GasAlertMicro
User Manual
If a span is rejected, the LCD displays:
NotE
:
SPAn
rEJEctEd
and bypasses the span for the failed sensor(s).
The LCD then automatically proceeds to the alarm setpoints
screen.
Auto Span Fail
If one or more of the sensors fail, an error message displays
indicating which sensor failed.
The remaining sensors continue to span normally.
If the auto span still fails, confirm that
•
gas is being applied to the sensor,
•
the sensor is detecting a sufficient gas
concentration within 30 seconds, and
•
the gas concentration does not drop significantly
during the 2-minute span.
Attempt the auto span calibration again.
If the auto span is still unsuccessful, attach a new gas
cylinder.
If the sensor fails the span again, replace the sensor. Refer
to
Replacing a Sensor or Sensor Filter
Alarm Setpoints
The alarm setpoints are used to set limits and ranges for the
TWA, STEL, low, and alarms.
H
2
S
(Hydrogen sulfide)
CO
(Carbon monoxide)
LEL %
/
vol
(lower exposure
limits)
O
2
%
(Oxygen 20.9 percent))
The LCD displays the TWA, STEL, low, and high alarm
setpoints for H
2
S first. After H
2
S, it automatically proceeds to
CO and then the remaining gases, displaying the alarm
setpoints for each.
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