Span; Successful Span; Unsuccessful Span - Honeywell GasAlert Extreme User Manual

GasAlert Extreme
User Manual

Span

To bypass the span function, press
ceed to the alarm setpoint screens. If the span is bypassed, the
calibration due date cannot be changed.
Verify that the calibration gas being used matches the span
concentration values that are defined for the detector. For
more information, refer to
6. The set span screen displays a flashing
The flashing does not display for oxygen (O
7. Apply the calibration gas.
8. Apply gas to the sensor at a flow rate of 500 ml/min.
(for NH , Cl , and ETO: 1000 ml/min.)
3 2
The gas readings change as gas is applied to the sensor. When
the detector senses a sufficient concentration of gas (approxi-
mately 30 seconds), the detector beeps once.
9. The detector then begins spanning the sensor as follows:
• NH , Cl , ClO , O
3 2 2
• O : 30 seconds to span
2
• other gases: 2 minutes (approximately) to span.
The detector beeps three times when the span is complete.
36
Note
C
to automatically pro-
Calibration Guidelines.
.
Note
) detectors.
2
, and ETO: 5 minutes to span
3

Successful Span

If the span is successful, the LCD automatically displays the calibration
due date screen.

Unsuccessful Span

If the detector fails to span a sensor successfully,
The detector vibrates and beeps, and the LEDs flash. Then the detector
automatically proceeds to the alarm setpoint screens.
If the span 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 has not dropped significantly during the
2-minute span.
If the span is still unsuccessful, use a new gas cylinder.
If the span continues to be unsuccessful, replace the sensor. Refer to
Replacing the Battery or Sensor.
displays.
FAIL