Extech Instruments 42510A User manual

User’s Manual
Wide Range Mini InfraRed
Thermometer
with Laser Pointer
MODEL 42510A
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Introduction
Congratulations on your purchase of the Model 42510A IR Thermometer. This Infrared thermometer
measures and displays non-contact temperature readings up to 650oC (1200oF). The adjustable
emissivity feature allows the IR thermometer to measure the temperature of virtually any surface.
The built-in laser pointer increases target accuracy while the backlit LCD and handy push buttons
combine for convenient, ergonomic operation. Operational functions include adjustable emissivity,
high-low alarms, MIN-MAX memory, and trigger-lock test mode. This instrument is fully tested and
calibrated prior to delivery, 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
Description
1. IR Sensor and Laser pointer
2. LCD Display
3. Function Buttons
4. Measurement Trigger
5. Battery compartment
1
2
3
4
5
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Function buttons
(Laser) and ▲(UP) arrow button
(Backlight) and ▼(DOWN) arrow button
MODE button
Display Description
1. SCAN, measurement in progress
2. HOLD, last measurement locked in display
3. Laser pointer active
4. Power locked ON
5. High limit alarm
6. Low limit alarm
7. C or F temperature units
8. Main temperature display
9. Low battery icon
10. MAX or MIN icon
11. Emissivity setting
12. Emissivity icon
13. MAX or MIN temperature display
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Operating Instructions
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. The temperature reading will
change as the user scans various targets.
3. The ‘SCAN’ icon remains on until the user releases the trigger.
4. When the trigger is released, the reading will hold for approximately 7 seconds (HOLD will
replace SCAN 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.
Laser Pointer
The Laser pointer optimizes the user’s aim during scanning. To turn the Laser on/off:
1. Press and release the Trigger
2. While HOLD is on the display, press the laser button once to turn the Laser on or off.
3. The laser icon will appear in the LCD when the Laser is on.
4. The status of the Laser is remembered by the meter and will remain as the ON condition until
changed.
Backlight
1. Press and release the trigger
2. While HOLD is on the display, press the backlight button once to turn the backlight on or off.
3. The backlight will illuminate the LCD when the feature is enabled.
4. The status of the backlight will be stored in memory and will remain as the ON condition until
changed.
5. Note: The backlight will shorten the battery life; use sparingly and only as necessary.
Over-range Indication
If the temperature measurement exceeds the specified temperature range, the thermometer will
display dashes in place of a temperature reading.
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The MODE button options
The MODE button is used to access the emissivity adjustment, unit of measure selection, MAX-MIN
feature, test-lock feature, and high-low alarms
1. Press and release the trigger
2. While HOLD is on the display, press the MODE button to enter the programming mode and to
step through and configure the following features. A blinking icon indicates the feature is
selected.
E= (Emissivity Value)
Press the ▲or ▼buttons to change the emissivity value from 0.10 to 1.00
C/F (Units of Measure)
Use the ▲and ▼buttons to select the unit of measure.
MAX-MIN (highest and lowest reading memory)
Press the ▲or ▼buttons to select MIN or MAX display
(Lock mode On/Off)
Press the ▲or ▼buttons to turn the lock feature ON or OFF.
(High Alarm On/Off)
Press the ▲or ▼buttons to turn the High Alarm feature ON or OFF.
(High Alarm setting)
Press the ▲or ▼buttons to set the high alarm limit value in the main display
(Low Alarm On/Off)
Press the ▲or ▼buttons to turn the High Alarm feature ON or OFF.
(Low Alarm setting)
Press the ▲or ▼buttons to set the Low alarm limit value in the main display.
Emissivity adjustment
An adjustable emissivity allows for accurate measurements on a variety of surface colors, textures,
reflectivity, and finishes. The topic of emissivity is covered in greater detail in a subsequent section
of this guide.
Temperature Units
The temperature units can be set to °F or °C in the programming mode using the ▲and ▼buttons
MAX (maximum) and MIN (minimum) Temperature display
The highest reading (MAX) or the lowest reading (MIN) encountered during a single measurement
scan is displayed in the lower left-hand display area on the LCD. Select MIN or MAX in the
programming mode using the ▲and ▼buttons
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.
High and Low Alarm Feature
The meter has a programmable high and low alarm feature. When either alarm 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 in the programming mode. The setting is stored and memory
and will remain as the ON condition until changed.
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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 may 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 12:1. For example, if the meter is 24 inches from the target (spot), the
diameter of the target must greater than 2 inches. Other distances are shown in the field of view
diagram. Measurements should normally be made as close as possible to the device under test.
The meter can measure from moderate 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”
@12”
2”
@24”
4”
@48”
2.54cm
@30.5cm 5cm
@61cm 10cm
@122cm
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Emissivity and IR Measurement Theory
IR Thermometers measure the surface temperature of an object. The thermometer’s optics sense
emitted, reflected, and transmitted energy. The thermometer’s electronics translate the information
into a temperature reading which is then displayed on the LCD.
The amount of IR energy emitted by an object is proportional to an object's temperature and its
ability to emit energy. This ability is known as emissivity and is based upon the material of the object
and its surface finish. Emissivity values range from 0.1 for a very reflective object to 1.00 for a flat
black finish. For the Model 42510A, the emissivity is adjustable from 0.1 to 1.00. Most organic
materials and painted or oxidized surfaces have an emissivity factor of 0.95. When in doubt, set the
emissivity to 0.95.
Emissivity Factors for Common Materials
Material under test Emissivity Material under test Emissivity
Asphalt 0.90 to 0.98 Cloth (black) 0.98
Concrete 0.94 Skin (human) 0.98
Cement 0.96 Leather 0.75 to 0.80
Sand 0.90 Charcoal (powder) 0.96
Soil 0.92 to 0.96 Lacquer 0.80 to 0.95
Water 0.92 to 0.96 Lacquer (matt) 0.97
Ice 0.96 to 0.98 Rubber (black) 0.94
Snow 0.83 Plastic 0.85 to 0.95
Glass 0.90 to 0.95 Timber 0.90
Ceramic 0.90 to 0.94 Paper 0.70 to 0.94
Marble 0.94 Chromium Oxides 0.81
Plaster 0.80 to 0.90 Copper Oxides 0.78
Mortar 0.89 to 0.91 Iron Oxides 0.78 to 0.82
Brick 0.93 to 0.96 Textiles 0.90
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 pulling the panel down from the
trigger area. Replace the 9V battery and close 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
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Specifications
Range / Resolution 0.1° resolution from -50.0 to 650.0°C (-58.0 to 999.9°F);
1° resolution from 1000°F to 1200°F
Accuracy -50°C to -35°C (-58°F to -31°F) ±4°C/9°F
-35°C to -2°C (-31°F to 28°F) ±3°C/5°F
-2°C to 94°C (28°F to 200°F) ±2.5°C/3°F
94°C to 204°C (200°F to 400°F) ±(1.0%rdg + 1°C/2°F)
204°C to 426°C (400°F to 800°F) ±(1.5%rdg + 1°C/2°F)
426°C to 650°C (800°F to 1200°F) ±(2.0%rdg +1°C/2°F)
Note: Accuracy is specified for the following ambient temperature range:
18 to 28°C (64 to 82°F)
Emissivity 0.10 to 1.00 adjustable
Field of View D/S = Approx. 12:1 ratio (D = distance; S = spot or target)
Laser pointer Class 2 laser < 1mW power; Wavelength: 630 to 670nm
IR Spectral response 8 to 14 m
Repeatability ± 0.5% of reading or ± 1oC/1.8oF; whichever is greater
General Specifications
Display Backlit LCD display with function indicators
Response time 300ms
Over range indication “---------“
Operating Temperature 0oC to 50oC (32oF to 122oF)
Operating Humidity 10% to 90%RH operating, <80%RH storage.
Storage Temperature -10 to 60oC (14 to 140oF)
Power Supply 9V battery
Automatic Power Off 7 seconds, with LOCK to disable
Weight 6.4 oz. / 180g
Dimensions 82 x 42 x 160mm (3.2 x 1.6 x 6.3”)
Copyright ©2013 FLIR Systems, Inc.
All rights reserved including the right of reproduction in whole or in part in any form
ISO-9001 Certified
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