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

[phone]

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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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

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		E„ect 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

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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.
		Minor changes to content.
IM-EN-PR33AC-	September	First version.
A	2019

1.2 Documentation conventions

WARNING! Warning alerts you to a serious hazard. If you do not read and follow instructions carefully at this point, there is a risk of injury or even death.

CAUTION! Caution warns you of a potential hazard. If you do not read and 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 eˆciently.

Lists tools needed to perform the task.

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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! Only licensed experts may install electrical components. They 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.

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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 di„erent 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.

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Ethernet

cable

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.

Ethernet cable

Hub/Switch	Ethernet
	cable	LAN

Figure 3 Three refractometers in the same network

It is possible to use a WLAN access point to decrease the number of cables.

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Access

point

WLAN

Ethernet cable

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.

Media	Fiber	Media
converter		converter	Ethernet
			cable

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 di„erent 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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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 diˆculties 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).

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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 di„erent number x between 1. 254. The subnet mask (or netmask) is in this case 255.255.255.0.

IP = 192.168.33.3	IP = 192.168.33.100
	netmask = 255.255.255.0

IP = 192.168.33.2
IP = 192.168.33.1	Hub/Switch

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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•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

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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! If the process pipe vibrates, support the pipe. A vibrating pipe can 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 suˆcient air cooling if the air gets to flow freely around the refractometer head.

CAUTION! Always mount the refractometer so that the interconnecting cable points downwards from the refractometer head.

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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- 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 a„ect the measurement and need to be taken into account.

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