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6
CALIBRATION
Note…
The meter should only be calibrated outdoors or in a vacuum
calibration box with no formaldehyde present.
Calibration Procedure
1. Press
PWR
to turn the meter
ON
.
2. Press and hold
MODE
for several seconds to
enter Calibration Mode. “CAL” displays and
“00000” flashes.
3. While the meter is calibrating, Temperature
and RH readings will alternate on the display.
The meter will take 5 minutes to calibrate.
4. “Ppm 0.00” and “HCHO” will display to indicate that
calibration is complete.
Note…
To stop calibration and exit Calibration Mode, press and hold
PWR
to turn the meter
OFF
.
SETUP
Meter On and Off
1. Press
PWR
to turn the meter
ON
. The display will cycle
through “0” to “00000” and the meter will take up to 10
minutes to warm up due to the HCHO sensor.
2. Press and hold
PWR
to turn the meter
OFF
.
Backlight
Press
BKLT
to toggle between backlight
ON
and
OFF
.