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SETUP INSTRUCTIONS
INSTALL BATTERY
The IRTC50's battery compartment (Fig. 1, Callout D) is below the trigger and
accessible from the front of the grip. Before installing the "9V" battery included in
the blister pack, remove the plastic covering its terminals.
To install the battery:
1. Open the battery compartment by placing your thumb and forefinger in the
indentations on the sides of the grip and pulling the top of the compartment
forward.
2. Plug the "9V" battery into the wired socket inside the compartment. The
terminals of the battery and the socket mate in only one way, with the smaller
male terminal plugging into the larger female terminal.
3. Close the battery compartment cover by pushing its top against the grip until the
cover snaps shut.
OPERATING INSTRUCTIONS
SCAN MODE
1. Point the IRTC50 at an interior wall of the room you are in. (If the LCD does not
illuminate, the battery is dead and must be replaced; see above for instructions.)
2. Squeeze and hold the yellow measurement trigger for more than three
seconds, until the light panel on the top of the unit glows green. The unit will
acquire the temperature of the wall as a reference and select 1°F (0.5°C) as the
default setpoint bandwidth. The wall's temperature and the word SCAN will be
displayed on the LCD in large digits below the reference temperature, indicated
by the text REF. Until you aim at another surface, the light panel on the top of the
IRTC50 will continue to glow green to indicate that the target's temperature is
within 1°F (0.5°C) of the reference temperature.
3. Keep squeezing the trigger as you scan other surfaces or objects in the room.
Aim at a lit lamp or overhead light and watch the color of the light panel change
from green to red. Red indicates that the lamp or light is at least 1°F (0.5°C)
hotter than the wall. Hear the beeper sound.
4. Keep squeezing the trigger as you scan the interior of your refrigerator or a
register of an operating air conditioner. Watch the color of the light panel change
to blue, indicating that the new target is at least 1°F (0.5°C) cooler than the wall.
Hear the beeper sound, but more slowly than before.
5. Release the trigger and watch and wait. The word SCAN will disappear from
the LCD, but the reference temperature and the last measurement will remain.
After 15 seconds, the LCD backlight will silently turn off while both temperature
readings remain visible. After 60 seconds, the unit will sound two beeps and
power off to extend battery life.
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