3.8 Bump Test

WARNING

Perform a Bump Test before each day's use to verify proper instrument operation. Failure to perform this test can result in serious personal injury or death.

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

CSA requires (per 22.2 NO. 152) that the instrument's 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 within this manual.

3.8.1 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
• ALTAIR 4X Calibration Cap.

3.8.2 Performing a Bump Test

1. From the normal measure screen, press the ▼ button to display "BUMP TEST?".
2. 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 Section 3.4.2.

3. Attach the calibration cap to the instrument.

• Insert tab on calibration cap into slot on instrument.
• Press calibration cap as shown until it seats onto instrument.

• Press both side tabs down onto instrument until they snap in.

• Ensure that the calibration cap is properly seated.
• Connect one end of the tubing to the calibration cap.
• Connect other end of tubing to the cylinder regulator (supplied in the calibration kit).

4. Press the button to start the bump test then open the valve on the regulator. The hourglass will flash and the sensors will respond to the gas.

After the Bump Test completes, the instrument momentarily displays "BUMP PASS" or "BUMP ERROR" along with the label of any sensor that failed before returning to Measure mode. If the instrument fails the Bump Test, perform a calibration as described in Section 3.9.

• The √ symbol will be displayed in the Measure mode for 24 hours after a successful Bump Test.