UEi Test Instruments AQM4 - Manual (Page 17)

16
RH CALIBRATION
To begin, enter calibration mode. Press
or to select parameters for calibration
and press enter.
The meters default for calibration of
humidity is 33% and 75% salt solution. The
ambient condition is recommended at 70 ~
75°F (25°C) and stable humidity. To cancel
calibration, turn off the meter.
CAUTION:
Do not calibrate the humidity without
default calibration salts. Contact UEi for
calibration salt or for service
33% Calibration
Plug the sensor probe into 33% salt bottle.
Hold down to enter 33% calibration.
"CAL" and calibrating value (32.8% if at
77°F) are blinking on the LCD.
75% Calibration
Plug sensor probe into 75% salt bottle and
enter calibration mode. In calibration mode,
press to select 75% calibration (Fig. 35),
press to start. "CAL" calibrating value
(75.3% if at 77°F) will blink on the LCD.
Meter will begin calibration and finish in
60 minutes when "CAL" and humidity stop
blinking. To cancel the calibration, turn off
the meter at any time.