La Crosse Technology InfraScan IR 101TWC User manual

IR 101TWC
InfraScan
Infrared Thermometer
Instruction Manual

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TABLE OF CONTENTS
Page
General
Quick instructions 3
Equipment Supplied 3
Description of Measuring Principle 3
Operation
Display and Operator Controls 4
Making a Measurement 4
Minimum and Maximum Temperature
Indication
5
Changing the Temperature Units 5
Back Light 5
Measurement Inaccuracies 5-6
Trouble Shooting 6
Maintenance
Changing the Batteries 7
Cleaning 7
Fastening the Infrared Thermometer 7
Technical Information 8-9
Warranty Information 10
General

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1. Quick Instructions
Press and hold the operating button for more than 1.5 seconds. The
temperature of the surface the lens is aimed at will read on the top of the
display. The minimum and maximum temperatures of the current
measurement are shown on the bottom of the display. When the operating
button is released “Hold” will be displayed between “min” and “max”
indicating the measurement is completed. After 4 seconds the backlight
will turn off. The unit will switch off after 8 seconds. Press and hold the
operating button again to begin a new measurement. To switch between °F
and °C simply “double click” the operating button.
2. Equipment Supplied
a. Infrared Thermometer base unit
b. 4 button cell batteries (already in unit)
c. Neck strap
d. Soft sided case
3. Description of measuring principle
When making a temperature measurement, the surface radiation of the
object to be measured is evaluated using the principle of radiation
thermometry. This is a purely passive process, i.e. no radiation is
transmitted, but instead, use is only made of the natural electromagnetic
radiation energy (heat radiation) that every body above a temperature of
absolute zero (-273 °C) has. The temperature can be determined very
accurately from this radiation energy if the emission factor of the object
being measured is known.
Operation

1. Display and operator controls
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All of the functions of the measuring unit are controlled and monitored using
the operating button (7) and the back lit display.
a. Temperature display - currently measured value 7
b. Hold indicator 1
c. Temperature display - minimum value 6
d. Temperature display - maximum value 5
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e. Battery symbol – low battery indicator
f. Temperature units – °F or °C 4
3
g. Operating Button
h. Lens
2. Making a measurement
The object being measured should be a minimum of twice the size of the
infrared thermometer’s lens. The ideal measuring distance is 3 to 12 inches,
which will yield a measurement area of ½ inch to 2 inches. As the infrared
thermometer is moved away from the object being measured the area being
measured increases (6:1 ratio).
The infrared thermometer is switched on by holding the operating button down
for 1.5 seconds or more. By continuously holding down the operating button
the measured value will be updated as long as the operating button is pressed.
Releasing the operating button will finish the measurement. The “Hold”
indication signals that measuring has stopped. The backlight will shut off 4
seconds after the operating button is released. The infrared thermometer will
automatically switch off 8 seconds after the last measurement. Holding down
the operating button again will clear the minimum and maximum memory and
begin a new measurement.
3. Minimum and maximum temperature indication

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The minimum and maximum value memories are cleared at the start of a
measurement by pressing the operating button. The temperature will be
measured and the minimum and maximum temperatures will be determined for
as long as the button is pressed. The minimum temperature is shown in the
lower left-hand part of the display and the maximum temperature can be seen in
the lower right hand part. These values each apply to the current measuring
cycle and are cleared as soon as the button is pressed again.
4. Changing the temperature units ( °F/°C )
The units for the temperature display can be switched between degrees Celsius
(°C) and degrees Fahrenheit (°F) by pressing the button briefly twice (double
click).
5. Back light
The LCD back light is constantly switched ON while the operating button is
pressed. When the operating button is released, the backlight will be ON for
approximately 4 seconds before automatically switching off 8 seconds after the
last measurement.
6. Measurement inaccuracies
The following points should be observed in order to avoid measurement errors:
a. It must be ensured that the object to be measured completely fills the
Infrared Thermometer monitoring area. Errors can occur when
measuring small objects, as the unit also monitors the temperature of
the surroundings as well as the object to be measured.
b. The principle of measurement requires the ambient temperature to be
determined. This takes place at one-minute intervals or each time the
unit is switched on. Changes in the ambient temperature, which can
occur when the user holds the unit in their hand, are not monitored
within this time period and therefore neither of them is taken into
account when determining the indicated temperature. A gradual
warming of the unit (the lens) between ambient temperature
measurements can, for example, lead to the indicated temperature
slowly falling.
c. If the emission factor for the object does not correspond to the preset
value of 0.95, the temperature will not be calculated correctly. Most
surfaces have an emission factor in the range of 0.8 to 0.98. In general,
the darker and more matte the surface is, the larger their emissions
factor. If the factor is greater the 0.95, the temperature indicated will

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be greater than the actual temperature of the object being measured. If
the factor is less then 0.9, the temperature indicated will be less than
the surface temperature. Polished metals have a very low emission
factor and are therefore not suitable for measuring with an infrared
thermometer. On the other hand, affixing adhesive tape to or painting
the surface will increase the emission factor and reduce the inaccuracy
of the measurement.
d. It is not possible to take measurements through transparent materials
(glass, plexiglas, etc.).
e. It is not possible to measure air temperatures.
f. Measurement errors can occur due to air contaminated with dust,
steam, smoke, etc.
7. TROUBLESHOOTING
Problem: Display shows -.-
Solution: The operating button has not been pressed for long enough. This must be
pressed for at least the duration of one measurement, i.e. for at least 1.5
seconds.
Problem: Display shows Err 1
Solution: The ambient temperature is outside the permitted range
Problem: Display shows 1
Solution: The measured value is outside the permitted range.
Problem: Battery symbol illuminates
Solution: The batteries are dead.
NOTE: For problems not solved, please contact La Crosse Technology.

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Maintenance
1. Changing the batteries
If the battery symbol appears in the display, the batteries must be changed. The
four button cells are accessible after opening the battery compartment at the rear
of the unit. The used batteries must be removed from the battery holders and
replaced by new button cells of the same type. Only LR44 type batteries may be
used. Care must be taken to ensure that the polarity is correct when inserting.
The plus terminal of all four batteries should point upwards. The batteries must
be checked to see that they are properly seated before closing the battery
compartment.
2. Cleaning
Clean the unit using only a dry cloth. If the unit is very dirty, the cloth may be
slightly dampened. Do not use cleaners containing solvents. Make sure that no
moisture enters the interior of the unit. When cleaning the lens, loose particles
must be removed using compressed air. Any remaining dirt can then be
removed with a soft brush or with a cotton swab moistened with water.
CAUTION Do not use cleaners containing solvents.
Fastening the Infrared Thermometer
A soft-sided pouch with a belt loop and a quick release neck strap are included with
the infrared thermometer. To attach the infrared thermometer to the neck strap
simply insert the clip of the neck strap into the buckle end of the thermometer until it
clicks. To release, press both sides of the clip on the neck strap and pull the buckle
end until it is free.

Technical Information
1. Accuracy: The larger of the two values given is applicable in each case.
2. Distance to measuring spot size: The parameter D : S characterizes the size
of the measuring spot in proportion to the distance between the object to be
measured and the Infrared Thermometer. For example, with a ratio of 6 : 1
and a distance of 12 inches, the monitoring area will have a diameter of 2
inches.
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Range :-5°F to 575°F
Resolution : 0.1 °F
D
S
Accuracy : ±1°F
Unit : °F or °C
Distance to measuring spot size D:S : 6:1
Ambient temperature range : 32°F to 104°F
Emission factor : 0.95
Power supply : 4 x LR44
button cell
batteries
Battery life (approx.) : 2000 measurements
(depending on the
usage)
Dimensions (L”xW”xH”) : 2.25” x 1” x 4”
3. Emissions factor: The physical quantity known as the emission factor
describes to what extent the infrared heat radiation that is emitted from an
object is determined by its own temperature. Accordingly, a value of 1 tells
us that the infrared heat radiation from the object is based only on its own

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temperature. A value of less than 1 means that the radiation emitted from
the object is not only determined by its own temperature but also by
reflections from neighboring bodies or due to the transmission, i.e. the
diathermancy, of the object. The emission factor thus has an effect on the
result of the measurement. The Infrared Thermometer works with an
emission factor of 0.95, i.e. the measuring unit assumes that the object
being monitored has a factor of 0.95. If this is not the case, there will be
inaccuracies in the measurement (see Section 2.6 “Measurement
Inaccuracies”).
All rights reserved. This handbook must not be reproduced in any form, even
in excerpts, or duplicated or processed using electronic, mechanical or chemical
procedures without written permission of the publisher.
This handbook may contain mistakes and printing errors. The information in
this handbook is regularly checked and corrections made in the next issue. We
accept no liability for technical mistakes or printing errors, or their
consequences.
All trademarks and patents are acknowledged.

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WARRANTY INFORMATION
La Crosse Technology provides a 1-year warranty on this infrared thermometer.
Contact La Crosse Technology immediately upon discovery of any defects covered
by this warranty.
Before sending the infrared thermometer in for repairs, contact La Crosse
Technology. The infrared thermometer will be repaired or replaced with the same or
similar model.
This warranty does not cover any defects resulting from improper use, unauthorized
repairs or faulty batteries.
LA CROSSE TECHNOLOGY WILL NOT ASSUME LIABILITY FOR
INCIDENTAL, CONSEQUENTIAL, PUNITIVE, OR OTHER SIMILAR
DAMAGES ASSOCIATED WITH THE OPERATION OR MALFUNCTION OF
THIS INFRARED THERMOMETER. THIS PRODUCT IS NOT TO BE USED
FOR MEDICAL PURPOSES OR FOR PUBLIC INFORMATION. THIS
PRODUCT IS NOT A TOY. KEEP OUT OF CHILDRENS’ REACH.
This warranty gives you specific legal rights. You may also have other rights
specific to your State. Some States do no allow the exclusion of consequential or
incidental damages therefore the above exclusion of limitation may not apply to you.
For warranty work, technical support, or information contact
La Crosse Technology
1116 South Oak Street
La Crescent, MN 55947
Phone: [phone]
Fax: [phone]
e-mail: [e-mail]
(warranty work)
[email protected]
(information on other products)
web:
www.lacrossetechnology.com