Bump Testing and Zeroing the BW Clip4

Bump Test

Bump testing is the process of briefly exposing the gas sensors to a known concentration of calibration gas that is greater than the low alarm threshold. This is the only way to verify the proper operation of the gas detector.

NOTE

Honeywell Analytics provides a quad gas mixture for accurate bump tests and calibrations. Use the quad gas mixture rather than a single gas.

The cylinder symbol appears with the flashing non-compliance symbol when the bump test is overdue.

Use this procedure to do a bump test.

1. Connect a cylinder of calibration gas to the gas detector using the calibration cap. For details about how to use the calibration cap, see Calibration Cap

2.Press the button twice in succession to get into the menu, skip ahead to to by briefly pressing the button, and then press and hold the button to initiate a bump test

3. appears as the detector beeps, flashes and vibrates to test the function of audible, visual and vibrating alarms. When appears, press and hold the button for 1 second to acknowledge the test. To fail this test, briefly press the button.

4.When appears with a 60-second countdown, apply the calibration gas to the detector at a flow rate of 250 to 500 ml/min before the countdown is completed.

To cancel this bump test, briefly press the button.

5.Verify that the gas reading is the same as expected.

6.When appears, close the cylinder valve.

7.When the bump test is successfully completed , appears. If it fails , appears with the flashing non-compliance symbol .

8. appears with the number of remaining days until the next bump test.

9.Remove the calibration cap from the detector.

If repeated attempts continue to fail, perform a calibration.

Zeroing the Gas Detector

Because usage environments vary, there are many factors that may affect the performance of the gas detector, including temperature and humidity changes as well as dust. If the ambient air is not clean, gas readings might be inaccurate. For optimal performance, zero the gas detector once every 24 hours or after changing of environmental conditions.

Make sure that the ambient air is clean and free of hazardous gases before starting this zeroing procedure.

1.Press the button twice in succession to get into the menu, skip ahead to by repeatedly pressing the button, and then press and hold the button to initiate a zeroing process.

2. appears with the flashing zeroing symbol . Wait until this zeroing process is completed.

3.When the zeroing process is successfully completed, appears.

If repeated attempts continue to fail, contact Honeywell Analytics or your distributor for technical assistance.