Amprobe TH-3, User Manual, Page: 6 / 65

3
Operating Instructions
Power-Up
•
Press the
�
key to turn the Humidity/Temperature meter ON or
OFF.
Selecting Temperature Units
When the meter is first powered on, the default scale setting is set
to the Celsius (°C ) scale. To change to Fahrenheit (°F) press the
�
button. Press again to revert to Celsius. The next time the meter
is turned on, the scale setting will be the same as it was when you
powered off last time.
Data-Hold Operation
The present reading may be held on the display by pressing the
�
button. When the held data is no longer needed, release the data-
hold operation by pressing the
�
button again. When the meter is
in the Data Hold mode, the
�
,
�
, and
�
buttons are disabled.
Relative Operation
Pressing the
�
button causes the meter to memorize the present
reading. The difference between the new reading and the memorized
data will be displayed. Press the
�
button again to exit the Relative
mode.
MIN/MAX Operation
Pressing the
�
button places the meter in the MIN/MAX mode.
In this mode the maximum value and minimum value is kept in the
memory simultaneously and updated with every new data reading.
Pressing the
�
button displays the MAX indicator and the Maximum
value on the display. Pressing
�
again will display the MIN indicator
and the Minimum value on the display. Pressing
�
again causes
the MAX and MIN indicators to blink together. This means that these
data have been updated in the memory and the reading is the present
temperature and humidity. When the meter is in MIN/MAX mode, the
�
and
�
buttons are disabled. To exit MIN/MAX mode, press and
hold
�
for two seconds.