Sper Scientific 800046 Indoor Air Quality Meter - Manual (Page 15)

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RH CALIBRATION
75% Calibration
1. After performing the 33% calibration, plug the sensor
probe into a 75% salt bottle.
2. Press MN/MX/AV o enter the 75% calibration mode.
3. “CAL” and the calibrating value (75.2% if at 25
°
C) blink
on the LCD.
4. The calibration process will be completed in approxi-
mately 60 minutes when “CAL” and humidity stop
blinking.
Note…
Users can also calibrate individually either to 33% or 75%.
To calibrate 33% only, press CAL and exit when 33% cal-
ibration is competed.
To calibrate 75% only, press MODE or DP/WBT within the
first 5 minutes of initializing the 33% calibration process.