• 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.
• It is good practice to have all calibration components
previously assembled.
14. After the 30 second countdown:
• The display alternates between "CAL" and a value
(for example: 60 PPM for 0 to 100 ppm carbon
monoxide). 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 for approximately
two seconds (FIGURE 3-16).
• There are no adjustments necessary.
The display will show the span gas value while the span gas is
flowing to the unit. (For example, it may read 60 PPM or
25 % or 60 %LEL; FIGURE 3-17).
15. Turn OFF the gas flow by turning the knob on the
flow controller.
• 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
Chapter 3, Calibration
3-24
To Next Page
Loading...
Need help?
General
