General Tools and Instruments LTH8809DL - Manual (Page 16)

HUMIDITY CALIBRATION (8808/09)
Please follow below steps to calibrate
the humidity accuracy of the meter.
1.Turn off the meter, plug the meter probe
into 33% salt bottle and press
"START/STOP" +"SET" at the same
time over 2sec to enter to calibration
mode.
2."32.8%" will flash on the monitor.
30 minutes after, the flashing stops to
indicate the calibration of 33% is
finished.
3. Move the meter probe to the 75% salt
bottle and press "START/STOP" over
2 seconds to enter 75% calibration.
4. "75.3%" will flash on the monitor.
5. lashing
stops
means the whole calibration has
been completed and the calibration
data have been saved in memory.
6. After step5, the meter will return to
measurement mode automatically.
30 minutes after, the f
% %
Note:
a)You can exit calibration without
saving by pressing "START/STOP"
>2sec before step 5.
b)To get high accuracy, strongly
suggest you to do the calibration at
23+2 C Temperature environment.
8808
15