Functional Safety (Sil 2); Detector Placement - Teledyne 700 IR Series Instruction Manual

Infrared gas detector for combustible and co2 gases

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Table Of Contents

Table of Contents

700 IR Series

INFRARED GAS DETECTOR FOR COMBUSTIBLE AND CO

GASES

USER MANUAL

A good ground connection should be verified between the sensor's metal enclosure and

the junction box. If a good ground connection is not made, the sensor can be grounded to

the junction box using the sensor's external ground lug. Also verify a good ground

connection between the junction box and earth ground. Installer shall use ring terminal to

make connection to earth ground to be secured by screw and lock washer on sensor

housing. Caution: do not loosen or twist the protective earth conductor. An earth conductor

shall be mounted so that it is secured against loosening and twisting.

Ensure the Housing Bottom is threaded tightly to the Intelligent Transmitter Module. The

locking setscrew (M3.5 x 0.6 6g6h Stainless Steel Allen set screw cup point with yield

strength of greater than 40,000 PSI, typical 80,000 PSI) should then be tightened down

to keep the Housing Bottom from being inadvertently removed or from becoming loose

under vibration. The locking setscrew ensures that Housing Bottom is only removable by

authorized personnel with the use of special tools. A M1.5 Allen Wrench is required. If

screw requires replacement, only an identical screw may be used.

Removal of the Housing Bottom violates the Ex d protection method and hence power must

be removed from the detector prior its safe removal.

Proper precautions should be taken during installation and maintenance to avoid the build-

up of static charge on the plastic components of the detector. These include the splashguard

and splashguard adapter.

When used in ATEX zone, OLCT 700 shall be attached to increased safety certified junction

box only.

The sensor shall be installed on a metallic grounded structure such as the final assembly

assures that sensor enclosure is bonded to ground.

10) Proper precautions shall be taken during installation, operation, maintenance and service

of the product in order to avoid the build-up of static charges on the plastic splashguard.

11) The equipment manufacturer shall be contacted for information on the dimensions of the

flameproof joints.

12) The screws holding down the retaining plate are special fasteners of type: stainless steel,

Philips pan-head machine screws, M3 x 0,5 6g having yield strength greater than 40000

PSI.

2.2