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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.