immediately begin reading out humidity and
ambient temperature measurements made
by the sensors at the top of the unit.
To display the dew point temperature
(instead of ambient temperature) on the lower
readout, press the
DEW
button. The reading
will be accompanied by the symbol
DEW
at
its left. To return to displaying ambient
temperature, press the
DEW
button again.
To display the wet bulb temperature
(instead of ambient temperature) on the
lower readout, press the
WBT
button. The
reading will be accompanied by the symbol
WBT
at its left. To return to displaying
ambient temperature, press the
WBT
button
again.
By default, the EP8709 displays ambient,
dew point and wet bulb temperatures in °F.
To switch to °C
, press the
F/C
button.
To hold a pair of readings (RH + ambient/
dew point/wet bulb temperature), press the
HOLD
button. The text
HOLD
will appear at
the right of the RH readout. To “unfreeze”
the display and resume showing real-time
readings, press the
HOLD
button again. This
will cause
HOLD
to disappear from the RH
readout.
Pressing any button turns on the green
backlight for 10 seconds.
To extend the life of the “9V” battery
powering the EP8709, the unit’s Auto Power
8