Extech Instruments 42545 Manuale utente

User’s Manual

High Temperature InfraRed Thermometer

with Laser Pointer

MODEL 42545

Introduction

Congratulations on your purchase of the Model 42545 IR Thermometer. The 42545 is

capable of 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.

42545

Model 42545 Version 1.1 12/ 04

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 1832oF (-50 to 1000oC) 0.1oC/F to 200°, 1° over 200

-58 to -4°F ±9°F

-4 to 1000°F ±(2% rdg ± 4oF)

1001 to 1832°F ±(3% rdg ± 9oF)

-50 to -20°C ±5°C

-20 to 538°C ±(2% rdg ± 2oC)

539 to 1000°C ±(3% rdg ± 5oC)

Accuracy

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. 50:1 ratio (D = distance, S = spot)

Laser power Less than 1mW

Spectral response 6 to 14 µm (wavelength)

Over range indication LCD will display “1”

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

Model 42545 Version 1.1 12/ 04

Meter Description

1. Laser pointer beam

2. IR Sensor

3. Measurement Trigger

4. Battery Compartment

5. LCD Display

6. Push-buttons

7. Handle Grip

Model 42545 Version 1.1 12/ 04

Operating Instructions

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

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

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

3. While continuing to pull the Trigger:

a. Push the laser button to turn on the laser pointer. When the laser is on, the

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

beam at the point of test (pressing the laser button again turns the laser off).

b. Select the temperature units using the oCor oFbutton.

c. Push the backlight button to turn on the LCD backlight function.

4. Release the Trigger (the reading will hold for approximately 6 seconds) and the meter

will automatically shut off.

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.

Model 42545 Version 1.1 12/ 04

Field of View

The meter’s field of view is 50:1. For example, if the meter is 12 inches from the target

(spot), the diameter of the target must be at least .24 inches. Other distance ratios are

shown in the field of view diagram.

The target should always be larger than the spot size. The smaller the target the closer you

should be to take measurements. In instances were accuracy is critical make sure your

target is at least twice the spot size.

Note that measurements should normally be made less than 3 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.

0.72”

1” 2”

25” 36”

50”

Distance to Object

Diameter of Spot

0.5”

100”

Model 42545 Version 1.1 12/ 04

Battery Replacement

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

The battery compartment is located behind the panel that surrounds the meter’s trigger.

The panel can be pulled open by the two indentations near the trigger and folded down as

shown in the diagram.

Model 42545 Version 1.1 12/ 04



Support line (781) 890-7440

Technical support: Extension 200; E-mail: [email protected]m

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

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

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 to 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

(781) 890-7440 ext. 210 for authorization or visit our website www.extech.com for contact

information. 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.

Calibration and Repair Services

Extech offers repair and calibration services for the products we sell. Extech also

provides NIST certification for most products. Call the Customer Service Department for

information on calibration services available for this product. Extech recommends that

annual calibrations be performed to verify meter performance and accuracy.

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