UNI-T UT300A+ Mini Infrared Thermometer User Manual
- June 6, 2024
- UNI-T
Table of Contents
UNI-T UT300A+ Mini Infrared Thermometer
Introduction
UT300A+ infrared thermometer (hereinafter referred to as the thermometer) can quickly and accurately determine the surface temperature by measuring the infrared energy radiated from the target surface. It is suitable for non- contact surface temperature measurement.
Safety Information
Warning: To avoid eyes or personal injury, please read the following safety instructions before using the thenmometer:
- Please do not irradiate people or animals with laser directly or indirectly.
- Please do not look at the laser directly or through other optical tools (telescope, microscope, etc).
- If battery symbol on LCD display is flashing, replace batteries immediately to avoid inaccurate measurements before using the thermometer.
- Inspect the case before using the thermometer.
- Do not use the thennometer if it appears damaged. Look for creeks or missing plastic. Please refer to the emissivity information for the actual temperature. Reflective objects can cause the actual temperature value to be higher than the measured temperature value. When measuring these objects, please be aware not to touch high temperature surfaces.
- Do not use the thermometer in an explosive gas, steam, or humid environment.
- To ensure measurement accuracy, place the thennometer in the current environment for more than 30 minutes before using it.
- Avoid keeping the thermometer near high temperature objects for a long time.
Safety Standards
CE Certification: EN61326-1 :2013 EN61326-2-3:2013
Laser safety standard: EN60825-1 :2014
Reference Standard: JJG 856-2015
SPECIFICATION
| Temperature range | -20’C–400’C (-4’F-752’F) |
|---|---|
| Accuracy | >0’C: ±2.0’C or ±2% of reading, whichever is greater |
| Ambient temperature | ,;;o•c: ±(2.0’C+0.1’C/’C) |
| 21’C-25’C | >32’F: ±4.0’F or ±2% of reading, whichever is greater |
| (70’F-77’F) | ,;;32’F: ±(4.0’F+0.1’F/’F) |
Temperature coefficient
| ±0.1’C/’C or±0.1%/’C, whichever is greater (±0.1’F/’F or±0.1%/’F, whichever
is greater)
D:S ratio| 10:1 (calculated at 90% energy)
Emissivity| 0.95
Response time| <500ms (95% of reading)
Spectral response| 5.5um-14um
Resolution| 0.1’C(0.1’F)
Repeatability| 1’C or 1.0%, whichever is greater (2’F or 1.0%, whichever is
greater)
Laser
| Single laser, wavelength 630nm-670nm Output powar < 1mW, class 2 laser
Battery type| AAA”2I1.5V
Battery life| ;;,20H (continuous operation when laser backlight is turned on)
Product size| 135mm94mm36mm
Product weight| About 148g (including batteries)
Operating temperature| o·c-5o•c (32°F-122°FJ
Storage temperature| -20’C-60’C (-4’F-140’F)
Operating humidity| <RH90% (non-condensing)
Drop test| 1m
Product Features
- Simple one button operation
- Single laser targeting
- LCD backlight
- Auto data hold (8s)
- Auto power off
- Low battery indication
- ‘C/’F selectable
- Power-off memory
- Product Descriptions
- External Structure
LCD Display Function
Operations
Viewing the Last Measured Value
In the off state, short press the trigger to turn on the thermometer, ii will
display the last measurement data that was held before the last shutdown.
Temperature Measurement
Aim the thermometer at the target, then pull and hold the trigger, the laser
indicator on the LCD display shows that the laser is turned on and points to
the target, the measured temperature value will be displayed on the LCD, and
the maximum or minimum temperature of the target area can be measured by
scanning up, down, left and right according to the laser spot indication.
Note: The measurement distance must be determined by the size of the
measured target according to the “distance to spot size ratio (D:S)” and
“field of view”.
Hold
After the trigger is released, the last measured value and the HOLD icon will
remain on the LCD display. If there is no operation for 8 seconds, the
thermometer will automatically shut down and save the last measured
value.
Unit Conversion
In the power-on state, open the battery cover and short press the ‘C/’F button
to switch the temperature untt to Celsius (‘C) or Fahrenheit (‘F).
Distance to Spot Size Ratio (D:S)
As the distance (D) from the target being measured increases, the spot size
(S) on the measured area becomes larger. The relationship between the distance
and the spot diameter is as shown in the figure below. The spot diameter
represents 90% of the energy in the circle. The maximum D:S (10:1) will be
obtained when the thermometer is 400mm (16″) from the target resulting in a
spot diameter of 40mm (1.6″).
FIELD OF VIEW:
Make sure that the measured target is larger than the spot diameter. The
smaller the target is, the closer the test distance should be (please refer to
D:S for the spot diameter at different distances). To obtain the best
measurement result, it is recommended that the target being measured is 2.5
times larger than the spot diameter.
Troubleshooting
Symptom| Problem| T Aciloo|
---|---|---|---
I Stop measuring|
Olappears when measuring| Measured value ls greater than the maximum range|
| Measured value| |
-Olappears when measuring| Stop measuring|
is less than the
minimum range
|
| Place the thermometer In a o•c-so•c (32•F-
12. 2 F) environment,
and It can be recovered after30minutes
|
| Exceeding the|
| miniTlumor|
Err appears| maximum|
when booting| operating ambient
temperab.Jra
|
Battery
indicator flashes
| Low battery| Replace the batteries|
Laser fails to
work/weak laser
| Low battery| Replace the batteries|
ss1 ry,
!’1i = :ment I := ::: :i
misma ing,
| ****
Please refer to the instructions for field ofview,D:S,etc.
|
target diameter is less
than 20mm, etc.
|
MAINTENANCE
CLEAN: Blow away particles with clean compressed air, carefully wipe the
surface of the lens with a ,,. cotton swab moistened with water, and clean the
chassis with a damp sponge or soft cloth. Battery Replacement Please install
or replace the batteries(AAA (LR03) 2*1.5V) as shown on the right.
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