YOKOGAWA FLXA21 Installation and operation manual

User’s
Manual
TM
TM
Model FLXA202 / FLXA21
2-Wire Analyzer
Start-up Manual
IM 12A01A02-12E
IM 12A01A02-12E
9th Edition
This Start-up Manual explains mainly the installation and wiring of the FLXA202/FLXA21.
For detailed information and other information, the User’s Manual of the FLXA202/FLXA21
should be referred to.

i
IM 12A01A02-12E 9th Edition : Mar. 23, 2018-00
uIntroduction
Thank you for purchasing the FLXATM202/FLXATM21 2-Wire Analyzer.
Please read the following respective documents before installing and using the FLXA202/
FLXA21.
When the FLXA21 with the output of FOUNDATION Fieldbus or PROFIBUS PA Communication
is used, please refer to the User’s Manual, IM 12A01A02-71E or IM 12A01A02-72E, too.
The related documents are as follows.
General Specications
Contents Document number Note
FLXA202 2-wire Analyzer GS 12A01A03-01EN
These are included In attached CD-ROM
FLXA21 2-wire Analyzer GS 12A01A02-01E
FLXA21 2-wire Analyzer
FOUNDATION Fieldbus Communication GS 12A01A02-71E
FLXA21 2-wire Analyzer
PROFIBUS PA Communication GS 12A01A02-72E
* the “E” or “EN” in the document number is the language code.
User’s Manual
Contents Document number Note
FLXA202/FLXA21
Start-up Manual IM 12A01A02-12E This manual
Attached to the product
FLXA202/FLXA21
Safety Precautions IM 12A01A02-20E Attached to the product
Note
FLXA202/FLXA21
User’s Manual IM 12A01A02-01E
These are included In attached CD-ROM
FLXA21
FOUNDATION Fieldbus Communication IM 12A01A02-71E
FLXA21
PROFIBUS PA Communication IM 12A01A02-72E
* the “E” in the document number is the language code.
Note: Please read the Safety Precautions (IM 12A01A02-20E) before using the product.
 TheSafetyPrecautionsincludesControlDrawingsofintrinsicsafety,nonincendiveandTypenthatdescribesspeciccondition
forusingFLXA202/FLXA21inhazardous/classiedlocation.
AnexclusiveUser’sManualmightbeattachedtotheproductswhosesu󰀩xcodesoroption
codescontainthecode“Z”(madetocustomers’specications).Pleasereaditalongwiththis
manual.
PleasereadtheGeneralSpecicationsforCheckingthemodelandsu󰀩xcode.TheGeneral
Specicationsincludesit.
n Notes on Handling User’s Manuals
• Please hand over the user’s manuals to your end users so that they can keep the user’s
manuals on hand for convenient reference.
• Please read the information thoroughly before using the product.
• The purpose of these user’s manuals is not to warrant that the product is well suited to any
particular purpose but rather to describe the functional details of the product.
• No part of the user’s manuals may be transferred or reproduced without prior written
consent from YOKOGAWA.
• YOKOGAWA reserves the right to make improvements in the user’s manuals and product at
any time, without notice or obligation.
• Ifyouhaveanyquestions,oryoundmistakesoromissionsintheuser’smanuals,please
contact our sales representative or your local distributor.
Media No. IM 12A01A02-12E 9th Edition : Mar. 2018 (YK)
All Rights Reserved Copyright © 2010, Yokogawa Electric Corporation

ii
IM 12A01A02-12E 9th Edition : Mar. 23, 2018-00
n Drawing Conventions
Somedrawingsmaybepartiallyemphasized,simplied,oromitted,fortheconvenienceof
description.
Somescreenimagesdepictedintheuser’smanualmayhavedi󰀨erentdisplaypositionsor
character types (e.g., the upper / lower case). Also note that some of the images contained in this
user’s manual are display examples.
n Copyright and Trademark Notices
FLEXA, FLXA and SENCOM are trademarks or registered trademarks of Yokogawa Electric
Corporation.
All other company and product names mentioned in this user’s manual are trademarks or
registered trademarks of their respective companies.
We do not use TM or ® mark to indicate those trademarks or registered trademarks in this user’s
manual.
u CE marking products
n Authorised Representative in EEA
The Authorised Representative for this product in EEA is Yokogawa Europe B.V. (Euroweg 2,
3825 HD Amersfoort, The Netherlands).
n Identication Tag
Thismanualandtheidenticationtagattachedonapackingboxareessentialpartsofthe
product.
Keep them together in a safe place for future reference.
n Users
This product is designed to be used by a person with specialized knowledge.
n Information of the WEEE Directive
Thisproductispurposelydesignedtobeusedinalargescalexedinstallationsonlyand,
therefore, is out of scope of the WEEE Directive. The WEEE Directive does not apply. This
product should be disposed in accordance with local and national legislation/regulations.
The WEEE Directive is only valid in the EU.

Toc-1
IM 12A01A02-12E 9th Edition : Mar. 23, 2018-00
Model FLXA202 / FLXA21
2-Wire Analyzer
Start-up Manual
CONTENTS
IM 12A01A02-12E 9th Edition
uIntroduction....................................................................................................i
1. Instrument Check .........................................................................................1
2. Wiring and Installation.................................................................................4
2.1 Installation site ..................................................................................................... 4
2.2 Wiring the power supply ..................................................................................... 4
2.2.1
Cables, terminals and glands for FOUNDATION Fieldbus or PROFIBUS PA . 5
2.2.2 Grounding ............................................................................................. 6
2.2.3 Connection of the power supply ........................................................... 7
2.2.4 Installing the cable glands..................................................................... 7
2.3 Wiring the sensor................................................................................................. 9
2.3.1 pH Measurement ................................................................................ 10
2.3.2 ORP Measurement ..............................................................................11
2.3.3 SC Measurement................................................................................ 12
2.3.4 ISC Measurement............................................................................... 13
2.3.5 DO Measurement ............................................................................... 13
2.3.6 SENCOM pH/ORP Measurement ...................................................... 14
2.3.7 Wiring of YOKOGAWA sensors.......................................................... 15
2.3.8 Wiring of HAMILTON sensors............................................................. 16
2.3.9 Wiring covers ...................................................................................... 17
3. Operation.................................................................................................... 18
3.1 Change language............................................................................................... 18
3.2 Quick setup......................................................................................................... 18
3.3 Basic operation (when two sensors are connected) ..................................... 19
4. Commissioning ......................................................................................... 20
5. Maintenance............................................................................................... 21
uAppendix .................................................................................................... 23
Revision Record.......................................................................................................i

Blank Page

<1. Instrument Check> 1
IM 12A01A02-12E 9th Edition : Mar. 23, 2018-00
1. Instrument Check
Upon delivery, unpack the instrument carefully and inspect it to ensure that it was not damaged
during shipment. If damage is found, retain the original packing materials (including the outer
box)andthenimmediatelynotifythecarrierandtherelevantYokogawasaleso󰀩ce.
n Checking the model and su󰀩x code
lFLXA202
Makesurethemodelandsu󰀩xcodeonthenameplatea󰀩xedtotheleftsideofthehousing.
NOTE
Be sure to apply correct power to the unit , as detailed on the nameplate.
-D-B-D-AB-P1-P1
-A-N-LA-N-N/U/H6
Figure 1.1 Inside of the FLXA202 and example of nameplate

<1. Instrument Check> 2
IM 12A01A02-12E 9th Edition : Mar. 23, 2018-00
lFLXA21
Makesurethemodelandsu󰀩xcodeonthenameplatea󰀩xedtotheleftsideorinsideofthe
housing.
-D-P-D-CB-P1-NN-A-N-LA-N-NN
/UM/SCT
S3.02
2016.01
C2RA12345
S3.02
2016.01C2RA12345
-D-P-D-AA-P1-NN-A-N-LA-N-NN
/UM/SCT/H6
Figure 1.2 Example of nameplate (FLXA21)

<1. Instrument Check> 3
IM 12A01A02-12E 9th Edition : Mar. 23, 2018-00
l Checking the accessories
Make sure the accessories in Table 1.1 are included.
Table 1.1 Accessories
Product Name Quantity Remark
Cable glands FLXA202 3 sets One rubber plug attachement.
FLXA21 3 or 4 sets 4 sets when 2 sensors are used.
One grommet for grounding attachement.
pH analyzer Jumper 2 pcs/module
Grommet set 1 set/module
SENCOMTM
pH analyzer
Grommet 1
Option Bracket 1 set Option code /UM*, /U, /PM
Sun shade hood 1 set Option code /H6, /H7, /H8
Tag plate 1Option code /SCT
Adapter for conduit work 3 or 4 sets Option code /CB4, /CD4, /CF4
4sets when FLXA21 are used.
Instruction Manual (CD-ROM) 1 copy
Startup Manual 1 copy This manual
Safety Precautions 1 copy
*: The universal mounting kit (/UM) contains the brackets for both /U and /PM options.

<2. Wiring and Installation> 4
IM 12A01A02-12E 9th Edition : Mar. 23, 2018-00
2. Wiring and Installation
Open the front panel and remove the plastic wiring covers, and then install the cable glands (refer
to the Appendix A1). The wiring covers will be re-installed after the wiring is completed.
2.1 Installation site
The FLXA202/FLXA21 is weatherproof and can be installed both inside and outside. It should,
however, be installed as close as possible to the sensor to avoid long cable runs between the
instrument and sensor. When a pH sensor is used, the cable length including the sensor cable
should not exceed 20 meters (65.6 feet); 60 meters (197 feet) when using BA10 extension box
and WF10 cable. For a conductivity sensor the cable run should not exceed 60 meters (197
feet). For dissolved oxygen the sensor cable run should not exceed 30 meters (100 feet). For
SENCOM pH/ORP the sensor cable run should not exceed 20 meters (65.6 feet).
Select an installation site that meets the following conditions.
• Mechanical vibrations and shocks are negligible
• No relay switch and power switch are installed close to the converter
• There is space for cable connection beneath the cable glands
• Not exposed to direct sunlight or severe weather conditions
• Maintenance is possible
• No corrosive atmosphere
• Ambient Operating Temperature: -20 to +55 °C
• Humidity: 10 to 90% RH at 40 °C (Non-condensing)
• Water Protection: IP66 (except Canada), NEMA 4X (except Canada), Type 3S/4X (Canada)
If the instrument is installed outside and exposed to direct sunlight, a sun shade hood should be
used.
The FLXA202/FLXA21 can be mounted on a wall, pipe or panel when the mounting kit is
ordered. For dimensional information please refer to the Appendix, Mounting methods.
2.2 Wiring the power supply
FLXA202/FLXA21 is a 2-wire analyzer and can be powered by a DC power supply.
• Output is FOUNDATION Filedbus and PROFIBUS PA option
The Power Supply voltage is 9 to 32V DC.
• Output is mA with HART
The load resistance: impedance of electronic equipment: typically 250 Ohm
Number of input modules: 1-sensor measurement or 2-sensor measurement.
One (1) Sensor module (1 input):
16 to 40 V DC (for pH/ORP, SC and DO)
17 to 40 V DC (for ISC)
21 to 40 V DC (SENCOM pH/ORP)
Two (2) Sensor modules (2 inputs):
22.8 to 40 V DC (for pH/ORP, SC and DO)

<2. Wiring and Installation> 5
IM 12A01A02-12E 9th Edition : Mar. 23, 2018-00
2.2.1 Cables, terminals and glands for FOUNDATION
Fieldbus or PROFIBUS PA
Wire and install the system by referring to chapter 2 in the FLXA21 instruction manual (IM
12A01A02-01E).
The FOUNDATION Fieldbus or PROFIBUS PA power supply is 9 to 32 V DC. The wiring is the
same.
However, for the FOUNDATION Fieldbus or PROFIBUS PA cables, see Table 2.1.
Table 2.1 FOUNDATION Fieldbus or PROFIBUS PA Cables and transmissible Length
Parameters Conditions Type A Type B Type C Type D
MaxDCResistance,Ω/km per conductor 22 56 132 20
Max Attenuation, dB/km 1.25 f, (39 kHz) 3.0 5.0 8.0 8.0
Gauge —#18 AWG
(0.82 mm2)
#22 AWG
(0.32 mm2)
#26 AWG
(0.13 mm2)
#16 AWG
(1.25 mm2)
Max Length, meters —1,900 1,200 400 200
Note: 1900 m is trunk + sum of Spurs (Max length type A cable)
Yokogawa recommends the use of Type A.
Usage of Type B and D is restricted.
Yokogawa does not recommend the use of Type C.
Table 2.2 Recommended length of Spur Cables
Number of spur cables Length of a non-intrinsically
safe spur cable
15-16 60 m
13-14 90 m
1-12 120 m
Note: • 1 device per spur.
• Keep as short as possible (min 1 m)
250
600
1000
024.718
V - 11.5
0.022
R =
1295
1617 22.8 4040
Voltage (V)
2-sensor measurement
Load resistance (Ω)
Digital Communication
Range (HART)
Figure 2.1 Supply Voltage and Load Resistance
for pH/ORP (analog sensor), SC and DO
250
304
600
516
1000
0
24.7 18
V - 11.5
0.022
R =
1295
17 40
22.86
40
Except SENCOM
Voltage (V)
Load resistance (Ω)
Digital Communication
Range (HART)
18.2 21
Figure 2.2 Supply Voltage and Load Resistance
for ISC and pH/ORP SENCOM sensor