Ultima Gas Monitor Controller
The Ultima Gas Monitor Controller also provides the above
functions and access to the additional following features:
• Automatic calibration at timed intervals when used with MSA
Ultima Gas Monitor auto-calibration module.
• Three levels of alarm and relays when used with an MSA Ultima
Gas Monitor Relay module
• Date of last successful calibration
• Maximum gas readings over selected time periods
• Average gas readings over selected time periods
• Changing of span gas value from factory-set value
• Access to real-time clock for a time and date stamp
See the instruction manual for your Ultima Gas Monitor Calibrator
(P/N 813167) or Ultima Gas Monitor Controller (P/N 813379) for
proper calibration procedures.
Note on Resetting Latched Alarms
When an Ultima Gas Monitor has an active latched alarm
(indicated by a flashing alarm display):
• An infrared (IR) remote device (such as the Ultima Calibrator or
Ultima Controller) may be used to reset this alarm.
• The next IR command it receives from a calibration device will
reset the latched alarm (if it is not beyond the alarm threshold).
The intended IR command will be ignored and interpreted as an
’alarm reset.’ When the latching alarm function is inactive, other
valid IR commands may be used.
Ultima Gas Monitor Calibration Output Signal
The Ultima Gas Monitor is shipped with the calibration output
signal disabled so the output signal will track the gas
concentration value during the calibration process. In some
applications, it may be desirable to disable or lock the output to a
pre-determined output value to prevent activation of alarm
devices. The calibration signal can be enabled using the Ultima
Controller. When the calibration signal is enabled, the output
signal is 12 KHz for frequency and MUX output models; output
signal is 3.75 milliamps for the 4 to 20 milliamp output models.
NOTE: For the range of 25% oxygen, the calibration signal
will be 21 mA.
Chapter 2, Start-up
2-5
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