Bump Test
WARNING!
| • | Perform a Bump Test before each day’s use to verify proper device operation. |
| • | For PID sensors manufactured from March 2020 to June 2023, a bump test or manual gas check must be performed each time that the unit is powered on. |
Failure to follow these warnings can result in serious personal injury or death.
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Bump test frequency is often stipulated by national or corporate regulations; however, more frequent bump tests is generally accepted as a best safety practice. |
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
NOTE: The GALAXY GX2 cannot test the Chlorine Dioxide sensor. For this sensor, use this Bump Test procedure and/or manually calibrate as described in Calibration.
Equipment
See accessory chapter for ordering information for these components.
| • | Calibration Check Gas Cylinder(s) |
See Calibration Specifications for calibration gas target values and appropriate MSA calibration gas cylinders.
| • | Demand Flow Regulator(s) |
| • | Tubing appropriate for the gases to be tested |
| • | Kits containing tubing and regulators suitable for reactive and non-reactive gases are available from MSA. |
Performing a Bump Test
| 1. | While the device is turned ON in a clean, fresh air environment, verify that readings indicate no gas is present. |
| 2. | From the normal measure 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. |
Depending on the sensors installed, there could be one to five separate Bump Tests performed, each with a different cylinder, regulator, and tubing used.
| 4. | Attach the demand regulator (supplied in the calibration kit) to the cylinder providing the indicated gases. |
| 5. | Connect tubing (supplied in the calibration kit) to the regulator. |
| 6. | Attach the other end of tubing to the device pump inlet. |
| 7. | Press the  button to start the bump test: |
the progress bar advances
the sensors respond to the gas.
The message BUMP TEST PASS indicates a successful Bump Test of the sensors.
If any sensor fails the Bump Test:
| • | the message BUMP TEST FAIL appears |
| • | the failed sensor is indicated. |
If there are more sensors to be Bump Tested, the next sensor displays and the process repeats from Step 4.
If there are no more sensors to be Bump Tested, the tubing can be removed from the device pump inlet.
After the Bump Test
NOTE: Although the check mark will be visible after power cycling or turning on your unit (if bumped within 24 hours), a bump is still required after each time the device is turned on, for PID sensors manufactured between March 2020 and June 2023.
After all installed sensors pass the Bump Test, the Ö symbol displays on the -MEASURE page. This Ö symbol appears on the display in the upper feature bar
If any sensor was not bump tested, or fails the Bump Test, the Ö symbol does not display.
The display:
| • | temporarily shows the Ö symbol at each gas reading for successfully bump tested sensors |
| • | Ö symbol is then replaced by the present gas reading. |
The Ö symbol shows for 24 hours after the Bump Test.
If a sensor fails the Bump Test, calibrate the device as described in Calibration