EXTECH IR270 Infrared Thermometer User Manual

InfraRed Thermometer
With Laser Pointer  and High/Low  Alarms
User Manual

IR270 Infrared Thermometer

Model IR270

Additional User Manual Translations available at www.extech.com

Introduction

Thank you for selecting the Extech IR270 IR Thermometer. The IR270 makes non‐contact  (infrared) surface temperature measurements and includes a laser pointer for convenient  argeting. The meter switches ON and starts scanning surface temperatures as soon as you pull  the trigger. This device is shipped fully tested and calibrated and, with proper use, will provide  years of reliable service. Please visit our website (www.extech.com)) to check for the latest version and translations of this User Manual and Customer Support.

Features

• Measures non‐contact surface temperature up to 650°C (1202°F)
• Automatic ranging
• 12:1 Distance to Spot Ratio (Field of View)
• Laser pointer targeting
• Automatic Data Hold when trigger is released
• High/Low temperature alarms
• Maximum, Minimum, Average, and Differential displays
• 20‐memory datalogger
• Selectable emissivity
• Display backlight
• Selectable temperature units (°F / °C)
• Battery status indication

Safety

International  Safety  Symbols
This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information
Warnings

• Do not directly or indirectly point the laser at the eyes of a person or an animal
• Inspect for damage or for any shortage of parts or accessories before use
• Replace the battery immediately after the battery indicator flashes
• Do not use the thermometer near explosive gases, steam, or dust
• Note  that  an  object  with  high  reflectivity  will  normally  cause  the  measured  temperature  value  to  read  much  lower  than  the  actual  temperature
• Use the device only as described in this User Manual  <1mW Output at 650nm

Cautions

• avoid thermometer damage, please avoid the following hazards:
• EMF from welding equipment or electro‐induction heaters
• Static electricity
• Thermal  shock  caused  by  large  or  abrupt  environmental  temperature  changes;  wait  30  minutes  to  allow the thermometer to stabilize to new environmental conditions
• Do not use this device in excessively high temperature environments

Description

Meter  Description

1. Backlit multifunction LCD
2. Laser/Backlight/Log button
3. Up arrow button
4. Secondary display mode button
5. Laser pointer lens
6. IR thermometer lens
7. Down arrow button
8. Trigger (pull and hold to scan surfaces)
9. Battery compartment (9V)

Display  Description

1. Measurement Scan mode. The icon flashes while the trigger is pulled. The displayed reading  represents the temperature of the scanned surface
2. Data hold mode. Reading is held after trigger is released
3. Primary display. Surface temperature reading
4. Datalogger mode
5. Secondary display mode icons (EMS, MAX, MIN, DIF,  AVG, HAL, LAL)
6. Secondary Display value
7. Battery status icon. Flashes when battery voltage is  critically low.
8. Temperature units (selectable)
9. Emissivity. Selectable from 0.10~1.00
10.  Laser pointer icon. Appears when laser is enabled

Operation

Meter  Power
One 9V battery powers the meter. Pull the meter trigger to switch the meter ON. If the meter  does not switch ON, please check the battery (located in the meter handle); refer to the  Maintenance section for more information. The battery icon provides battery status; replace the  battery as soon as the battery icon flashes. The meter switches OFF seven seconds after you  release the trigger (during the seven‐second period the last reading freezes on the display).
Surface Temperature Measurements

1.  Hold the meter by its handle and point it toward the surface under test.
2. Pull and hold the trigger to turn the meter ON and to scan surface temperatures. With the  trigger pulled the SCAN icon flashes in the upper left area of the display. Read the measured  temperature in the primary display area.
3. If ‘HI’ appears on the main LCD digits, the temperature reading exceeds the high range of the  meter.
4. Release the trigger; the reading will hold for approximately 7 seconds, and then the meter will  automatically shut off.
5. Refer to the Field of View section for distance to target (spot) ratio considerations.
6. The meter defaults to the programmed conditions in use when the meter was last switched  OFF. For example, if the laser is set to default to ON and the temperature units are set to  Fatthe time the unit is switched OFF, the unit will switch ON and use the same settings.

Laser  Pointer  and LCD  Backlight Default Modes

Press the M button or pull/release the trigger to turn the meter ON. Now, press and release the   button to step through these default conditions:

• Laser ON/Backlight OFF
• Laser ON/Backlight ON
• Laser OFF/Backlight OFF
• Laser OFF/Backlight ON

When you enable the laser, the laser icon appears on the aupper left. To use the laser, pull and  hold the trigger and aim the laser approximately one half inch above the point of test.
Selecting  the  Temperature Unit  of  Measure  (°C/°F)
With the meter ON, long press the M button to switch the temperature units. The display beeps  and switches between °C and °F.
Locating  Hot or  Cold Spots
To locate a hot or cold spot while scanning, aim the meter outside the area of interest then scan (in an up and down motion) until the spot is located.
Distance  to Spot Ratio (Field of  View)
The  meter’s  field  of  view  is  12:1  (distance  to  spot  ratio). For example, if the meter is 12 inches from the target (spot), the diameter of the target must be  at  least 1 inch. Refer to the  field  of view diagram printed on the meter and reproduced
here. Measure surfaces from a maximum distance of 2 feet whenever possible. The meter can measure  from further distances but external sources of light may interfere with the readings and the spot  size may be so large that it encompasses unintended surface areas.
It is necessary to ensure that the size of  the target is larger  than the spot size. The smaller the target, the closer the distance should be.

Measurement Considerations

1. The object under test should be larger than the spot (target) size (refer to the field of view  section above).
2. Remove frost, oil, grime, etc., from surface 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 but it can take up to 30  minutes for the meter to adjust to wide ambient temperature changes.
7. To find a hot spot, aim the meter outside the area of interest then scan (in an up and down  motion) until the hot spot is located.

Secondary  Display  Modes

The secondary display area is located on the bottom of the meter’s LCD. You can step through the secondary display modes by simply short pressing the MODE (M) button from a powered ON or  powered OFF condition.
The mode icon appears on the lower left and its associated value appears on the lower right  (except for emissivity; its value appears on the upper right). Use the  arrow buttons to make changes to a setting where applicable. Refer to the sections, below, for detailed information for  each mode.
For best results, pull and release the trigger to switch the meter ON, use the M button to select  the desired mode, and then pull the trigger to begin measuring with the desired mode now active.
Maximum  Reading  (MAX)
Use the M button to step to the MAX parameter, then pull and hold the trigger to start scanning  surface temperatures. The reading on the lower right represents the highest reading recorded during the current measurement scan. When pressing M from a powered OFF condition, the  value shown on the lower right is the highest reading recorded during the last measurement scan performed.
Minimum  Reading  (MIN)
Use the M button to step to the MIN parameter, then pull and hold the trigger to start scanning surface temperatures. The reading on the lower right represents the lowest reading recorded during the current measurement scan. When pressing M from a powered OFF condition, the  value shown on the lower right is the lowest reading recorded during the last measurement scan performed.
Differential  Reading (DIF =  MAX  minus  MIN)
Use the M button to step to the DIF parameter, then pull and hold the trigger to start scanning surface temperatures. The reading on the lower right represents the difference between the  MAX and the MIN readings recorded during the current measurement scan. When pressing M  from a powered OFF condition, the value shown on the lower right represents the difference between the MAX and the MIN readings recorded during the last measurement scan performed.
Average  Reading (AVG)
Use the M button to step to the AVG parameter, then pull and hold the trigger to start scanning  surface temperatures. The reading on the lower right represents the average of all readings  recorded during the current measurement scan. When pressing M from a powered OFF  condition, the value shown on the lower right is the average of all readings recorded during the last measurement scan performed.
High Alarm  Limit (HAL)
Use the M button to step to the HAL parameter. Use the arrow buttons to set the High Alarm  limit. While measuring, the meter beeps when the displayed reading is higher than the high  alarm setting. If the backlight is on, the backlight color will turn red in a high alarm condition.
Low Alarm  Limit (LAL)
Use the M button to step to the LAL parameter. Use the arrow buttons to set the Low Alarm  limit. While measuring, the meter beeps when the displayed reading is lower than the low alarm  setting. If the backlight is on, the backlight color will turn blue in a low alarm condition.
Datalog  Memory (LOG)
The meter has twenty memory locations (1~20) in which to stored temperature readings.

1. From a powered ON or OFF condition, short press the M button to step to the LOG mode  (the LOG display icon is much smaller than the other mode icons)

2. Use the  arrows to select a memory location in which to store a reading

3. Pull and hold the trigger to scan surface temperatures

4. Press the  button at any time to store the reading in the selected memory location.
   Note that you can press the button after the trigger is released in order to store the held reading into the selected memory location

5. Use the arrow buttons to step through and view the readings stored in each location.
   Dashes indicate that a memory location is empty

6. A reading will remain in a memory location until the user overwrites that memory location

Emissivity  Adjust (EMS)
Use the button to step  to  the EMS parameter. Use the arrow buttons to  set the desired emissivity value (shown on the upper right). The emissivity can be adjusted between 0.10~1.00.  Refer to the Emissivity Considerations section for more information.

Emissivity Considerations

Emissivity represents the reflectivity of a material. For this meter, the emissivity can be adjusted from  0.10~1.00  (see  Emissivity  Adjust  section above).  Most  organic  materials  and  painted  or zidized surfaces have an emissivity of approximately 0.95. If possible, masking tape or flat black paint should be applied to cover the measured surface.
Wait a period of time to allow the tape or paint to reach thermal equilibrium with the surface of the covered object. Measure the temperature of the surface covered with tape or paint only.
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

Maintenance

Cleaning
Use compressed air to clear dust and other particles from the meter lenses, and then carefully  clean with a moistened (clean water) cotton swab.
To clean the meter housing, wipe with a damp, soft cloth. Do not use solvents or abrasives. Do  not immerse the IR270 in water or in other liquids.

Troubleshooting

for service

Replacing  Batteries
When the battery icon flashes, or when the meter does not switch ON, replace the battery.
The battery compartment is located in the meter handle. The battery compartment cover is located just below the trigger. Pry the compartment cover loose (from the top of the  compartment) to open the compartment.
Replace the 9V battery following correct polarity and then close the battery compartment before using the meter.
**** Never dispose of used batteries or rechargeable batteries in household waste.
As consumers, users are legally required to take used batteries to appropriate collection sites, the retail store where the batteries were purchased, or wherever batteries are sold.
Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end‐of‐life devices to a designated collection point for the disposal of electrical and electronic  equipment.

Specifications

Infrared Thermometer  Specifications

Range / Resolution| Auto range -20 – 650°C (-4 – 1202°F) / Resolution 0.1°
---|---
Accuracy| -20 – -2°C (-4 – 28°F): ± 4°C (8°F) -2 – 94°C (28 – 200°F): ± 2.5°C (4.5°F) 94 – 204°C (200 – 400°F): ± (1.0%rdg + 1°C/2°F) 204 – 426°C (400 – 800°F): ± (1.5%rdg + 1°C/2°F) 426 – 650°C (800 – 1202°F): ± (3%rdg + 1°C/2°F) Note: Accuracy is specified for the following ambient temperature range: 23 — 25°C (73 — 77°F), <80%RH
Emissivity| 0.10 — 1.00 adjustable
Field of View| 12:1 (approx.) Distance to Spot ratio
Laser power| Class 2 < 1mW, 650nm ±10nm
IR Spectral response| 8 – 141.1m
Repeatability| ±0.5%rdg or ±1°C (1.8°F); whichever is greater

General  Specifications

Copyright ©  2017 FLIR Systems,  Inc.
All rights reserved including the right of reproduction in whole or in part in any form
www.extech.com
IR270‐en‐GB_V1.0   12/17

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