MEASURING SURFACE TEMPERATURE
To use the meter’s IR thermometer to measure the surface temperature of an object
from a distance, make sure the meter is in “normal” measurement mode, with the
primary (middle) readout tracking air speed or airflow volume and the tertiary (lower)
readout tracking air temperature. Then make sure the laser pointer is enabled (indicated by
the icon at the top of the displa
y). It may be necessary to press the button once or
twice to enable the pointer.
With the laser pointer enabled, point the top of the meter at an object or surface and press
the button. The IR thermometer will measure the surface temperature and show it on the
secondary (upper) readout. Note that releasing the button turns off the laser pointer and
causes the measurement to be held (indicated by the retu
rn of the HOLD icon above the
measurement). All IR temperature measurements are automatically held on-screen until the
button is pressed again or the meter is powered off—whichever comes first.
To improve your surface temperature measurements, learn to determine how close to the
target the CIH20DL must be so the area whose temperature you wish to measure is within
the spot area of the meter’s IR thermo
meter. Refer to the Appendix, which begins on p. 24,
for the theory and practice of making accurate IR measurements.
HOLDING AND STORING MEASUREMENTS
To hold any pair of measurements (air speed + temperature or airflow + temperature) made
by the sensors in the probe head, press the button. This will freeze the value shown on
the primary readout and cause the HOLD icon to appear above it. Held measurement
s
are erased when the meter is powered off
To release the hold, press the button again.
The CIH20DL contains enough nonvolatile memory to store nine sets of three readings (air
speed or airflow volume, air temperature and surface temperature. To store a set of three
measurements, first make sure the meter is in “normal” measurement mode or
measurement hold mode. Then note the number to the right of the w
ord DATA at the lower
left of the display and briefly press the button. Doing so will store the values shown by all
three readouts in the indicated memory location and then advance the location counter by
one. The new number (DATA X +1) is the memory location that will be used the next time the
button is pressed.
While the readings are being stored, the meter will continue to operate in normal
measuremen
t mode. In contrast to held readings, readings stored in nonvolatile memory are
not erased when the meter powers off. However, a reading will be overwritten if its memory
location is next in the queue when the button is pressed.
DISPLAYING MAXIMUM, MINIMUM AND AVERAGE VALUES
The MODE SET button is the gateway to two multi-option menus. The menu that opens
depends on how long you press the button. Pressin
g the MODE SET button briefly lets you
choose to display values other than real-time measurements on the three readouts. Pressing
and holding the button opens up the Advanced Settings Menu, which is detailed in the next
section, beginning on p. 12.
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