Extech Instruments 42570 User manual

User Manual

Dual Laser InfraRed (IR) Thermometer

MODEL 42570

42570 V1.2 8/09

Introduction

Congratulations on your purchase of the Model 42570 IR Thermometer. This Infrared

thermometer measures and displays non-contact temperature readings up to

3992°F/2200°C (certified to 2000°F/1100°C) and also Type K thermocouple readings to

1370°C (2498°F). At 50”, built-in dual lasers converge to 1” target spot to insure accurate

targeting and temperature measurement. Advanced features include a USB PC interface

and software, 100ms response time, Max/Min/Ave/Diff displays adjustable emissivity and

High/Low alarms. Proper use and care of this meter will provide years of reliable service.

Warranty

EXTECH INSTRUMENTS CORPORATION (A FLIR COMPANY) warrants this instrument to be free of defects

in parts and workmanship for three years 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 (781) 890-7440 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 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

42570 V1.2 8/09

Meter Description

1. IR sensor and Laser Pointers

2. LCD Display

3. Down Button

4. Measurement Trigger

5. Mode Button

6. Battery compartment

7. Backlight/Laser Button

8. Up Button

9. Type K thermocouple input (side)

10. USB port (side)

DISPLAY

1. SCAN, measurement in progress

2. Bargraph

3. Laser pointer active

4. Power locked ON

5. HOLD, last measurement locked in display

6. Max/Min temperature display or memory

location display

7. Main temperature display

8. High/ Low limit alarm

9. USB connection

10. Battery status

11. Emissivity or Type K or Stored value display

12. Thermocouple probe installed

13. Emissivity setting

14. Logged memory

910

42570 V1.2 8/09

Operating Instructions

IR Temperature Measurements

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

2. Pull and hold the trigger to turn the meter on and begin testing. “SCAN” and the

temperature reading will appear on the large display. The upper and lower sub-displays

will indicate values/settings previously used.

3. Release the Trigger and the reading will hold for approximately 7 seconds (“HOLD” will

appear on the LCD) after which the meter will automatically shut off. The only

exception to this is if the LOCK mode is set to ON.

The MODE button options

With the trigger pulled (SCAN displayed), Press the MODE button to view and scroll

through:

MAX : Maximum value measured

MIN: Minimum value measured

DIF: Difference between the Max and Min values

AVG: Average of the measured values

LOG: A memory location is displayed in the small upper display and the value in that

location is displayed in the small lower display. Press the ▲or ▼buttons to

scroll through the locations.

TK: With a Type K thermocouple probe connected to the meter, the probe

temperature is displayed in the small lower display.

With the trigger released (HOLD displayed), Press the MODE button to scroll through and

access the following. The selected item is indicated by a blinking icon.

Recorded data: (Press the ▲or ▼button to scroll through and view)

MAX

MIN

DIF

AVG

LOG

ε= Emissivity (blinking ε=). Press the ▲or ▼button to set the value.

Lock mode. Press the ▲or ▼buttons to select ON or OFF.

High alarm ON or OFF (blinking H). Press the ▲or ▼button to select.

High alarm value adjustment (blinking H and ). Press the ▲or ▼button to

set the value.

Low alarm ON or OFF (blinking L). Press the ▲or ▼button to select.

Low alarm value adjustment (blinking L and ). Press the ▲or ▼button to

set the value.

°C or °F Temperature units. Press the ▲or ▼button to select.

42570 V1.2 8/09

Dual Laser Pointer and Backlight Button

The dual laser pointers are designed to cross at a distance of 50” (76cm). The spot size at

this distance is a 1” diameter and this is the recommended distance to target for most

measurements. To turn the lasers on/off:

1. Press and Hold the Trigger

2. While SCAN is on the display, press and release the backlight/laser button ( ).

Either the backlight or laser pointers will change status (On/Off). Repeat this until the

desired conditions are set. The laser icon will appear in the LCD when the laser

function is enabled.

3. The status of the functions will be stored in memory and will remain as the default

“turn-on” condition until changed.

High and Low Alarm Feature

When either programmed alarm (high or low) point is reached the meter will alert the user

via an audible beep and a blinking LCD display icon. The alarm limit is set and the feature

is enabled/disabled using the MODE button. The setting is stored and memory and will

remain as the “turn-on” condition until changed.

Temperature Units

The temperature units can be set to °F or °C. The selection is made using the MODE

button.

Lock feature

The LOCK feature disables the Auto Power Off feature for the period of use when

selected. The feature is useful for long term temperature monitoring and hands free use.

The meter will revert to auto power off if the trigger is pressed during a locked scan. The

selection is made using the MODE button.

Over-range Indication

If the temperature measurement exceeds the specified temperature range, the

thermometer will display dashes in place of a temperature reading.

USB Function

The supplied software and cable are used to transmitt the IR and Type K measurement

data to a PC via USB.

To Turn-on or Shut-off the USB function:

1. With MAX, MIN, DIF, or AVG displayed, press the LIGHT/LASER button until “USB”

sign appears in the right lower corner of the LCD. USB is active.

2. Press the LIGHT/LASER button again until “USB” disappears. The USB function is

off.

Refer to the help file in the software for operational details.

42570 V1.2 8/09

Battery Replacement

When the low battery symbol appears on the display, replace

the meter’s battery (9V). The battery compartment is located

behind the panel that surrounds the meter’s trigger. Open the

compartment by pressing the release button (1) and then pulling

the panel (2) down from the trigger area. Replace the 9V battery

and close the battery compartment cover.

Data Logger

Storing Data: The thermometer is capable of storing up to 100

data points.

Infrared: To store data from an infrared reading,

1. Pull and Hold the trigger

2. Press the MODE button until LOG appears in the lower left corner of the display; a

log location number will be displayed. If no temperature has been recorded in the

displayed LOG location, 4 dashes will appear in the lower right corner.

3. Aim the unit at the target area you want to record, and press the laser/backlight

button. The recorded temperature will appear in the lower right corner.

4. To select another log location, press the up and down keys.

Recalling Data: To recall stored data after the unit shuts off,

1. Press the MODE button until LOG appears in the lower left corner. A LOG location

number will be shown below LOG, and the stored temperature for that location will

be display.

2. To move to another LOG location, press the UP and Down keys.

Log Clear Function: To clear the memory,

The “Log clear” function allows you to quickly clear all logged data points. This function

can only be used when the unit is in the LOG mode.

1. While in LOG mode, press the trigger, and then press the “down” arrow button until

LOG location “0” is displayed. Note: This can only be done when the trigger is

pulled. LOG location “0”cannot be accessed, by using the “up” arrow button.

2. When LOG location “0” shows in the display, press and release the laser/backlight

button, then press and release the up arrow key. A tone will sound, and the LOG

location will automatically change to “1”, signifying that all data locations have been

cleared.

42570 V1.2 8/09

IR Measurement Notes

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

of view diagram (printed on the side of the meter and in this guide).

2. Before measuring, be sure to clean surfaces that are covered with frost, oil, grime, etc.

3. If an object's surface is highly reflective, apply masking tape or flat black paint to the

surface before measuring. Allow time for the paint or tape to adjust to the temperature

of the surface it is covering.

4. Measurements through transparent surfaces such as glass will not be accurate.

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

6. The meter automatically compensates for deviations in ambient temperature. However,

it can take up to 30 minutes for the meter to adjust to extremely wide changes.

7. To find a hot spot, aim the meter outside the area of interest then scan across (in an up

and down or side to side motion) until the hot spot is located.

Field of View

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

(spot), the diameter of the target must be greater than 1 inch. Other distances are shown in

the field of view diagram. Measurements should normally be made as close as possible to

the 1” spot distance. The meter can measure from longer 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.

@50”

1”

@25”

0.5”

@100”

2”

@150cm

2.5cm

@300cm

5cm

@75cm

1.25cm

42570 V1.2 8/09

Specifications

InfraRed Thermometer

Range -58 to 3992oF (-50 to 2200oC)(typical spec only >1832oF/1000oC)

Resolution 0.1o< 1000 o,1o≥1000 o

Accuracy -58°F to -10°F(-50°C to -23°C) ±14°F/7°C (Typical)

-10°F to 28°F(-23°C to -2°C) ±8°F/4°C

28°F to 200°F (-2°C to 94°C) ±4.5°F/2.5°C

200°F to 400°F (94°C to 204°C) ±(1.0%rdg + 2°F/1°C)

400°F to 800°F (204°C to 426°C) ±(1.5%rdg + 2°F/1°C)

800°F to 1832°F (426°C to 1000°C) ±(3%rdg +2°F/1°C)

1832 to 3992°F (1000°C to 2200°C) ±(5%rdg +4°F/2°C)(typical only)

Note: Accuracy is specified for the following ambient temperature range:

73 to 77°F (23 to 25°C)

Emissivity 0.10 to 1.00 adjustable

Field of View D/S = Approx. 50:1 ratio (D = distance; S = spot or target)

Laser pointer Dual, Class 2 laser < 1mW power; Wavelength is 630 to 670nm

IR Spectral

response

8 to 14 μm (wavelength)

Repeatability ± 0.5% of reading or ± 1.8oF (1oC) whichever is greater

Thermocouple Thermometer (Type K)

Range -50 to 1370°C(-58°F to 2498°F)

Resolution 0.1 °C(0.1°F)<1000, 1°C(1°F)>1000

Accuracy -50 to 1000°C (-58 to 1832°F): ± 1.5% of reading + 3°C (±5°F)

1000 to 1370°C (1832°F to 2498°F): ± 1.5% of reading + 2°C (±3.6°F)

General Specifications

Display Backlit LCD display with function indicators

Response time 100ms

Over range indication “---------“

Operating Temperature 32oF to 122oF (0oC to 50oC)

Operating Humidity 10% to 90%RH operating, <80%RH storage.

Storage Temperature 14 to 140oF (-10 to 60oC)

Power Supply 9V battery

Automatic Power Off 7 seconds, with LOCK to disable

Weight 11.3 oz. / 320g

Dimensions 8 x 6.1 x 2” (204 x 155 x 52mm)

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.

42570 V1.2 8/09



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

Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451

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