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7. °F temperature unit
8. °C temperature unit
9. Low power indicator
10. Holding indicator
11. Measurement indicator
ATE-2533: (Temperature alarm)
1. Laser-On Indicator
2. Holding indicator
3. The first temperature display
4. Average value indicator
5. MAX/MIN indicator
6. Temperature alarming indicator
7. The second temperature display
8. °F temperature unit
9. °C temperature unit
10. Low power indicator
11. Emissivity display
12. Measurement indicator
5. MEASUrEMENT PrINcIPLE
Infrared thermometers detect infrared energy emitted by objects. The instrument focuses energy through its lens,
changing the temperature of a special material that creates an electrical signal. A microcomputer processes this signal
and displays the output on the panel of the thermometer. The laser is used only for sighting the instrument and has no
other effect on temperature measurement.
6. MEASUrEMENT METhOD
1. To measure the temperature of an object, aim the unit at the object and press the trigger. As long as you hold
the trigger, you can measure temperature continuously. After releasing the trigger, the LCD will hold the temperature
values. The first display indicates the current value. The second display indicates the calculated (Avg., MAX, MIN or
MAX-MIN).
2. Use the laser button to activate the laser for aiming at distant objects.
3. Use the backlight button to illuminate the display in low-light conditions.
4. Press the "MODE" button to change the second temperature display. This display can show AVG (average), MAX
(maximum), MIN (minimum), MAX-MIN (span) or Alarm (Only ATE-2532).
5. Press the °C/°F button to change the unit of measure.
6. (Only ATE-2532) Press "+" button to add the emissivity, and press "-" to reduce the emissivity.
(Please refer to the chapter 8 "Emissivity".)
7. (Only ATE-2533) Press "MODE" button, when "ALARM" symbol appears, you can set the alarming temperature
value. Press "+" to add the alarming temperature value, and press "-" to reduce it. (Please refer to the chapter 9
"Temperature alarming function".)
7. DISTANcE TO SPOT rATIO
The thermometer has an optical angle and spot size as shon below.
The target should be larger than the unit's optical spot size. The distance to spot ratio for this thermometer is 12:1
(12mm spot at 1meter) as shown below.
8. EMISSIvITy
Emissivity is a term used to describe the energy emitting characteristics of a material. The higher the emissivity
value a material has, the more infrared energy it will emit at a particular temperature. And the meter's emissivity is more
close to the material's emissivity, the more particular measurement result you can get. So, it is important to set a just
emissivity according to the material.
1. ATE-2530 and ATE-2533 have a fixed (non-adjustable) emissivity of 0.95. Most organic materials and oxidized
metal range in emissivity between 0.85 and 0.98.
2. ATE-2532 has an adjustable emissivity from 0.10 to 1.00. For different materials, you can set a different
emissivity. An object's emissivity is relative to its material, finish, color and temperature etc. The attached sheet is the
emissivity of different substances in the normal temperature.
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