Extech Instruments 42529 User manual

User’s Manual

InfraRed Thermometer

with Laser Pointer

MODEL 42529

Introduction

Congratulations on your purchase of the Model 42529 IR Thermometer. This thermometer

makes non-contact (infrared) temperature measurements at the touch of a button. The

built-in laser pointer increases target accuracy while the backlit LCD and handy push-

buttons combine for convenient, ergonomic operation. Proper use and care of this meter

will provide years of reliable service.

Model 42529-EU V2.0 5/09

Safety

Use extreme caution when the laser pointer beam is on

Do not point the beam toward anyone's eye or allow the

beam to strike the eye from a reflective surface

Do not use the laser near explosive gases or in other

potentially explosive areas

Specifications

Infrared Thermometer Specifications

Range / Resolution -20 to 320oC (0 to 600oF) 1oC/F

Accuracy ± 2% of reading or ± 2oC (4oF) whichever is greater.

Note: Accuracy is specified for the following ambient

temperature range: 18 to 28°C (64 to 82°F)

Emissivity 0.95 fixed value

Field of View D/S = Approx. 6:1 ratio (D = distance, S = spot)

Laser power Less than 1mW

Spectral response 6 to 14 m (wavelength)

General Specifications

Display 3½ digit backlit LCD display with function indicators

Display rate 1 second approx.

Over range indication Audible tone sounds and ‘OVER’ appears on the LCD when

the measurement exceeds the measurement range spec.

Operating Temperature 0°C to 50°C (32°F to 122°F)

Operating Humidity Max. 80% RH.

Power Supply 9V battery

Automatic Power Off Meter shuts off automatically after 7 seconds

Weight 180g / 6.35 oz.

Size 211 x 89 x 38mm (8.3 x 3.5 x 1.5”)

Meter Description

1. LCD Display

2. Function Buttons

3. Handle Grip

4. Laser Pointer

5. IR Sensor

6. Measurement Trigger

7. Battery Compartment

Model 42529-EU V2.0 5/09

Operating Instructions

1. Hold the meter by its Handle Grip and point it toward the device whose temperature is

to be measured.

2. Press and hold the red Trigger to turn the meter on and begin testing. The display will

light if the battery is charged. Replace the battery if the display does not light.

3. While continuing to press the Trigger, push the red Laser button to turn on the laser

pointer. Aim the red beam approximately a half inch higher than the point of test as

shown in the diagram below (pressing the Laser button again turns the laser off).

4. While measuring, the SCAN display icon will appear on the LCD above the

temperature measurement and to the left of the emissivity value (fixed at 0.95.).

5. If the measurement exceeds the useable temperature range (0 to 600oF), the meter will

emit a tone and the LCD will display ‘OVER’.

6. Release the Trigger when the temperature stabilizes. The HOLD display icon will

appear on the LCD indicating that the reading is being held.

7. Set the temperature units (oC or oF) using the blue oCand oFbuttons.

8. Press the yellow Backlight key to turn on the LCD backlighting function.

9. The meter will automatically power down after 7 seconds.

Field of View

The meter’s field of view is 6:1. For example, if the meter is 30.4cm from the target (spot),

the diameter of the target must be at least 5.08cm. Other distances are shown below in the

field of view diagram.

Note that measurements should normally be made less than 60.9cm from the target. The

meter can measure from further 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.

Model 42529-EU V2.0 5/09

Measurement Notes

1. The object under test should be larger than the spot (target) size calculated by the field

of view diagram (see diagram on previous page or on side of the meter).

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 before

measuring.

4. The meter cannot measure through transparent surfaces such as glass.

5. Steam, dust, smoke, etc. can obscure accurate measurements.

6. The meter compensates for deviations in ambient temperature. It can, however, take

up to 30 minutes for the meter to adjust to extremely wide ambient temperature

changes.

7. 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.

Battery Replacement

When the low battery symbol appears on the LCD, replace the meter’s 9V battery.

The battery compartment is located on the bottom of the meter's handle. Open the

compartment by sliding the battery compartment cover off in the direction of the arrow.

Replace battery and re-install the battery compartment cover.

You, as the end user, are legally bound (Battery ordinance) to return all used

batteries and accumulators; disposal in the household garbage is prohibited!

You can hand over your used batteries / accumulators at collection points in your

community or wherever batteries / accumulators are sold!

Disposal: Follow the valid legal stipulations in respect of the disposal of the

device at the end of its lifecycle

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