Health & Safety

  Confined Space Program: Multi-gas Meter Instructions

Functional Buttons:

Multi-gas buttons On/Off Press black button and hold until display tells you to RELEASE.

Turn on in a clean-air environment.

Mode Press "mode" button at display prompt.
E Button Press (E) button at display prompt.
Alarm Mode Red lights flash and unit beeps.

Beeps are more frequent at higher contaminant levels, or lower oxygen level.

Peak Display Function:

Multi-gas meters Example Display for Peak Mode:

The display reads 2 ppm peak value for CO and 10 ppm peak value for H2S (top line);
15.2 % for oxygen and 0 % for LEL (bottom line).

  • Use the PEAK function to display highest recorded readings for CO, H2S, and LEL, and the lowest reading for O2.
  • Readings are not erased when you turn the unit off. You must use the PEAK CLEAR function to erase the memory.
  • Make sure you check the peak readings have been cleared before you start your monitoring session.
  • Press mode button until display reads "P" (top line), and "K" (bottom line) (see photo).
Multi-gas meters

Peak Clear Function:

  • Use the PEAK CLEAR function to clear peak readings from the internal memory. Readings are not erased when you turn the unit off. You must use the PEAK CLEAR function to erase the memory.
  • Press mode button until display reads "PK CLR PRESS (E) TO RESET". After you press the (E) button, press mode button again until peak reading appears. Unit should now read 0,0 (top line), and 21, 0 (bottom line) assuming this was performed in a clean-air environment.

Zero Function and Calibration Function:

  • Zero and Calibration Functions are performed by Dan Walker as specified by the manufacturer.
  • Special equipment and experience is necessary to properly perform these functions. Please notify Dan Walker if you experience any problems or malfunctions with the multi-gas meter.

Documentation and Training:

  • Make sure you are familiar with all of our confined space entry equipment, including the multi-gas monitor, before use.
  • Make sure to document your air monitoring data (e.g., peak values and other relevant data) on the Confined Space Air Monitoring Data Form.
  • Additional multi-gas monitors are maintained by Facility Services, the Department of University Safety & Assurances and the Power Plant.
  • Contact Robert Grieshaber or Dan Walker if you require either initial or refresher training or if you have any questions regarding policies or equipment use.


Multi-gass Meter Instructions 1

 Location of gases on display.

Multi-gass Meter Instructions 2

 Example of a clean air display.

Carbon monoxide (CO) and hydrogen sulfide (H2S) are in ppm;
oxygen (O2) and lower explosive limit (LEL) readings are percentage values.

The battery-life indicator is just right of the oxygen display (i.e., 20.9);
each line represents about one hour of service remaining.