Emissivity Setting - Extech Instruments IR320 User Manual

Emissivity Setting

With the meter ON, short press the M button three (3) times to step to the emissivity screen. Use the up/down buttons
to set the desired value (from 0.10 ~ 1.00). Short press the up or down button to add or subtract 0.01 units or long
press to change the units rapidly. The meter will exit the setup mode after five (5) seconds of button inactivity. For
more, see the Emissivity Considerations section.
Unit of Measure Setup
With the meter ON, short press the M button four (4) times to step to the unit of measure screen. Use the up/down
buttons to change the units (
Lasers Enable/Disable
With the meter ON, short press the M button five (5) times to step to the laser screen. Use the up/down buttons to
select ON/OFF. The laser icon
when you pull the trigger (or remain ON in Automatic Measurement mode). The meter will exit the setup mode
automatically after five (5) seconds of button inactivity.
6. IR Measurement Considerations
1. To detect a hot or cold spot, aim the IR thermometer at a region beyond the target and then scan the entire
region in a slow, up/down motion.
2. Distance-to-Spot (D:S) ratio. The meter's field of view is 12:1. For example, if the distance from the meter to
the target is 12 inches, then the diameter of the target will be 1 inch. See diagram below.
3. Make measurements < 2 feet from the target when possible. The meter can measure from further distances
but external sources of light can affect measurements. In addition, the spot size may be so large that it
encompasses unwanted surface targets.
4. If frost, oil, grime, etc., covers the surface of the object under test, please clean before taking measurements.
5. If an object's surface is reflective, apply masking tape or flat black paint to the surface before measuring.
6. The meter cannot make accurate measurements through transparent surfaces such as glass.
7. Steam, dust, smoke, etc. can obscure measurements.
8. The meter compensates for deviations in ambient temperature. It can take up to 30 minutes however for the
meter to adjust to wide ambient temperature changes.
o o
C or F). The meter will exit the setup mode after five (5) seconds of button inactivity.
appears on the LCD when you enable the lasers, indicating that the laser will light
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