Extech Instruments 42500 Bedienungsanleitung

USERGUIDE

Mini InfraRed Thermometer

with Laser Pointer

MODEL 42500

42500-EU-EN v2.0 10/13

Introduction

Congratulations on your purchase of the Model 42500 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. This device is shipped fully tested and calibrated and, with proper use, will

provide years of reliable service. Please visit our website (www.extech.com) to check for the latest

version of this User Guide, Product Updates, and Customer Support.

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

Meter Description

1. LCD Display

2. Function Buttons

3. Handle Grip

4. IR Sensor

5. Laser pointer beam

6. Measurement Trigger

7. Battery Compartment

42500-EU-EN v2.0 10/13

Operating Instructions

1. Hold the meter by its Handle Grip and point it toward the surface to be measured. Read the

Field of View section below for distance to target ratio information.

2. Pull and hold the Trigger to turn the meter on and begin testing. The display will light if the

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

3. While continuing to pull the Trigger:

a. Push the Laser button to switch the laser pointer ON. When the laser is on, the laser

icon will appear on the LCD over the temperature reading. Aim the red beam

approximately a half inch below the point of test (pressing the Laser button again turns the

laser off).

b. Select the temperature units using the oC/ oFbutton.

c. Push the backlight button to switch ON the LCD backlighting function.

4. Release the Trigger; the reading will hold for approximately 6 seconds, after which the meter will

automatically shut off.

5. The meter defaults to the programmed conditions in use when the meter was last switched off.

For example, if the laser is set to ON and the temperature units are set to oF at the time the unit

is switched OFF, the unit will switch ON and use the same settings.

Over-range Indicator

If the temperature measurement exceeds 500°F (260°C), the thermometer will display dashes in

place of a temperature reading.

Field of View

The meter’s field of view is 6:1. For example, if the meter is 12 inches from the target (spot), the

diameter of the target must be at least 2 inches. Other distances are shown below in the field of

view diagram.

Note that measurements should normally be made closer than 2 feet 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.

1”

2”

Distance to Ob

ect

Diameter of Spot

Sensor Beam

4”

3”

6”

12”

24”

0.5”

Laser Beam

0.63”

42500-EU-EN v2.0 10/13

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. 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 (EU Battery ordinance) to return all used

batteries, 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

42500-EU-EN v2.0 10/13

Specifications

Infrared Thermometer Specifications

Range / Resolution -4 to 500oF (-20 to 260oC) 1oF/C

Accuracy ± 2% of reading or ±4oF (2oC) whichever is greater, from 60 to

113oF (15 to 50oC)

± 3% of reading or ±6oF (3oC) whichever is greater, for remainder

of range: -4 to 500oF( -20 to 260oC)

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 m (wavelength)

General Specifications

Display 1999 count, backlit LCD display with function indicators

Display rate 1 second approx.

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 6 seconds

Weight 4.9 oz. (140g)

Dimensions 6.7 x 1.7 x 1.6” (170 x 44 x 40mm)

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