Operating Instructions - Extech Instruments 42511 User Manual

Operating Instructions

Temperature Measurements
1. Hold the meter by its handle and point it toward the surface to be measured.
2. Pull and hold the trigger to turn the meter on and begin testing. The temperature
reading, MAX temperature reading, the 'SCAN' icon, the emissivity value, and the unit
of measure will appear.
3. Release the Trigger and the reading will hold for approximately 7 seconds (HOLD will
appear on the LCD) after which the meter will automatically shut off. The only
exception is if the LOCK mode is set to ON.
Note: Select the temperature units (ºF/ºC) using the switch inside the battery
compartment
Field of View
The meter's field of view is 12:1. For example, if the meter is 12" (30cm) from the target
(spot), the diameter of the target must greater than 1" (2.5cm). Other distances are shown
in the field of view diagram (illustrated below and on the side of the meter). Measurements
should normally be made as close to 12" as possible to the device under test. The meter
can measure from greater 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.
Dual Laser Pointer
The dual laser pointers are designed to cross at a
distance of 12" (30cm). The spot size at this distance is
1" (2.5cm) in diameter and this is the recommended
distance to target for most measurements. To turn the
lasers on/off:
1. Press and release the Trigger
2. While HOLD is on the display, press the laser button
once to turn on the lasers on or off.
3. The laser icon will appear in the LCD when the
laser function is enabled.
4. The status of the laser will be stored in memory and
will remain as the ON condition until changed.
@45cm
3.75cm
@30cm
2.5cm
@150mm
12.5mm
5
@18"
1.5"
@12"
1"
@6"
0.5"
42511 V4.2 2/08