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4.4 Indoor Thermo-Hygrometer-Barometer Transmitter
The indoor thermometer, hygrometer and barometer measures and displays the indoor temperature,
humidity and pressure and transmits this data to the receiver.
Figure 11
Note: Do not install the thermo-hygrometer-barometer transmitter outside. This will cause errors in
the barometric pressure due to large variations in temperature (barometric pressure is temperature
compensated for accuracy). Note that pressure readings made inside your home, business, or facility
will correspond closely to the actual barometric pressure outside.
Note: The thermo-hygrometer-transmitter transmits directly to the receiver. For best results, place
between 2 to 8 meter from the receiver.
Note: To avoid permanent damage, please take note of the battery polarity before inserting the
batteries.
Remove the battery door on the back of the sensor with a Philips screwdriver (there is only one screw, at
the bottom of the unit). Insert two AAA batteries, as shown in Figure 12.
Replace the battery door and set screw. Note that the temperature, humidity and barometric pressure
will be displayed on the LCD display. Looking at the back of the unit from left to right, the polarity is (-) (+)
for the top battery and (+) (-) for the bottom battery.
Figure 12
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