Preface; Introduction; Unpacking And Checking; Warranty And Service - YOKOGAWA DO71 Instruction Manual

1. PREFACE

1.1 Introduction

The DO71 optical dissolved oxygen
sensor uses the optical measurement
method to continuously measure oxygen
dissolved in water in various industries
and applications where accurate mea-
surement and control is required.
The optical sensor is integrated in a
exchangeable stainless-steel cap that is
screwed to the probe housing.
These extremely robust probes can be
installed in various applications. The op-
tical sensors have a fast response time &
good long-term stability with low mainte-
nance and low costs of ownership.
The DO71 sensor is available for ppm
range oxygen measurements. The inter-
face used is Bi-directional digital com-
munication RS485 and can be connected
directly to the new FLXA402 4-Wire con-
verter. Converter is designed to combine
the superior functionality and ease of
use from the Yokogawa FLXA series with
the digitization of the future.
The DO71 sensor is ideally suited for ap-
plications in W&WW where it must stand
harsh measurement conditions. The
DO71 sensors has a permanent cable
which is offered in various cable lengths.
The crimp-on terminals are pin type.

1.2 Unpacking and Checking

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 label
adhered on the packaging box. For de-
tails of the model code, see subsection 7.

1.3 Warranty and Service

Yokogawa products and parts are guar-
anteed free from defects in workmanship
and material under normal use and ser-
vice for a period of (typically) 12 months
from the date of shipment from the man-
ufacturer. Individual sales organizations
can deviate from the typical warranty pe-
riod, 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 cover-
age. In the event of warranty claim, the
defective goods should be sent (freight
paid) to the Service Department of the
relevant sales Organization for repair or
replacement (at Yokogawa's discretion)
The following information must be
included in the letter accompanying the
returned goods:
• Model Code and Serial Number.
• Original Purchase Order and Date.
• Length of time in service and descrip-
tion of the process.
• Description of the fault and circum-
stances of the failure.
• Process/environmental conditions
that may be related to the failure of the
sensor
• Statement as to whether warranty or
non-warranty service is requested.
• Complete shipping and billing instruc-
tions for return of material, plus the
name and phone number of a contact
person that can be reached for further
information.
• Clean Statement
Returned goods that have been in
contact with process fluids must be
decontaminated and disinfected prior to
shipment. Goods should carry a certif-
icate to this effect, 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(options) have been exposed.
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