UT334A
Radiation Dose Tester
User Manual 
Preface
Thank you for purchasing the new UT334A radiation dose tester. In order to use this product safely and correctly, please read this manual thoroughly, especially the Safety Instructions part.
After reading this manual, it is recommended to keep the manual in 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 damages caused by accident, negligence, misuse, modification, contamination, and 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.
This warranty is the only compensation you can obtain. Uni-Trend will not be responsible for any special, indirect, incidental, or subsequent damage or loss caused by any reason or speculation. As some areas or countries do not allow limitations on implied warranties and incidental or subsequent damage, the above limitation of liability and stipulation may not apply to you.
Overview
UT334A is a compact radiation dose tester used to monitor X, f3, and y rays. The product has the characteristics of high sensitivity and accurate measurement and is equipped with a high-performance microprocessor and TFT 2.0 color screen, which makes the operation convenient and the anti-interference ability strong. It has audio and visual alarms. The alarm thresholds can be set. The product will raise alarms when the thresholds are reached. The main specifications conform to national and international standards.
Applications
UT334A is widely used in home decoration, radiation processing enterprise, health and epidemic prevention, radiation therapy, nuclear laboratory, nuclear power plant, import and export inspection, building materials, petrochemical, geological survey, scrap steel, industrial nondestructive testing, and other environments existing ionizing radiation, personal radiation dose supervision and protection occasions.
Total Dose Limit
Professional staff:
| The annual average effective dose for 5 consecutive years | 200mSv |
| The effective dose in any year | 50mSv |
| Annual equivalent dose of the lens of the eye | 150mSv |
| Annual equivalent dose for extremities (hands and feet) or skin | 500mSv |
Ordinary people:
| Annual effective dose | 1mSv |
| The effective dose for a single year if the average annual dose for 5 years does not exceed lmSv | 5mSv |
| Annual equivalent dose of the lens of the eye | 15mSv |
| Annual equivalent dose for extremities (hands and feet) or skin | 50mSv |
Common sense of radioactivity:
International Standard-1990
Professional staff: 20mSv/year (10uSv/hour)
Ordinary people: 1mSv/year (0.52uSv/hour)
Features
- Measure dose rates in real-time and record total doses
- Calibration function
- Adjustable alarm thresholds
- The start time of current dose accumulation can be viewed.
- Scheduled measurement (00-999h)
- Over-limit alarm
- Save the records of the last ten measurements
- The clock runs normally after the product is turned off.
- Monitor battery status
- English/Chinese optional
- Sensor fault warning ( “Device damaged” will show on the display.)
- In the sleep mode, if the radiation dose exceeds the set alarm threshold, the product will automatically alarm and enter the measurement interface.
Specifications
| Sensor | G-M counter tube |
| Range | 0.05uSv-50mSy |
| Accuracy | -17%∼+25% based on¹³⁷ CSy |
| Charging interface | Type-C interface (The green light is on when charging, and off when fully charged.) |
| Alarm response time | td, < 10s |
| Alarm threshold accuracy | -17%∼+25% |
| Alarm modes | Audio and visual alarms |
| Detected rays | X, β, and y rays |
| Battery | 3.7V 1800mAh |
| Battery life | 20 days (continuous measurement, particle sound off) |
| Product weight | 127g |
| Product size | 120*65*25mm |
: Power/select
: Step through menus to the left/subtract value
: Step through menus to the right/add value
Operation
- Power on
Long press 3s to turn on the product and enter the main interface. - Power off
Long press for 3s to turn off the product.
Note: When
shown on the screen, the product cannot be turned off. If users need to turn it off at this time, enter the “Schedule” interface to stop timing. - Measure
Enter the “Measure” interface to view real-time dose rate (0.05uSv-50mSv), average dose rate (0.05uSv-50mSv) and total dose (0.1uSv-9999mSv). - Schedule
Enter the “Schedule” interface to set the start delay time (00-99h) and the measurement time (00-999h). Select “Start timing” and press - and the product will start the countdown. When the start delay countdown returns to zero, the real-time dose rate, average dose rate, and total dose will also return to zero and the product will start measuring the radiation dose and total dose rate. When the measurement time countdown returns to zero, the product will automatically save the interval measurement data. Users can find these data in the “Records” interface.
Note: Start delay is the countdown to start the measurement, and the hour, minute, and second can be set. Select “Start timing” and press to start the countdown. When the countdown ends, the measurement begins. - Records
After each scheduled measurement, the product will automatically save one history record. A maximum of 10 records can be saved. After 10 records are saved, the new record automatically replaces the last one if users continue to store the new record. - Delete
Enter the “Delete” interface to delete current data or historical data. The current data is the average dose rate and total dose. The history data is all data in historical records.
Note: Historical records cannot be restored after being deleted. When shown on the screen, the product cannot enter the “Delete” interface.
Select “Calibration factor” and press twice, and “Password: 0000” will appear at the bottom of the screen. Press to adjust “0000” to “0018”, and press to confirm. Press or On to adjust the calibration factor, and press to save. It is used to calibrate the error in the range of 20uSv-1uSv.
Note: Cf=1.00 by default
Calibration factor Cf= Personal dose equivalent Hp (10) reference value/Device indicating value
Technical specification for calibration (code, name): JJG 1009-2016 Personal Dose Equivalent Hp (10) Monitors for X and y Radiations - Alarm
Dose rate: 0.1uSv-999uSv
Total dose: 1uSv-9999uSv
The product will raise alarms when the thresholds are reached. - Unit
In the unit setting interface, select “unit”, press, and then press or switch between uSv and uGy. The language can be English or Chinese. - Sound
In this interface, the alarm volume and alarm times can be set. Adjust the alarm volume to 0, and the sound will be turned off. If the particle sound is turned on, when ions enter the sensor, the product will make a particle sound. - Clock
In this interface, the date (year/month/day) and time (hour/minute/second) can be set.
Note: It is recommended to set the clock to the local date and time before using the product. - Sleep
Screen sleep: The unit of screen sleep time is a minute. When it is adjusted to, the screen will not sleep.
Auto shutdown: The unit of auto shutdown time is an hour. When it is adjusted to, the auto shutdown function is turned off. Users only can long press to power off at this point.
Screen brightness: Adjust the screen brightness.
Cautions
- Please turn off the product after use. If not used for a long time, please fully charge the product and turn it off. Batteries need to be recharged every 12 months.
- When the battery status is low, charge the battery in time to ensure measurement accuracy.
- Turning on particle sounds reduces battery life.
- The manual version is subject to update without prior notice.
Safety Instructions
| Accidental fall of product | Please confirm whether the measured values are normal and whether they will be updated. If any abnormality is found, do not use the product in places with strong radiation. |
| “Device damaged” shows on the display. | Please do not use the product in places with strong radiation. |
| The operating environment contains explosive and flammable gas or dust. | Do not use the product in this environment. |
| Waterproof | The waterproof grade of the product is IP40, and cannot get wet or splashed. |
| Energy response | The X-ray can only be used as a reference to test radiation intensity and cannot meet the energy response requirements. |
Packing List
| Radiation dose tester | 1PC |
| User manual | 1PC |
| Carrying bag | 1PC |
| Data cable | 1PC |
| Hand strap | 1PC |
UNI-TREND TECHNOLOGY (CHINA) CO., LTD.
No.6, Gong Ye Bei 1st Road,
Songshan Lake National High-Tech Industrial
Development Zone, Dongguan City,
Guangdong Province, China
Tel: (86-769) 8572 3888
www.uni-trend.com
P/N:110401111223X
2022/06/29 REV.0
Documents / Resources
 | UNI-T UT334A Radiation Dose Tester [pdf] User Manual UT334A, Radiation Dose Tester, UT334A Radiation Dose Tester |
