YOKOGAWA FLXA21 User manual

User’s
Manual Model FLXA202 / FLXA21
2-Wire Analyzer
IM 12A01A02-01E
IM 12A01A02-01E
8th Edition

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IM 12A01A02-01E 8th Edition : Oct. 01, 2015-00
uIntroduction
Thank you for purchasing the FLXA202/FLXA21 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
* 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
Attached to the product
FLXA202/FLXA21
Safety Precautions IM 12A01A02-20E
FLXA202/FLXA21
User’s Manual IM 12A01A02-01E This manual
This is included In attached CD-ROM
FLXA21
FOUNCATION Fieldbus Communication IM 12A01A02-71E
These are included In attached CD-ROM
FLXA21
PROFIBUS PA Communication IM 12A01A02-72E
* the “E” in the document number is the language code.
Please read the General Specications for Checking the model and suf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.
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 different 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.
Media No. IM 12A01A02-01E 8th Edition : Oct. 2015 (YK)
All Rights Reserved Copyright © 2010, Yokogawa Electric Corporation

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IM 12A01A02-01E 8th Edition : Oct. 01, 2015-00
n Composition of this User’s Manual
The model FLXA202/FLXA21 2-Wire Analyzer offers 4 kinds of measurements – pH/ORP
(oxidation-reduction potential), contacting conductivity (SC), inductive conductivity (ISC) or
dissolved oxygen (DO) – with a respective sensor module.
The FLXA202/FLXA21 delivered has one specic kind of measurement depending on your order.
Contents pH/ORP Contacting
conductivity (SC)
Inductive
conductivity (ISC)
Dissolved
oxygen (DO)
SENCOM
pH/ORP
Introduction and
general description Section 1
Wiring and installation Section 2
Operation Section 3 Section 6 Section 9 Section 12 Section 15
Commissioning Section 4 Section 7 Section 10 Section 13 Section 16
Calibration Section 5 Section 8 Section 11 Section 14 Section 17
Maintenance Section 18
Troubleshooting Section 19

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u Safety Precautions
n Safety, Protection, and Modication of the Product
• In order to protect the system controlled by the product and the product itself and ensure
safe operation, observe the safety precautions described in this user’s manual. We assume
no liability for safety if users fail to observe these instructions when operating the product.
• If this instrument is used in a manner not specied in this user’s manual, the protection
provided by this instrument may be impaired.
• If any protection or safety circuit is required for the system controlled by the product or for
the product itself, prepare it separately.
• Be sure to use the spare parts approved by Yokogawa Electric Corporation (hereafter
simply referred to as YOKOGAWA) when replacing parts or consumables.
• Modication of the product is strictly prohibited.
• The following safety symbols are used on the product as well as in this manual.
WARNING
This symbol indicates that an operator must follow the instructions laid out in this manual in order
to avoid the risks, for the human body, of injury, electric shock, or fatalities. The manual describes
what special care the operator must take to avoid such risks.
CAUTION
This symbol indicates that the operator must refer to the instructions in this manual in order to
prevent the instrument (hardware) or software from being damaged, or a system failure from
occurring.
CAUTION
This symbol gives information essential for understanding the operations and functions.
NOTE
This symbol indicates information that complements the present topic.
This symbol indicates Protective Ground Terminal.
This symbol indicates Function Ground Terminal. Do not use this terminal as the protective
ground terminal.
n Warning and Disclaimer
The product is provided on an “as is” basis. YOKOGAWA shall have neither liability nor
responsibility to any person or entity with respect to any direct or indirect loss or damage arising
from using the product or any defect of the product that YOKOGAWA can not predict in advance.

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IM 12A01A02-01E 8th Edition : Oct. 01, 2015-00
nMark position of intrinsic safety
The mark position of intrinsic safety is shown as follows
FLXA202-D-*-…
*1
*2
Type:-CB
*1: This marking conforms to Intrinsic safety of IECEx.
*2: This marking conforms to Intrinsic safety of ATEX.

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FLXA21-D-*-…
*1
*4
*2 *6
*7
*5
*1
*4
*3
*2
*6
*7
*5
*1
*5
*2
*3 *3 *6
*7
*4
-P (Plastic) -S (Stainless steel)
-U (Stainless steel + urethane coating)
-E (Stainless steel + epoxy coating)
*1: This marking conforms to Intrinsic safety of IECEx.
*2: This marking conforms to Intrinsic safety of ATEX.
*3: This marking conforms to Intrinsic safety of NEPSI.
*4: This marking conforms to Intrinsic safety of FM.
*5: This marking conforms to Intrinsic safety of CSA.
*6: This marking conforms to nonincendive of FM.
*7: This marking conforms to nonincendive of CSA.
*1
*2
*4
*5
*3
*6
*7
Top Side Bottom Side
*1: This marking conforms to Intrinsic safety of IECEx.
*2: This marking conforms to Intrinsic safety of ATEX.
*3: This marking conforms to Intrinsic safety of NEPSI.
*4: This marking conforms to Intrinsic safety of FM.
*5: This marking conforms to Intrinsic safety of CSA.
*6: This marking conforms to nonincendive of FM.
*7: This marking conforms to nonincendive of CSA.

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IM 12A01A02-01E 8th Edition : Oct. 01, 2015-00
nFLXA202/FLXA21
• The FLXA202/FLXA21 should only be used with equipment that meets the relevant IEC,
American, Canadian, and Japanese standards. Yokogawa accepts no responsibility for the
misuse of this unit.
• Don’t install “general purpose type” instruments in the hazardous area.
• The Instrument is packed carefully with shock absorbing materials, nevertheless, the
instrument may be damaged or broken if subjected to strong shock, such as if the
instrument is dropped. Handle with care.
CAUTION
Electrostatic discharge
The FLXA202/FLXA21 contains devices that can be damaged by electrostatic discharge.
When servicing this equipment, please observe proper procedures to prevent such damage.
Replacement components should be shipped in conductive packaging. Repair work should
be done at grounded workstations using grounded soldering irons and wrist straps to avoid
electrostatic discharge.
CAUTION
• Do not use an abrasive or organic solvent in cleaning the instrument.
• Substitution of components may impair suitability for Division 2.
Do not remove or replace while circuit is live unless area is known to be non hazardous.
Explosion Hazard – Do not disconnect equipment unless area is known to be non
hazardous.
Do not reset circuit breaker unless power has been removed from the equipment or the area
is known to be non hazardous.
CAUTION
• This instrument is a EN61326-1 Class A product, and it is designed for use in the industrial
environment. Please use this instrument in the industrial environment only.
• The HART communication may be inuenced by strong electromagnetic eld.
In this case another trial of the HART communication and/or operation with FLXA202/
FLXA21 touch screen can be carried out.
CAUTION
When you open the front panel, make sure the screws are completely out of the screw holes, and
then open the front panel slowly in order not to damage the threaded parts on the housing. If the
threaded parts are damaged and the screws cannot be tightened, the waterproof performance
will deteriorate.
CAUTION
Be careful to touch the concentrated sulfuric acid.

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l How to dispose the batteries:
This is an explanation about the new EU Battery Directive(DIRECTIVE 2006/66/EC).This
directive is only valid in the EU.
Batteries are included in this product.Batteries incorporated into this product cannot be removed
by yourself.Dispose them together with this product.
When you dispose this product in the EU,contact your local Yokogawa Europe B.V.ofce.Do not
dispose them as domestic household waste.
Battery type: Manganese dioxide lithium battery
Notice: The symbol means they shall be sorted out and collected as ordained in
ANNEX II in DIRECTIVE 2006/66/EC.
l Product Disposal:
The instrument should be disposed of in accordance with local and national legislation/regulations.
lFor Intrinsic safety type
WARNING
Electrostatic charge may cause an explosion hazard. Avoid any actions that cause the generation
of electrostatic charge, e.g., rubbing with a dry cloth. Because the enclosure of the FLXA21
2-Wire Analyzer, if it is mounted in an area where the use of category 1 G Zone 0 apparatus is
required, it must be installed such, that, even in the event of rare incidents, ignition sources due
to friction sparks are excluded.
Figure 1 Warning label

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n Warranty and service
Yokogawa products and parts are guaranteed free from defects in workmanship and material
under normal use and service for a period of (typically) 12 months from the date of shipment from
the manufacturer.
Individual sales organisations can deviate from the typical warranty period, and the conditions of
sale relating to the original purchase order should be consulted. Damage caused by wear and
tear, inadequate maintenance, corrosion, or by the effects of chemical processes are excluded
from this warranty coverage.
In the event of warranty claim, the defective goods should be sent (freight paid) to the service
department of the relevant sales organisation for repair or replacement (at Yokogawa discretion).
The following information must be included in the letter accompanying the returned goods:
• Part number, model code and serial number
• Original purchase order and date
• Length of time in service and a description of the process
• Description of the fault, and the circumstances of failure
• Process/environmental conditions that may be related to the failure of the device.
• A statement whether warranty or nonwarranty service is requested
• Complete shipping and billing instructions for return of material, plus the name and phone
number of a contact person who can be reached for further information.
Returned goods that have been in contact with process uids must be decontaminated/
disinfected before shipment. Goods should carry a certicate to this effect, for the health and
safety of our employees.
Material safety data sheets should also be included for all components of the processes to which
the equipment has been exposed.
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 Copyright and Trademark Notices
The copyrights of online manual contained in the CD-ROM are reserved.
The online manual is protected by the PDF security from modication, however, it can be output
via a printer. Printing out the online manual is only allowed for the purpose of using the product.
When using the printed information of the online manual, check if the version is the most recent
one by referring to the CD-ROM’s version.
No part of the online manual may be transferred, sold, distributed (including delivery via a
commercial PC network or the like), or registered or recorded on video tapes.
FLEXA, FLXA and SENCOM are registered trademarks of Yokogawa Electric Corporation.
Adobe, Acrobat and Acrobat Reader are either registered trademarks or trademarks of Adobe
Systems Incorporated in the United States and/or other countries.
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.

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l FLXA202/FLXA21’s fonts
(c) Copyright 2000-2001 /efont/ The Electronic Font Open Laboratory. All rights reserved.
Redistribution and use in source and binary forms, with or without modication, are permitted
provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions
and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of
conditions and the following disclaimer in the documentation and/or other materials provided
with the distribution.
3. Neither the name of the team nor the names of its contributors may be used to endorse or
promote products derived from this font without specic prior written permission.
THIS FONT IS PROVIDED BY THE TEAM AND CONTRIBUTORS “AS IS” AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE TEAM OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
WAY OUT OF THE USE OF THIS FONT, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.