Chapter 2
Start-up and Calibration
Initial Start-up
• The Ultima X Series Gas Monitors are factory-calibrated and
ready for immediate use.
• Once power is applied to the unit, the LCD shows a test of all
display words. The software version number displays; then, a
30-second (self-check) countdown for sensor stability begins.
• During the 30-second countdown, the output signal is the same
as the calibration signal when enabled during a normal
calibration. This is described later in this chapter under "Ultima
X Series Gas Monitor Calibration Output Signal".
• For units with LEDs, the Alert red LED will be solid ON during
the 30-second countdown.
• After the 30-second countdown, observe that the gas type and
gas concentration (ppm, % Gas, or % LEL) alternately flash
(FIGURE 2-1).
• For units with LEDs, the Normal green LED will be solid ON
after the 30-second countdown.
• A complete listing of instrument operation features can be found
in TABLE 2-1.
During normal operation, the Ultima X Monitor displays the gas
concentration of the surrounding environment. The corresponding
output signal can be transmitted to a controller.
NOTE: The catalytic combustible model of the Ultima X Series
Gas Monitors is capable of detecting concentrations of
certain combustible gases above 100% LEL. When
exposed to these concentrations, the Ultima X Series
Gas Monitors will display one of two modes:
• +LOC % LEL - The Ultima X Series Gas Monitor has been
exposed to a high concentration of gas (above the LEL)
Figure 2-1.
LCD Gas Concentration Display
Chapter 2, Start-up and Calibration
2-1
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