Operation; Relative Humidity And Temperature Measurements - Extech Instruments RH10 User Manual

Operation
Power
Press the Power
when prompted, check that a fresh 9V battery is installed in the rear battery compartment. To
conserve energy, the meter switches OFF automatically after 30 minutes of inactivity.
Relative Humidity and Temperature Measurements
1. Switch the meter ON.
2. Hold the probe in the area to be tested & allow adequate time for readings to stabilize.
3. Read the Relative Humidity measurement in %RH units at the center of the LCD.
4. Read the Air Temperature in degrees C or F on the lower display digits.
NOTE: Do not immerse the probe in liquid; it is intended for use in air only.
o o
F/ C units selection
1.
Ensure that the meter is switched OFF.
2.
Open the battery compartment by carefully sliding the rear compartment cover downward.
3.
Remove the battery from the compartment. The battery can remain connected to the
red/black wires but it must be physically removed from the compartment cavity.
4.
The unit of measure can be changed using
printed circuit board accessible through an opening in the battery compartment. See the
Description section of this manual for the location of the opening.
5. With good lighting, locate the switch visually. Then use a non-conductive screwdriver or other
tool to toggle the switch left or right. The switch is labeled in the battery compartment. If the
label is removed, move the switch to the left for degrees F and to the right for degrees C.
6. Place the battery back in the compartment as detailed in the battery replacement section.
7. Switch the meter ON and verify that the LCD display shows the desired unit of measure.
MAX‐MIN Recording
1. Press the MAX‐MIN button to display the highest readings (maximum) recorded. The
readings shown will be the highest readings measured since the meter was switched ON. The
MAX icon will appear at the top of the LCD.
2. Press the MAX‐MIN button again to display the lowest readings (maximum) recorded. The
readings shown will be the lowest readings measured since the meter was switched ON. The
MIN icon will appear at the top of the LCD.
3. Press the MAX‐MIN button again to switch the display back to real time measurement
indicator mode. The MAX and MIN icons will switch OFF.
LCD Backlight
The LCD backlight switches ON automatically when the ambient light dims below the threshold.
The ambient light sensor is located directly above the LCD window. To test the backlight, cover
the ambient light sensor and the LCD backlight should immediately switch ON.
button to switch the meter ON or OFF. If the meter does not switch ON
the surface mount selector switch located on the
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