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計測機器 Amprobe THWD-5のPDF ユーザーマニュアルをオンラインで閲覧またはダウンロードできます。Amprobe THWD-5 8 ページ。 Relative humidity temperature meter

CALIBRATIoN

Make sure the THWD-5 is turned off. plug the meter's probe into a known trusted 32.8%

salt bottle. press "on/off + F/C" pushbuttons simultaneously for more than one second to

enter the calibration mode.

3x.x% will be flashing on lCD (see fig.1). After 30 minutes the "3x.x%" will stop flashing.

The calibration for the "3x.x%" is now completed. proceed with the 7x.x% calibration.

Remove the meter from the 32.8% salt bottle and place it into a 75.3% salt bottle.

press Min Max Reset pushbutton for more than one second to enter the7x.x% calibration

mode. "7x.x%" will be flashing on lCD. After 30 minutes the "7x.x%" will stop flashing.

The calibration process is now complete.

Note:

•

Auto power off is automatically disabled during calibration procedure.

•

in order to get high accuracy, you must do the calibration at a 23

airflow in the room.

•

if the value differs from 7x.x% or 3x.x% for more than 0.3%, the calibration fails .(see

trouble-shooting)

•

Make sure the time of pressing the on/off pushbutton is more than 100 ms.

•

Check the batteries are in place, good contact and correct polarity.

•

Replace the batteries and try again.

•

Check whether the low battery indicator displayed before display disappeared. if yes,

replace the batteries.

•

Turn on the meter by pressing "

fig. 1

on/off + Hold" key to disable auto power off.

± 2°C (73 ± 2°f) and steady