PM400 Multi-Gas Personal Monitor
REV – 2.0
[34-2900-0206-2 ]
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P a g e
5
Bump Test
A bump test is used to test that the monitor is working properly. During a bump test, a known concentration of gas
is applied to the sensor to verify that the sensor responds to the gas, and the alarms activate. This is the only way to
effectively confirm that all characteristics of the monitor and the sensor are working correctly.
WARNING
A bump test should be conducted before each day’s use.
Ensure that you are in a clean environment before performing a Bump Test.
The monitor must be calibrated if it fails a Bump Test.
To perform a Bump Test:
1.
On the Measuring screen, make sure the oxygen sensor reads 20.9 and the other gases read zero.
2.
Clip the calibration cap to the unit. The cap attaches to the recesses in either side of the unit. You should
hear a click when the cap is secure.
NOTE: Be sure that the word “Calibration” is right-side-up.
5–1 Calibration Hood
3.
Ensure that the regulator is firmly attached to the gas bottle and that the hose is securely attached to the
regulator and to the calibration cap.
NOTE:
Do not turn on the gas at this time.
4.
From the Main screen, press the [Function] key to advance to the Calibration screen. The calibration icon
and the Calibration gas settings are displayed. Typical readings clockwise from the upper left are 50,18.0,25,
and 100.
