Bump Test

WARNING! 

Perform a Bump Test before each day’s use to verify proper device operation.

Failure to perform this test can result in serious personal injury or death.

Bump test frequency is often stipulated by national or corporate regulations; however, bump testing before each day’s use is generally the accepted best safety practice and is therefore MSA’s recommendation.

This test quickly confirms that the gas sensors are functioning. Perform a full calibration periodically to ensure accuracy and immediately if the device fails the Bump Test. The Bump Test can be performed using the procedure below or automatically using the GALAXY GX2 Test Stand.

CSA requires (per 22.2 NO. 152) that combustible sensor sensitivity be tested before each day's use on a known concentration of methane equivalent to 25 to 50 % of full scale concentration. ACCURACY MUST BE WITHIN 0 to +20 % OF ACTUAL. Correct accuracy by performing the calibration procedure described in Calibration.

Equipment

See accessory section for ordering information for these components.

• Calibration Check Gas Cylinder
• 0.25 liters/min. Flow Regulator
• 1/8” ID Superthane Ester Tubing
• Calibration Cap

Performing a Bump Test

1. Connect the regulator to the Calibration Check Gas Cylinder.
2. From the Normal Operation screen press the q button to display “BUMP TEST?”.
3. Verify the gas concentrations displayed match the Calibration Check Gas Cylinder. If they do not, adjust the values through the Calibration Setup menu as described in Device Setup.

4. Attach the calibration cap (see Attach the Calibration Cap
5. Press the button to start the Bump Test. If calibration lockout option is selected, enter password. The hourglass will flash and the sensors will respond to the gas.

6. Open the pressure reducer valve on test gas cylinder.
7. Close the valve after bump testing.

After the Bump Test completes, the device momentarily displays “BUMP PASS” or “BUMP ERROR” along with the label of any sensor that failed before returning to Normal Operation mode. If the device fails the Bump Test, perform a calibration as described in Attach the Calibration Cap.

The Ö symbol will be displayed in the Normal Operation mode and the Bump LED will flash green for 24 hours after a successful Bump Test.