Emerson Rosemount CT5100, Reference Manual

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11 Troubleshooting and diagnostics
11.1 Using the Built-in-Self-Test (BIST) fault
diagnostics
The analyzer has a Built-In-Self-Test (BIST) function that can be used to perform failure
diagnosis of some functions in situations where there is a fault other than a complete
failure of the equipment. The BIST is accessed and controlled through the display
controller mounted on the door of the electrical compartment.
The BIST runs in the background when the analyzer is operating and continuously
monitors the analyzer for faults.
Procedure
1. If the BIST detects a fault, the STATUS display in the bottom left-hand corner of the
Gas Sensor Main screen ( Figure 11-1 , Item A) will change from OK to flashing the
word
FAILURE
.
Figure 11-1: Gas Sensor Main Screen
A. FAILURE message
B. FAILURE button
2. Similarly, if a fault is detected and the Pressure and Temperature screen ( Figure 11-2 )
is being displayed, the STATUS display in the bottom left-hand corner of the screen
(A) will change from OK to flashing the word FAILURE .
3. On either the Gas Sensor Main screen ( Figure 11-1 ) or the Pressure and Temperature
screen ( Figure 11-2 ), pressing the FAILURE button (B) will take you to the Faults
menu screen ( Figure 11-5 ).
Reference Manual Troubleshooting and diagnostics
00809-0100-4512 October 2019
Reference Manual 113