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Reference Manual
00809-0100-4021, Rev GC
Section 5: Maintenance
April 2014
Maintenance
4. Firmly grasp the screws and assembly and pull straight out of the housing, taking care
not to damage the interconnecting pins.
Note
If you are replacing the electronics module with a new one, make sure that the alarm switches
are set in the same positions.
Replacing the electronics module
Use the following procedure to reassemble the electronics housing for the 3144P Transmitter.
1. Examine the electronics module to ensure that the failure mode and transmitter
security switches are in the desired positions.
2. Carefully insert the electronics module lining up the interconnecting pins with the
necessary receptacles on the electronics board.
3. Tighten the two mounting screws. Replace the LCD display, if applicable.
4. Replace the cover. Tighten
1
/6 of a revolution after the cover begins to compress the
O-ring. Both transmitter covers must be fully engaged to meet explosion proof
requirements.
5.2.4 Transmitter diagnostics logging
The Transmitter Diagnostics Logging feature stores advanced diagnostic information between
device resets, such as what caused the transmitter to go into alarm, even if that event has
disappeared. For example, if the transmitter detects an open sensor from a loose terminal
connection, the transmitter will go into alarm. If wire vibration causes that wire to begin making
a good connection, the transmitter will come out of alarm. This jumping in and out of alarm is
frustrating when trying to determine what is causing the problem. However, the Transmitter
Diagnostics Logging feature keeps track of what caused the transmitter to go into alarm and
saves valuable debugging time. The log may be viewed using an asset management software,
such as AMS
™
Device Manager.
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