work if the computer and the refractometer have exactly
the same IP address.
When the network settings of the refractometer and / or computer have been configured
according to the instructions above, the next step is to test the connection as instructed in
Testing Ethernet connection (page 14).
12
Hub/Switch
IP = 192.168.43.1
IP = 192.168.43.2
IP = 192.168.43.3
IP = 192.168.43.100
netmask = 255.255.255.0
Chapter 3 – Refractometer connections
Figure 8 Typical IP configuration for stand-alone laptop connected to refractometer (laptop WLAN
turned o)
3.4.3 Configuring refractometer network
If there are is than one refractometer in a network, their IP addresses have to be configured
manually as the factory default does not work.
If the refractometer is to be connected to a factory network, consult the network administrator
for the correct settings.
If the network is a stand-alone network with only one refractometer and one or more
computers with no connection to any other network, then the IP addresses can be chosen
rather freely. One possibility is to number the refractometers so that they all have 192.168.43.x
addresses so that every computer and refractometer has a dierent number x between 1 254.
The subnet mask (or netmask) is in this case 255.255.255.0.
Figure 9 Example PR-43 network
There are no settings for subnet mask, default gateway or name servers in the
refractometer, as these settings are not required.
13
PR-43 Series User Guide M212455EN-B
3.4.4 Testing Ethernet connection
When the refractometer is connected to a switch, the corresponding link light illuminates in
the switch.
Once the refractometer is powered up, it should be reachable from any correctly configured
computer. Typing the IP address of the refractometer to the address bar of a web browser
brings up the refractometer homepage, see Web interface (page 16).
The factory-default IP address of the refractometer is 169.254.43.43. This address
always responds, see IP settings for PR-43 (page 12).
3.4.5 Troubleshooting connection
If the refractometer cannot be reached through the network, check the following:
1. The refractometer receives power; the Ethernet switch link light is lit.
2. The network settings of the computer are compatible with those of the refractometer, see
IP settings for stand-alone computer (page 12).
3. If the refractometer should be at IP address 169.254.43.43, but cannot be reached, check
that there is only one refractometer in the same network, as otherwise there is an address
conflict.
4. Check that the software firewall of the computer does not block the connections.
A useful test to determine whether the problem is in network settings is to set up a small
network. Perform the following steps:
1. Set up a network of only one refractometer and one computer.
2. Check that the computer has suitable network settings and that its WLAN connection is
turned o, see IP settings for stand-alone computer (page 12).
3. Use the ping utility of the computer to try and reach the refractometer.
The ping utility is available in Windows systems by using the Command Prompt (usually found
in the Accessories; or open Run, type cmd in the empty line and press ENTER to open
Command Prompt). Go to the command interface, type the name of the command and the IP
address you want to check and press ENTER. If the Ethernet connection is physically working
and the address given to ping is correct, the refractometer answers the ping and return any
data packets sent to it.
14
Chapter 3 – Refractometer connections
Figure 10 Pinging address 169.254.43.43; ping returned fully and connection OK
15
PR-43 Series User Guide M212455EN-B
4. Web interface
Every PR-43 refractometer has a built-in web server with a homepage. The refractometer
homepage allows you to configure, monitor, verify and diagnose the refractometer.
Once a refractometer is connected, the homepage is accessed by simply entering the
refractometer’s IP address into the address bar of the computer’s web browser.
Opening the refractometer homepage:
1. Establish a functioning ethernet connection to the refractometer. For further de- tails, see
Ethernet connection (page 10).
2. Open your preferred web browser (for example Mozilla Firefox, Internet Explorer, Safari,
Edge or Chrome).
3. The address (URL) to access the refractometer’s homepage is the refractometer’s IP
address, which for a factory default set PR-43 it is 169.254.43.43. Type the IP address in
the browser address bar, then “enter”, just as you would enter any other web address (for
example http://www.kpatents.com/)
4. Wait until the homepage is loaded, this may take a few seconds.
The page looks approximately as in Main page (page 16); the exact appearance of the
page depends on your browser and screen settings.
5. Using the links in the link bar at the left side of the page you may access more extensive
refractometer information.
JavaScript support must be enabled in the browser in order for the web pages to
function as intended.
4.1 Main page
Once the refractometer homepage has loaded, it displays all the essential information
regarding the refractometer.
16
Chapter 4 – Web interface
Figure 11 Main page
The main page shows the measurement values, serial number and the tag for the
refractometer. The small numeric display in the bottom right of the page indicates the number
of measurement cycles (one per second) since the last login to the refractometer.
Figure 12 Measurement cycles since last login
4.2
Diagnostics
The Diagnostics page displays the diagnostic values produced by the refractometer. In
addition to the measurement results, the page shows several intermediate results and other
diagnostic values.
The optical images produced by the refractometer can be seen on this page. Both the images
and the diagnostic values are live values, updated with an interval of a few seconds.
17
PR-43 Series User Guide M212455EN-B
Figure 13 Diagnostics page
4.2.1 Diagnostic values
The diagnostic values provide additional information about the measurement.
• CALC is the calculated concentration value without the field calibration adjustment.
• QF or Quality Factor is a value in the range 0 ‑ 200. The QF value depends on process
medium optical properties. A typical good value is 100, but there are process media
where 50 is acceptable. The QF value should stay constant during the process. Falling QF
value may indicate prism coating.
• CCD gives the position of the shadow edge on CCD in %.
• LED is a measure of the amount of light from the light source in %. The value should be
below 100 %.
• BGlight indicates the amount of outside light reaching the CCD. A value above 120
triggers a warning. A value above 240 triggers OUTSIDE LIGHT ERROR.
• Traw is the uncompensated process temperature.
4.3
Parameters
All the refractometer’s functional parameters can be changed using the Parameters page. The
link to the Parameters page is located in the menu displayed on the right- hand side of the
computer display.
18
Chapter 4 – Web interface
Figure 14 Parameters page
Most parameters are changed by deleting the old parameter and writing a new one in the field.
Some, for example the temperature unit, are drop-down lists, click the little triangle on the
right to see the list and to change the parameter. When you have changed a parameter, click
the Submit changes button to apply the changes. The parameter update may take a few
seconds to apply.
If you have edited a parameter but not submitted the change yet, you can undo all changes by
clicking the Undo changes button.
The parameter changes are only saved when you click the Submit changes
button. If you make parameter changes, but go to the Diagnostics page, the
parameters are not changed and you’ll get the old parameters.
4.3.1 Measuring field samples
The Diagnostics page oers a possibility to measure samples for field calibration purposes.
19
PR-43 Series User Guide M212455EN-B
A sample can be measured by clicking the Field point button on the page. After clicking the
button, the refractometer measures the sample ten times and then shows the average and
standard deviation of the measurements. Also the measurement status is shown, and if the
status is not Normal operation, the point is not accepted.
Several points may be measured, and all the points are shown on the page until the page is
reloaded.
Figure 15 Measuring field samples
4.3.2 Optical image
The raw optical image which contains all optical information can be seen by clicking on the
Optical image link on the right side of the Diagnostics page.
20
Figure 16 Raw optical image of compact refractometer
Chapter 4 – Web interface
Figure 17 Raw optical image of probe refractometer
4.4
Verification
Refractometer verification can be performed on this page. Follow the instructions on the
verification page to perform instrument verification. For more information on the verification
procedure, see Instrument verification (page 42).
21
PR-43 Series User Guide M212455EN-B
Figure 18 Verification page
22
Chapter 5 – Startup
5. Startup
5.1 Startup
5.1.1 Initial check
Connect the refractometer, and check that it powers up properly, see Testing Ethernet
connection (page 14). Use a web browser to open the refractometer homepage and check that
the serial number of the refractometer corresponds to that on the refractometer nameplate.
Check the parameters on the Parameters page and adjust them as needed, see Parameters
(page 18). Remember to submit changes.
5.1.2 mA check
Measure the mA output. If the refractometer is not in the line (i.e. message is NO SAMPLE), mA
out sends default mA. The default mA and mA maximum and minimum are set via web
browser on the Parameters page, see Parameters (page 18).
5.1.3 Calibration check
Wait until normal process conditions occur. The concentration reading is precalibrated at
delivery and a copy of the Refractometer calibration certificate is shipped with the
refractometer. If the diagnostic message is Normal operation but the concentration reading
does not agree with the laboratory results, see Calibrating concentration measurement
(page 29).
5.2
Viewing refractometer status
The basic information on the measurements is shown on the Main page of the refractometer,
see Main page (page 16). More information is shown on the Diagnostics page, see Diagnostics
(page 17).
The measurement result is calculated from the refractive index (nD and process temperature
(T) values. Both of these values are on the Main page.
In addition to these measurements, the refractometer monitors its internal temperature and
humidity, which both are available on the Diagnostics page. The internal temperature should
not be above 55 °C, and the humidity should be below 30 %.
23
PR-43 Series User Guide M212455EN-B
6. Configuration and calibration
The following sections describe how to configure the refractometer and calibrate
concentration measurement.
6.1 Configuring refractometer
In PR-43, all parameter changes are made with a web browser through the Parameters page,
see Parameters (page 18).
6.1.1 Signal damping
The system provides the possibility to enter signal damping to diminish the influence of
process noise. The damping is applied to the CONC value (and thus the output signal).
The PR-43 oers the following types of signal damping:
• Exponential (standard) damping works for most processes and is the standard choice for
slow and continuous processes.
• If the process has fast step changes, linear (fast) damping gives shorter settling time.
• Slew rate damping limits the maximum change for the output signal in one second.
The damping time is set separately. What the damping time means in practice, depends on the
damping type:
In 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 seconds for the refractometer
to display concentration 55 %. A damping time of 5 ‑ 15 seconds seems to work best in most
cases.
In linear damping (fast damping), the output is the average of the signal during damping time.
After a step change the signal rises linearly and reaches the final value after the damping time.
The figures below show how the damping time aects the measurement.
The slew rate parameter is presented in output units. For example when the concentration is
measured in percentages, typical slew rate value is 0.05 % to 1 %. It should be noted that the
slew rate limit damping is recommended for random noise suppression as it is non-linear.
The factory setting for damping in PR-43 is 5 s linear. Avoid overdamping, the
signal should not be made insensitive.
The following figures show the eect of damping time on measurement.
24
40
41
42
43
44
45
46
47
48
0 10 20 30 40 50 60 70 80 90 100 110 120
Time [s]
CONC [%]
20 s
10 s
5 s
Figure 19 Exponential damping
40
41
42
43
44
45
46
47
48
0 10 20 30 40 50 60 70 80 90 100 110 120
Time [s]
CONC [%]
30 s
15 s
7 s
Chapter 6 – Configuration and calibration
Figure 20 Linear damping
The following figure shows the eect of slew rate on measurement.
25
PR-43 Series User Guide M212455EN-B
Figure 21 Slew rate damping
6.1.2 Configuring mA output
The mA output values are set on the Parameters page (see section 3.3). Minimum and
maximum values set the measurement range. If your measurement unit is CONC% and you
want to measure the range 15–25 CONC%, the output signal for minimum 15 will be 4 mA and
for maximum 25 it’ll be 20 mA. Default mA sets an mA default output value that the
refractometer returns to in certain situations. The value can be set to a low or high mA value,
e.g. 3.0 mA or 22 mA.
NAMUR is an international association of users of automation in process
industries.The association recommendation NE 43 promotes a standardization of
the signal level for failure information. The goal of NE 43 is to set a basis for
proactively using transmitter failure signals in process control strategies. Using
these failure signals, instrument faults are separated from process measurements.
NAMUR NE 43 uses the 3.8 to 20.5 mA signal range for measurement information, with ≥21 mA
or ≤3.6 mA to indicate diagnostic failures, as shown in the figure below. With that information,
it is easier to detect a failure condition on a refractometer, for example, it clearly tells you
whether you have an empty pipe or a failed instrument.
26
0 3.6
3.8
4
20
20.5
21
mA
failure OK
Measurement Data
failure
Chapter 6 – Configuration and calibration
Figure 22 Default mA output values
The refractometer sends default mA if the message is NO OPTICAL IMAGE, TEMP
MEASUREMENT FAULT, OUTSIDE LIGHT ERROR, NO SAMPLE or PRISM COATED.
An optional secondary mA output default can be set for NO SAMPLE state to dierentiate it
from the other messages that cause the measurement to revert to default mA.
The factory setting for secondary mA default is factory set at Disable. To implement secondary
mA default, go to the mA output calibration section on the parameter page and set secondary
default mode to NO SAMPLE and then set the mA output value desired.
Figure 23 Setting secondary mA default
6.1.3 Ethernet speed setting
For long Ethernet cablings it is recommended to use 10 Mb/s ethernet speed. This can be
selected from the Ethernet settings - Communication speed section on the Parameters page.
The default setting is auto-negotiation.
27
PR-43 Series User Guide M212455EN-B
Figure 24 Choosing ethernet speed
6.1.4 Skip count
When the sample is removed, the refractometer goes to NO SAMPLE state. However, if skip
count is greater than 0, the CONC is frozen to its last value for the number of measurement
cycles (one per second) indicated by skip count.
Skip count is set in Output settings section of the Parameters page.
Figure 25 Setting skip count value
28
LAYER 1
A parameters
Refractometer nD calibration
Chemical curve
Field calibration
LAYER 2
C parameters
LAYER 3
F parameters
mA Output
CCD-camera Pt-1000
mA
nD
CALC
CCD
TEMP
TEMP
CONC
Chapter 6 – Configuration and calibration
6.2 Calibrating concentration measurement
Figure 26 Concentration calibration layers
The concentration calibration is organized in 3 layers:
• Refractometer nD calibration
• Chemical curve
• Field calibration
The advantages of the layer feature are free interchangeability of refractometers, applications
and recipes without any need for mechanical calibration adjustment in the field.
The optical image information is detected by the CCD-element and transformed into a number
(CCD). The process temperature is measured by a Pt-1000 resistance.
29
PR-43 Series User Guide M212455EN-B
Layer 1: The refractometer calibration: The actual refractive index nD is calculated from the
CCD.
Layer 2: The chemical curve: The refractometer calculates the Brix or concentration value
based on nD and TEMP. The result is a temperature compensated calculated concentration
value CALC.
Layer3: Field calibration: Adjustment of the calculated concentration value CALC may be
required in order to compensate for some process conditions or to fit the measurement to the
laboratory results. The field calibration procedure determines the appropriate adjustment to
CALC. The adjusted concentration is called CONC.
Output signal: The output signal is transmitted over the 4–20 mA current output or through
the Ethernet connection.
6.2.1 Chemical curve
The chemical curve is the theoretical concentration curve based on nD and TEMP. It is defined
by a set of 16 parameters.
A chemical curve is specific to the given process medium, for example sucrose or sodium
hydroxide. The set of parameters is given by Vaisala and should not be altered, except in case
of changing to another process medium.
6.2.2 Field calibration
Vaisala provides a field calibration service that adapts the calibration to the factory laboratory
determinations based on the data supplied. The field calibration procedure should be made
under normal process conditions using standard laboratory determinations of sample
concentration.
Record the calibrating data on the PR-43 refractometer field calibration form (page 46), also
available by emailing a request to helpdesk@vaisala.com. Email the completed field calibration
form to either helpdesk@vaisala.com or your local Vaisala K-PATENTS® representative. A
computer analysis of the data is made at Vaisala and optimal calibration parameters are sent
to you to be entered in the system.
For a complete report, 10 ‑ 15 valid data points (see below) are needed. A data point is of use
for calibration only when the diagnostic message is Normal operation.
• LAB%: Sample concentration determined by the user
• CALC: Calculated concentration value
• T: Process temperature measurement in Centigrade
• nD: Actual refractive index n
• CONC: Measurement in concentration units, the large size number
In addition to the calibration data, write down the refractometer serial number.
Accurate calibration is only achieved if the sample is taken correctly. Pay special attention to
following details:
D
30
Chapter 6 – Configuration and calibration
• The sampling valve and the refractometer should be installed close to each other in the
process
WARNING!
Wear protective clothing appropriate to your process when
operating the sampling valve and handling the sample.
• Run the sample before starting to collect data points to avoid sampling old process liquid
that has remained in the sampling valve
• Read the values CALC, T(emp), nD and CONC at exactly the same time with sampling
• Use a tight container for the sample to avoid evaporation
CAUTION!
Oine calibration using process liquid very seldom gives
reliable results, as problems are caused by:
• Low flow which makes sample to form an unrepresentative film on
the prism
• Sample evaporation at high temperature or undissolved solids at
low temperature giving deviations from laboratory determinations
• An ageing sample which is not representative
• Outside light reaching the prism
Calibration using the process liquid must always be made inline.
The concentration measurement value can also be directly adjusted by changing the field
adjustment parameter f00.
The value of the bias parameter f00 will be added to the concentration value:
NEW CONC = OLD CONC + f00.
31
PR-43 Series User Guide M212455EN-B
7. Troubleshooting
The following chapter discusses refractometer error messages and other error conditions. To
view the error messages you need Web user interface WI, Compact user interface CI, or
Multichannel user interface MI. The error messages are visible on the main page/display on the
user interface.
A status message is always shown. However, message Normal operation means
that there are no errors.
7.1 Diagnostic message priorities
The messages are listed in descending order of priority. For example, if both NO
OPTICAL IMAGE and TEMP MEASUREMENT FAULT are activated, only NO
OPTICAL IMAGE displays.
• OUTSIDE LIGHT ERROR
• NO OPTICAL IMAGE
• TEMP MEASUREMENT FAULT
• HIGH SENSOR HUMIDITY
• HIGH SENSOR TEMP
• NO SAMPLE
• PRISM COATED
• OUTSIDE LIGHT TO PRISM
• LOW IMAGE QUALITY
• Normal operation
The following sections list the diagnostic messages, their causes and corrective actions.
7.2
Hardware
The following table describes the hardware messages and their related actions.
Table 3 Hardware messages
Message Description Corrective action
HIGH INTERNAL
HUMIDITY
32
Tells that humidity measured inside
the refractometer exceeds 60 %
relative humidity. The reason may be
moisture leaking in through prism seal
or the cover being open.
Contact Vaisala.
Chapter 7 – Troubleshooting
Message Description Corrective action
HIGH INTERNAL
TEMP
The temperature inside the
refractometer exceeds 65 °C (150 °F).
To read this temperature, go to the
diagnostics page. For more
information, see Diagnostics
(page 17).
See the refractometer specific manual
about choosing mounting location
and cooling the refractometer head. It
is also possible to cool the
refractometer head with a water
cooled cooling cover PR-14038.
7.3 Measurement
The following table describes the measurement messages and their related actions.
Table 4 Measurement messages
Message Description Corrective action
OUTSIDE LIGHT
ERROR or
OUTSIDE LIGHT
TO PRISM
NO OPTICAL
IMAGE
The measurement is not possible or is
disturbed because outside light
reaches the camera.
The prism is heavily coated. Remove sensor from line and clean
There is moisture condensation in the
refractometer.
The refractometer temperature is too
high.
The light source is faulty. When the
refractometer is removed from the
process, the yellow flashing light can
be seen through the prism.
The light is only visible
at an oblique angle.
There are negative spikes in the
optical image. The probable cause is
contamination on the optical path.
The CCD card in the refractometer is
faulty.
Identify the light source and block the
light from getting to the prism at the
sensor tip. The amount of outside
light can be seen at BGlight on the
Diagnostics page.
prism manually.
See Hardware (page 32).
Check the LED value on the
Diagnostics page. For more
information, see Diagnostics
(page 17).
If the value is clearly below 100, LED
fault is not likely.
If the value is above 100, contact
Vaisala.
Contact Vaisala.
33
PR-43 Series User Guide M212455EN-B
Message Description Corrective action
PRISM COATED The optical surface of the prism is
LOW IMAGE
QUALITY
NO SAMPLE The operation of the equipment is OK
TEMP
MEASUREMENT
FAULT
coated by the process medium or
impurities in the process medium.
The most likely cause for this message
is coating on the prism. There still is
an optical image available, but the
measurement quality may not be
optimal.
but there is no process liquid on the
prism. In some cases this message
may also be caused by coating on the
prism.
Indicates faulty temperature element. Contact Vaisala.
Remove refractometer from line and
clean prism manually.
If the problem is recurrent, consider
improving the flow conditions (see
refractometer specific manual for
choosing mounting location).
Automatic prism wash may also be a
solution.
A dierence to some
other process
temperature
measurement is not a
fault. The
refractometer shows
the true temperature
of the prism surface.
Concentration
drift during
Normal operation
34
For drift upward or downwards to
zero, cause is likely the prism coating.
Remove sensor from line and clean
prism manually.
If the problem is recurrent, consider
improving the flow conditions (see
refractometer specific manual for
choosing mounting location).
L
P
MM
S
A C B
Chapter 8 – Principle of measurement
8. Principle of measurement
The Vaisala K-PATENTS® inline refractometer determines the refractive index nD 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 (hence nD). Light from the light source (L) in
the figure below is directed to the interface between the prism (P) and the process medium
(S). Two of the prism surfaces (M) act as mirrors bending the light rays so that they meet the
interface at dierent angles.
Figure 27 Refractometer principle
The reflected rays of light form an image (ACB), where (C) is the position of the critical angle
ray. The rays at (A) are totally internally reflected at the process interface, the rays at (B) are
partially reflected and partially refracted into the process solution. In this way the optical
image is divided into a light area (A) and a dark area (B). The position of the shadow edge (C)
indicates the value of the critical angle. The refractive index nD can then be determined from
this position.
35
B B
C
C
A A
Low concentration High concentration
PR-43 Series User Guide M212455EN-B
The refractive index nD 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 figure
below. The color of the solution, gas bubbles or undissolved particles do not aect the
position of the shadow edge (C).
Figure 28 Optical images
The position of the shadow edge is measured digitally using a CCD element and is converted
to a refractive index value nD by a processor inside the instrument. This value is used together
with the measured process temperature to calculate the concentration.
Figure 29 From image detection to concentration
36
Chapter 9 – Ethernet protocol specification
9. Ethernet protocol specification
The main purpose of the Ethernet connection is to collect measurement data from the
refractometer. For this data acquisition, you’ll need to have suitable software on your
computer. You can program a data acquisition program yourself following the specifications
below.
For examples and ready-made applications, contact Vaisala.
9.1 Communication protocol
The communications protocol is based on UDP/IP to port 50023. It is a client/server protocol,
where the refractometer is the server and thus only sends information when the client (your
computer) requests it. The server should answer to all requests within 100 ms.
9.1.1 Request format
The client to server communication, i.e. the requests sent from your computer to the
refractometer, is in binary format. The request packets contain the following binary data (all
integers are in the network order, MSB first):
• 32-bit integer: packet number
• 32-bit integer: request ID
• (any): request data (depends on the request)
• (any): fill-indata
The maximum size of the message is 1472 octets(bytes).
The packet number is echoed back by the refractometer, but not processed in any way.
The packet numbers do not have to be sequential, any 32-bit value is valid.
The request ID is a 32-bit value that identifies the requested function, for example
refractometer information. See Request-response pair specification (page 38) for request IDs.
The request data consists of 0 to 1464 octets of additional data associated with the request.
The fill-indata can be used to increase the number of octets in a message. Any number of
NULL characters (0x00) may be added to the end of the request as long as the total size of
the message does not exceed the maximum of 1472 octets. This may be useful, for example, if
the client implementation uses fixed-length packets.
9.1.2 Response format
The response data sent by the refractometer is in ASCII format. With the exception of the
packet number, the data is human-readable. The data structure is very simple:
37
PR-43 Series User Guide M212455EN-B
• Packet number (32-bit integer)
• Zero or more lines of ASCII (text) keys and values associated with these keys (for example
temperature key and process temperature in Celsius)
The packet number is echoed back without change. The client (software on computer) can
use the packet number to check the response against the packet number of the request.
The message text consists of lines of text, each line a single key (of one word) and its value or
values. The values are separated from the key by an equal sign ( = ) and multiple values are
separated by a comma. White space (space or tabulator) is allowed anywhere except within a
single value or key name.
If the response consists of a character string, it is enclosed in double quotes ("). For example,
all these are valid message text lines:
ok
temp = 23.45
StatusMessage = "Normal Operation"
All the key identifiers, see Request-response pair specification (page 38), are
case- insensitive. However, it is recommended that they are written as in this
specification.
The server (refractometer) may send the response keys in any order. The server sends the
mandatory keys of the specific request, marked with an asterisk in Request-response pair
specification (page 38), but it may omit any other keys. The server may also send keys that
are not specified in this document, but the client (computer) may ignore them.
9.1.3 Request and response errors
When the server (refractometer) detects an error, it responds with an error message. For more
information, see Error message specification (page 40). An error message can be caused, for
example, by an unknown request or inability to collect data for the mandatory keys of a
response.
9.2
Request-response pair specification
The following table describes the query messages, i.e. request-response pairs, used for data
collection using the Ethernet connection.
Those response keys that are always sent are preceded by an asterisk (*).
38
Chapter 9 – Ethernet protocol specification
Table 5 Request-response pair specification
Specification Description Request ID Request data Response key
NULL
message
Included in query messages
for debugging purposes as it
can be used to check
0x00000000(none) • IP: IP address
• MAC: Ethernet
MACaddress
whether the server is
listening. The message gives
a high-level 'ping'
functionality.
Protocol
version
Responded to with a value
representing the server
(refractometer) protocol
0x00000001 (none) *Version: integer, the
server protocol
version (currently 3)
version.
Refractomete
r information
Gives the basic information
of the refractometer.
0x000000030x0000000
0: always
zero
• *SensorSerial:
string,
refractometer
serial number
• *SProcSerial:
string, processor
card serial number
• *SensorVersion:
string, version
number of the
refractometer
software
• mASerial : string,
mA interface card
serial number
• mAVersion : string,
mA interface card
software version
39
PR-43 Series User Guide M212455EN-B
Specification Description Request ID Request data Response key
Measurement
results
Gives the measured and
calculated measurement
values from the
refractometer.
0x000000040x0000000
0: always
zero
• Status : string,
refractometer
status message
• LED : float, LED
value
• CCD : float, image
shadow edge
position
• nD : float,
calculated nD value
• T : float, process
temperature
• Tsens : float,
refractometer
internal
temperature
• Traw : float,
process
temperature
(without bias)
• RHsens : float,
internal humidity
• CALC : float,
calculated
concentration
value
• CONC : float, final
concentration
value
• PTraw : integer,
PT1000 value
• QF : float, image
quality factor
• mA : float, mA
output value
• BGlight : integer,
background light
level
• Seq : integer,
sequence number
of measurement
• Timestamp :
integer, time since
device start-up
9.3
Error message specification
If the server (refractometer) does not recognize the request or cannot fulfill it, it responds with
an error message. The error message has the following keys:
40
Chapter 9 – Ethernet protocol specification
• *Error : integer, error code 0x00000000 : Unknown request
• *Error : integer, error code 0x00000001 : Invalid request (request recognized, invalid
request data)
• *Error : integer, error code 0x00000002 : Invalid refractometer number
• ErrorMsg : string, error details
There may also be error-dependent extra keys. Other error codes may be returned.
0x00000003is to be handled as unknown request. Codes with higher numbers refer to
internal errors; contact Vaisala for more information on these.
41
PR-43 Series User Guide M212455EN-B
10. Instrument verification
Th following sections describe the process and steps for refractometer verification, and the
corrective actions necessary.
10.1 Refractometer verification
The verification of the PR-43 calibration is made using a set of standard refractive index
liquids. In order to perform a valid verification, at least three liquids need to be used. The
verification is valid only within the refractive index range defined by these three liquids.
The instrument recognizes automatically the following refractive index standard liquids (the
values are stated at +25 °C):
• 1.3200
• 1.3300
• 1.3400
• 1.3500
• 1.3600
• 1.3700
• 1.3800
• 1.3900
• 1.4000
• 1.4100
• 1.4200
• 1.4300
• 1.4400
• 1.4500
• 1.4600
• 1.4700
• 1.4800
• 1.4900
• 1.5000
• 1.5100
• 1.5200
The accuracy of the certified standard refractive index liquids is ±0.0002 and they can
betraced back to NIST standards # 1823 and # 1823 II. As the specified accuracy of the PR-43is
±0.0002, then the representative level is the sum of the two accuracy specifications, that is
±0.0004.
Vaisala provides a set of standard R.I. liquids, PR-2300, containing five selected liquids (1.3300,
1.3700, 1.4200, 1.4700, 1.5200). The set can be ordered from Vaisala. Other liquids are available
on request.
42
Chapter 10 – Instrument verification
10.1.1 Handling R.I. liquids
Use gloves and safety glasses or goggles. Make sure the ventilation is good, local ventilationis
preferable. Please review the safety instructions and the MSDS shipped with the liquids (valid
inside R.I. range 1.30-1.57, safety markings valid in EU/EEA areas). Do not put tissues or liquid
bottles in household waste, dispose of waste according to local regulations for chemical waste.
10.2 Verification procedure
The instrument verification can be performed by using the web interface on the instrument
verification page, see Verification (page 21). The standard liquids are placed on the prism as
instructed by the instructions on the screen. Once the liquid hassettled, sample is measured by
clicking the New verification point button.
The liquids are automatically detected, and the quality of the measurement is
constantlymonitored throughout the process. If the same liquid is measured several times, new
result will replace the older one. A single measurement point can be removed by clicking the
Remove button.
The verification result is shown on the page. Please note that reloading the page removes all
points. After measuring a sucient number of points the verification may be saved by clicking
the Save verification button.
In order to avoid verification errors, please make sure:
• The temperature has settled, i.e., the refractometer is in the ambient temperature
• The temperature of the refractometer is between 20 °C and 30 °C
• The prism is cleaned properly before placing thesample
• The test liquid wets the prism properly
The temperature of the refractometer can be checked by following the temperature
measurement on the Verification page. The temperature should be constant.
The sample holder keeps the sample on the prism surface and also blocks the ambient light
from reaching the prism. The universal sample holder PR-1012 can be used with any Vaisala KPATENTS refractometer.
43
PR-43 Series User Guide M212455EN-B
Figure 30 Universal sample holder PR-1012
The optical image displayed on the page helps determining whether the prism is wetted
completely. The image should have a sharp corner as in Figure 18 (page 22).
The position of the corner depends on the refractive index
A soft image may indicate improper cleaning of the prism. Also, if there is not enough liquid on
the prism, the image tends to flatten. If the image changes its shape during the measurement
of a single liquid, please redo the measurement. The most likely reason is that the liquid leaks
from the sample holder.
After a sample has been measured, remove the sample and clean the prism and the sample
holder. The prism can be cleaned by soft tissue and ethanol or other suitable solvent. Repeat
the procedure (cleaning, replacing the sample, measuring) for each nD liquid. In case you
perform the procedure more than once for a single sample, the latest measurement will
replace earlier measurements.
The table on the verification page keeps a real time record of the points measured and the
status (pass/fail) of the verification. If you have a failed point, you may either remove it or
remeasure it.
Once all liquids have been measured, the verification can be saved by clicking the Save
verification button. Please note that the button is only available after a sucient number of
points has been measured.
The limit for acceptance is that all measurements must be within ±0.0004 of the nominal
values.
44
The refractometer verification concerns only the refractive index nD measurement.
The calculation of concentration from nD and process temperature TEMP is not
included, see Configuration and calibration (page 24).
Chapter 10 – Instrument verification
10.3 Corrective action
If the verification is not passed, first check that the prism and the sample holder are absolutely
clean and the sample holder sits tightly on the refractometer tip before a standard liquid is
applied. Make sure the standard liquids are in good condition and not past their expiration
date. Also, inspect the prism surface, checking that it is flat and shiny without any scratches,
digs or deposition on it.
Repeat the verification procedure. If the verification still fails, print out (or photograph) the
verification report. Send the data to helpdesk@vaisala.com or your nearest Vaisala K-PATENTS
representative and wait for further instructions.
45
PR-43 Series User Guide M212455EN-B
Appendix A. PR-43 refractometer field
calibration form
Fill in this form and email it to helpdesk@vaisala.com or to your local service representative.
Refractometer serial no:
Refractometer model:
Customer:
Address:
Email:
Sample description:
Solvent (water/other):
Laboratory method:
Date:
Data collected by:
Sample no.
For more information, see Field calibration (page 30).
46
LAB% CALC T n
D
CONC
Appendix B. EU declaration of conformity
2019-09-01J/JAMO
1 (1)
Vaisala Oyj | PO Box 26, FI-00421 Helsinki, Finland
Phone +358 9 894 91 | Fax +358 9 8949 2227
Email firstname.lastname@vaisala.com | www.vaisala.com
Domicile Vantaa, Finland | VAT FI01244162 | Business ID 0124416-2
EU DECLARATION OF CONFORMITY
Manufacturer: Vaisala Oyj
Mail address: P.O. Box 26, FI-00421 Helsinki, Finland
Street Address: Vanha Nurmijärventie 21, Vantaa, Finland
This declaration of conformity is issued under the sole responsibility of the manufacturer.
Object of the declaration:
K-Patents Process Refractometer PR-43 series
The object of the declaration described above is in conformity with Directives:
RoHS Directive (2011/65/EU)
EMC Directive (2014/30/EU)
The conformity is declared using the following standards:
EN 50581:2012
Technical documentation for the assessment of electrical and
electronic products with respect to the restriction of hazardous s ubstances
EN 61010-1:2010
Safety requirements for el ectrical equipment for measurement,
control and laboratory use – Part 1: General requirements
EN 61326-1:2013 Electrical equipment for measurement, control and laboratory
use – EMC requirements – intended for us
e in industrial locations
Signed for and on behalf of Vaisala Oyj, in Vantaa, on 1
st
September 2019
______________________________________
Jukka Lyömiö
Standards and Approvals Manager
Appendix B – EU declaration of conformity
47
Warranty
For standard warranty terms and conditions, see www.vaisala.com/warranty.
Please observe that any such warranty may not be valid in case of damage due to normal wear
and tear, exceptional operating conditions, negligent handling or installation, or unauthorized
modifications. Please see the applicable supply contract or Conditions of Sale for details of the
warranty for each product.
Technical support
Contact Vaisala technical support at helpdesk@vaisala.com. Provide at least the
following supporting information as applicable:
• Product name, model, and serial number
• Software/Firmware version
• Name and location of the installation site
• Name and contact information of a technical person who can provide further
information on the problem
For more information, see www.vaisala.com/support.
Recycling
Recycle all applicable material.
Follow the statutory regulations for disposing of the product and packaging.
49
www.vaisala.com
Loading...