To display the minimum RH and ambient
temperature
values measured since the
meter was powered on, press the
MAX/MIN
button again. The text
MIN
will replace
MAX
at the right of the RH readout and both
readouts will indicate the lowest values
(of RH and ambient temperature) measured
during the current session.
To return to displaying real-time RH and
ambient temperature readings, press the
MAX/MIN
button a third time. The text
MIN
will disappear from the RH readout. Exiting
Min/Max mode clears the Min/Max memory
and begins a new measurement session.
CALIBRATING THE METER
Your EP8709 was calibrated at the factory,
so its measurements should remain within
their specified tolerance for several years.
However, you can re-calibrate the unit
yourself to reassure yourself of the
accuracy of readings, especially after the
instrument has been operated for many
hours in a dusty environment.
To calibrate the EP8709, you must use
two jars of standard calibration salt: one
containing a 33% solution of MgCl and the
other a 75% solution of NaCl. Both are
available for purchase from General as
part numbers SKUs HR33 and HR75.
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