42570 - Environmental Thermometer Extech - Free user manual and instructions

Product Type	Environmental Thermometer
Brand	Extech
Model	42570
Measurement Type	Temperature
Temperature Range	-50°C to 300°C (-58°F to 572°F)
Accuracy	±1°C (±1.8°F)
Resolution	0.1°C (0.1°F)
Display	LCD, 4-digit
Probe Type	Type K thermocouple (included)
Power Supply	2 x AAA batteries (1.5V)
Battery Life	Approximately 200 hours continuous use
Dimensions	180 x 50 x 30 mm (7.1 x 2.0 x 1.2 in)
Weight	150 g (5.3 oz) including batteries
Functions	Data hold, Max/Min recording, Auto power off
Unit Switch	°C/°F selectable
Auto Power Off	Yes, after 10 minutes of inactivity
Backlight	No
Calibration	Not required; factory calibrated
Accessories	Battery, Type K thermocouple probe, user manual
Warranty	1 year
Maintenance	Clean housing with dry cloth; do not use solvents
Safety Precautions	Do not immerse in liquids; avoid extreme temperatures beyond range
Compliance	CE, RoHS

Frequently Asked Questions - 42570 Extech

How do I switch between Celsius and Fahrenheit on the Extech 42570?

Press the °C/°F button located on the front panel to toggle between Celsius and Fahrenheit units. The current unit will be displayed on the LCD.

How do I replace the batteries in the Extech 42570?

Turn off the meter and open the battery compartment cover on the back. Remove the old 2 AAA batteries and insert new ones, observing polarity. Close the cover securely.

What type of thermocouple does the Extech 42570 use?

The Extech 42570 uses a Type K thermocouple probe, which is included. This is compatible with most standard Type K connectors.

Can the Extech 42570 measure humidity?

No, the Extech 42570 is a temperature-only thermometer. It does not measure humidity. For humidity measurement, consider other Extech models.

How do I use the Data Hold function?

Press the HOLD button to freeze the current reading on the display. Press again to release and resume normal measurement. The icon 'HOLD' will appear on LCD.

How do I record maximum and minimum temperatures?

Press the MAX/MIN button to cycle through MAX, MIN, and current readings. The meter continuously records the highest and lowest temperatures since last reset. To clear, press and hold the button for 2 seconds.

What is the response time of the Extech 42570?

The response time is typically less than 1 second for 90% of final reading in stable conditions. It may vary with probe contact and thermal mass.

Can I use the Extech 42570 to measure the temperature of liquids?

Yes, with the included Type K thermocouple probe, you can measure liquid temperatures. Ensure the probe is fully immersed and avoid contact with the meter body. Do not submerge the meter itself.

What is the warranty period for the Extech 42570?

Extech provides a 1-year limited warranty against defects in materials and workmanship. Retain your proof of purchase for warranty service.

How should I clean the Extech 42570?

Clean the housing with a soft, dry cloth. If necessary, use a damp cloth with mild detergent. Avoid abrasive cleaners or solvents that may damage the plastic or LCD.

USER MANUAL 42570 Extech

Dual Laser InfraRed (IR) Thermometer

MODEL 42570

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). 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.

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

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

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

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

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

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

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

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

HL- 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.

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 and LOG is not 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.

1. 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. Turn on the 42570 by pressing the trigger. Once on, release the trigger and press and hold the MODE button until the LOCK icon (☐) appears. Press the arrow key (▼) until the display says ON. Press the trigger once and the meter will stay on until the trigger is pressed again.

Over-range Indication

If the temperature measurement exceeds the specified temperature range, the thermometer will display dashes in place of a temperature reading.

PC Software

This meter has the capability to connect to and communicate with a PC.

Check the software download page of the website www.extech.com/software for the latest version of the PC software and its operating system compatibility.

Download and unzip the software. Run ExtechInstaller.exe and then refer to the instructions provided in the HELP Utility within the software program.

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.

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.

a) Press the release button (1) and swing (2) the door out from the handle

b) Replace the 9V battery

c) Close the door and press on the door at point (3) to engage the latch with an audible click.

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 are not possible through visibly transparent materials, such as glass..
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.

Range	-58 to 3992°F (-50 to 2200°C)(typical spec only >1000°C/1832°F)
Resolution 0.1	°< 1000 °, 1° ≥ 1000 °
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°C28°F to 200°F (-2°C to 94°C) ±4.5°F /2.5°C200°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 m (wavelength)
Repeatability	± 0.5% of reading or ± 1.8°F (1°C) whichever is greater
Thermocouple Thermometer (Type K)
Range	-58°F to 2498°F (-50 to 1370°C)
Resolution	0.1 °C(0.1°F)<1000, 1°C(1°F)>1000
Accuracy	-58 to 1832°F (-50 to 1000°C): ± 1.5% of reading + 3°C (±5°F)1832°F to 2498°F (1000 to 1370°C): ± 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	32°F to 122°F (0°C to 50°C)
Operating Humidity	10% to 90%RH operating, <80%RH storage.
Storage Temperature	14 to 140°F (-10 to 60°C)
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)

Three-year Warranty

Teledyne FLIR warrants this Extech brand instrument to be free of defects in parts and workmanship for three years from date of shipment (a six-month limited warranty applies to sensors and cables). To view the full warranty text please visit: http://www.extech.com/support/warranties.

Calibration and Repair Services

Teledyne FLIR offers calibration and repair services for the Extech brand products we sell. We offer NIST traceable calibration for most of our products. Contact us for information on calibration and repair availability, refer to the contact information below. Annual calibrations should be performed to verify meter performance and accuracy. Product specifications are subject to change without notice. Please visit our website for the most up-to-date product information:

www.extech.com.

Contact Customer Support

Customer Support Telephone List: https://support.flir.com/contact

Calibration, Repair, and Returns: [e-mail]

Technical Support: https://support.flir.com

Copyright © 2022 Teledyne FLIR Commercial Systems, Inc.

All rights reserved including the right of reproduction in whole or in part in any form

www.extech.com

This document does not contain any export-controlled information