Extech Instruments 42529 User Manual page 3

Operating Instructions
1. Hold the meter by its Handle Grip and point it toward the device whose temperature is
to be measured.
2. Press and hold the red Trigger to turn the meter on and begin testing. The display will
light if the battery is charged. Replace the battery if the display does not light.
3. While continuing to press the Trigger, push the red Laser button to turn on the laser
pointer. Aim the red beam approximately a half inch higher than the point of test as
shown in the diagram below (pressing the Laser button again turns the laser off).
4. While measuring, the SCAN display icon will appear on the LCD above the
temperature measurement and to the left of the emissivity value (fixed at 0.95.).
5. If the measurement exceeds the useable temperature range (0 to 600
emit a tone and the LCD will display 'OVER'.
6. Release the Trigger when the temperature stabilizes. The HOLD display icon will
appear on the LCD indicating that the reading is being held.
7. Set the temperature units (
8. Press the yellow Backlight key to turn on the LCD backlighting function.
9. The meter will automatically power down after 7 seconds.
Field of View
The meter's field of view is 6:1. For example, if the meter is 30.4cm from the target (spot),
the diameter of the target must be at least 5.08cm. Other distances are shown below in the
field of view diagram.
Note that measurements should normally be made less than 60.9cm from the target. The
meter can measure from further distances but the measurement may be affected by
external sources of light. In addition, the spot size may be so large that it encompasses
surface areas not intended to be measured.
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C or F) using the blue C and
3
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F), the meter will
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F buttons.
Model 42529-EU V2.0 5/09