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press the yellow button (Fig. 2, Callout G) once to choose 5°F (3°C) or twice to
6. To change the setpoint bandwidth while continuing to operate in Scan Mode,
choose 10°F (5.5°C). Note that the setpoint bandwidth indicator (Fig. 2, Callout F)
moves to track your change(s).
7. To change the reference temperature, you must first power off the IRTC50 by
pressing and holding the green C/F button (Fig. 2, Callout H). Then repeat Steps 1
and 2.
CONVENTIONAL IRT MODE
1. Power on the IRTC50 by squeezing and holding the yellow measurement trigger.
2. When the LCD illuminates, exit Scan mode (the instrument's default state at
power on) by pressing the yellow
indicator (Fig. 2, Callout F) above the word OFF.
3. In Conventional IRT mode, the light panel will remain dark as you measure and
display absolute temperatures without relating them to a reference. The beeper
will sound once and the word SCAN will appear each time you squeeze the
trigger to make a measurement.
4. To change the measurement unit from the default °F to °C, briefly press the
C/F button (Fig. 2, Callout H). To return to Fahrenheit units, press the button
again.
OPERATING TIPS
The first few times you use the IRTC50 in Scan mode, don't be too concerned about
which setpoint bandwidth to choose. With experience you will learn whether a
narrow (1°F), normal (5°F) or wide (10°F) setpoint bandwidth is best for your
particular application. As part of your education, experiment with the setpoint
bandwidth. For example, widen it from 1°F to 5°F and note that some targets that
caused the light panel to glow red before produce green lights now.
Remember that the reference temperature you acquire and the setpoint bandwidth
you choose disappear if you allow just one minute to go by without pulling the
trigger. For this reason, you can expect to repower the IRT often.
Practice using the Star Burst laser to define the size of your targets with the goal of
improving your measurement accuracy. The diameter of the Star Burst is about half
that of the overall spot diameter. For best results, move close enough to the target
so its diameter appears about twice the diameter of the Star Burst.
The IRTC50 cannot make accurate measurements if there is glass or plastic
between it and the target.
When the ambient temperature exceeds the IRTC50's maximum operating
temperature (104°F/40°C), the beeper will sound quickly (at 2 Hz) and the display
will show the following error message: ErAH.
button once to move the setpoint band
7
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