YOKOGAWA FU20 User Manual

User ’s
Manual

Model FU20
pH/ORP Sensor

IM 12B07K02-01E

IM 12B07K02-01E

4th Edition

<INTRODUCTION>

 INTRODUCTION

This user’s manual provides information for the installation and use of the FU20 pH/ORP sensor.
The FU20 is the choice for the majority of typical waste water and process applications.

Upon delivery, unpack the sensor carefully and inspect it to ensure it was not damaged during
shipment. If damage is found, retain the original packing materials (including outer box) and then

immediately notify the carrier and the relevant Yokogawa sales o󰀩ce. Make sure the Model Code
on the sensor is the same as on the packing list. For details of the Model Code, refer to Sec. 1.2.

Other related items are described in the following manuals.

Model Title IM No.

FLXA202, FLXA21 2-Wire Liquid Analyzer IM 12A01A02-01E

FLXA402 4-Wire Converter IM 12A01F01-02EN

IM 12A01F02-01EN etc.

PH450G 4-wire pH/ORP Converter IM 12B07C05-01E

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Media No. IM 12B07K02-01E 4th Edition : Nov. 2018 (YK)

All Rights Reserved Copyright © 2000, Yokogawa Electric Corporation

IM 12B07K02-01E

4th Edition : Nov.20,2018-00

<INTRODUCTION>

 For the safe use of this equipment

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.

• 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.

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.

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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.

n Signal Words

The following words are used in this manual.

CAUTION

This symbol gives information essential for understanding the operations and functions.

NOTE

This symbol indicates information that complements the present topic.

IM 12B07K02-01E

4th Edition : Nov.20,2018-00

<INTRODUCTION>

 After-sales Warranty

n Do not modify the product.

n During the warranty period, for repair under warranty consult the local sales representative

or service o󰀩ce. Yokogawa will replace or repair any damaged parts. Before consulting for

repair under warranty, provide us with the model name and serial number and a description
of the problem. Any diagrams or data explaining the problem would also be appreciated.

• If we replace the product with a new one, we won’t provide you with a repair report.

• Yokogawa warrants the product for the period stated in the pre-purchase quotation

Yokogawa shall conduct dened warranty service based on its standard. When the

customer site is located outside of the service area, a fee for dispatching the maintenance
engineer will be charged to the customer.

• Returned goods that have been in contact with process uids must be decontaminated
and disinfected prior to shipment. Goods should carry a certicate to this e󰀨ect, for the
health and safety of our employees. Material Safety Data sheets must be included for all

components of the process to which the sensor have been exposed.

n In the following cases, customer will be charged repair fee regardless of warranty period.

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• 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
Electric did not supply.

• Failure due to improper or insu󰀩cient maintenance by user.

• Failure due to modication, misuse or outside-of-specications operation which Yokogawa

does not authorize.

• Failure due to power supply (voltage, frequency) being outside specications or abnormal.

• Failure caused by any usage out of scope of recommended usage.

• Any damage from re, earthquake, storms and oods, lightning, disturbances, riots, warfare,

radiation and other natural changes.

n Yokogawa does not warrant conformance with the specic application at the user site.

Yokogawa will not bear direct/indirect responsibility for damage due to a specic application.

n Yokogawa Electric will not bear responsibility when the user congures the product into

systems or resells the product.

n Maintenance service and supplying repair parts will be covered for ve years after the

production ends. For repair for this product, please contact the nearest sales o󰀩ce

described in this instruction manual.

IM 12B07K02-01E

4th Edition : Nov.20,2018-00

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