• If the calibration signal is enabled during calibration, it will
be held at the lockout value for two additional minutes.
• When the span gas is removed from the sensor, the
sensor reading may drift for a few minutes; this is normal
sensor operation.
• If a CAL FAULT flag appears on the unit (FIGURE 3-11),
this indicates:
• An unsuccessful attempt to calibrate the Toxgard II
Gas Monitor
• The Toxgard II Gas Monitor is operating with the
calibration parameters defined before the calibration
was attempted.
To extinguish the CAL FAULT flag, a complete calibration
procedure must be performed.
The Toxgard II Gas Monitor allows automatic zero and span
adjustments only within a pre-defined range. It cannot
make any corrections outside this range, such as when an
empty or wrong cylinder of gas is applied or failure to
begin gas flow within the allotted 30-second
countdown occurs.
Figure 3-17.
Span Gas Connection
Chapter 3, Calibration
3-20