4
Warning: Do not work on the system unless the power is switched off or
isolated.
Caution: Ensure that anti-static handling procedures are observed applied
when working on the system, i.e. Anti- Static Wrist Straps
Warning: The Guarantee label around the Detector Head is fitted to ensure
that the Detector head is not tampered with. Any attempt to remove
or disassemble the head will void the warrantee and may affect the
detector calibration settings requiring the Detector Head to be
replaced.
Prior to conducting maintenance on the OMD system it is recommended to isolate the Pre-Alarm and
Slowdown/Shutdown Relays and the detectors being maintained. In addition, if the detector head is to
be removed from the base the detector cable should be detached from the detector.
Isolating the relays will ensure that an alarm condition, which may occur during maintenance, is not
transmitted to the AMS.
Isolating the detector will ensure that faults or alarm, which may occur during maintenance, are not
indicated on the Control Unit or Remote Display Unit.
Disconnecting the detector cable from the detector will ensure that light entering the sample chamber
does not result in a backup alarm being initiated.
4.1 ENGINE ISOLATIONS
To perform isolations on an engine it is necessary log in to Engineering access level.
To access the Engine Isolation Menu press the Isolate button on the Engine Menu, see section 3.12
Figure 116 Engine Isolation Menu
All Detectors Isolates/De-isolates all detectors connected to the Control Unit.
Pre-Alarm relay Isolates/De-isolates the Control Unit Pre-Alarm Relay.
Slow down relay Isolates/De-isolates the Control Unit Slowdown/Shutdown Alarm Relay.
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