DeWalt DCT414 Instruction Manual page 42

NOMINAL EMISSIVITY TABLE
MATERIAL VALUE
Copper* 0.60
Glass (plate) 0.85
Iron* 0.70
* Oxidized
** Opaque, over 20 mils
CHOOSE ALARM SETTINGS AND HIGH/LOW
TEMPERATURES
1. Engage the trigger to turn the unit.
2. Push the ALM button.
3. When the ALM is flashing on the screen use the up and down
arrows to select the alarm type.
Alarm 1 – temperature has reached the set limit, indicated
by the red/blue LED (M)
Alarm 2 – temperature has reached the set limit, indicated
by a beeper sound
Alarm 3 – temperature has reached the set limit, indicated
by both the LED and the beeper
4. Push the ALM button again to confirm selection.
5. The HAL (high alarm) will now flash. Use the up and down arrows
to select the high temperature limit. When the temperature is
exceeded, the alarm will activate.
6. Push the ALM button. The LAL (low alarm) will now flash. Use the
up and down arrows to select the low temperature limit. When
the temperature has descended, the alarm will activate.
7. Press ALM button again for the main screen.
8. Temperature readings can now be taken.
MATERIAL VALUE
Water 0.93
Wood*** 0.94
*** Natural
**** Factory Setting
DISTANCE TO SPOT (FIG. 5)
IR Thermometers have a "Cone Effect" where the further the
thermometer is from the object, the larger the area being measured.
The IR Thermometer has a 12:1 distance to spot (12:1) ratio, for every
12" (305 mm) away from the object it will measure 1" (25 mm). The
object that is being tested needs to be larger then the spot size to
ensure accurate readings.
FIG. 5
KEY NOTES IF HAVING TROUBLE TAKING MEASUREMENT
1. Make sure to apply masking tape or flat black paint to surfaces
that are highly reflective (use the default 0.95 emissivity setting).
2. Make sure to have the correct emissivity for the material you are
testing. Refer to Emissivity and Nominal Emissivity Table.
3. Clean the material before testing if there is heavy dirt, grease, etc.
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