3 42520es Ver. 1.7 8/00
5. NON-CONTACT IR MEASUREMENT OPERATION
5.1 Meter Power
Power the meter by pressing the ON/HOLD key. The meter powers down automatically,
approximately 5 seconds after the ON/HOLD key is released.
5.2 Taking Measurements
Press the Measure key to take a reading. Read the measured temperature on the LCD.
5.3 Selecting Temperature units (C/F)
Select temperature units (degrees C or F) by first pressing and holding the ON/HOLD key
and then pressing the C/F key momentarily until the desired units are shown on the LCD. The
units character will blink on the LCD while programming. Release all keys when completed.
5.4 Data Hold
This meter automatically holds the last temperature reading on the LCD for five seconds after
the MEASURE key is released. No extra key presses are necessary to freeze the displayed
reading.
5.5 Backlit LCD
To turn the LCD backlight ON, press and hold the ON/HOLD key and then press the
BACKLITE key. Repeat this procedure to turn the backlight OFF.
5.6 Laser Pointer
To turn the laser pointer ON, press the LASER key while pressing and holding the ON/HOLD
key. Repeat the procedure to turn the laser OFF.
5.7 Measurement Considerations
a. Holding the meter by its handle, point the IR Sensor toward the object under test.
b. The object under test should be larger than the target size calculated in Fig. 2 Section
6.1 (or chart on top of meter).
c. The meter automatically compensates for temperature deviations from ambient
temperature. Keep in mind that it will take up to 30 minutes to adjust to wide ambient
temperature changes.
d. When low temperatures are to be measured followed by high temperature
measurements, some time (several minutes) is required before the high temperature
measurements can be made accurately.
6. IR MEASUREMENT TECHNIQUES
6.1 Measurement Field/Distance
The object being measured must be at least as large as the required target size calculated
by the field/distance ratio nomogram shown in Fig. 2 and on top of the meter.
