Appendix: Instrument Messages
MSA
ULTIMA X ® Series
GB
91
The highest priority message is displayed first. Lower priority messages are output
only after the highest priority message is cleared. A manual selected scanning of
low-priority messages is not possible.
ZERO CAL FAULT /
SPAN CAL FAULT
Instrument did not calibrate
successfully
-
Repeat calibration
-
Check if the correct cali-
bration gas was used .
-
Check flow system for
blockage
SENSOR WARN-
ING
Sensor life has almost ex-
pired
-
Prepare to replace sen-
sor.
CHECK CAL
Check calibration
-
Carry out bump test or
calibration.
+LOC
Instrument is locked in over-
range condition
-
Calibrate or reset sensor.
OVER % LEL
Sensor is exposed to a gas
concentration above the LEL
-
The instrument will return
to normal operation when
the gas concentration
drops below 100 % LEL.
Und
Underrange condition
- slow -
-
Calibrate or replace sen-
sor.
und
Underrange condition
- fast -
-
Calibrate or replace sen-
sor.
Message
Meaning
Remedy