EA25 v3.1 8/13
4
Operation
Turn Power ON or OFF
1. Press the button to turn the meter on or off. The meter will perform a short self-test when
turned on.
2. The meter automatically turns off after 30 minutes of inactivity unless the MX/MN or Datalogging
modes are active.
Taking Measurements
1. Hold the probe in the air in the area to be tested. Do
NOT
immerse in liquid.
2. Allow adequate time for readings to stabilize.
3. Read the measurements on the LCD. The bargraph tracks the large digit display.
4. The
%RH/TEMP
button allows the user to choose whether the temperature or the humidity is
displayed on the large digit display.
Selecting temperature units of measure (C/F)
Press the
o
C/
o
F
button momentarily to toggle the temperature units.
Maximum and Minimum recording (MX/MN)
NOTE:
The Automatic Power OFF feature will be disabled while in the MX/MN mode.
The MX/MN mode allows the user to view only the highest and lowest readings while taking
measurements. (MX stands for maximum and MN for minimum).
1. Press the
MX/MN
button momentarily to start the elapsed timer and begin recording. The display
will now show only the highest reading (the MX icon will appear).
2. Press the
MX/MN
button again to view the lowest reading (MN will appear).
3. The
SET
button allows the user to view the elapsed time for a particular MX or MN reading in
Minutes:Seconds
(59mins:59secs max)
or Days:Hours (99days:24hours max).
4. To check the highest and lowest Dew Point or Wet Bulb temperatures, use the
DEW
and the
WET
buttons.
5. The following data displays are available in the MX/MN mode:
Maximum and Minimum Humidity with the associated Temperature
Maximum and Minimum Temperature with the associated Humidity
Maximum and Minimum Dew Point temperature with the associated Temperature or Humidity
Maximum and Minimum Wet Bulb temperature with associated standard temperature or
humidity
6. To exit MX/MN mode, press and hold the
MX/MN
button (the MX/MN icons disappear).
Data Hold
Press the
H
button momentarily to freeze the displayed reading. The 'H' icon will appear on the
upper left-hand side of the display. Press the
H
button again to return to normal operation (the 'H'
hold icon will disappear).
DEW POINT and WET BULB Temperature Display
Dew Point and Wet Bulb temperatures are calculated by the meter based on humidity/temperature
measurements. To view the Dew Point or Wet Bulb temperatures, press the
DEW
or
WET
button
momentarily. The ‘DEW’ or ‘WET’ display icon will appear on the right side of the LCD and the
temperature will display on the bottom (larger) digits. The upper (smaller) digits will display the
regular temperature in
o
C or
o
F or the humidity in RH% (use the
%RH/TEMP
button to toggle
between the two).
