Southwire 31212S User manual

Operating Instructions
31212S Non-Contact Dual-Laser Infrared Thermometer
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31212S manual/manuel
Contents Made in China/Fabriqué en Chine
Product distributed by/Produit distribué par
Southwire Company, LLC.
One Southwire Drive, Carrollton, GA 30119
©2018 Southwire Company, LLC.
All rights reserved. Tous droits réservés.
03/18 Rev

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Introduction
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Radiation is the transmission of energy in the form of waves or
particles through space. One type of radiation is electromagnetic
radiation which includes visible light, radio waves, microwaves,
and infrared (IR). You cannot see IR radiation but you can feel it
as heat. It behaves like visible light - it can be focused, reflected
or absorbed.
An IR thermometer uses a lens to gather IR radiation and focus it
on a detector. The detector converts the IR radiation into
electricity which can then be displayed as a temperature
measurement.
The Southwire 31212S Infrared (IR) Thermometer measures
surface temperature from -26° to 932°F (-32° to 500°C). The IR
thermometer has a 12:1 Distance-to-Spot ratio which means that
when you aim the thermometer at a surface that is 12-inches
away, the thermometer gathers temperature information from a
measurement area (“spot” size) of 1 inch in diameter. If the IR
thermometer is moved further from the object surface, the
measurement area or spot size increases.
Safety
• Use caution when the laser beams are on.
• Do not aim the laser beams at anyone’s eye or allow the laser
beams to strike the eye from a reflective surface.
• Do not use the thermometer near explosive gases, vapors or
dust.
• To avoid burns, understand that reflective objects can be
much hotter than the thermometer indicates.
• Replace the battery as soon as the low battery warning
appears on the LCD display.
• Do not use the thermometer if it appears damaged or is
operating improperly.
• Before using the thermometer, inspect the case.
Protection may be impaired. When in doubt, have the
thermometer serviced.
• This product should not be used for medical evaluations.
• If the thermometer is used in a manner not specified by the
manufacturer, the protection provided by the thermometer may
be impaired.
• Laser used for aiming purposes only.
When you press the trigger, two laser beams indicate the size of
the measurement area. Imagine a circle inside of the two lasers
and that is the approximate size of the area the thermometer is
collecting date from.
WARNING A Warning identifies conditions and actions
that pose hazards to the user. To avoid electrical shock or
personal injury, follow these guidelines:

Maintenance
Major Components of the IR Thermometer
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This thermometer is designed to provide years of dependable
service if the following care instructions are performed:
• KEEP THE THERMOMETER DRY.
• USE AND STORE THE THERMOMETER IN NORMAL
TEMPERATURES. Temperature extremes can shorten the life
of electronic parts and distort or melt plastic parts.
• HANDLE THE THERMOMETER GENTLY AND CAREFULLY.
Dropping it can damage the electronic parts inside.
• KEEP THE THERMOMETER CLEAN. Wipe the housing
occasionally with a damp cloth. DO NOT use chemicals,
cleaning solvents, or detergents.
• USE ONLY FRESH BATTERIES OF THE RECOMMENDED
SIZE AND TYPE. Remove old or weak batteries so they do
not leak and damage the unit.
• IF THE THERMOMETER IS TO BE STORED FOR A LONG
PERIOD OF TIME, the batteries should be removed to prevent
battery leakage which would damage the thermometer.
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To avoid damaging the thermometer or the equipment under
test protect them from the following:
• EMP (electro-magnetic fields) from arc welders, induction
heaters, etc Static electricity.
• Thermal shock (caused by abrupt ambient temperature
changes).
• Do not leave the thermometer on or near objects of high
temperature.
Symbol Explanation
Risk of danger. Important information. See manual
Hazardous voltage. Risk of electrical shock
Warning. Laser
Conforms to requirements of European Union and European
Free Trade Association (EFTA)
Do not dispose of this product as unsorted municipal waste.
Battery

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Laser ON Symbol
Distance -To-Spot Ratio
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Data Hold
Major Components of the IR Thermometer
1. Infrared (IR) sensor
2. Laser pointers
3. Battery cover screw
4. Battery compartment cover
5. Trigger
6. Tripod mount
7. Lanyard attachment
8. LCD display
9. Function buttons
1. Emissivity Setting
2. Laser ON Indicator
3. High & Low Alarm Indicators
4. Temperature Units
5. Low Battery Indicator
6. 4-Digit Temperature Display
7. Infrared Scanning Indicator
8. Mode Settings
9. Lock Indicator
10. HOLD indicator
Words & Symbols Shown on the LCD Display
When you aim the IR thermometer at an object and press the
trigger, the temperature of that object is displayed on the LCD
screen. When you release the trigger, the HOLD indicator will
appear on the LCD display. The HOLD indicator means that the
IR thermometer is “holding” the last measured temperature and
displaying it on the LCD display. The temperature will remain on
the display until either a) the IR thermometer turns off or b) the
trigger is pressed again.
Whenever you press the trigger and the lasers are on, the
IR thermometer will display the laser symbol on the LCD
display.
The Distance-to-Spot ratio is one of the most important parame-
ters of an infrared thermometer. Generally, the larger the
distance-to-spot ratio, the more accurate the IR thermometer
will be. For example, the 31212S IR thermometer has a
distance-to-spot ratio of 12:1. If the IR thermometer is exactly
12 inches from a wall (“distance”), the area on the wall from
which the thermometer is gathering data (“spot”) is 1 inch in
diameter. If you move the IR thermometer 24 inches from the
wall, the size of the area being measured increases to 2 inches.
Keep this concept in mind as you use your thermometer.
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SET Button
Emissivity Setting
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IR Thermometer Operation
The SET buttons allows you to access the following parameters
Emissivity Setting
Fahrenheit or Celsius Setting
To change the emissivity setting of the IR thermometer, first use
the chart below to determine the emissivity number of the
material you are measuring.
Laser ON or OFF setting
High Temperature Alarm
Low Temperature Alarm
Lock Mode
Your 31212S IR Thermometer provides for several user
programmable settings which can be programmed using
the MODE and SET Buttons.
Each time the SET button is pressed, it will move to the next
function as shown on the diagram below. The SET button only
operates after the trigger is released. Each function is
described below.
Emissivity is a number which describes a materials ability to emit
thermal radiation. It is a number between 0.1 and 1. A number
like 0.1 represents a perfect reflector (like aluminum foil) whereas
the number 1 represents a perfect emitter (like black cloth). The
Southwire 31212S allows you to adjust the emissivity setting of
the thermometer to match the material being measured. Using
the correct emissivity setting will ensure that your temperature
measurements are as accurate as possible. For example, if
you’re monitoring the temperature of concrete as it cures, you
would set emissivity to 0.94 (see chart below) so your measure-
ment is as accurate as possible.
Lock
Exit
SET
Fahrenheit or Celsius
Laser On or off
High Temperature Alarm
Low Temperature Alarm
Emissivity

Substance
Asphalt
Concrete
cement
sand
Earth
Water
Ice
Snow
Glass
Ceramic
Marble
Plaster
Mortar
Brick
Cloth(black)
Human skin
Lather
Charcoal(powder)
Lacquer
Lacquer(matt)
Rubber(black)
Plastic
Timber
Paper
Chromium oxides
Copper oxides
Iron oxides
Textiles
Substance
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Press the SET button until the Emissivity indicator “ ε ” begins
flashing. Press the Up button to increase the value. Press the Down
button to decrease the value. To save the setting, press the SET
button until all words or symbols on the LCD screen stop flashing or
press the trigger to save the setting and exit the emissivity setting.
Fahrenheit or Celsius Setting – To change the units the temperature is
displayed in, press the SET button until °C or °F begins flashing.
Press the Up or Down button to change from °C to °F or vice versa.
To save the setting, press the SET button until all words or symbols
on the LCD screen stop flashing or press the trigger to save the
setting and exit.
Laser On or Off – The function of the lasers is to help identify where
the IR thermometer is gathering data but the lasers are not required
to scan and record temperatures. Therefore, the lasers may be
turned off. To turn the lasers off, press the SET button until “ “
begins flashing. Press the Up or Down button to turn the lasers ON
or OFF. To save the setting, press the SET button until all words or
symbols on the LCD screen stop flashing or press the trigger to
save the setting and exit.
High Temperature Alarm– The High Temperature Alarm allows you
to set a specific temperature at which a buzzer alarm will sound if
the thermometer measures a temperature above the setting. To set
the High Temperature Alarm press the SET button until the HIGH
alarm symbol begins flashing. Press the Up or Down arrow to
change the setting. To save the setting, press the SET button until
all words or symbols on the LCD screen stop flashing or press the
trigger to save the setting and exit.
Low Temperature Alarm – The Low Temperature Alarm allows you
to set a specific temperature at which a buzzer alarm will sound if
the thermometer measures a temperature below the setting. To set
the Low Temperature Alarm press the SET button until the LOW
alarm symbol begins flashing. Press the Up or Down arrow to
change the setting. To save the setting, press the SET button until
all words or symbols on the LCD screen stop flashing or press the
trigger to save the setting and exit.
Thermal emissivity Thermal emissivity
0.90 to 0.98
0.92 to 0.96
0.92 to 0.96
0.96 to 0.98
0.90 to 0.95
0.90 to 0.94
0.80 to 0.90
0.89 to 0.91
0.93 to 0.96
0.94
0.96
0.90
0.83
0.94
0.98
0.80 to 0.95
0.97
0.94
0.90
0.70 to 0.94
0.78
0.78 to 0.82
0.90
0.98
0.75 to 0.80
0.96
0.85 to 0.95
0.81
Emissivity Setting

MODE Button
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IR Thermometer Operation
1) MAX – displays the maximum temperature recorded between the time the
trigger is pulled and released.
2) MIN– displays the minimum temperature recorded between the time the
trigger is pulled and released.
3) AVG– displays the average temperature recorded between the time the
trigger is pulled and released.
4) DIF– indicates the difference between the maximum temperature recorded
and the minimum temperature recorded between the time the trigger is
pulled and released.
5) All MODES OFF (default setting).
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1. Hold the thermometer by the handle and point it towards the desired
surface to be measured.
To conserve batteries, the meter will turn off 15 seconds after the trigger is
released.
3. Release the trigger. When you release the trigger, the IR thermometer will
stop gathering temperature data but will continue to display the last
temperature the thermometer measured.
2. Press and hold the trigger to turn the IR thermometer on. The two red
laser dots indicate the diameter of the circular measurement area. Aim the
lasers at the surface you wish to measure. The LCD display will display the
temperature of the surface.
As long as you press and hold the trigger, the IR thermometer will continue
to gather temperature data and display it on the LCD screen. It may take a
few seconds to get a stable reading.
LOCK on/off– The 31212S IR thermometer can be mounted on a
tripod for continuous operation. The LOCK feature allows you to
“lock” the IR thermometer in the SCANNING mode and measure
temperature continuously.
Press the SET button until the lock symbol begins flashing. Press
the Up button or Down button to turn the LOCK on. Pull the trigger
and release. The meter will stay on continuously until the trigger is
pulled again.
The IR thermometer can operate in five different modes.
Each time the MODE button is pressed, the display will move to the next
MODE or none.
MAX
MIN
AVG
DIF
EXIT
MODE

1. For greater accuracy, ensure that the surface you wish to measure is larger than the
spot size measured by the meter. Reference the spot diagram above or printed on
the side of the meter.
2. If the surface is highly reflective, apply electrical tape or flat black paint to the surface
before attempting to take measurements. Allow time for the tape or paint to reach
the same temperature as the surface.
3. The meter cannot measure through transparent surfaces such as glass. It will
measure the surface temperature of the glass instead.
4. Steam, dust, smoke, etc., can interfere with IR thermometer measurements.
5. Make sure the surface being measured is clean and free of frost, dirt, oil, etc.
6. The meter automatically corrects for changes in ambient temperature. However,
it can take up to 30 minutes to adjust to wide variations.
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Specifications
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Battery Replacement
1. The LCD screen will display the low battery symbol when it’s
time to replace the batteries.
2. Note the two depressions on either side of the meter handle, near the trigger.
Turn the screw to unlock the battery cover and pull the battery cover open.
Remove and properly discard the old 9V battery.Replace with a new 9V and
close the battery compartment cover securely.
NOTE:
-32°C- 500°C (-26°F - 932°F)
-32°C≤ t ≤0°C 21°C - 25°C
69.8°F - 77°F
0°C＜ t ≤500°C
-26°F≤ t ≤32°F
32°F＜ t ≤932°F
±（1.8°C+0.1°C/°C）
±（3.6°F+0.1°F/°F）
±3.6°F or ±1.8% of reading,
whichever is greater
±1.8°C or ±1.8% of reading,
whichever is greater
±0.1°C/°C or ±0.1%/°C of reading, whichever is greater
（±0.1°F/°F or ±0.1%/°F of reading, whichever is greater）
RE:30MHz - 1GHz CLASS A Standard EN 61326-1:2013
RS:80MHz - 2.7GHz 3V/m CLASS A Standard EN 61326-1:2013
Refer EN61000-4-3:2006+A1:2008+A2:2010+EN 61326-2-3:2013
ESD: Contact-discharge 4kv; Air-discharge 8kv;
CLASS B Standard EN 61326-1:2013 Refer EN61000-4-2:2009
0°C - 50°C (32°F - 122°F)
＜90%RH （non-condensing）
12:1 (Applies for 90% for the measuring signal)
-20°C- 60.0°C (-4°F - 140°F)
Temperature
Accuracy
Emissivity
Spectral Response
Response Time
Display Resolution
Laser Power
Laser Wavelength
Laser Class level
Auto Power off time
Battery
EMC Standard
Certification
0.1~1.0（Adjustable）
CE; CA65
Accuracy
8um - 14um
≤250ms(95% of reading)
0.1°C（0.1°F）
＜1mW
630nm - 670nm
CLASS 2, Conform to EN 60825-1:2014
15s±1s(HOLD mode)
1*6F22 9V Zn-Mn battery
Surface
Temperature
Ambient
Temperature
Working Temperature
Storage Temperature
Temperature Coefficient
D:S Ratio
(Distance to Spot)
Measurement Range
Working Relative
Humidity

Customer Service
In the presence of a strong vertical electromagnetic field, 550MHz ~ 700MHz 3V/m applied
to the product will result in a 20% to 30% variation of the measured value. If this variation is
observed, move from the area and allow the meter to recover
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For technical questions related to your IR thermometer contact Southwire
Customer Service at 1-855-SW-TOOLS
Professional Thermometer Calibration
For information on Southwire’s meter calibration service, visit our website at
southwiretools.com. Once there, click on the Test and Measurement page.
Then find the product page for your IR thermometer. There you’ll find a link to
our Meter Calibration service.
Register Your Meter
Product Compliance
To register your thermometer with Southwire, visit our web site at southwire-
tools.com and click on Log In/Register to register. After registering, click on
Register Product to register your product.
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LIMITED WARRANTY AND LIMITATION OF LIABILITY ON
SOUTHWIREMETERS & TESTERS
Southwire Company, LLC. warrants this product to be free from defects in
material and workmanship for five years from the date of purchase. This
warranty does not coverfuses,disposable batteries, ordamage arising from
an accident, neglect, misapplication, contamination, modification, improper
maintenance or repair, operation outside of specifications, or abnormal
handling of the product.
Southwire’s sole liability, and the purchaser’s
exclusive remedy, for any breach of this warrantyis expressly limited to
Southwire’s repair or replacement of the product. Whether Southwire repairs
or replacesthe product will be a determination that Southwire makes at its
sole discretion.
SOUTHWIRE MAKES NO WARRANTY THAT THE PRODUCT WILL
BE MERCHANTABLE OR FIT FOR ANY PARTICULARPURPOSE.
SOUTHWIRE MAKES NO OTHER WARRANTY, EXPRESSED OR
IMPLIED, OTHERTHAN THE WARRANTY SPECIFICALLY SET FORTH
HEREIN.
SOUTHWIRE WILL NOT BE LIABLE FORANY INCIDENTAL,
CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE DAMAGESFOR
ANY BREACH OF THIS WARRANTY.
This warranty is void if this product is used for rental purposes. No product
resellerisauthorized to extend any other warranty on Southwire’s behalf
relating to this product, and no such reseller warranty will be binding on
Southwire. If you have a warranty claim, or if the product needs to be
serviced during or after the warranty period set forth above, please contact
the Customer Service Department at 855-SWTOOLS (855-798-6657).
The senderis responsible for all shipping, freight, insurance,and packaging
costsassociated with sending a product to Southwire. Southwire will not be
responsible forlost or damaged products returned pursuant to this warranty.
All products returned to Southwire under this warranty should be mailed to:
Southwire Company, LLC.
Attention: Tool Warranty Return
840 Old Bremen Road
Carrollton, GA 30117