How To Bump Test An RKI GX2009 4 Gas Monitor

How To Bump Test An RKI GX2009 4 Gas Monitor


Hey guys, we hope you found our last video on the RKI GX-2009 to be helpful to you when trying to get your gauge up and running quickly. Now that you have your monitor operable, we should take a few minutes to learn how to properly do a bump test on the RKI GX-2009 4 gas personal monitor.

The first thing that you need to do is to make sure that you have the BUMP option turned on on your monitor, from the factory the BUMP option is turned off. The first step is to enter the BUMP menu, this will allow you to test all 4 channels simultaneously to ensure that the instrument is responding properly to gas.

Performing a bump test will require the use of a calibration kit which consists of a 4-gas calibration cylinder, a 0.5 LPM regulator, a calibration cup and some non-absorbent sample tubing. The standard 4 gas cylinder used for this testing will consist of 50% LEL methane, 12% oxygen, 25ppm H2S, 50ppm CO and a balance of nitrogen.

Before we can do a bump test, we must first do a fresh air adjustment. We covered this in our previous video on the GX-2009 if you may need help with that as well.

  1. At the bump screen, press and release the POWER MODE button. A screen will appear showing you the gas concentrations that the GX-2009 is expecting you to use.
    • If the values are not correct, you can change them by changing the AUTO CAL gas values in calibration mode or usert setup mode or by using the data logger management program or the user setup program. To exit this screen and return to the main menu, press and release the AIR button.
  2. Use the sample tubing to connect the calibration cup to the regulator. Attach the tubing to the calibration cup on the inlet side.
  3. Confirm that the regulator on/off knob is turned all the way clockwise and is closed. Now, screw the calibration gas cylinder onto the regulator.
  4. Push the calibration cup onto the GX-2009 sensor face. Make sure that the cup is oriented with the sensor names on the cup matching up to the sensor names on the instrument.
  5. Press and release the POWER MODE button. The LCD display will display the current gas readings and the instrument will begin counting down from 30.
  6. Turn the regulator on/off knob counterclockwise to open it. Calibration gas will begin to flow.
    • If you wish to cancel the bump test because it is a fail, press and hold the AIR button until you get back to the BUMP screen
  7. When the bump test countdown reaches ZERO, the unit will determine the results of the bump test.
  8. Depending on how the unit is set, you will see one of two outcomes. Your monitor can be set 2 ways “CALIBRATION AFTER BUMP TEST HAS FAILED” can be turned off or on.
    • If it is set to off, the instrument will display which channels pass or failed the bump test.
    • To view the bump test gas readings, press the AIR button.
    • To get back to the BUMP screen, press POWER MODE. You can also press POWER MODE to get to the BUMP screen without viewing your results.

Make sure after your testing is completed to turn off your regulator with the counter clockwise motion. We hope you have found this video to be helpful in bump testing your RKI GX2009 4 gas personal monitor. If you would like to rent, purchase or have your meters serviced please give us at JM Test Systems a call!