3. Point the Calibrator or Controller at the Toxgard II Gas
Monitor display (FIGURE 1-2); press the ZERO button or
push the right-hand internal CAL push-button (FIGURE
1-1) until the word "ZERO" appears; then, release.
NOTE: The zero or calibration process can be aborted at
any time during the 30-second countdown interval;
simply press any button on the Calibrator or
Controller while aiming it at the unit or by pushing
the internal push-button.
The 30-second countdown interval is omitted
for oxygen units. It is electronically zeroed.
The display shows:
• A countdown from 30 to 0 seconds
• APPLY ZERO GAS (FIGURE 3-9)
4. After the 30 second countdown:
• The display alternates between "CAL" and a value (for
example: 0 PPM). This value is the actual reading of the
gas concentration the sensor is detecting.
• 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 SensorGard.
• If the calibration signal is enabled during
Figure 3-9.
Apply Zero Gas Flag
Chapter 3, Calibration
3-10
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