Calibration

Calibration is performed to adjust the sensitivity levels of sensors to ensure accurate responses to gas.
This calibration procedure is written as the procedure is intended. If an error or alarm screen displays, refer to Calibration Troubleshooting in the GasAlertQuattro Technical Reference Guide.

Cautions

Calibrate only in a safe area that is free of hazardous gas in an atmosphere of 20.9% oxygen.
If performing single gas calibration, calibrate O2 first.

Note

The maximum hose length for calibration is 3 ft. (1 m).
The following steps are written for use with a standard quad gas cylinder.
Calibration can only be aborted after the sensors have been zeroed. If is pressed to abort, CALIBRATION cancelled displays.

1. Press and hold as the detector performs the Powering off countdown.

If the IR Lock option is enabled, the following screen displays to indicate calibration can only be performed using an IR device (MicroDock II or IR Link).

4. When the following screen displays, attach the calibration cap and apply calibration gas at a flow rate of 250-500 ml/min. Refer to Connecting the Gas Cylinder to the Detector.
If a sensor is not yet due for calibration, its box will have a greyed out checkmark.

5. The detector initially tests for gas. When a sufficient amount of gas is detected,displays beside each gas that is detected.

8. When calibration is complete, the following screen displays.

Note

The calibration due date cannot be reset for a sensor that fails calibration. If a sensor fails or an error screen displays, refer to Calibration Troubleshooting in the GasAlertQuattro Technical Reference Guide.

9. All successfully calibrated sensors a Interval field in Fleet Manager II.

The calibration due dates can be changed in Fleet Manager II.

10. The detector now enters normal operation.

Continue holding when OFF displays and the detector briefly deactivates.

2. The detector activates again and performs the calibration countdown. Continue holding until Starting Calibration displays.

3. The detector enters the zero function. zeroing displays while the detector zeros all of the sensors.

Cautions

If a sensor fails to zero, it cannot be calibrated. Refer to Startup Self-Test Troubleshooting in the GasAlertQuattro Technical Reference Guide.

6. The detector then begins following activities occur during the span:

calibrating displays at the bottom of the screen.
Gas values adjust during the span.
Target gas values that are defined in Fleet Manager II display above or below the adjusting gas value.

To abort calibration after the sensors have been zeroed, press.

7. When the following screen displays, close the valve on the gas cylinder and remove the calibration cap from the detector.

A check mark displays beside each sensor that has calibrated successfully.

Bump Test

A bump test applies test gas to force the detector into alarm. A bump test must be performed regularly to confirm the sensors are responding correctly to gas, and that the audible, visual and vibrator alarms activate during an alarm condition.

Cautions

BW recommends to bump test the sensors before each day