Domestic current situation of ultraviolet radiation illuminance meter UV energy meter measurement
China UV Radiation Illuminance Standards
UV radiation meters are often called UV energy meters. With the development of the economy, ultraviolet radiation meters (UV energy meters) are increasingly used in industry, and the traceability of ultraviolet radiation meters has become increasingly important. The international classification of ultraviolet bands is not uniform. China currently divides ultraviolet radiation bands into four bands: A1, A2, B, and C. The ultraviolet light sources corresponding to the above four bands include high-pressure mercury lamps, black-light high-pressure mercury lamps and low-pressure mercury lamps.
China's ultraviolet radiation illuminance working benchmark mainly consists of a spectral radiometer, a standard ultraviolet radiation illuminance meter, various ultraviolet light sources, etc., which are used to store and reproduce ultraviolet radiation measurement values. However, since the above standards were established in 1989, they can no longer fully meet the modern market’s traceability requirements for UV irradiation meters. With the gradual increase in the introduction of such instruments from abroad, the calibration of ultraviolet radiation meters has seen the coexistence of multi-national standards, which has caused trouble to the majority of users of ultraviolet radiation meters.
UV radiation illuminance meter UV energy meter measurement domestic current situation and solutions
In response to this relatively chaotic situation, the best solution is to unify standards. As far as the UV irradiance meters currently used in industrial production are concerned, most of them are used in UV curing and UV exposure to measure the radiant illumination or energy of UV furnaces or UV lamps. The wavelength bands are UVA and UVB and are used to measure UV radiation energy. There are more instruments, commonly known as UV energy meters. For use and calibration we recommend:
1. The same company should use the same model of instruments from the same manufacturer as much as possible to facilitate the unification of measurement values and facilitate internal recording and comparison within the company. When measuring with different models of illuminance meters from the same company, the measurement results may be quite different.
2. The irradiance of industrial UV lamps is not very stable and uneven. It is best to measure several times when measuring. It usually takes a while for the UV lamp to stabilize after being turned on.
3. For many instruments used to measure curing energy, in many cases they only care about one reading. For example, according to production experience, a certain instrument is used to measure 1000mJ/cm2 energy, and the curing is good. Maybe this instrument is very different from the national standard, but you As long as you know that this instrument measures 1000mJ/cm2, it is normal. At this time, you should only pay attention to the annual change rate of the instrument, or add a correction factor to the instrument based on the data given in the calibration certificate, and record a new reading after correction.
4. Not all instruments can be calibrated according to existing national standards, so when the instrument is detected to have a large measurement error, confirm whether the measurement band of the instrument is consistent with the national standard. If it is inconsistent, either send it back to the original instrument. Factory inspection, or correction according to the calibration certificate, and then used as a reference.
5. Due to the particularity of the detector materials used in ultraviolet radiometers, the annual change rate is still relatively large (especially domestic instruments, foreign instruments are relatively good), coupled with frequent use, it is easy to produce value drift. If you have doubts about the value, it is best to submit it for inspection in time.
6. Pay attention to the service life of the ultraviolet irradiation meter. Especially for ultraviolet irradiation meters that are close to their service life or have been used for an extended period, they should be used with reference to the local conditions.
7. For some special radiometers that measure large ranges (such as W or J level) and special bands (such as UVV band visible light radiation), there are currently no calibration regulations. They can be sent to the original manufacturer, the National Institute of Metrology and other units for testing. calibration.
