General Tools and Instruments CIH20DL User Manual

Page 10

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 display). 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 return 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 thermometer. 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 measurements

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 word 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

measurement 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. Pressing 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.

Temp

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