6. Turn OFF the zero gas and remove the flow controller, if
used previously.
7. Locate the span gas cylinder and the 1.5 LPM Flow
Controller (P/N 478358).
8. Screw the Flow Controller onto the top of the span
gas cylinder.
9. Locate the Tube Assembly (P/N 711112).
10. Push the smaller end of the Tube Assembly over the gas
outlet of the Flow Controller.
• Ensure that the tubing completely covers the gas outlet
(FIGURE 3-7).
11. Connect the other end of the tubing over the SensorGard
inlet (FIGURE 3-15).
12. Turn ON the gas flow by turning the flow controller knob.
• Notice the open arrow on the knob of the flow controller.
• If a CAL FAULT indication is on the Toxgard II Gas
Monitor display before the user is able to apply the gas
(FIGURE 3-11), a steady state gas condition existed for
longer than 15 seconds; this caused the unit to use a
wrong reading as a span indication.
• It is necessary to restart the calibration process to
clear this condition.
• Ensure that any calibration gases are applied during
the 30-second count down period.
Figure 3-14.
Apply SPAN Gas Flag
Chapter 3, Calibration
3-18
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