01440D Light Industrial Gas Analyser Service Manual. 2.7
2.4 Servicing the Infrared Transducer
The Infrared transducer in the analyser is non-field serviceable. In the unlikely event
of failure, the transducer should be removed by following the procedure below and
returned to Servomex for repair or replacement.
A list of the IR transducers available is given in Section 3.4.
2.4.1 Removal of the Infrared Transducer
1. Remove the two M4 nut holding down the interface assembly
01415930.
2. Carefully ease the interface assembly (01415930) from the pin
connectors on the transducer PCB.
3. Disconnect the transducer pipes from the sampling system.
4. Loosen the 4 off M4 nuts retaining the bracket that the transducer is
located on. Slide the whole assembly to one side and lift out from the
analyser.
5. When the assembly is free, unscrew the transducer from the bracket
by the 3 off screws located on the underside of the bracket.
6. For the longer “off board” sensors only: slacken the two fixing screws,
which retain the Infrared bench to the side mounting plate. Utilise the
slot on the front fixing to remove the bench without completely
undoing the fasteners.
7. Remove the transducer PCB by squeezing the catches on the 4 off
PCB mounting supports, and gently pulling the board off the mounts.
8. Installation of the new transducer is the reverse of the above
procedure.
WARNING
• The opening of covers or removal of parts, except those to which
access can be gained by hand, may expose electrical terminals.
Ensure power is disconnected before working on the analyser.
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