YOKOGAWA TB820D User manual

User’s
Manual TB820D
Right Angle Scattered Light
Turbidity Detector
IM 12E01B30-02EN
IM 12E01B30-02EN
2nd Edition

i
IM 12E01B30-02EN
<INTRODUCTION>
2nd Edition : June 09 , 2021-00
uINTRODUCTION
Thank you for purchasing TB820D Right Angle Scattered Light Turbidity Detector, FLXA402T
Liquid Analyzer for Turbidity and Chlorine.
This User’s Manual contains all essential information for the user to make full use of TB820D and
FLXA402T.
Please read the following respective documents before installing and using the instrument.
The related documents are listed as follows.
General Specications
Contents Document number Note
TB820D, FLXA402T Right Angle
Scattered Light Turbidity Analyzer GS 12E01B30-01EN Online manual
“EN” in the document number is the language code.
User’s Manual
Contents Document number Note
TB820D Right Angle Scattered Light
Turbidity Detector
Start-up and Safety Precautions
IM 12E01B30-01EN Attached to the product (printed manual)
TB820D Right Angle Scattered Light
Turbidity Detector IM 12E01B30-02EN Online manual (this manual)
FLXA402T Liquid Analyzer for Turbidity
and Chlorine
Start-up and Safety Precautions
IM 12A01G01-01EN Attached to the product (printed manual)
FLXA402T Liquid Analyzer for Turbidity
and Chlorine
Installation and Wiring
IM 12A01G01-02EN Online manual
FLXA402T Liquid Analyzer for Turbidity
and Chlorine
Operation of Converter
IM 12A01G01-03EN Online manual
FLXA402T Liquid Analyzer for Turbidity
and Chlorine
Operation of pH
IM 12A01G02-01EN Online manual
FLXA402T Liquid Analyzer for Turbidity
and Chlorine
Operation of SC
IM 12A01G03-01EN Online manual
“EN” in the document number is the language code.
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.
Technical Information
Contents Document number Note
FLXA402T Liquid Analyzer for Turbidity
and Chlorine
MODBUS Communication
TI 12A01G01-62EN Online manual
“EN” in the document number is the language code.
You can download the latest documents from our website. Scan QR code.
http://www.yokogawa.com/an/xa402t/download/
Refer to each corresponding manual for other related products.
No.IM 12E01B30-02EN 2nd Edition: June 2021 (YK)
All Rights Reserved Copyright © 2021, Yokogawa Electric Corporation

ii
IM 12E01B30-02EN
<INTRODUCTION>
2nd Edition : June 09 , 2021-00
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 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.
nTerminology
● Turbidity meter, Turbidity analyzer: TB820D + FLXA402T
● Detector, Detection unit: TB820D detector, TB820D Detection unit
● Converter or liquid analyzer: FLXA402T
n Trademark Acknowledgements
• 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.

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IM 12E01B30-02EN
<CONTENTS>
2nd Edition : June 09 , 2021-00
TB820D
Right Angle Scattered Light Turbidity Detector
CONTENTS
IM 12E01B30-02EN 2nd Edition
◆INTRODUCTION.............................................................................................i
1. OVERVIEW ................................................................................................ 1-1
1.1 Measurement system and structure............................................................... 1-1
1.2 Part Name and Functions ................................................................................ 1-2
1.3 Specications.................................................................................................... 1-2
1.4 Model and Codes .............................................................................................. 1-3
1.5 External Dimensions ........................................................................................ 1-4
1.6 Measurement principle..................................................................................... 1-4
2. INSTALLATION, PIPING, AND WIRING ..................................................... 2-1
2.1 Wiring ................................................................................................................. 2-2
2.1.1 SENCOM cable for turbidity and chlorine (A) .................................... 2-6
2.1.2 Power cable for FLXA402T (B).......................................................... 2-6
2.1.3 Power supply cable (C)...................................................................... 2-6
2.1.4 Wiring with PG400 ............................................................................. 2-7
2.1.5 When Relay box for solenoid valve is included ................................. 2-7
2.2 Piping ................................................................................................................. 2-9
2.2.1 System Using an Open Head Tank (/D3) .......................................... 2-9
2.2.2 A system using a Simple head tank (/D2) ....................................... 2-12
2.2.3 System Using a Pressurized Head Tank (/D1) ................................ 2-14
2.2.4 System without a Head Tank ........................................................... 2-17
3. PREPARATION for OPERATION ............................................................. 3-1
3.1 Piping and Wiring Check.................................................................................. 3-1
3.2 Conrming detector condition..................................................................................... 3-1
3.3 Supplying Power and switching operation mode...................................................... 3-1
3.4 Filling zero water and Test operation.............................................................. 3-2
3.5 Setting Operation Parameters......................................................................... 3-2
3.6 Calibration ......................................................................................................... 3-2
3.7 Supplying a Sample and Adjusting the Flow Rate........................................ 3-3
3.8 Adjusting ultrasonic power ............................................................................. 3-4
3.9 Switching to measurement mode ................................................................... 3-4
4. SETTING PARAMETERS ......................................................................... 4-1
4.1 Measure setting................................................................................................. 4-3
4.1.1 Negative value non output ................................................................. 4-3
4.1.2 Turbidity unit select ............................................................................ 4-3

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<CONTENTS>
2nd Edition : June 09 , 2021-00
4.1.3 Meas. damping time constant, Maint. damping time constant .......... 4-3
4.1.4 Turbidity warning High/Low limit ........................................................ 4-3
4.1.5 Air denoising setting........................................................................... 4-3
4.2 Cal./Maint. Settings........................................................................................... 4-6
4.2.1 Turbidity value of check tool............................................................... 4-6
4.2.2 Zero shift value, Correction factor...................................................... 4-6
4.2.3 Stability check .................................................................................... 4-6
4.2.4 Wash/Cal. box.................................................................................... 4-6
4.2.5 Ultrasonic wash.................................................................................. 4-6
4.2.6 Calibration setting others ................................................................... 4-7
4.3 Diagnosis setting .............................................................................................. 4-7
4.3.1 Light source diagnosis ....................................................................... 4-7
4.3.2 Dried condition diagnosis................................................................... 4-7
4.3.3 Operating days................................................................................... 4-7
4.4 Communication setting.................................................................................... 4-7
4.5 Auto Wash/Calibration setting ........................................................................ 4-8
4.5.1 Auto sequence for wash/cal............................................................... 4-8
4.5.2 Start date............................................................................................ 4-8
4.5.3 Auto Wash/Calibration function and wash type ................................. 4-8
4.5.4 Auto sequence setting ....................................................................... 4-8
5. FLXA402T sensor menu .......................................................................... 5-1
5.1 WASH ................................................................................................................. 5-2
5.2 Calibration ......................................................................................................... 5-2
5.3 Detail................................................................................................................... 5-2
5.4 Reset op. time.................................................................................................... 5-5
5.5 Setting ................................................................................................................ 5-5
5.6 Maintenance ...................................................................................................... 5-6
6. OPERATION .............................................................................................. 6-1
6.1 Turbidity measurement .................................................................................... 6-1
6.2 Air denoising ..................................................................................................... 6-1
6.3 When Sample Water Supply is Cut O󰀨 ........................................................... 6-1
6.4 Automatic wash/Automatic calibration Operation........................................ 6-1
6.5 Stop and restarting operation ......................................................................... 6-1
7. CALIBRATION........................................................................................... 7-1
7.1 Turbidity calculation and calibration menu ................................................... 7-2
7.2 Turbidity standards........................................................................................... 7-3
7.3 Zero Calibration................................................................................................. 7-7
7.4 Slope calibration (Check tool) ......................................................................... 7-8
7.5 Slope calibration (Standard solution)............................................................. 7-8
7.6 Auto zero calibration ........................................................................................ 7-9
7.7 Zero shift correction ......................................................................................... 7-9
7.8 Sensitivity correction ....................................................................................... 7-9
7.9 2 points correction.......................................................................................... 7-10

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<CONTENTS>
2nd Edition : June 09 , 2021-00
7.10 Basic (reference) sensitivity calibration....................................................... 7-11
7.11 Calibration Error.............................................................................................. 7-11
8. MAINTENANCE......................................................................................... 8-1
8.1 Washing the Flow cell....................................................................................... 8-2
8.2 Washing the Head Tank.................................................................................... 8-3
8.3 Checking and Replacing Desiccants.............................................................. 8-4
8.4 Pipe Cleaning .................................................................................................... 8-4
8.5 Replacing the Zero Turbidity Filter Element .................................................. 8-5
8.6 LED Replacement ............................................................................................. 8-6
8.7 Fuse Replacement ............................................................................................ 8-8
8.8 Window glass replacement............................................................................ 8-10
8.9 Flow cell replacement..................................................................................... 8-14
9. TROUBLESHOOTING .............................................................................. 9-1
9.1 When an error occurs....................................................................................... 9-1
9.2 When No Error Indication Appears ................................................................. 9-3
Appendix .................................................................................................. App.-i
Customer Maintenance Parts List............................... CMPL 12E01B30-01EN
Revision Information...........................................................................................i

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<1. OVERVIEW> 1-1
IM 12E01B30-02EN 2nd Edition : June 09 , 2021-00
1. OVERVIEW
To keep good quality in industrial or drinking water and rivers or streams, “Turbidity” is one of the
important measurement parameters to control water quality.
Turbidity analyzer is more than ever demanded not only for water treatment, but currently for
measurement/detection of suspended substances in industrial waste or of turbidity at chemical
processing facility.
Since their sales began in 1959, Yokogawa turbidimeters have been continuously developed and
improved using various measurement principles suited for various applications. With its many
achievements, Yokogawa has earned its customers’ condence. Right Angle Scattered Light
Turbidity Analyzer, composed of Turbidity Detector TB820D and Liquid Analyzer FLXA402T, is
a next-generation analyzer, developed based on years of experience, combining the reliable
measurement principle with our latest digital sensor technology realizing high e󰀩ciency in facility
operations.
FLXA402T is a converter designed, being tailored from the well-received FLXA402, to provide
multiple detector measurements. In addition to conventional analog output, Modbus TCP,
Modbus RTU/RS485 are available.
The technology of predictive maintenance prevents accidental shutdown of the factory and
reduces OPEX. TB820D has drastically improved maintainability and minimized maintenance
time.
1.1 Measurement system and structure
TB820D is used with FLXA402T Liquid Analyzer for Turbidity and Chlorine. TB820D also can be
used with a sampling system to control the pressure or ow rate of samples.
lTB820D Right Angle Scattered Light Turbidity Detector
TB820D measures turbidity. The Detection unit consists of the following three parts.
● Flow cell: Sample ows through it.
● Detection unit: Optical system incorporating Light source and Receiver
● Smart unit: Memory of parameters, the control unit
l FLXA402T Liquid Analyzer for Turbidity and Chlorine (converter)
The FLXA402T Liquid Analyzer for Turbidity and Chlorine output/displays measurement or status
of connected detectors.
Refer to IM 12A01G01-03EN for the setup of the display, input/output, or communication.
l Sampling System
Sample introduced into TB820D needs to be free from air bubbles by using a Head tank to
stabilize the pressure in piping and the ow rate. Use the sampling system if necessary.

<1. OVERVIEW>
1-2
IM 12E01B30-02EN 2nd Edition : June 09 , 2021-00
1.2 Part Name and Functions
nTB820D Turbidity detector
Top cover
Detection unit Flow cell
Smart unit
Smart unit cover
Front cover
Sample water outlet
LED
Sample water inletDrain
Fuse
1.3 Specications
See TB820D General Specication GS 12E01B30-01EN.

<1. OVERVIEW> 1-3
IM 12E01B30-02EN 2nd Edition : June 09 , 2021-00
1.4 Model and Codes
n Model and Su󰀩x Codes
TB820D Right Angle Scattered Light Turbidity Detector
Model Su󰀩x code
Option
code
Description
TB820D ············································· ········· Right Angle Scattered Light Turbidity Detector
Light
source
-NT
-FN
········· 660nm, Formazin, 0-0.2 NTU to 0-500 NTU
860nm, Formazin, 0-0.2 FNU to 0-700 FNU
Type -AB
-AD
-AG
-AJ
·········
·········
·········
·········
General purpose for CE, RCM, China standard
General purpose for CSA
General purpose for KC
General purpose
Relay box for
solenoid valve
-NN
-A5
·········
·········
Without relay box for solenoid valve
Relay box for solenoid valve
Ultrasonic cleaning -NN
-U1
·········
·········
Without ultrasonic cleaning
Oscillator for ultrasonic cleaning
Check tool -CT ········· With Check tool
―-NN ········· Always -NN
Option /L02
/L03
/L05
/L10
/L20
/SCT
/U
/CB3
/CD3
/CF3
/D1
/D2
/D3
/TC
/TCN
/NPT
Connection cable for analyzer 2 m
Connection cable for analyzer 3 m
Connection cable for analyzer 5 m
Connection cable for analyzer 10 m
Connection cable for analyzer 20 m
Stainless steel tag plate
Pipe mounting hardware (SUS)
Conduit adapter G1/2×3 pcs
Conduit adapter 1/2 NPT×3 pcs
Conduit adapter M20×1.5×3 pcs
Pressurized head tank for low turbidity (for 2 NTU or less)
Simple head tank (for over 2 NTU to 10 NTU)
Head Tank (for over 2 NTU)
One-touch connector (8 mm OD)
One-touch connector (1/4 inch OD)
ANSI standard connection
l Accessories
Name Q´ ty Remarks
Desiccant 14 pcs/Q’ty (Part number: K9657RJ)
Check tool 1
Silicone Cloth 1
Plug 2
l Spare parts
Name Part No. Description Q´ ty Frequency of Replacement
LED (red light) K8003DN for -NT, 660 nm Light source 13 years
LED (Infrared light) K8003DP for -FN, 860nm Light source 13 years
Desiccant * K9657RJ 1Yearly
Gasket K8003NR 1Yearly
FUSE A1633EF 1(*1)
FUSE A1624EF for -A5 2(*1)
Filter Element, 1 μm K9008ZD 1Yearly
Filter Element, 0.2 μm K9726EH 1Yearly
(*1) Use within a year after purchasing.