2. Identify the sensor assembly needed and obtain the
appropriate sensor assembly; replace sensor assembly.
NOTE: Alarm setpoints and relay functions
(energized/de-energized, latching/unlatching, and
upscale/downscale) will not change when changing a
sensor module from its current gas type to the same
gas type (e.g., carbon monoxide to carbon monoxide).
Alarm setpoints and the upscale/downscale relay
function will change to the new sensor’s default
settings when changing a sensor module from its
current gas type to a different gas type (e.g., carbon
monoxide to oxygen).
3. The Ultima X Series Gas Monitor is shipped with the Sensor
Swap Delay enabled. This means that the 4-20 mA output
signal and the FAULT relay will hold off a fault indication for
60 seconds after the sensor missing indication is displayed
on the instrument. This setting allows the operator to
exchange sensor modules without a FAULT indication.
4. Refer to Chapter 2, "Calibration".
It is recommended that all other maintenance be performed at an
MSA factory-authorized service center.
Table 4-1. Operational Display Messages
MESSAGE INDICATES
MM/DD/YY
Format for date scrolling
VER
Software version level will display next
TIME
Time will display next
DATE
Date will display next
MIN
MIN value for this interval will display next
MAX
MAX value for this interval will display next
AVG
AVG value for this interval will display next
Adr
Instrument’s address will display next
End
End of calibration cycle
Err
An Error code will display next
HR
Special case indicates hours (two characters or less)
OVER
Gas value is greater than the set range
Chapter 4, Maintenance
4-4