2-1
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 or read directly from the
optional HART port with an HCF-approved communicator (such as the
Emerson 375 HART Communicator, or equivalent).
.
Figure 2-1. LCD Gas Concentration Display
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