MicroRAE User’s Guide
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6.
The bump test is now complete. Press [MODE] to exit to the next bump or calibration
type in the Calibration menu. (Press [MODE] several times until you see “Exit,” and then
press [Y/+] to continue through other menu options.
If all the alarms and all sensors have passed and no sensor is due for a calibration, the
instrument is now ready for use.
11.2.
Zero Calibration
This operation sets the zero point of the sensor calibration curve for clean air. It should be
performed before other calibrations.
Note:
If you use a zero air cylinder, you must use the MicroRAE Calibration Adapter. Using a
calibration adapter is not necessary for calibration in fresh air.
11.2.1. Zero Calibration
This procedure determines zero points of most sensors. The MicroRAE should be zero-calibrated
in clean air with 20.9% oxygen or with a cylinder of clean zero air.
At the Calibration menu, select “Fresh Air” by pressing [Y/+] once to enter fresh air calibration.
After a timer countdown, the zero calibration is done. The LCD displays the sensor names and
tells you whether each calibration passed or failed, followed by the sensor readings.
Note:
You can abort the calibration at any time during the countdown by pressing [MODE].
11.2.2. Single-Sensor Zero Calibration
Select the sensor and then start the calibration by pressing [Y/+]. You can abort the procedure
anytime by pressing [MODE].
