ThermoWorks TW2 User Manual

TW2 Thermometer – Operating Instructions

The thermometer is a non-contact infrared thermometer. Simply aim the
thermometer at the target and press the SCAN button to display the surface
temperature.

Laser Information:
By partially pressing the SCAN button, the device will begin to measure the
temperature of the target. When the SCAN button is completely depressed,
the laser will operate.

SCAN button

MODE button

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.

°C OR °F MODE

To change the thermometer from ‘°C’ to ‘°F’ or from ‘°F’ to ‘°C’, firstly turn the
instrument on by pressing the SCAN button, then press the MODE button four
times, the ‘°C’ or ‘°F’ symbol will flash, press the SCAN button to change to
scale.

MINIMUM OR MAXIMUM MODE

To utilize the thermometer’s minimum or maximum mode, firstly turn the
instrument on by pressing the SCAN button, then press the MODE button once
for minimum or twice for maximum function. The ‘MIN’ or ‘MAX’ icon will flash,
then press the SCAN button to confirm the minimum or maximum mode. The
thermometer will display the minimum or maximum reading only.

LOCK MODE

The lock mode is particularly useful for continuous monitoring of
temperatures.

To utilize the thermometer’s LOCK mode, firstly turn the instrument on by
pressing the SCAN button, then press the MODE button three times for the lock
mode function. The lock icon will flash, then press the SCAN button to confirm
the lock mode. The thermometer will continuously display the temperature for
up to 60 minutes or until the SCAN button is pressed again.

EMISSIVITY RANGE

The infrared thermometer is supplied with a default emissivity of 0.95. The
emissivity of the thermometer can be changed from 0.05 (5E) to 1.00 (100E).
Changes should only be carried out by experienced personnel. To change
the emissivity, turn the instrument on by pressing the SCAN button, then
press the MODE button five times for emissivity function. ‘95E’ will flash on
the LCD screen, then press the SCAN button to adjust the emissivity value,
press the MODE button again to exit the set up screen. For information
relating to the emissivity of specific materials, please refer to our website at
www.thermoworks.com.

Note: Non-contact infrared thermometers are not recommended for use in
measuring the temperature of shiny or polished metals.

Usage In Cold Temperatures

Most infrared thermometers, like the TW2, use a lens to focus the infrared
energy on a sensor before converting to a displayed temperature. Temperature
errors can occur when changing ambient conditions abruptly without adequate
equilibration time. When taking low temperature readings in a walk-in cooler it
is recommended to allow at least 20 minutes for the lens to stabilize in the new
ambient temperature before readings are taken.

LCD ERROR MESSAGES

The thermometer incorporates visual diagnostic messages as follows:

‘Hi’ or ’Lo’ is displayed when the temperature being
measured is outside of the range of the instrument, ‘Hi’
when higher than +250°C (482°F) and ‘Lo’ when lower
than -55°C (-67°F).

‘Er2’ is displayed when the thermometer is exposed
to rapid changes in the ambient temperature. ‘Er3’
is displayed when the ambient temperature of the
thermometer EXCEEDS 0°C (32°F) OR +50°C (122°F).
In both cases you should allow plenty of time (minimum
20 minutes) for the thermometer 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 on. If the error message
remains please contact the Service Depar tment for
further assistance.

BATTERIES

The thermometer has two separate batteries. The battery closer to the side of
the laser beam output is for laser operation only. The other battery is designated
for temperature measurements. The thermometer can still measure temperature
properly without the laser battery.

The thermometer incorporates visual low battery indication for the temperature
measurement battery as follows:

‘Battery OK’:

measurements

are possible

‘Battery Low’: battery

needs to be replaced,

measurements

are possible

‘Battery Exhausted’:

measurements are

not possible

BATTERY REPLACEMENT

When the ‘Low Battery’ icon indicates the battery is low, the battery should be
replaced immediately with a CR2032 lithium cell. The battery is located under
the twist cover at the rear of the thermometer. Please note: It is important to
turn the instrument off before replacing the battery otherwise the thermometer
may malfunction.

Dispose of used battery properly and keep away from children.

STORAGE & 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 it, do not submerge any part of the thermometer. .

SPECIFICATIONS

Measurement Range -55 to +250°C (-67~482°F)
Operating Range 0~50°C (32~122°F)
Accuracy
(Tobj=15-

35°C,Tamb=25°C)
Accuracy (Tobj=-

33~250°C,Tamb=23±3°C)
Resolution (-9.9~199.9°C) 0.1°C / 0.1°F (switchable)
Response Time (90%) 1 second
Distance:Spot 6:1 optics ratio

Emissivity Range

Battery Life

Battery CR2032 (for Laser, 2pcs required)
Dimensions 22.5 x 50 x 103mm
Weight 65 grams including batteries

+/-1.0°C (1.8°F)

±2% of reading or 2°C (4°F) whichever is
greater

0.95 default adjustable 0.05 to 1.00
emissivity

Typ. 40hr, min 30hr
(auto power off after 15 seconds)

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.

GUARANTEE

The thermometer is guaranteed for a period of one year from the date of
purchase against mechanical and electrical manufacturing defects. There
are no user serviceable parts inside the instrument. Any attempted repair by
unauthorized persons voids the warranty.

1762 W. 20 S. #100

Lindon, UT 84042

ph: 801.756.7705

www.thermoworks.com