UNI-T UT305R Infrared Thermometer User Manual
- June 6, 2024
- UNI-T
Table of Contents
UT305R
Infrared Thermometer
User Manual
Dear Users
Thank you for purchasing the new infrared thermometer. In order to use this
product safely and correctly, please read this manual thoroughly, especially
the Precautions part.
After reading this manual, it is recommended to keep the manual at an easily
accessible place, preferably close to the device, for future reference.
Limited Warranty and Liability
Uni-Trend guarantees that the product is free from any defect in material and
workmanship within one year from the purchase date. This warranty does not
apply to damage caused by accident, negligence, misuse, modification,
contamination, or improper handling. The dealer shall not be entitled to give
any other warranty on behalf of Uni-Trend. If you need warranty service within
the warranty period, please contact your seller directly.
Uni-Trend will not be responsible for any special, indirect, incidental, or
subsequent damage or loss caused by using this device.
Introduction
The UT305R 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 temperature measurement.
Precautions
- To ensure proper use of the thermometer, please read this manual carefully before use.
- To ensure safety and accuracy of the thermometer, it should only be repaired by a qualified professional using original replacement parts.
- If the battery symbol on the LCD flashes, please replace the battery immediately to prevent inaccurate measurement.
- Inspect the case before using the thermometer. Do not use the thermometer if it appears damaged. Look for cracks or missing plastic.
- Avoid keeping the thermometer near high-temperature environments for long periods.
- To ensure measurement accuracy, please use the thermometer in the operating environment [15°C~30°C, <85% RH (non-condensing)].
- Please use the thermometer indoors.
- The ambient temperature of the measured object must be stable, and it should not be measured in places with large airflow such as fans and air outlets.
- When changing to a new environment, please leave the thermometer for 30 minutes before use.
- When the measured object comes from a place with a large temperature dif ference from the measurement environment, keep it in the measurement environment for 10 to 30 minutes before measuring.
- Do not use the thermometer in places with strong sunlight or electromagnetic interference.
- After measuring extremely high or low-temperature objects, please leave the thermometer for 10 minutes before next use.
- It is recommended to measure three times at a time, whichever is the most displayed set of data.
- Make the sensor window directly face the measured object during measurement, otherwise it will cause the measured temperature to be different from the actual temperature.
Specifications
| Model | UT305R |
|---|---|
| Measuring range | 32°C~42.9°C (89.6°F~109.2°F) |
| LCD size | 30mm*30mm |
| LCD display | TN LCD |
| Accuracy | ±0.3°C (±0.6°F) |
| Optimal measuring distance | 5cm~10cm |
| Repeatability | 0.3°C (0.6°F) |
| Response time | ≤250ms (95% of reading) |
| Spectral response | 8μm~14μm |
| Auto power off | 15s |
| Low battery indication | |
| High temperature LED alarm | >37.2°C: orange light alarm (≤37.2°C: green light) |
| High-temperature audible alarm | >37.2°C: audible alarm |
| Data hold | |
| Unit conversion (°C/°F) | |
| Operating environment | 15°C~30°C (59°F~86°F), <85% RH |
| Transportation/Storage environment | -20°C~60°C (-4°F~140°F), <85% RH |
| Battery type | 9V battery (6F22) |
| Battery life | Continuous temperature measurement: ≥9 hours for |
the alkaline battery; ≥4 hours for the carbon battery
Accessories| Battery, user manual
Product Features
Bright, easy-to-read, and high-contrast display
With two-color (orange and green) LED and buzzer alarm functions
With tripod mounting hole (¼ inch)
External Structure
| 1 | Infrared sensor window |
|---|---|
| 2 | Trigger |
| 3 | Battery cover |
| 4 | Tripod mounting hole |
| 5 | LCD display |
| 6 | Buttons |
LCD Description
| Buzzer indicator| 
---|---|---
HI OK LO| Temperature measurement alarm indicator
| Low battery indicator
SCAN| Temperature measurement indicator
HOLD| Temperature hold indicator
C F| Temperature unit indicator
8888| Display of the measured temperature
Operating Instructions
Power On
In the off state, short press the trigger to turn on the thermometer.
Power Off
In the HOLD mode, if there is no operation for 15s, the thermometer will
automatically power off.
Manual Measurement
- Pull and hold the trigger after aiming at the measured object. The SCAN icon will be flashing indicating that the target temperature is being measured. The measurement result will be updated on the LCD.
- Release the trigger, the SCAN icon disappears, and the HOLD icon appears, indicating that the measurement has been stopped and the last measured value is held.
- When the measured temperature exceeds 37.2°C, the HI icon is displayed and the orange light gives an alarm.
Temperature Unit Setting
In the HOLD interface, short press the SET button to enter the temperature
unit setting interface, and switch between °C and °F by pressing the button or
button.
Audible Alarm Setting
In the HOLD interface, short press the SET button twice to enter the audible
alarm setting interface, and turn on/off the audible alarm by pressing the
button or button.
Maintenance
General Maintenance
As the thermometer is reusable apparatus, please pay attention to cleaning and
maintenance before use. If it is not in use for a long time, please keep its
lens clean and dust-free.
1. Clean the case: Wipe dirt with a clean soft cloth or cotton swab dipped in
medical alcohol or water.
2. Clean the lens: Use clean compressed air to blow off loose particles.
Carefully wipe the surface with a cotton swab dipped in medical alcohol or
water.
Battery Replacement
If the thermometer is not in use for a long time, please remove the battery to prevent battery leakage. Dispose of used batteries properly in accordance with local regulations.
To replace the battery:
1. Open the battery cover.
2. Replace with a 9V battery (6F22), noting the polarity.
3. Close the battery cover.
Troubleshooting
| Symptom | Cause | Action |
|---|---|---|
| HI appears | Measured value is greater | |
| than the maximum range | Stop measuring | |
| LO appears | Measured value is less | |
| than the minimum range | Stop measuring | |
| Err appears at booting | Exceeding the minimum or | |
| maximum operating temperature | Place the thermometer in a |
0°C~50°C (32°F~122°F)
environment for 30 minutes
Battery symbol flashes| Low battery| Replace the battery
UNI-TREND TECHNOLOGY 9CHINA0 CO., LTD.
No. 6, Gong Ye Bei 1st Road,
Songshan Lake National High-Tech Industrial
Development Zone, Dongguan City,
Guangdong Province, China
Made in China
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