YOKOGAWA DO70G User Manual Download Page 2

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IM 12J05D04-01E

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 Introduction

The DO70G optical dissolved oxygen sensor uses the optical (fluorescence) measurement 

method to continuously measure oxygen dissolved in water
Topics and information that need your special attention in handling the product are given in the 

text of this manual along with cautionary notes, such as a warning or caution, depending on 

their importance. Strictly observe these items from the standpoint of safety and prevention of 

equipment damage. For a notation, such as a warning also indicated on the product, there is an 

alert mark in the manual.

1.  Confirming the Specifications

The DO70G sensor cable should have the specified length. The crimp-on terminals are either 

pin-type or M4 ring-type.
Upon arrival of the purchased product, carefully unpack it and make sure the product has not 

been damaged during transportation.
Verify the model code on a name plate adhered on the packaging box. For details of the model 

code, see subsection 1.2.2.

2.  Information Covered by This Manual

This manual covers all of the information on handling the DO70G optical dissolved oxygen 

sensor, such as instructions on installation, inspection, and maintenance and service.

Note : In this manual, descriptions of the basic system assumes that the DO402G Dissolved Oxygen Converter or FLXA402 4-Wire 

Converter is used.

Refer to the instruction manual for information on the converter connecting holders with the 

DO70G and how to connect sensor cables.
Note that the instruction manuals listed in the following table are for the associated equipment 

used with the EXA 

DO

TM

 Dissolved Oxygen Metering System.

Manuals for Associated Equipment Used with the EXA 

DO

 Dissolved Oxygen Metering System

Model

Title of Manual

Manual No.

DO402G

Dissolved Oxygen Converter

IM 12J05D02-01E

FLXA402

4-Wire Converter

IM 12A01F01-02EN

IM 12A01F05-01EN etc

DO70G

Optical Dissolved Oxygen Sensor

IM 12J05D04-01E (This manual)

DOX10

Power Supply Unit

IM 12J05S01-01E

PB350G

Angled Floating Ball Holder

IM 19H1E1-01E

PB360G

Vertical Floating Ball Holder

IM 19H1E2-01E

DOX8HS

Submersion Type Holder (Style B)

IM 19H1D2-01E

Note:  Only the basic system of basic components are listed on the front panel.

   

Refer to respective instruction manual for information on recorders, annunciators and other instruments.

An exclusive User’s Manual might be attached to the products whose suffix codes or option 

codes contain the code “Z” (made to customers’ specifications). Please read it along with this 

manual.

n

  Trademark Notices

•  EXA DO, FLXA are 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.

No. IM 12J05D04-01E 

8th Edition: July 2023 (YK)

All Rights Reserved Copyright © 2012, Yokogawa Electric Corporation

8th Edition : July 11, 2023

Summary of Contents for DO70G

Page 1: ...User s Manual Model DO70G Optical Dissolved Oxygen Sensor IM 12J05D04 01E IM 12J05D04 01E 8th Edition...

Page 2: ...mation on the converter connecting holders with the DO70G and how to connect sensor cables Note that the instruction manuals listed in the following table are for the associated equipment used with th...

Page 3: ...perator 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 d...

Page 4: ...s of warranty period Failure of components which are out of scope of warranty stated in instruction manual Failure caused by usage of software hardware or auxiliary equipment which Yokogawa did not su...

Page 5: ...Blank Page...

Page 6: ...2 Installing the Sensor and Connecting the Cable 2 1 2 1 Preparing for Installation 2 1 2 2 Installation 2 2 2 2 1 Selecting the Measurement Point 2 2 2 2 2 Selecting the Sensor Holder 2 3 2 2 3 Insta...

Page 7: ...Blank Page...

Page 8: ...ng ball or vertical floating ball holders In the submersion type holder the sensor can be automatically cleaned with jet sprayed water or air at regular intervals By selecting a suitable holder and cl...

Page 9: ...shape pin Weight Sensor Approx 0 1 kg Cable For E Approx 0 1 kg m 0 1 kg For D Approx 0 8 kg m 0 8 kg Power supply DO402G from DOX10 Power Supply Unit FLXA402 from FLXA402 The DOX10 may not be used de...

Page 10: ...r Option Code If you order only DO70G please make a separate order for the adaptor by Part No in the table below However if you are already using DOX8HS PB350G PB360G and DO70G you can use the existin...

Page 11: ...03E 05E 10E No cable type Approx 70 Approx 90 Approx 100 1500 L 3 m 5 m 10 m L 5 m 10 m 15 m 20 m Unit mm 12 7 Cable length code 05D 10D 15D 20D l Adaptor S3 PP Adaptor FPP 23 Pg13 5 DIN40430 30 5 26...

Page 12: ...the cable connector insert the sensor connector into the cable connector Note A weak pressure is sufficient for inserting it If a strong pressure is needed to insert it the connection position will b...

Page 13: ...r The assembly is submerged to the optimum point to obtain precise measurements This section explains how to select the measurement point and sensor holder 2 2 1 Selecting the Measurement Point Normal...

Page 14: ...is immune to large variations in the liquid level Since the wet part is smooth and less susceptible to catching flocs the sensor does not trap rubbish that mixes in with the SUM Related description S...

Page 15: ...r CAUTION Do not contaminate or wet the tip of the sensor cable when assembling the sensor If you will not begin wiring the sensor cable immediately take the protective measures necessary to prevent t...

Page 16: ...solved Oxygen Converter user s manual IM 12J05D02 01E For information on sensor cable to connect DO70G to DO402G refer to the user s manual IM 12J05D02 01E for DO402G Dissolved Oxygen Converter instru...

Page 17: ...Blank Page...

Page 18: ...t may occur DO402G Dissolved Oxygen Converter or FLXA402 4 Wire Converter detects these failures If a sensor error code appears on the display follow one of the procedures below 1 Clean the sensor sen...

Page 19: ...prepare 1 liter of the calibration solution for zero adjustment O Ring EPDM K9691KB For Adaptor Mounting Adaptor K9148NA K9148NB K9679CA For submersion type holder stainless steel S3 For submersion t...

Page 20: ...l Added a maintenance part on the list page 4 2 Deleted CMPL Jul 2017 3rd Edition Added Trademark Notices Product Disposal and Model name pages i ii 1 5 Dec 2015 2nd Edition P1 3 P3 5 Added coments of...

Page 21: ...Blank Page...

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