Vaisala PR-33-AC User Manual
M212411EN-B
User Guide
Sanitary OEM Refractometer
PR-33-AC
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 Oyj 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 Documentation conventions........................................................................... 5
1.3 Trademarks........................................................................................................ 6
2. Product overview............................................................................................ 7
2.1 Vaisala Sanitary OEM Refractometer PR-33-AC........................................... 7
2.2 Safety..................................................................................................................7
2.3 Regulatory compliances...................................................................................8
3. Instrument connections................................................................................9
3.1 Power supply.....................................................................................................9
3.2 mA output..........................................................................................................9
3.3 Ethernet connection.........................................................................................9
3.3.1 Ethernet specification...............................................................................9
3.3.2 IP settings for Sanitary OEM Refractometer..........................................11
3.3.3 IP settings for stand-alone computer....................................................12
3.3.4 Configuring refractometer network.......................................................13
3.3.5 Testing Ethernet connection...................................................................13
3.3.6 Troubleshooting connection...................................................................13
4. Refractometer mounting............................................................................ 15
4.1 Choosing refractometer mounting location.................................................15
4.2 Checklist for pipe mounting...........................................................................15
4.3 Refractometer wiring......................................................................................18
5. Startup and use.............................................................................................20
5.1 Startup.............................................................................................................20
5.1.1 Initial check..............................................................................................20
5.1.2 Calibration check.................................................................................... 20
5.2 Viewing refractometer status....................................................................... 20
6. Instrument homepage................................................................................. 21
6.1 Main page......................................................................................................... 21
6.2 Diagnostics......................................................................................................22
6.2.1 Measuring field samples.........................................................................23
6.2.2 Optical image...........................................................................................24
6.3 Parameters...................................................................................................... 25
6.4 Verification......................................................................................................26
7. Configuration and calibration..................................................................28
7.1 Configuring refractometer............................................................................ 28
7.1.1 Signal damping........................................................................................28
7.1.2 Skip count................................................................................................ 29
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PR-33-AC User Guide M212411EN-B
7.2 Calibrating concentration measurement..................................................... 29
7.2.1 Chemical curve......................................................................................... 31
7.2.2 Field calibration........................................................................................ 31
7.2.3 Direct BIAS adjustment.......................................................................... 32
7.3 Default mA output value............................................................................... 32
8. Instrument verification...............................................................................34
8.1 Refractometer verification............................................................................ 34
8.1.1 Handling R.I. liquids................................................................................ 34
8.2 Verification procedure................................................................................... 35
8.3 Verification report...........................................................................................37
8.4 Corrective action............................................................................................ 38
9. Maintenance....................................................................................................39
10. Troubleshooting............................................................................................40
10.1 Diagnostic message priorities...................................................................... 40
10.2 Hardware.........................................................................................................40
10.3 Measurement..................................................................................................40
11. Specifications.................................................................................................43
11.1 PR-33-AC model code................................................................................... 43
11.2 Mounting specifics for EHEDG certified PR-33-AC configuration............46
12. Ethernet protocol specification..............................................................47
12.1 Communication protocol...............................................................................47
12.1.1 Request format........................................................................................47
12.1.2 Response format..................................................................................... 47
12.1.3 Request and response errors.................................................................48
12.2 Request-response pair specification...........................................................49
12.3 Error message specification......................................................................... 50
13. Principle of measurement.......................................................................... 51
Appendix A:
EU declaration of conformity..............................................53
Appendix B: Refractometer field calibration form.................................54
Warranty............................................................................................................ 55
Technical support............................................................................................ 55
Recycling...........................................................................................................55
2
List of figures
Figure 1 Sanitary OEM Refractometer PR‑33‑AC......................................................7
Figure 2 Simple network configuration......................................................................10
Figure 3 Three refractometers in the same network..............................................10
Figure 4 Connecting refractometer(s) via wireless..................................................11
Figure 5 Using fiber link to connect refractometer(s).............................................11
Figure 6 Typical stand-alone IP configuration..........................................................12
Figure 7 A network of Sanitary OEM Refractometers............................................13
Figure 8 Pinging address 169.254.23.33.....................................................................14
Figure 9 Sensor configuration.......................................................................................17
Figure 10 Output options..................................................................................................17
Figure 11 Sanitary OEM Refractometer connectors................................................. 18
Figure 12 Wiring drawing.................................................................................................19
Figure 13 Main page.......................................................................................................... 22
Figure 14 Diagnostics page.............................................................................................23
Figure 15 Measuring field samples................................................................................24
Figure 16 Optical image................................................................................................... 25
Figure 17 Parameters page.............................................................................................26
Figure 18 Verification page............................................................................................. 27
Figure 19 Eect of damping time on measurement with linear damping.........28
Figure 20 Calibration layers............................................................................................30
Figure 21 NAMUR NE 43 signal ranges........................................................................33
Figure 22 Verification page.............................................................................................36
Figure 23 Universal sample holder PR-1012................................................................37
Figure 24 Verification report...........................................................................................38
Figure 25 Refractometer principle................................................................................. 51
Figure 26 Optical images................................................................................................. 52
Figure 27 Optical image detection................................................................................52
List of figures
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PR-33-AC User Guide M212411EN-B
List of tables
Table 1 Document versions (English)............................................................................5
Table 2 Chemical curve parameters..............................................................................31
Table 3 Hardware messages..........................................................................................40
Table 4 Measurement messages....................................................................................41
Table 5 SANITARY OEM REFRACTOMETER for pipelines (3-A
Sanitary Standard 46-04 Certified)..............................................................43
Table 6 SANITARY OEM REFRACTOMETER for pipelines (3-A
Sanitary Certified and EHEDG certified)..................................................... 43
Table 7 Elbow Flow Cells for PR-33-AC......................................................................44
Table 8 EHEDG Certified Elbow Flow Cells, connection Sanitary
3A-clamp 2½ inch.............................................................................................. 45
Table 9 Mounting hardware for PR-33-AC.................................................................46
Table 10 Request-response pair specification............................................................49
4
Chapter 1 – About this document
1. About this document
1.1 Version information
This document provides instructions for installing, using and maintaining the Vaisala
K‑PATENTS® Sanitary OEM Refractometer PR‑33‑AC.
Table 1 Document versions (English)
Document Code Date Description
M212411EN-B February 2020 Manual updated to new format, template, and document code.
IM-EN-PR33AC-ASeptember
2019
1.2 Documentation conventions
Minor changes to content.
First version.
WARNING!
follow instructions carefully at this point, there is a risk of injury or even death.
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.
Warning alerts you to a serious hazard. If you do not read and
Caution warns you of a potential hazard. If you do not read and
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PR-33-AC User Guide M212411EN-B
Indicates that you need to take some notes during the task.
1.3 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.
Varivent® is a registered trademark of GEA Tuchenhagen GMBH.
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
2.1 Vaisala Sanitary OEM Refractometer PR-33-AC
The inline Sanitary OEM Refractometer PR–33–AC measures the refractive index nD and the
temperature of the process medium. The concentration of the process liquid is calculated from
these values when the main components of the process medium are known.
The output values of the sensor are transmitted through a 4 … 20 mA output and an Ethernet
connection by using a UDP/IP protocol. For more information, see Ethernet protocol
specification (page 47). An optional mA output unit is also available, if more than one current
output is required.
Figure 1 Sanitary OEM Refractometer PR‑33‑AC
2.2
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.
Only licensed experts may install electrical components. They
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PR-33-AC User Guide M212411EN-B
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
2.3 Regulatory compliances
This product complies with the following performance and environmental test standards:
• 3-A
• EHEDG
8
Chapter 3 – Instrument connections
3. Instrument connections
The instrument has three dierent connections: power supply (+24 Vdc), 4 … 20 mA current
output, and an Ethernet connection for digital data acquisition and configuration.
These connections are grouped into two connectors so that one of the connectors carries both
the power supply and the current output. The other connector is an Ethernet connection.
Both connections use the industrial M12 connector. The Ethernet connector has the industry
standard M12-Ethernet pin-out. The power supply and current output use an A-coded M12
male on the instrument side. The Ethernet connection uses a D-coded female connector on the
instrument side.
For the wiring details, see Refractometer wiring (page 18).
3.1 Power supply
The Sanitary OEM Refractometer requires a 24 V DC power supply (allowable tolerance is
±10 %). The current consumption of the refractometer is less than 100 mA. Shield the power
supply from external voltage surges.
3.2
mA output
The mA output of the refractometer supplies voltage and it is galvanically isolated. The
compliance (maximum resistive load) for the output is 1000 Ω.
3.3
Ethernet connection
The Ethernet connection enables data download from a Sanitary OEM Refractometer to a
computer. Any type of computer (PC, Mac, PDA, mainframe) with a compatible network
connection can be configured to view and download data from the refractometer.
The Sanitary OEM Refractometer can be configured and monitored without any special
software by using a standard web browser. Ethernet protocol specification (page 47) gives
all the specifications necessary to write a data acquisition program.
3.3.1 Ethernet specification
The Sanitary OEM Refractometer is designed to be connected to a network with a standard
Ethernet cable. The cable supplied with the instrument has an industrial M12 connector in the
instrument and a RJ-45 connector in the other end. The maximum communication speed of
the refractometer is 100 Mbit/s (Ethernet 100BASE-T). In the simplest form the network
consists of one refractometer and one computer. The following figure shows the configuration.
9
Ethernet
cable
Hub/Switch
LAN
Ethernet
cable
Ethernet
cable
PR-33-AC User Guide M212411EN-B
Figure 2 Simple network configuration
Several refractometers can be connected to the same Ethernet network. The Sanitary OEM
Refractometer also has an automatic function (known as Auto MDI/MDIX) to detect the
polarity of the network so that the network may utilize either cross-over or straight
interconnecting cables.
The following figure shows an example of how to connect three refractometers to an existing
LAN with a switch.
Figure 3 Three refractometers in the same network
It is possible to use a WLAN access point to decrease the number of cables.
10
WLAN
Access
point
Ethernet
cable
Fiber
Media
converter
Media
converter
Ethernet
cable
Chapter 3 – Instrument connections
Figure 4 Connecting refractometer(s) via wireless
The maximum distance of a single Ethernet connection is 100 m (incl. one joint adapter/
coupler), but if longer distances are required, a fiber link may be used to extend the range as
shown in the followinf figure. The range may be up to several kilometers with a suitable fiber
connection.
Figure 5 Using fiber link to connect refractometer(s)
3.3.2 IP settings for Sanitary OEM Refractometer
All Sanitary OEM Refractometers are shipped with the factory default IP address of
169.254.23.33. 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 instrument even after a dierent IP address has been set. The
sensor answers in the address that is first called up after startup.
If there is more than one Sanitary OEM Refractometer in the same network, this
address cannot be used. For more information, see Configuring refractometer
network (page 13).
Change the IP address of the instrument through the instrument homepage. For more
information, see Instrument homepage (page 21).
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PR-33-AC User Guide M212411EN-B
3.3.3 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 automatically obtains the 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. Obtaining the
169.254.x.x. address may take up to a minute.
If you still have diculties connecting to the refractometer, check the computer’s IP address by
opening the command window (command prompt) and by typing the command ipconfig
(press ENTER to give the command). 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, configure the IP address of the computer manually to 169.254.23.34,
netmask 255.255.0.0.
For further troubleshooting, see Troubleshooting connection (page 13).
The following figure shows an example IP configuration for a stand-alone laptop when
connected to the refractometer. The laptop wireless (WLAN) is turned o.
Figure 6 Typical stand-alone IP configuration
The connection does not work if the computer and the refractometer have exactly
the same IP address.
When the network settings of the instrument (and/or the computer) have been configured
according to the instructions above, the next step is to test the connection as instructed in
Testing Ethernet connection (page 13).
12
Hub/Switch
IP = 192.168.33.1
IP = 192.168.33.2
IP = 192.168.33.3
IP = 192.168.33.100
netmask = 255.255.255.0
Chapter 3 – Instrument connections
3.3.4 Configuring refractometer network
If there is more than one Sanitary OEM Refractometer in a network, configure their IP
addresses manually as the factory defaults do not work.
If the Sanitary OEM 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 Sanitary OEM 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 instruments so that they all have
192.168.33.x addresses so that every computer and instrument has a dierent number x
between 1. 254. The subnet mask (or netmask) is in this case 255.255.255.0.
Figure 7 A network of Sanitary OEM Refractometers
There are no settings for subnet mask, default gateway or name servers in the
Sanitary OEM Refractometer, as these settings are not required.
3.3.5 Testing Ethernet connection
When the Sanitary OEM Refractometer is connected to a switch, the corresponding link light
illuminates in the switch.
Once the refractometer is powered up, it is reachable from any correctly configured computer.
Typing the IP address of the instrument to the address bar of a web browser should bring up
the instrument homepage. For more information, see Instrument homepage (page 21).
The factory-default IP address of the Sanitary OEM Refractometer is
169.254.23.33. This address always responds. For more information, see IP
settings for Sanitary OEM Refractometer (page 11).
3.3.6 Troubleshooting connection
If the instrument cannot be reached through the network, check the following:
• The instrument receives power; the ethernet switch link light is lit.
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PR-33-AC User Guide M212411EN-B
• The network settings of the computer are compatible with those of the instrument; for
more information, see IP settings for stand-alone computer (page 12).
• If the instrument should be at IP address 169.254.23.33, but cannot be reached, check that
there is only one Sanitary OEM Refractometer in the same network, as otherwise there is
an address conflict.
• 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:
• Set up a network of only one Sanitary OEM Refractometer and one computer.
• Check that the computer has suitable network settings and that its WLAN connection is
turned o; for more information, see IP settings for stand-alone computer (page 12).
• 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).
To use ping 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 returns any data
packets sent to it.
Figure 8 Pinging address 169.254.23.33
14
Chapter 4 – Refractometer mounting
4. Refractometer mounting
Choose the Sanitary OEM Refractometer mounting location with care to ensure reliable
readings from the process.
4.1 Choosing refractometer mounting location
The mounting location must be such that sediments or gas bubbles cannot accumulate by the
refractometer. Good flow velocity is essential in keeping the prism clean.
CAUTION!
damage the in-line refractometer mounted on it.
The refractometer cover should not be exposed to high temperature radiation. In most cases,
draft and natural convection provide sucient air cooling if the air gets to flow freely around
the refractometer head.
CAUTION!
points downwards from the refractometer head.
If the process pipe vibrates, support the pipe. A vibrating pipe can
Always mount the refractometer so that the interconnecting cable
4.2 Checklist for pipe mounting
Most Sanitary OEM Refractometers are mounted in a pipe. The recommended flow velocity is
between 1 and 3 m/s (3 … 10 ft/s). If the flow velocity exceeds 6 m/s (20 ft/s), there is a risk of
cavitation. Cavitation may damage the sensor and the piping. Too slow a flow velocity may
cause erroneous measurement readings due to coating of stratification (layering) of the
sample on the prism.
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PR-33-AC User Guide M212411EN-B
- Upper pipe bend
- Cable downwards
- High velocity (>1.5 m/s [5 ft/s])
- High temperature
- High pressure
- Easy access
The diameter and form of the pipe and the process temperature all aect the measurement
and need to be taken into account.
16
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