YOKOGAWA FLXA202 User Manual
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YOKOGAWA FLXA202 User Manual

2-wire analyzer
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User's
Manual
FLXA202 / FLXA21
2-Wire Analyzer
Installation and Wiring
(Introduction and General Description)
IM 12A01A03-01EN
IM 12A01A03-01EN
1st Edition

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Questions and answers

Shamim Riyaz
March 25, 2025

Output not showing in dcs

User image 67e2f250a73d3
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1 comments:
Mr. Anderson
March 25, 2025

The output may not be showing in the DCS for the YOKOGAWA FLXA202 due to the following reasons:

1. Incorrect Output Configuration – The output settings may not be properly configured. Ensure that the process parameters for output are correctly set.

2. HOLD Function Enabled – If the HOLD function is active, the output may be fixed at a set value instead of transmitting real-time data.

3. Simulation Mode Enabled – If the device is in simulation mode, it may not be sending actual measured values to the DCS.

4. Wiring or Connection Issue – Check if the wiring and connections between the FLXA202 and the DCS are correct and secure.

5. Power Supply Issue – Ensure that the analyzer is receiving proper power and there are no interruptions.

6. Communication Protocol Issue – If using HART communication, verify that the DCS is correctly configured to receive and interpret the HART signals.

7. Measurement Signal Issue – If the sensor is not providing valid measurements, the output value may not be transmitted properly.

To resolve the issue, check and adjust the output settings, verify connections, and ensure that the HOLD or simulation functions are not active.

This answer is automatically generated

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Summary of Contents for YOKOGAWA FLXA202

  • Page 1 FLXA202 / FLXA21 User’s Manual 2-Wire Analyzer Installation and Wiring (Introduction and General Description) IM 12A01A03-01EN IM 12A01A03-01EN 1st Edition...
  • Page 2 Thank you for purchasing the FLXA 202/FLXA 21 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 12A01A02-72E, too.
  • Page 3 • 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 find mistakes or omissions in the user’s manuals, please contact our sales representative or your local distributor.
  • Page 4 FLXA21 PROFIBUS PA Communication IM 12A01A02-72E Trademark Notices FLEXA, FLXA, 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.
  • Page 5 Blank Page...

  • Page 6: Table Of Contents

    Toc-1 FLXA202 / FLXA21 2-Wire Analyzer Installation and Wiring IM 12A01A03-01EN 1st Edition CONTENTS Introduction ....................i INTRODUCTION AND GENERAL DESCRIPTION ........1-1 Instrument check ....................1-3 Screen operation ....................1-6 Passwords ....................... 1-11 Regulatory Compliance .................. 1-11 Model & Suffix Codes ..................1-16 WIRING AND INSTALLATION ..............
  • Page 7 Blank Page...

  • Page 8: Introduction

    <1. INTRODUCTION AND GENERAL DESCRIPTION> INTRODUCTION AND GENERAL DESCRIPTION This manual describes how to use the FLXA202/FLXA21 with Yokogawa’s or other companies’ sensors. Please read carefully this manual and the instruction manual of the relevant sensor before using this instrument.
  • Page 9 <1. INTRODUCTION AND GENERAL DESCRIPTION> LCD display Wiring cover 1 (for the first module) Wiring cover 2 (for the second module) (Wiring cover 3 for power supply and grounding is under the wiring cover 2.) Jumper holder (provided only for pH measurement) Front panel Front view...

  • Page 10: Instrument Check

    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 1.3 Example of nameplate (FLXA202) FLXA21 Loosen four front panel screws of the FLXA21, open the panel to the left, and make sure the model and suffix code on the nameplate affixed to the left side or inside of the housing agrees with your order.Refer to 1.5...
  • Page 11 <1. INTRODUCTION AND GENERAL DESCRIPTION> -D-P-D-CB-P1-NN-A-N-LA-N-NN /UM/SCT S3.02 C2RA12345 2016.01 -D-P-D-AA-P1-NN-A-N-LA-N-NN /UM/SCT/H6 S3.02 C2RA12345 2016.01 Figure 1.4 Example of nameplate (FLXA21) IM 12A01A03-01EN 1st Edition : Jan. 20, 2021-00...
  • Page 12 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.

  • Page 13: Screen Operation

    <1. INTRODUCTION AND GENERAL DESCRIPTION> Screen operation CAUTION Press the touch screen only with your finger. Do not use a tool with a sharp tip (ex. pencil, ballpoint pen), a thin stick, a tool with a hard tip etc. to avoid scratches on the touch screen. Press the center of the icon or character to avoid wrong operation.
  • Page 14 <1. INTRODUCTION AND GENERAL DESCRIPTION> Main display Tag:PH 10.38 Go to Home (Figure 1.8) Go to Zoom (Figure 1.10) TEXT_PH1 Go to Information (Figure 1.12) 25.0 °C TEXT_TEMP1 WASH TEXT_ORP1 HOLD Go to Execute & Setup (Figure 1.13) 20mA Figure 1.6 Example of main display Main display The Main display appears upon startup when one sensor is connected and the MONITOR...
  • Page 15 <1. INTRODUCTION AND GENERAL DESCRIPTION> Home display (when two sensors are connected) Tag:PH 10.38 25.0 °C Tag:PH 6.35 24.9 °C 20mA Figure 1.8 Example of home display Home display The Home display appears upon startup when two sensors are connected and the MONITOR display is disabled.
  • Page 16 <1. INTRODUCTION AND GENERAL DESCRIPTION> Trend display Tag ： 9.10pH 12.00 Maximum value on this display Current process value 8.40 5.60 Minimum value on this display 2.50 12:00 12:20 12:40 Maximum Time Average Minimum Figure 1.11 Example of trend display Trend display The Trend display appears when the Trend button on the Zoom display is pressed.
  • Page 17 1-10 <1. INTRODUCTION AND GENERAL DESCRIPTION> Information button Diagnosis information on converters and sensors appears. No malfunction detected. Warning When a warning icon appears, maintenance is required. Pressing this icon displays an error message, and pressing the message displays the troubleshooting guidelines. Fault This icon indicates a malfunction.

  • Page 18: Passwords

    사용자는 이 점을 주의하시기 바라며, 가정외의 지역에서 사용하는 것을 목적으로 합니다. Russian: TR CU 020/2011 RoHS: EN 50581: 2012 (FLXA202; Style 1.02 or newer, FLXA21; Style 3.03 or newer) Installation altitude: 2000 m or less Category based on IEC 61010: I (Note 1) Pollution degree based on IEC 61010: 2 (Note 2) Note 1: Installation category, called over-voltage category, specifies impulse withstand voltage.
  • Page 19 Ambient Temperature: -20 to 55°C Control Drawing: Refer toIM 12A01A02-20E United FLXA202 and FLXA21: [Intrinsically safe / Nonincendive] States (FM) Applicable Standard: Class 3600: 2011, Class 3610: 2010, Class 3611: 2004, Class 3810:2005, NEMA 250: 2014, ANSI/ISA 60079-0: 2013, ANSI/ISA 60079-11: 2014...
  • Page 20 Ex nA ic IIC T4 Gc Ambient Temperature: -20 to 55°C Enclosure: IP66 Control Drawing: Refer toIM 12A01A02-20E China FLXA202 and FLXA21: [Intrinsic safety “ia”] (NEPSI) Applicable Standard: GB3836.1-2010, GB3836.4-2010, GB 3836.20-2010 Certificate No: GYJ18.1051X Marking/Rating: Ex ia IIC T4 Ga Ambient Temperature: -20 to 55°C...
  • Page 21 <1. INTRODUCTION AND GENERAL DESCRIPTION> WARNING Installation and wiring The FLXA202/FLXA21 should only be used with equipment that meets the relevant IEC, American or Canadian standards. Yokogawa accepts no responsibility for the misuse of this unit. WARNING Don’t install “general purpose type” instruments in the hazardous area.
  • Page 22 WARNING 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.

  • Page 23: Model & Suffix Codes

    1-16 <1. INTRODUCTION AND GENERAL DESCRIPTION> Model & Suffix Codes FLXA202 Model Suffix code Option code Description FLXA202 ······················································· ··············· 2-Wire Analyzer Power supply -D ··············· Always -D Housing ··············· Aluminum alloy cast + urethane coating (*1) ··············· Aluminum alloy cast + epoxy coating ···············...
  • Page 24 1-17 <1. INTRODUCTION AND GENERAL DESCRIPTION> Product registration is done by Yokogawa Taiwan Corporation as an importer in Taiwan. Type “-CD ” is intrinsic safety, but is available as nonincendive. For detailed information refer to Japanese GS 12A01A03-01JA. Korean IM is attached to FLXA202 instead of English IM.
  • Page 25 The type “-CB” intrinsic safety type of ATEX and IECEx. Temperature class is T4. Product registration is done by Yokogawa Taiwan Corporation as an importer in Taiwan. The type “-CD” is intrinsic safety of FM and CSA, and non-incendive of FM and CSA. Temperature classes are T4.

  • Page 26: Wiring And Installation

    WIRING AND INSTALLATION Install the cable glands into the FLXA202/FLXA21 before installing it (2.3 I n s t a l l i n g t h e c a b l e glands) Upon delivery, the cable glands are not installed.
  • Page 27 <2. WIRING AND INSTALLATION> WTB10 or BA10 Case of Distributor FLXA21 2-Wire Analyzer Terminal box PH201G (Style B) – CMN CMN n n n n n n n Output 2 (1-5V DC) (*3) n n n n n n n n n Output 1 (1-5V DC) Power supply –...

  • Page 28: Installation Site

    <2. WIRING AND INSTALLATION> 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 the pH sensor is used, the cable length including the sensor cable should not exceed 20 meters (65.6 feet);...

  • Page 29: Removing The Wiring Cover

    NOTE Wiring covers are required intrinsic safety (Type is -C*). In the case of type -S5, only wiring cover 1 is attached to the FLXA202. In the case of other types, the cover is not attached to the FLXA202. Wiring cover 2...

  • Page 30: Installing The Cable Glands

    For sensor 1 cable (A hole is drilled, if specified.) For power supply For power supply For grounding cable FLXA202 FLXA21 Figure 2.5 Cable gland diagram CAUTION Be careful not to be injured by the sharp hole edges on the housing.
  • Page 31 N•m. If cable glands, not gland nuts, are tightened, O-rings may be come out from the proper positions. For FLXA202 type -S5 For Type -S5, a shield bracket is included. See Figure 2.7. Place the shield bracket inside the case to the position of the holes of the case.

  • Page 32: Wiring The Power Supply

    Two (2) Sensor modules (2 inputs): 22.8 to 40V DC (for pH/ORP, SC and DO) Note: When the FLXA202/FLXA21 is used in the multi-drop mode of HART communication, the output signal is changed from 12.5 mA DC to 4 mA DC just after the power is turned on. Enough power supply for the instruments is to be provided.

  • Page 33: Grounding

    <2. WIRING AND INSTALLATION> CAUTION The FLXA202/FLXA21 is used with a DC power supply. Do not use an alternating current or 100 volt mains power supply. The cable leading to the distributor (power supply) supplies the power to and transmits the output signal from the FLXA202/FLXA21.

  • Page 34: Connection Of The Power Supply

    <2. WIRING AND INSTALLATION> A: FLXA202 B: FLXA21 (External grounding) (Internal grounding) Figure 2.10 Grounding 2.4.2 Connection of the power supply Pass the supply/output cable through the power cable hole shown in Figure 2.5 into the converter and connect it to the terminals marked +, – and according to the marks on the power terminal (Figure 2.11).

  • Page 35: Wiring Cover

    Wiring covers are required intrinsic safety and Type n (Type is -C*, -DB, -DE). In the case of type -S5, only wiring cover 1 is attached to the FLXA202. In the case of other types, the cover is not attached to the FLXA202.

  • Page 36: Sensor Wiring

    In the case of type -S5, only wiring cover 1 is attached to the FLXA202. In the case of other types, the cover is not attached to the FLXA202. When all the detector wiring is complete, close the FLXA202 front cover, and turn the power on. Check that the screen displays normally.
  • Page 37 2-12 <2. WIRING AND INSTALLATION> CAUTION Do not tighten up four front panel screws one by one. Each front panel screw should be tightened up in two times of screwing. And, firstly the screw at the upper left should be screwed a bit, the next is at the lower right, third is at the upper right, and fourth is at the lower left.
  • Page 38 2-13 <2. WIRING AND INSTALLATION> Wiring of YOKOGAWA sensors FLXA202/FLXA21 Terminals Short *2 FLXA202 18/13 19/15 Sensor Measurement Remark /FLXA21 Sensor cable marking (or color) Jumper *1 Terminals DO30G Fixed Cable FU20/ pH, pH & PH20/ Fixed Cable ORP, rH...
  • Page 39 2-14 <2. WIRING AND INSTALLATION> Wiring of HAMILTON sensors FLXA202/FLXA21 Terminals Short *2 Measure- FLXA202 18/13 19/15 Sensor Remark ment /FLXA21 Sensor cable marking (or color) Jumper *1 Terminals WU20D CHEMTRODE Blue (White) 13/14 Cable CHEMTRODE- 13/14 CHEMTRODE- 13/14 VP6-SC...

  • Page 40: Wiring The Ph/Orp Sensor

    2-15 <2. WIRING AND INSTALLATION> 2.5.1 Wiring the pH/ORP sensor pH Measurement Conventional pH sensors are connected to the module as follows: FLXA202/FLXA21 11 Temperature 12 Temperature 13 Reference 14 Solution ground 15 Glass (measure) 16 Shield 17 Shield Liquid...
  • Page 41 ORP as process variable and a pH Glass electrode as reference. This is the case with rH measurement and with pH compensated ORP measurement. Conventional ORP sensors are connected to the module as follows: FLXA202/FLXA21 11 Temperature 12 Temperature...
  • Page 42 2-17 <2. WIRING AND INSTALLATION> NOTE The special grommet is intended to be used to seal the multiple cables from the Yokogawa flow fittings such as FF20. The designated cables are WU20 sensor cables, which are approximately 5 mm (0.2”) in diameter, and K1500FV liquid earth cables, which are approximately 2.5 mm (0.1”) in diameter. For sensor systems using a single cable, like the FU20/FU24 and the PR10, PD20, PF20 and PS20, the standard gland will accommodate the cable adequately.

  • Page 43: Wiring The Conductivity (Sc) Sensor

    2.5.2 Wiring the conductivity (SC) sensor Contacting Conductivity, SC, sensors are connected to the module as follows: FLXA202/FLXA21 Temp The above diagram shows wiring for 4-electrode conductivity sensors, such as SC42-SP34 large bore series. For 2-electrode conductivity sensors, such as SC42-SP36 small bore series, jumpers must be installed between terminals 13-14 and between terminals 15-16, as shown in the diagram below.

  • Page 44: Wiring The Dissolved Oxygen (Do) Sensor

    Wiring the dissolved oxygen (DO) sensor The input module for DO measurement is suitable for different types of DO sensors: i. Galvanic sensors like model DO30G ii. Polarographic sensors like HAMILTON’S Oxyferm and Oxygold The connection is as follows: FLXA202/FLXA21 11 TC + TC - + anode galvanic - cathode galvanic + anode polarographic...
  • Page 45 WU11 SENCOM cable together with the band. Ferrite core Wiring band Shield cable (82) WU11 cable Figure 2.19 Ferrite core for WU11 SENCOM cable FLXA202 acknowledges the connection of sensors, if not, FLXA202 alerts an error. IM 12A01A03-01EN 1st Edition : Jan. 20, 2021-00...

  • Page 46: Mounting Methods

    2-21 <2. WIRING AND INSTALLATION> Mounting methods See Figure 2.30. The FLXA202/FLXA21 has various mounting possibilities. • Panel mounting using optional mounting hardware (/PM or /UM) • Wall mounting using optional mounting hardware (/U or /UM) • Pipe mounting using optional mounting hardware (/U or /UM) on a horizontal or vertical...

  • Page 47: Operation

    CAUTION When the FLEXA is intrinsic safety type or nonincendive type, DO NOT connect FieldMate HHT (Hand Held Terminal) to the Hazardous side of Associated Apparatus. *1 Distributor Assosiated FLXA202/FLXA21 or I/O Card Apparatus 4-20 mA line FieldMate or HHT...
  • Page 48 (2) Select a desired language (click the to scroll the language options.) (3) Click YES. Changing languages automatically reboots the FLXA202/FLXA21. Check that the parameters match your specifications and modify them if necessary before using the instrument. A sheet for user settings is contained. Please take a note of your settings on it when you configure the FLXA202/FLXA21 and keep the sheet just in case.
  • Page 49 Blank Page...

  • Page 50: Maintenance

    Battery The FLXA202/FLXA21 has a logbook feature that uses a clock to provide the timings. The instrument contains a lithium cell (battery) to continue the clock function while the power is turned off. Although the cell has an expected working life of 10 years, this is not guaranteed. When this...
  • Page 51 Blank Page...

  • Page 52: Troubleshooting

    20mA Figure 4.2 Error message for wrong combination of 2 sensor modules If FLXA202-SENCOM SA makes communication error A message of Checksum error or communication error may appear when FLXA202 is used with SENCOM SA. Check the connection between SENCOM SA and FLXA202 or restart (turn off/on the power) FLXA202. IM 12A01A03-01EN 1st Edition : Jan. 20, 2021-00...
  • Page 53 <4. TROUBLESHOOTING> FLXA21 Replacement of Modules Only authorized person of Yokogawa is allowed to replace modules. Be sure to keep the replacement procedure below. CAUTION Turn off the power supply to the analyzer before replacement of modules. Lock Unlock Figure 4.3 Locking the module Do not hold the upper fine part when pulling out the module. First, unlock the module by releasing the lock mechanism on the left and right of the module.
  • Page 54 <4. TROUBLESHOOTING> Checking nameplates of safety marking In case of Intrinsic safety type or type ”n” or nonincendive model, confirm the name plate on the housing assembly and the sensor module. See IM 12A01A02-20E ■ Mark position of intrinsic safety and nonincendive. CAUTION Intrinsic safety type or type n or nonincendive housing assembly /sensor module are certified independently. So they must be combined appropriately. CAUTION Don’t use General Purpose housing assembly / sensor module as Intrinsic safety type module. IM 12A01A03-01EN 1st Edition : Jan.
  • Page 55 Blank Page...
  • Page 56 (see Table 1) DO Sensor module assembly (see Table 1) SSA module assembly (13(Grommet) is included.) CMPL 12A01A03-01EN All Rights Reserved. Copyright © 2015 Yokogawa Electric Corporation. Subject to change without notice. 1st Edition: Oct. 2015 (YK) 4th Edition: Jan. 2021 (YK)
  • Page 57 Table 1 Item 1; Sensor module assembly, QIC sheet is included. Type code -CB, -CD, -CF, -CG, -CH, -CQ, -CR -AB, -AD, -AG, -AQ, -AR, -DB, -DD, -DE Module (Intrinsic safety) *1 (General purpose, nonincentive and Type-n) *1, *2 pH/ORP K9702ES K9702ER K9702FS...
  • Page 58 Jumper (only for pH) K9676BY Grommet set (only for pH) K9698NF Protection cover (only for TIIS) CMPL 12A01A02-01E All Rights Reserved. Copyright © 2010 Yokogawa Electric Corporation. Subject to change without notice. 1st Edition: May 2010 (YK) 13th Edition: Jan. 2021 (YK)
  • Page 59 Table 1 Item 1; Sensor module assembly, QIC sheet is included. Type code -EA, -EF, -EG, -EQ, -ER -AA, -AQ, -AR -CB, -CD, -CH -AB, -AD, -AG, -DD (Intrinsic safety) *1 (General purpose) *2 (Intrinsic safety) *1 (General purpose and Module nonincentive) *1, *2 pH/ORP...

  • Page 60: Revision Record

    Revision Record Manual Title : Model FLXA202 / FLXA21 2-Wire Analyzer Installation and Wiring Manual No. : IM 12A01A03-01EN Jan. 2021/1st Edition Newly published (Separate volume from IM 12A01A02-01E) IM 12A01A03-01EN 1st Edition : Xxx. xx, 2021-00...
  • Page 61 Yokogawa Electric Corporation 2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, JAPAN http://www.yokogawa.com/ IM 12A01A03-01EN 1st Edition : Xxx. xx, 2021-00...

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