EX570 Datasheet, PDF (9/18 Pages) Extech Instruments Corporation. – True RMS Multimeter with IR Thermometer

NON-CONTACT INFRARED TEMPERATURE MEASUREMENTS
1. Rotate the function switch to the IR position.
2. Press the SELECT button to select °F or °C.
3. Aim the infrared sensor (top of meter) at the surface to be measured.
4. Press the IRT button to turn on the IR thermometer and laser pointer. The laser
pointer identifies the surface spot to be measured.
5. The area of the surface to be measured must be larger than the spot size as
determined by the distance to spot size specification.
6. Read the temperature in the display. When the IRT button is released the displayed
temperature will be held for approximately 10 seconds.
WARNING: Do not directly view or direct the laser pointer at an eye. Low power
visible lasers do not normally present a hazard, but may present some potential for hazard
if viewed directly for extended periods of time.
IR Spot to Distance Diagram
The 30:1 spot to distance ratio determines the size of the measured surface area with
respect to the distance the meter is held away from the surface.
IR Measurement Notes
1. The object under test should be larger than the spot (target) size calculated by the
field of view diagram.
2. If the surface of the object under test is covered with frost, oil, grime, etc., clean
before taking measurements.
3. If an object's surface is highly reflective, apply masking tape or flat black paint to the
surface before measuring.
4. The meter will not make measurements through glass.
5. Steam, dust, smoke, etc. can obscure measurements.
6. To find a hot spot, aim the meter outside the area of interest then scan across (in an
up and down motion) until the hot spot is located.
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EX570-ENG V2.3 3/09