Bump (Functional) Testing (Single Bump Or Multi Bump) - Rae microrae User Manual

11.1.1. Bump (Functional) Testing (Single Bump or Multi Bump)

The same gas is used for a bump test as for calibration. A constant-flow regulator producing 0.5
liters per minute (1 liter per minute for HCN sensors) should be used, and the calibration adapter
must be installed. The instrument must be connected to a cylinder of calibration gas with supplied
tubing.
1. Turn on your MicroRAE by pressing and holding the [MODE] key, and allow the
instrument to boot up fully until the main measurement screen with sensor names and
readings is shown.
Important! Make sure all of the instrument's sensors have warmed up before performing a
bump test. The instrument will take the time to warm up the sensors prior to enabling access
to bump test menus. You can tell a sensor has warmed up if you see a reading next to it name
on the display. If it has not warmed up, you see three dashes ("--") next to it.
2. Install the calibration adapter on the MicroRAE by setting it on over the sensors and
turning the knob until it is snug against the surface of the instrument.
3. Turn on the gas to initiate flow.
4. Connect the calibration adapter to the calibration gas.
5. Press Start ([Y/+] key) to start the bump test, or press [MODE] to quit. While the bump
test is being performed, the readings for each sensor are shown. Once the bump test
completes, pass/fail test results and readings are shown for each sensor.
Important! If one or more sensors fails a bump test, be sure to calibrate those sensors.
MicroRAE User's Guide
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