Assembling The Electronics Housing; Replacing The Electronics Module; Lcd Meter; Diagnostic Messages - Emerson Rosemount 3144P Reference Manual

Reference Manual
00809-0100-4021, Rev AA
March 2002
ASSEMBLING THE
ELECTRONICS
HOUSING
Replacing the
Electronics Module

LCD Meter

Use the following procedure to reassemble the electronics housing for the
Model 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 to mate the interconnecting pins
with the necessary receptacles on the electronics board.
3. Tighten the two mounting screws. Replace the LCD meter, if applicable.
4. Replace the cover. Tighten
compress the O-ring. Both transmitter covers must be fully engaged to
meet explosion proof requirements.

Diagnostic Messages

In addition to the output, the LCD meter displays abbreviated diagnostic
messages for troubleshooting the transmitter. To accommodate two-word
messages, the display alternates between the first and second word. Some
diagnostic messages have a higher priority than others, so messages appear
according to their priority, with normal operating messages appearing last.
The meter displays messages simultaneously on the Process Variable and
Process Variable Unit lines as shown in "LCD Meter Faceplate" on page A-7.
Messages on the Process Variable line refer to general device conditions,
while messages on the Process Variable Unit line refer to specific causes for
these conditions. A description of each diagnostic message follows.
[BLANK]
If the meter does not appear to function, make sure the transmitter is
configured for the meter option you desire. The meter will not function if
the LCD Meter option is set to Not Used.
FAIL -or- HDWR FAIL
This message indicates one of several conditions including:
• The transmitter has experienced an electronics module failure.
• The transmitter self-test has failed.
If diagnostics indicate a failure of the electronics module, replace the
electronics module with a new one. Contact the nearest Rosemount Field
Service Center if necessary.
SNSR 1 FAIL -or- SNSR 2 FAIL
The transmitter has detected an open or shorted sensor condition. The
sensor(s) might be disconnected, connected improperly, or
malfunctioning. Check the sensor connections and sensor continuity.
SNSR 1 SAT -or- SNSR 2 SAT
The temperature sensed by the transmitter exceeds the sensor limits for
this particular sensor type.
HOUSG SAT
The transmitter operating temperature limits (–40 to 185 °F (40 to
85 °C)) have been exceeded.
Model 3144P
1
/ of a revolution after the cover begins to
6
4-5