Extech Extech 42529 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 push­buttons combine for convenient, ergonomic operation. Proper use and care of this meter
will provide years of reliable service.

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX [phone] - TestEquipmentDepot.com

oral, is expressed or implied.

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

o

Range / Resolution 0 to 600
Accuracy ± 2% of reading or ± 4oF (2oC) whichever is greater.

Note: Accuracy is specified for the following ambient

temperature range: 64 to 82°F (18 to 28°C)
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 µm (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 32°F to 122°F (0°C to 50°C)
Operating Humidity Max. 80% RH.
Power Supply 9V battery
Automatic Power Off Meter shuts off automatically after 7 seconds
Weight 6.35 oz. / 180g
Size 8.3 x 3.5 x 1.5” (211 x 89 x 38mm)

F (-20 to 320oC) 1oC/F

Model 42529 Version 1.9 November 2005 2

Meter Description

1. LCD Display

2. Function Buttons

3. Handle Grip

4. Laser Pointer

5. IR Sensor

6. Measurement Trigger

7. Battery Compartment

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2

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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 600
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 (

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

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

o

C or oF) using the blue oC and oF buttons.

o

F), the meter will

Field of View

The meter’s field of view is 6:1, meaning that if the meter is 6 inches from the target, the
diameter of the object under test must be at least 1 inch. Other distances are shown below
in the field of view diagram. Refer to the chart printed on the meter for more information.

0.5”

Distance to Object

3”

1”

Diameter of Spot

6”

2”

12”

24”

Laser Beam

0.63”

Sensor Beam

4”

Model 42529 Version 1.9 November 2005 3

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5

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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.

Calibration and Repair Services



Support line [phone]

Technical support: Extension 200; E-mail: [e-mail]

Repair & Returns: Extension 210; E-mail: [e-mail]

Product specifications subject to change without notice

For the latest version of this User’s Guide, Software updates, and other

up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451

Model 42529 Version 1.9 November 2005 4

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX [phone] - TestEquipmentDepot.com