After initial start-up, the Toxgard II Monitor also displays a
calibration flag as a reminder to perform a field calibration
(FIGURE 2-2). While this message is displayed, the Toxgard II
Monitor is functioning within factory-set calibration parameters.
Once the first successful field calibration is performed, the
calibration flag turns OFF.
"
CAUTION
To ensure a fully functional sensor, perform a calibration check
and adjustments at initial start-up.
During normal operation, the Toxgard II Monitor displays the gas
concentration of the surrounding environment. The corresponding
output signal can be transmitted to a controller. For a complete
listing of display and output conditions other than normal
operation, see TABLE 5-1.
NOTE: The combustible gas model of the Toxgard II Monitor is
capable of detecting concentrations of certain
combustible gases above 100% LEL. When
exposed to these concentrations, the Toxgard II
Monitor will display one of two modes:
• LOC % LEL - The Toxgard II Monitor has been
exposed to a high concentration of gas (above the
LEL) and there is a possibility that the over-range
condition may still exist.
• 100 % LEL - The Toxgard II Monitor has been
exposed to a high concentration of gas (above the
LEL) and the over-range condition definitely still exists.
Figure 2-2.
Calibration Flag Display
Chapter 2, Start-up
2-2
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