•
Once the gas value on the display is stable for 15
seconds, the alternating display stops. If the calibration is
successful, the display will show END and 0
(FIGURE 3-10).
a.
If using the zero cap: remove it.
b.
If using a zero gas cylinder:
1) Turn OFF the gas flow by turning the flow
controller knob.
2) Remove the tubing from the Flow Controller.
•
If the calibration signal is enabled during
calibration, it will be held at the lockout value
for an additional two minutes.
c.
If a CAL FAULT flag appears on the unit (FIGURE 3-11),
this indicates:
•
An unsuccessful attempt to zero or 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.
•
See Troubleshooting Guidelines found in Chapter 5.
The Toxgard II Gas Monitor allows automatic zero adjustment
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.
Spanning
•
If this is the first calibration after the sensor element is replaced,
refer to "Initial Calibration."
•
If this is an oxygen sensor, refer to "Oxygen Calibration" later in
this chapter.
5.
The Toxgard II Gas Monitor automatically begins the span
countdown after a successful zeroing of the unit. The
span countdown is also 30 seconds (FIGURE 3-14).
•
The span process can be aborted at any time during the
countdown by simply pressing any button on the
Calibrator while aiming it at the unit or by pressing the
internal push-button.
Chapter 3, Calibration
3-17
