EX622 Datasheet, PDF (10/15 Pages) Extech Instruments Corporation. – 400Amp True RMS AC Clamp Meter with IR Thermometer

Non-Contact InfraRed Temperature Measurements
1. Rotate the function switch to the IR position.
2. Press the MODE button to select °F or °C.
3. Aim the infrared sensor (rear of the 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 large upper display.
When the IRT button is released the displayed temperature will be held for approx. 10
seconds.
7. Read the MAX temperature in the lower display.
Press the MAX/MIN button to toggle the lower display between the maximum and
minimum measured values.
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 8:1 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 may not make accurate measurements through transparent surfaces such
as 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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EX622 V2.2 07/08