Extech Instruments 42540 User Manual

User’s Manual

High Temperature InfraRed Thermometer

with Laser Pointer

MODEL 42540

Introduction

Congratulations on your purchase of the Model 42540 IR Thermometer. The 42540 is
capable of non-contact (infrared) temperature measurements at th e 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.

Model 42540 Version 1.3 January 2004

2

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and
workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables).
If it should become necessary to return the instrument for service during or beyond the warranty period,
contact the Customer Service Department at [phone] ext. 210 for authorization or visit our website at
www.extech.com (click on ‘Contact Extech’ and go to ‘Service Department’ to request an RA number). A
Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is
responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This
warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation
outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically
disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for
any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or
replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or
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

Range / Resolution -58 to 1400

o

F (-50 to 760oC) 0.1oC/F

Accuracy ±(2% + 2o) at <932oF (500oC)

± (2.5% + 5

o

) at > 932oF (500oC)

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. 12:1 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.
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 10.2 oz. / 290g
Dimensions 3.9 x 2.2 x 9.0” (100 x 56 x 230mm)