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Auto Span
The display shows K prompting you to apply the calibration
gas to the sensor or you can skip the span (sensitivity
adjustment).
Use a calibration gas meeting the recommended gas mixture
as listed in the guidelines.
4.
Apply gas to the sensor at a flow rate of 250 to
500 ml/min.
OR
Press C to skip the span.
When the detector senses approximately one-half of the
expected gas concentration (30 seconds), the audible alarm
beeps once. The detector then begins spanning the sensor
(2 minutes). (These times are valid if a GasAlertMax
calibration gas is used.)
The audible alarm beeps three times at the end of the span.
Calibration and Setting Alarm Setpoints
Note
The detector will not span a sensor if:
•
You do not apply gas to the sensor.
•
The sensor fails to detect at least one-half of
the expected gas concentration in the first 30
seconds.
•
The gas concentration drops below one-half of
the expected gas level during the 2-minute
span.
If you apply gas to a sensor and the detector fails to
F
span the sensor, press
and repeat the calibration process using a new gas
cylinder. If the sensor fails the span a second time,
replace the sensor. (See the section,
Sensor, Pump, or Pump
Filter.)
GasAlertMax
to exit the calibration
Replacing a
37
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