Dwyer Instruments IR2 Operating Manual

Series IR2 Infrared Non-Contact Thermometer

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12:1 Distance-to-Target Size, Laser Sighting

Bulletin T-10-IR2

The Series IR2 Infrared Temperature Thermometer allows users to

economically take accurate measurements in hard to reach areas.
Measurements can be taken at a safe distance with a 12:1 Distance to
Target Ratio. The IR2 easily takes measurements within 2% accuracy
using a built-in laser sighting. The fixed emissivity of 0.95 is perfect for
measuring surface temperatures of concrete, asphalt, rubber, or
oxidized metals. Besides reading the process temperature, the back lit
display will also read the maximum temperature captured during scan.

SPECIFICATIONS
Measurement Range: -76 to 932°F (-60 to 500°C).
Accuracy: 2% of reading or 4°F (2°C) whichever is greater.
Emissivity: 0.95 fixed.
Distance to Target: 12:1.
Resolution: 0.1°F/0.1°C.
Response Time: 1 sec.
Operating Range: 32 to 122°F (0 to 50°C).
Average Battery Life: 180 hours of continuous use, (2) AAA batteries

included.

Weight: 3.61 oz (179 g).
Dimensions: 6.90 x 1.54 x 2.83 in (175.2 x 39.0 x 71.9 mm).

OPERATING INSTRUCTIONS

Simply aim thermometer at the target and press the “MEAS” key to
display the surface temperature.

°C or °F: Press the “MODE” key to switch between °F and °C.
Backlight: LCD Backlight always on.
Laser: Class II Laser: always enable while measuring.

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: [phone] e-mail: [e-mail]

page 2

Error Messages

The thermometer incorporates visual diagnostics messages as follows.

“Er2”: Displays when the thermometer is exposed to rapid changes in
the ambient temperature.
“Er3”: Displays when the ambient temperature exceeds 32°F (0°C) or
122°F (50°C). The thermometer should be allowed plenty of time
(minimum 30 minutes) to stabilize to the working/room temperature.

For all other error messages it is necessary to reset the thermometer. To
reset it, turn the instrument off, remove the battery and wait for a
minimum of one minute, reinsert the battery and turn it on. If the error
message remains please contact the Dwyer Customer Service
department for further assistance.

Batteries:

The thermometer incorporates visual low battery indication as follows.

Battery OK: Measurements are possible.

Battery Low: Battery needs to be replaced, measurements are still

possible.

Battery Exhausted: Measurements are not possible. When the low
battery icon indicates the battery is low, the batteries should be replaced
immediately with AAA, 1.5V batteries.

Please Note: It is important to turn the thermometer off before replacing
the battery otherwise the thermometer may malfunction. Dispose of
used battery promptly and keep away from children.

CAUTION

1. When device is in use, do not look directly into the
laser beam - Permanent eye damage may result.

2. Use extreme caution when operating the laser.

3. Never point the device towards anyone’s eyes.

4. Keep out of reach of all children.

EMC/RFI

Readings may be affected if the unit is operated within radio frequency
electromagnetic field strength of approximately 3 volts per meter, but the
performance of the instrument will not be permanently affected. ** Note:
under the electromagnetic field of 3V/m from 350 to 550 MHz, the
maximum error is 14.4°F (8°C).

MAINTENANCE

A periodic check of the system calibration is recommended. The Series
IR2 is not field serviceable and should be returned if repair is needed
(field repair should not be attempted and may void warranty). Be sure to
include a brief description of the problem plus any relevant application
notes. Contact customer service to receive a return goods authorization
number before shipping.

Storage and Cleaning

The sensor lens is the most delicate part of the thermometer. The lens
should be kept clean at all times, care should be taken when cleaning the
lens using only a soft cloth or cotton swab with water or medical alcohol.
Allowing the lens to fully dry before using the thermometer. Do not
submerge any part of the thermometer. The thermometer should be
stored at room temperature between -4 and 149ºF (-20 to 65ºC).

©Copyright 2014 Dwyer Instruments, Inc. Printed in U.S.A. 5/14 FR # R7-443519-00 Rev.2

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: [phone] e-mail: [e-mail]