BW Technologies GasAlert Extreme User Manual download pdf (Page 52)

GasAlert Extreme

User Manual

Note

Verify that the calibration gas being used matches

the span concentration values that are defined for

the detector. For more information, refer to Span

Concentration.

The set span screen displays a flashing gas

cylinder.

Note

The flashing gas cylinder icon does not display for

oxygen (O

) detectors.

6. Apply the calibration gas.

7. Apply gas to the sensor at a flow rate of 500

ml/min.

(for NH

, Cl

, and ETO: 1000 ml/min.)

The gas readings change as gas is applied to the

sensor. When the detector senses a sufficient

concentration of gas (approximately 30 seconds), the

audible alarm beeps once.

The detector then begins spanning the sensor as follows:

• NH3, Cl2, ClO2, O3, and ETO: 5 minutes;

• O2: 30 seconds;

• other gases: 2 minutes (approximately).

The audible alarm beeps three times when the span is

complete.

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 LCD

displays an error message.

The detector flashes, vibrates, and emits a long tone and

then automatically proceeds to the alarm setpoint screens.

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BW Technologies GasAlert Extreme User Manual Page 52