K-Patents PR-43 Series User manual

Process Refractometer PR-43
Document/Revision No. IM-EN-PR43GEN: Rev. 1.03
Effective: September 20, 2016
Instruction Manual

Document/Revision No. IM-EN-PR43GEN/1.03 Effecve: September 20, 2016
General safety consideraons
The process medium may be hot or otherwise hazardous. Use shields and
protecve clothing adequate for the process medium - do not rely on avoid-
ance of contact with the process medium.
Precauons when removing a refractometer from the process line :
•Check first that the process line is depressurized and drained.
•Ensure you are clear of any possible spillage and you have a clear emer-
gency escape path.
Disposal
When wishing to dispose of an obsolete refractometer or any parts of a
refractometer, please observe local and naonal regulaons and require-
ments for the disposal of electrical and electronic equipment.

Symbols and terms used in this manual:
This indicates a warning. It provides safety precauon informaon needed to
avoid injury while operang the refractometer system.
This indicates that something is important for the operaon of the refractome-
ter system.
Note. Notes contain addional informaon and hints.
Warranty
All K-Patents products are guaranteed to be free of material or workmanship defects.
K-Patents provides a limited warranty that covers the repair or replacement, without
charge, of any defected product or part that occurs within two (2) years from the date
of delivery. The repair can only be done by nearest authorized K-Patents repair facility.
K-Patents is not responsible for material selecon of process weed parts.
Warranty does not cover normal wear and tear of the product over me, or any prod-
ucts that are handled, installed or used against manufacturer’s guidance.
Full warranty informaon is available in the Support secon of hp://www.kpatents.com.
Please note that prior to shipping any products or items to K-Patents, a Request for
Return Materials Authorizaon (RMA) must be filled in and submied to K-Patents
Order Handling department. The RMA form is available at hp://www.kpatents.com/
in the Support secon.

Table of contents
1 Introducon ................................................... 1
2 Refractometerconnecons ....................................... 2
2.1 Power supply ............................................ 2
2.2 mA output .............................................. 2
2.3 Ethernet connecon ...................................... 4
2.3.1 IP sengs for the PR-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3.2 IP sengs for a stand-alone computer . . . . . . . . . . . . . . . . . . . . . . 6
2.3.3 Configuring a network of refractometers . . . . . . . . . . . . . . . . . . . . 7
2.3.4 Tesng the Ethernet connecon . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3.5 Troubleshoong the connecon . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Webinterface ................................................. 10
3.1 Main page ............................................. 11
3.2 Diagnoscs ............................................ 12
3.3 Parameters ............................................ 12
3.3.1 Measuring field samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3.2 Opcal image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 Verificaon ............................................ 16
4 Startup ...................................................... 17
4.1 Startup ................................................ 17
4.1.1 Inial check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1.2 mA check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1.3 Calibraon check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Viewing refractometer status .............................. 17
5 Configuraon and calibraon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Configuring the refractometer ............................. 19
5.1.1 Signal damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1.2 Configuring mA output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2 Calibrang the concentraon measurement . . . . . . . . . . . . . . . . . . 22
5.2.1 The chemical curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2.2 Field calibraon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

© Copyright K-Patents 2016. All rights reserved.
6 Troubleshoong ............................................... 25
6.1 Hardware .............................................. 25
6.1.1 Message HIGH SENSOR HUMIDITY . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.1.2 Message HIGH SENSOR TEMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.2 Measurement ........................................... 25
6.2.1 Message OUTSIDE LIGHT ERROR or OUTSIDE LIGHT TO PRISM . . . 25
6.2.2 Message NO OPTICAL IMAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2.3 Message PRISM COATED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2.4 Message LOW IMAGE QUALITY . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2.5 Message NO SAMPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2.6 Message TEMP MEASUREMENT FAULT . . . . . . . . . . . . . . . . . . . . . 27
6.2.7 Concentraon dri during NORMAL OPERATION . . . . . . . . . . . . . . 27
6.3 Diagnosc messages table ................................. 28
7 Principleofmeasurement ....................................... 29
8 Ethernet protocol specificaon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.1 Communicaon protocol .................................. 31
8.1.1 Request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.1.2 Response format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.1.3 Request and response errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.2 Request-response pair specificaon ......................... 33
8.2.1 NULL message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.2.2 Protocol version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.2.3 Refractometer informaon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2.4 Measurement results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.3 Error message specificaon ................................ 34
A PR-43 refractometer field calibraon form . . . . . . . . . . . . . . . . . . . . . . . . . . 35
B EU declaraon of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

PR-43 instrucon manual
Document/Revision No. IM-EN-PR43GEN/1.03 Effecve: September 20, 2016

1 Introducon 1
© Copyright K-Patents 2016. All rights reserved.
1 Introducon
The K-Patents in-line process refractometer is an instrument for measuring liquid con-
centraon in the process line. The measurement is based on the refracon of light in
the process medium, an accurate and safe way of measuring liquid concentraon. See
Chapter 7 for more informaon on the measurement principle.
The PR-43 refractometers come in three standard packages: a stand-alone refractome-
ter with Web user interface WI, a refractometer with Compact user interface CI and 1-4
refractometers with Mulchannel user interface MI.
Web user interface WI is for direct control system integraon in applicaons where no
industrial computer or monitoring display is required (see Chapters 2, 4 and 3). Com-
pact user interface provides a local or remote display with the same informaon as
WI (See Compact user interface CI manual). Mulchannel user interface provides high
performance industrial compung e.g. for mulple connecvity and wash control (see
Mulchannel user interface MI manual).

2PR-43 instrucon manual
Document/Revision No. IM-EN-PR43GEN/1.03 Effecve: September 20, 2016
2 Refractometer connecons
The refractometer has an Ethernet connecon for digital data acquision and configu-
raon. The standard connecon cable is made with an 8-pin industrial M12 connector
in the refractometer end. For more informaon on the cables, see the manual for your
refractometer model.
2.1 Power supply
The PR-43 refractometer requires a 24 V DC power supply (allowable tolerance is
±10 %). The current consumpon of the refractometer is less than 80 mA. The power
supply should be shielded from external voltage surges.
2.2 mA output
The PR-43 refractometer can be connected with just mA output. The analogue connec-
on transmits measurement signal only.
10m (33ft)
90m (295ft)
180m (590ft)
200m (656ft)
P4-001
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
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)
max. 200m (656ft)
PR-8680
M12-8 pin, A-code, F
Field plug PR-8432
Power supply and
mA output cable
Refractometer only Cables
M
M M
M MM
F
F
F
F
F
F F
Figure 2.1 Analogue connecon
If the refractometer is connected with Split cable PR-8431, both mA and Ethernet out-
puts are available.

2 Refractometer connecons 3
© Copyright K-Patents 2016. All rights reserved.
10m (33ft) 90m (295ft) 180m (590ft) 200m (656ft)
P4-001
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 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)
max. 200m (656ft)
PR-8680
M12-8 pin, A-code, F Field plug PR-8432
Power supply and mA output cable
Refractometer only Cables
M
M M
M MM
F F F F
F
F F
Figure 2.2 mA and Ethernet output

4PR-43 instrucon manual
Document/Revision No. IM-EN-PR43GEN/1.03 Effecve: September 20, 2016
2.3 Ethernet connecon
The Ethernet connecon enables data download from a refractometer to a computer.
Any type of computer (PC, Mac, mainframe...) with a compable network connecon
can be configured to view and download data from the refractometer. The refractome-
ter can be configured and monitored without any special soware by using a standard
web browser. Chapter 8 gives all the specificaons necessary to write a data acquision
program.
The connecon on the Split cable PR-8431 is an industrial M12 connector. If connecon
to a device that uses RJ45 is desired e.g. to connect with a laptop, Ethernet converter
cable PR-8442-001 is needed.
Figure 2.3 RJ45 network connecon
Several refractometers can be connected to the same Ethernet network. Also, the re-
fractometer has an automac funcon (known as Auto MDI/MDIX) to detect the po-
larity of the network so that the network may ulize either cross-over or straight inter-
connecng cables.
Figure 2.4 shows an example of how to connect three refractometers to an exisng LAN
with a switch.

2 Refractometer connecons 5
© Copyright K-Patents 2016. All rights reserved.
Hub/Switch
LAN
Ethernet Ethernet
cable
24 V
DC
24 V
DC
24 V
DC mA
out
mA
out
mA
out
Figure 2.4 Three refractometers in the same network.
It is possible to use a WLAN access point to decrease the number of cables (figure 2.5).
WLAN
Access
point
Ethernet
24 V
DC mA out
Figure 2.5 Connecng refractometer(s) via wireless.
The maximum distance of a single Ethernet connecon is 100 m (incl. one joint
adapter/coupler), but if longer distances are required, a fiber link may be used to
extend the range (see figure 2.6). The range may be up to several kilometers with a
suitable fiber connecon.
mA
out
24 V
DC
Fiber
Media
converter
Media
converter
Ethernet
Figure 2.6 Using fiber link to connect refractometer(s).

6PR-43 instrucon manual
Document/Revision No. IM-EN-PR43GEN/1.03 Effecve: September 20, 2016
2.3.1 IP sengs for the 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 sengs of the computer. This address will remain in the refractometer
even aer a different IP address has been set. The refractometer answers in the address
that is first called up aer startup.
Note: If there are more than one refractometer in the same network, this address
cannot be used (secon 2.3.3).
The IP address of the refractometer can be changed through the refractometer home-
page (see Chapter 3).
2.3.2 IP sengs for a stand-alone computer
When a computer with automacal IP sengs (DHCP enabled) is turned on in a network
with only the refractometer, the computer should automacally obtain an IP address
169.254.x.x. In this case the factory default address of the refractometer can be used
for connecng without any further changes in sengs. If this does not work, make
sure that the WLAN (Wireless network connecon) is not acve on the computer that
is connected to the refractometer. If the WLAN is acve, the computer’s Ethernet con-
necon may not funcon as expected. Also, obtaining the 169.254.x.x. address may
take up to a minute.
If the connecon to the refractometer sll cannot be achieved, the computer’s IP ad-
dress can be checked by opening the command window (command prompt) and by
typing the command ipconfig at the command prompt (press Enter to give the com-
mand), see Figure 2.7 (in Mac OS X and Linux the same command is called ifconfig).
The informaon given will include the computer’s IP address. If the address does not
start by 169.254, the IP address of the computer needs to be configured manually to
e.g. 169.254.43.44, netmask 255.255.0.0.
For further troubleshoong, see secon 2.3.5.
Note: The connecon will not work if the computer and the refractometer have exactly
the same IP address.

2 Refractometer connecons 7
© Copyright K-Patents 2016. All rights reserved.
Figure 2.7 Typical IP configuraon for a stand-alone laptop when
connected to a refractometer; laptop wireless (WLAN) is turned off
When the network sengs of the refractometer (and/or the computer) have been con-
figured according to the instrucons above, the next step is to test the connecon as
instructed below in Secon 2.3.4.
2.3.3 Configuring a network of refractometers
In case there are more than one refractometer in a network, their IP addresses have to
be configured manually as the factory default will not work.
If the refractometer is to be connected to a factory network, consult the network ad-
ministrator for the correct sengs.
If the network is a stand-alone network with only one refractometer and one or more
computers with no connecon 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 different
number x between 1...254. The subnet mask (or netmask) is in this case 255.255.255.0.
(see figure 2.8).
Note: There are no sengs for subnet mask, default gateway or name servers in the
refractometer, as these sengs are not required.

8PR-43 instrucon manual
Document/Revision No. IM-EN-PR43GEN/1.03 Effecve: September 20, 2016
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
Figure 2.8 A network of PR-43s.
2.3.4 Tesng the Ethernet connecon
When the refractometer is connected to a switch, the corresponding link light should
light up in the switch.
Once the refractometer is powered up, it should be reachable from any correctly con-
figured computer. Typing the IP address of the refractometer to the address bar of a
web browser should bring up the refractometer homepage (see Chapter 3).
Note: The factory-default IP address of the refractometer is 169.254.43.43. This ad-
dress should always respond (see secon 2.3.1).
2.3.5 Troubleshoong the connecon
In case the refractometer cannot be reached through the network, check the following
things:
1. the refractometer receives power; the Ethernet switch link light is lit.
2. the network sengs of the computer are compable with those of the refractome-
ter (secon 2.3.2)
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 soware firewall of the computer does not block the connecons

2 Refractometer connecons 9
© Copyright K-Patents 2016. All rights reserved.
A useful test to determine whether the problem is in network sengs 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 sengs and that its WLAN connec-
on is turned off (secon 2.3.2)
3. use the ping ulity of the computer to try and reach the refractometer.
The ping ulity menoned above is available in Windows systems by using the Com-
mand Prompt (usually found in the Accessories; or open Run, type cmd in the empty
line and press enter to open Command Prompt). The usage of ping is very simple: 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 connecon is physically working and the ad-
dress given to ping is correct, the refractometer will answer to ping and return any data
packets sent to it, see figure 2.9.
Figure 2.9 Pinging address 169.254.23.33,
ping returned fully and connecon ok.

10 PR-43 instrucon manual
Document/Revision No. IM-EN-PR43GEN/1.03 Effecve: September 20, 2016
3 Web interface
Every PR-43 refractometer has a built-in web server with a homepage. The refractome-
ter 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 funconing ethernet connecon to the refractometer. For further de-
tails, refer to secon 2.3.
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 hp://www.kpatents.com/)
4. Wait unl the homepage is loaded, this may take a few seconds.
The page looks approximately as in Figure 3.1; the exact appearance of the page
will depend on which browser you are using and also screen sengs.
5. Using the links in the link bar at the le side of the page you may access more
extensive refractometer informaon.
Important: The JavaScript support must be enabled in the browser, in order for the
web pages to funcon as intended.

3 Web interface 11
© Copyright K-Patents 2016. All rights reserved.
3.1 Main page
Once the refractometer homepage has loaded, it will display all the essenal informa-
on regarding the refractometer.
Figure 3.1 Main page
The main page shows the measurement values, serial number and the tag for the re-
fractometer. The small numeric display in the boom right of the page indicates the
number of measurement cycles (one per second) since the last login to the refractome-
ter.
Figure 3.2 Measurement cycles
since last login

12 PR-43 instrucon manual
Document/Revision No. IM-EN-PR43GEN/1.03 Effecve: September 20, 2016
3.2 Diagnoscs
The Diagnoscs page (Figure 3.3) displays the diagnosc values produced by the refrac-
tometer. In addion to the measurement results, the page shows several intermediate
results and other diagnosc values.
The opcal images produced by the refractometer can be seen on this page. Both the
images and the diagnosc values are live values, updated with an interval of a few
seconds.
Figure 3.3 Diagnoscs page
3.3 Parameters
All the refractometer’s funconal 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.

3 Web interface 13
© Copyright K-Patents 2016. All rights reserved.
Figure 3.4 Parameter page
Most parameters are changed by deleng the old parameter and wring a new one in
the field. Some, like e.g. temperature unit, are drop-down lists, click the lile triangle
on the right to see the list and to change the parameter. When you have changed
a parameter, click the Submit changes buon to apply the changes. The parameter
update may take a few seconds to apply.
If you have edited a parameter but not submied the change yet, you can undo all
changes by clicking the Undo changes buon. Note: The parameter changes are only
saved when you click the Submit changes buon. If you make parameter changes, but
e.g. go to the Diagnoscs page, the parameters are not changed and you’ll get the old
parameters.

14 PR-43 instrucon manual
Document/Revision No. IM-EN-PR43GEN/1.03 Effecve: September 20, 2016
3.3.1 Measuring field samples
The diagnoscs page (Figure 3.3) offers a possibility to measure samples for field cali-
braon purposes.
A sample can be measured by clicking the Field point buon on the page. Aer clicking
the buon the refractometer will measure the sample ten mes and then it shows the
average and standard deviaon of the measurements. Also the measurement status is
shown, and if the status is not Normal operaon, the point will not be accepted.
Several points may be measured, and all the points are shown on the page unl the
page is reloaded.
Figure 3.5 Measuring field samples