TN-UV254 Digital UV radiometerDetailed product description：

Model: TN-UV254 Digital UV Radiation Illuminometer

Product Description: How to Translate
The digital ultraviolet radiometer is an instrument that measures the intensity of ultraviolet radiation with a wavelength of 253.7nm. Using specialized blind tube ultraviolet sensor technology, it is not affected by other radiation such as sunlight and light, has high measurement accuracy, and stable performance. It has automatic battery undervoltage indication and data retention function. The overall design is compact and very convenient to use. Suitable for monitoring the irradiation intensity of ultraviolet lamps used for disinfection in hospitals, health and epidemic prevention departments, chemical, electronic, food processing plants, entertainment venues, etc. Compared with the commonly used ultraviolet radiation illuminance meter, this instrument has significant technical advantages and is an upgraded product of the commonly used ultraviolet radiation illuminance meter. Specifically manifested in:
The blind tube technology ultraviolet radiation illuminance meter is not affected by other radiation such as sunlight and has high measurement accuracy, specifically measuring 254nm ultraviolet radiation intensity. At present, the commonly used irradiation equipment does not indicate zero after being turned on, and the indication value changes unpredictably every time it is turned on, because it is affected by visible light and other wavelengths of mixed ultraviolet light, and cannot truly reflect the actual irradiation intensity of the lamp tube, leaving hidden dangers for the disinfection effect of ultraviolet lamps.
The balanced circuit ultraviolet radiation illuminance meter has stable performance and no data drift. At present, the reproducibility of commonly used ultraviolet radiation illuminance meters is usually poor, especially with the increase of usage time, the readings of the same intensity light source are different every year, which brings a lot of trouble to dealers and causes confusion and distress to users.

User Manual: How to Translate
I. Overview
The digital ultraviolet radiometer is an instrument that measures the intensity of ultraviolet radiation with a wavelength of 253.7nm. Using specialized blind tube ultraviolet sensor technology, it is not affected by other radiation such as sunlight and light, has high measurement accuracy, and stable performance. It has automatic battery undervoltage indication and data retention function. The whole machine is compact in design and very convenient to use. Suitable for monitoring the irradiation intensity of ultraviolet lamps in hospitals, health and epidemic prevention departments, chemical, electronic, food processing plants, entertainment venues, etc.
This user manual includes relevant safety information and warning prompts. Please read the relevant content carefully and strictly follow all warnings and precautions.

2、 Open box inspection
Open the packaging and take out the instrument, carefully check if the following accessories are missing or damaged:

TN-UV-254 digital ultraviolet radiometer, one unit
One pull rod locator
One user manual
A pair of goggles
One calibrator
If any missing or damaged items are found, please contact your supplier immediately

3、 Technical instructions for TN-UV254 digital ultraviolet radiometer
Display mode: LCD display, maximum reading is 1999
Measurement principle: Dual integration A/D conversion
Sampling speed: approximately 3 times per second
Storage environment: Store in a room temperature, dry environment
Working environment: Temperature range of 10-30 ℃, temperature range of 30 ℃ ≤ 85% RH
Battery undervoltage indicator: "+-" displayed below the LCD
Over range indication: display "OL" or "I" at the highest position
Data retention function: "H" displayed above the LCD
Measurement wavelength: 254 ± 10nm
Measurement angle: Take the perpendicular line to the sensing surface of the sensor as the axis, and circle around the axis ± 10
Range: 0-2000 μ w/cm2, 0-20000 μ w/cm2, display "× 10" below the LCD
Resolution: 1 μ w/cm2
Power supply battery: 9V alkaline or carbon zinc battery 6F22
Battery life: About 200 hours for alkaline batteries and about 100 hours for carbon zinc batteries
Dimensions: Display header: 149 × 71 × 41 (mm); Probe sensor θ 29 × 33 (mm); Wire length 2m
Weight: Approximately 300 grams (including battery)
Execution standard: Complies with Q/KWD001-2006 standard

4、 Key function
1. Power on key: POWER is used to turn on and off the power of the instrument panel. Press once to turn on the power, and press again to turn off the power. Cycle the switch. Please make sure to turn off the power when not in use.
2. Data hold is used to maintain the current measurement results. Press the HOLD data hold button to keep the current value displayed on the instrument panel. When turned off, it will show "H" above the LCD. Press the HOLD data hold button again to exit the display hold function.
3. Range selection key: When the × 1 key is pressed once, the measurement range is 0-2000 μ w/cm2
When the X 10 key is pressed, the measurement range is 0-2000um/cm2, and the X 10 is displayed below the LCD

5、 Usage method
1. Pull the pull rod completely apart (1 meter)
2. Remove the probe protective cover and attach the probe to the rod (do not shake it casually after firmly attaching to prevent the probe from falling), so that the sensor window of the probe points vertically towards the measured ultraviolet light source, and be careful not to block the sensor window.
3. Hook the rod in the center of the UV disinfection lamp to be tested and turn on the UV disinfection lamp. Wait for the lamp to work stably.
4. Turn on the power switch of the radiometer, select the measurement range, and wait for the measurement range result to stabilize before reading.
5. After the measurement is completed, retract the rod and remove the probe, cover the probe cover, turn off the power, and store it in a dedicated instrument box.

6、 Maintenance, upkeep, and safe operation guidelines
If the battery undervoltage indicator symbol appears, it indicates that the battery needs to be replaced. You can use a screwdriver to unscrew the screws on the battery cover and move the battery cover away to remove the old battery and replace it with a new 9V battery. Then put on the battery cover and tighten the screws. If the instrument is not used for a long time, please remove the battery to avoid battery leakage and damage to the instrument.
Instruments should be maintained and used by dedicated personnel. Proofread according to national requirements for measuring products. Be careful not to store, use, or clean instruments in high temperature, high humidity, flammable, explosive, and strong magnetic environments. Only use a damp cloth and a small amount of detergent to clean the instruments. Do not use chemical solvents to wipe the case. If any abnormalities are found in the instruments, stop using them immediately and send them for repair.
When it is necessary to calibrate or repair the instrument, if there are no professional maintenance personnel or designated maintenance departments in the local area, it should be sent back to our company for repair to ensure the measurement performance of the instrument after repair.
Due to the harmful effects of ultraviolet radiation on human skin and eyes, safety precautions should be taken during measurement to avoid damaging physical health. Do not change the internal wiring of the instrument to avoid damaging it and endangering safety.