Vaisala PR-43-AC, PR-43-AP User Manual
M212438EN-C
User Guide
Sanitary Process Refractometer
PR-43-AC/AP
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.
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 Vaisala Sanitary Process Refractometers PR‑43‑AC and PR‑43‑AP...........7
2.2 Safety..................................................................................................................7
3. Installation..........................................................................................................9
3.1 Choosing mounting location........................................................................... 9
3.2 Checklist for pipe mounting............................................................................ 9
3.3 Checklist for mounting in tank, vessel or large pipe...................................10
3.4 Mounting guide.................................................................................................11
3.5 Electrical connections.....................................................................................12
4. Prism wash........................................................................................................16
4.1 Prism coating...................................................................................................16
4.2 Prism wash.......................................................................................................16
4.2.1 Recommended wash pressures and times............................................17
4.2.2 Prism wash systems.................................................................................18
4.2.3 Prism wash nozzles................................................................................. 22
5. Technical data................................................................................................ 25
5.1 Compatibility...................................................................................................25
5.2 Refractometer rangeability........................................................................... 25
5.3 Sanitary process refractometer PR-43-AC..................................................25
5.3.1 PR-43-AC model code............................................................................26
5.3.2 PR-43-AC mounting hardware model code.........................................28
5.3.3 PR-43-AC specifications.........................................................................32
5.3.4 PR-43-AC parts list................................................................................. 34
5.3.5 PR-43-AC mounting specifics................................................................37
5.3.6 Mounting specifics for EHEDG certified PR-43-AC configuration....44
5.3.7 3-A Sanitary Standard compliance.......................................................44
5.4 Sanitary process refractometer PR-43-AP................................................. 46
5.4.1 PR-43-AP model code............................................................................ 47
5.4.2 PR-43-AP mounting hardware model code........................................ 49
5.4.3 PR-43-AP specifications........................................................................ 50
5.4.4 PR-43-AP parts lists................................................................................52
5.4.5 PR-43-AP mounting specifics................................................................55
5.4.6 Mounting specifics for EHEDG certified PR-43-AP configuration.... 58
5.4.7 3-A Sanitary Standard compliance.......................................................59
Appendix A:
Refractometer verification.................................................. 60
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PR-43-AC/AP User Guide M212438EN-C
Appendix B: PR-43 refractometer verification form..............................62
Appendix C: EU declaration of conformity..............................................63
Warranty............................................................................................................65
Technical support............................................................................................65
Recycling...........................................................................................................65
2
List of figures
Figure 1 Refractometer models..................................................................................... 7
Figure 2 PR-43-AC and PR-43-AP mounting guide.................................................11
Figure 3 The M12 connector...........................................................................................12
Figure 4 Connecting refractometer cable to refractometer.................................13
Figure 5 Wiring with analogue output only.............................................................. 13
Figure 6 Wiring options with both analogue and digital outputs...................... 14
Figure 7 Wiring options with both analogue and digital outputs
and RJ45 ethernet connector.......................................................................14
Figure 8 Connections in M12 and RJ-45 connectors...............................................15
Figure 9 Prism wash system for steam.......................................................................19
Figure 10 Wiring for prism wash system for steam................................................. 20
Figure 11 Prism wash system for high pressure water.............................................21
Figure 12 Wiring for prism wash system for high pressure water........................22
Figure 13 Wash nozzles for flowcell AFC-HSS-XXX-XX-NC................................... 22
Figure 14 Process connection of wash nozzle in flowcell.......................................24
Figure 15 PR-43-AC rangeability...................................................................................25
Figure 16 PR-43-AC dimensions....................................................................................26
Figure 17 Refractometer cover assembly................................................................... 34
Figure 18 PR-43-AC assembly....................................................................................... 36
Figure 19 Mounting with sanitary ferrule, pipe diameter 80 mm
(3 in) or more....................................................................................................37
Figure 20 Flow cell AFC-HSS-H10 for pipe diameter 25 mm (1 in)
and H15 for pipe diameter 40 mm (1.5 in)................................................38
Figure 21 Flow cell AFC-HSS- with wash nozzle connection (-NC)
H10 for pipe diameter 25 mm (1 in) and H15 for pipe
diameter 40 mm (1.5 in)................................................................................39
Figure 22 Flow cell AFC-HSS-H20 for pipe diameter 50 mm (2 in)
and H25 for pipe diameter 65 mm (2.5 in)..............................................40
Figure 23 Flow cell AFC-HSS- with wash nozzle connection (-NC)
H20 for pipe diameter 50 mm (2 in) and H25 for pipe
diameter 65 mm (2.5 in)................................................................................ 41
Figure 24 Side flow cells.................................................................................................. 42
Figure 25 I-Line fitting for PR-43-AC........................................................................... 43
Figure 26 Mounting with sanitary ferrule, pipe diameter 80 mm
(3 in) or more EHEDG certified configuration........................................ 45
Figure 27 Dimensions of an inserted refractometer PR-43-AP-H25-L170........ 46
Figure 28 Flush mounted refractometer PR-43-AP-T10-L00................................47
Figure 29 Refractometer cover assembly....................................................................52
Figure 30 PR-43-AP assembly....................................................................................... 54
Figure 31 Insertion of probe refractometer PR-43-AP-H25.................................. 56
Figure 32 Flush mounting probe refractometer PR-43-AP-T10-L100.................57
Figure 33 I-Line fitting for PR-43-AP............................................................................58
Figure 34 EHEDG certified PR-43-AP...........................................................................59
Figure 35 Universal sample holder PR-1012............................................................... 60
List of figures
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PR-43-AC/AP User Guide M212438EN-C
List of tables
Table 1 Document versions (English)...........................................................................5
Table 2 Related manuals.................................................................................................. 5
Table 3 Wash medium parameters for integral wash nozzles in PR-43-AP......17
Table 4 Wash medium parameters for flowcell wash nozzle AFC.......................17
Table 5 Flowcell -H10 or -H15........................................................................................23
Table 6 Flowcell -H20 or -H25......................................................................................23
Table 7 Flowcell -H30......................................................................................................23
Table 8 Flowcell -H40..................................................................................................... 23
Table 9 Prism wash nozzle selection.......................................................................... 24
Table 10 Sanitary compact refractometer for pipelines..........................................27
Table 11 Mounting hardware without wash nozzles................................................28
Table 12 EHEDG certified mounting hardware..........................................................28
Table 13 Mounting hardware with wash nozzles.......................................................29
Table 14 Mounting hardware, mini flow cell............................................................... 30
Table 15 Mounting hardware, Varivent DN65 connection......................................30
Table 16 Mounting hardware........................................................................................... 31
Table 17 PR-43-AC specifications..................................................................................32
Table 18 Refractometer cover assembly parts list....................................................34
Table 19 PR-43-AC assembly parts list........................................................................36
Table 20 I-Line fitting for PR-43-AC............................................................................. 43
Table 21 Mounting materials...........................................................................................45
Table 22 SANITARY PROBE REFRACTOMETER for large pipelines
and vessels..........................................................................................................47
Table 23 SANITARY PROBE REFRACTOMETER with prism wash
for large pipelines and vessels......................................................................49
Table 24 Mounting hardware for PR-43-AP refractometer....................................50
Table 25 PR-43-AP specifications.................................................................................50
Table 26 Refractometer cover assembly parts list....................................................52
Table 27 PR-43-AP assembly parts list........................................................................54
Table 28 Verification results display..............................................................................62
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® Sanitary
Process Refractometers PR‑43‑AC and PR‑43‑AP.
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
M212438EN-C April 2020 Manual updated to new format, template, and document
IM‑EN‑PR43ACAP
2.00
IM‑EN‑PR43ACAP
1.12
September
2019
June 2018 IP rating updated.
1.2 Related manuals
code. Minor changes to content.
Changed K-Patents to Vaisala.
Table 2 Related manuals
Document Code Name
M212455EN Sanitary Process Refractometer PR-43 Series User Guide
IM-EN-MI Multichannel User Interface MI Instruction Manual
IM-EN-CI Compact User Interface CI Instruction Manual
IM-EN-PR43IAAX 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-AC/AP User Guide M212438EN-C
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.
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 Process Refractometers
PR‑43‑AC and PR‑43‑AP
The sanitary refractometers PR‑43‑AC and PR‑43‑AP provide a digital interface detection
system for alimentary industry.
The PR‑43‑AC/AP 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
composition of the process medium is known.
The output values of the refractometer are transmitted through mA output and digitally
through an Ethernet connection by using a UDP/IP protocol (for specification see PR-43
general manual). mA output is available with mA output cable (mA only) or with a split cable
(mA and Ethernet).
Figure 1 Refractometer models
2.2
Safety
This product has been tested for safety. Note the following precautions:
WARNING!
must adhere to local and state legislation and regulations.
Only licensed experts may install electrical components. They
7
PR-43-AC/AP User Guide M212438EN-C
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
8
Chapter 3 – Installation
3. Installation
3.1 Choosing mounting location
The refractometer mounting location should be chosen with care to ensure reliable readings
from the process.
The mounting location needs to be such that sediments or gas bubbles cannot accumulate by
the refractometer. Good flow velocity is essential in keeping the prism clean.
CAUTION!
might damage the inline refractometer mounted on it.
A Vaisala K‑PATENTSâ inline refractometer can be located either indoors or outdoors in most
climates. However, when a refractometer is located outdoors, some basic protection against
direct exposure to sunlight and rain should be provided. Special care should be taken if the
pipe wall is translucent (e.g. of fiberglass), as light from outside reaching the prism through the
pipe wall may disturb the measurement.
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.
Additional cooling is necessary when the ambient temperature is higher than 45 °C (113 °F) or
when the process temperature is above 110 °C (230 °F) and the ambient temperature is above
35 °C (95 °F). The air cooling is improved by blowing pressurized air against the refractometer
cover. The pressurized air can be supplied by the ventilation system. It is also possible to
mount a PR‑14038 cooling cover for cooling with water.
CAUTION!
points downwards from the refractometer head.
If the process pipe vibrates, support the pipe. A vibrating pipe
Always mount the refractometer so that the interconnecting cable
3.2 Checklist for pipe mounting
The PR‑43‑AC and PR‑43‑AP are mounted in a pipe. Vaisala recommends a flow velocity
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 refractometer and the piping. Too slow a flow velocity
may cause erraneous measurement readings due to coating of stratification (layering) of the
sample on the prism.
The diameter and form of the pipe and the process temperature all aect the measurement
and need to be taken into account.
• If the process pipe diameter varies, select the position with the smallest diameter(and
accordingly highest velocity). Then the prism stays clean better.
9
PR-43-AC/AP User Guide M212438EN-C
• If the refractometer is used in a feed-back control loop, make the time lag short. E.g. when
a dilution valve is controlled, mount the refractometer close to the dilution point.
However, make sure complete mixing has occurred at mounting location.
• If the temperature varies along the process pipe, select the position with the highest
process temperature. That minimizes the risk of coating, because higher temperature
means higher solubility and also lower viscosity.
• Often the position with the highest process pressure (= after pump + before valve) has
favorable flow conditions without sedimentation or air trapping risks.
• The refractometer should be conveniently accessible for service.
3.3 Checklist for mounting in tank, vessel or large pipe
A probe refractometer PR‑43‑AP can be inserted with a flange or clamp into tanks and vessels
which either don’t have a scraper or where the mixer doesn’t touch the vessel wall. A probe
refractometer can also be flush mounted in a cooker where the scraper touches the wall.
• The inserted probe refractometer is mounted close to a stirrer to ensure representative
sample of the process liquid and to keep the prism clean.
• The refractometer should be conveniently accessible for service.
10
3.4 Mounting guide
Prevent outside light
Easy access
Easy access
High pressure
High temperature
High pressure
Small diameter
High temperature
High velocity >1.5m/s
(>5ft/s)
Upper pipe bend
Ambient air
cooling
Chapter 3 – Installation
Figure 2 PR-43-AC and PR-43-AP mounting guide
11
PR-43-AC/AP User Guide M212438EN-C
3.5 Electrical connections
The refractometer has an M12 connector in the refractometer for power supply, mA output and
Ethernet connections.
Figure 3 The M12 connector
PR-43 refractometers are powered with 24 VDC. For connecting the refractometer to
Multichannel user interface MI, see the Instruction manual for Multichannel User Interface MI.
For connecting the refractometer to Compact user interface CI, see the Instruction manual for
Compact User Interface CI. See the following figure for instruction how to connect the M12
refractometer cable.
12
Turn to tighten
Align groove and
guide
P4-031
Connector screw thread
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
Chapter 3 – Installation
Figure 4 Connecting refractometer cable to refractometer
The PR-43 refractometer provides both analog (mA) and digital output signals. See the
following figure for the wiring when only analog output is used.
Figure 5 Wiring with analogue output only
The following figure shows the options for connecting the refractometer with both analog and
digital outputs. Both Compact user interface CI and Multichannel user interface MI use the
digital output signal.
13
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
Unclassied 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-43
REFRACTOMETER
M-12-8 pin, A code, M
Unclassied area
PR-43
REFRACTOMETER
M-12-8 pin, A code, M
Unclassied area
PR-43-AC/AP User Guide M212438EN-C
Figure 6 Wiring options with both analogue and digital outputs
The following figure shows the wiring options when both analogue and digital outputs are
used, with RJ45 ethernet connector.
Figure 7 Wiring options with both analogue and digital outputs and RJ45 ethernet connector
14
Chapter 3 – Installation
Figure 8 Connections in M12 and RJ-45 connectors
In split cables the power cable and the mA output cable are marked near the end of the cable.
Power cable:
• White: +24DC
• Brown: GND
mA output cable:
• White: mA+
• Brown: mA-
15
PR-43-AC/AP User Guide M212438EN-C
4. Prism wash
Prism wash requires a system for wash control and diagnostics. This can be achieved with
Multichannel user interface (MI) with a relay module.
4.1 Prism coating
Deposit build-up on the prism surface disturbs the measurement. Anabnormally high
concentration reading, an upward concentration (CONC) drift, decreased QF value or increased
LED value may indicate coating.
In most applications the prism will keep clean due to the self-cleaning eect. If coating occurs,
check the following:
• Sucient flow velocity
• A temperature dierence between the process fluid and refractometer probe may cause
coating. This may happen with small flows if the thermal insulation is inadequate. In some
cases it helps to also insulate the clamp connector.
In case of a coating problem, the preferred solution is to try to increase the flow velocity, for
example, by installing a pipe portion with smaller diameter.
Installing a wash nozzle can be considered, if increasing the velocity does not provide a
solution. For more information, see Prism wash (page 16).
4.2
Prism wash
Three alternative wash media can be used for prism wash:
• Steam
• Water
• High pressure water
Relay modules in a Multichannel user interface MI can be configured to control the prism wash
cycle, see MI manual, Chapter 6, "Module cards" and Chapter 7, "Prism wash".
CAUTION!
culinary steam or safe water. Shut-o valve and check valve must meet 3-A
sanitary standards.
Culinary steam: Means steam produced using a system meeting criteria in the 3-A Accepted
Practices for a Method of Producing Steam of a Culinary Quality, Number 609.
Safe Water: Means water from a supply properly located, protected, and operated, and shall be
of safe, sanitary quality. The water shall meet the standards prescribed in the National Primary
Drinking Water Regulation of the Environmental Protection Agency (EPA) as referenced in The
Code of Federal Regulations (CFR), Title 40, Parts 141, 142, and 143.
16
Important: In food industry applications, wash medium must be
4.2.1 Recommended wash pressures and times
The following tables provide the recommended wash pressures and times.
Table 3 Wash medium parameters for integral wash nozzles in PR-43-AP
Chapter 4 – Prism wash
Minimum above
process pressure
Maximum above
process pressure
Wash
time
RecoveryInterval
Steam (SN) 2 bar (30 psi) 4 bar (60 psi) 3 s 20 ‑ 30 s 20 ‑ 30
min
Water (WN) 2 bar (30 psi) 4 bar (60 psi) 10 s 20 ‑ 30 s 10 ‑ 20 m
in
High pressure water
(WP)
15 bar (220 psi) 40 bar (600 psi) 10 s 20 ‑ 30 s 10 ‑ 20 m
in
Table 4 Wash medium parameters for flowcell wash nozzle AFC
Minimum above
process pressure
Maximum above
process pressure
Wash
time
RecoveryInterval
Steam (SN) 3 bar (45 psi) 6 bar (90 psi) 3 ‑ 5 s 20 ‑ 30 s 20 ‑ 30
min
Water (WN) 3 bar (45 psi) 6 bar (90 psi) 10 ‑ 15 s 20 ‑ 30 s 10 ‑ 20 m
in
High pressure water
(WP)
CAUTION!
25 bar (350 psi) 35 bar (500 psi) 10 ‑ 15 s 20 ‑ 30 s 10 ‑ 20 m
in
In steam wash, do not exceed the recommended wash times,
because some process media may burn to the prism surface if steamed for
longer time. In case of coating, shorten the wash interval.
In water wash, water temperature should be above the process temperature.
The check valve pressure drop is 0.7 bar (10 psi).
17
PR-43-AC/AP User Guide M212438EN-C
4.2.2 Prism wash systems
WARNING!
closed pipe section when the high pressure pump is operated. It is
recommended to mount a pressure relief valve in the pipe section. Relief
pressure should be according to pipe pressure rating.
The following figures describe the prism wash system for steam.
In high pressure wash systems, pressure increase can occur in a
18
Chapter 4 – Prism wash
Figure 9 Prism wash system for steam
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