UV integrator domestic metering status quo

Domestic ultraviolet irradiance standards
The ultraviolet radiation illuminometer often said as UV energy meter. Of ultraviolet radiation illuminance meter (UV energy meter) With economic development, more and more industrial, the traceability of ultraviolet radiation illuminometer become increasingly important. The international division of the ultraviolet band is not uniform. Ultraviolet radiation band division, A1, A2, B, C is divided into four kinds of band. Corresponding to the above four-band ultraviolet light source has a high-pressure mercury lamp, a black light-type high-pressure mercury lamp and low pressure mercury lamp.

The the UV irradiance benchmark mainly by spectral radiometer, standard ultraviolet radiation illuminometer, various UV source for storage and reproducibility of UV irradiation metric. However, due to the above-mentioned standard was built in 1989, has not completely meet the traceability requirements of the modern market UV irradiation. Gradually increased with the introduction of such instruments abroad, UV irradiation of calibration has appeared in the coexistence of multi-national standards, giving the majority of the ultraviolet radiation illuminometer users cause distress.

Second, the national standards coexist market

Currently, three countries, the United States, Germany, Japan, the production of irradiation of the domestic market share is still quite large, relatively speaking, the instrument to do good, good stability, long service life. But there is a big problem, even with a national standard does not seem to be completely unified. For example, American Standard, UV irradiance are traceable to NIST, but it had a different measurement results. Typical two the radiation meter manufacturers, EIT and International Light, same instrument measured A band, with national standards test, the the EIT indication error of 30% to 70%, International Light Indication error controlled at less than 10%, which is substantially consistent and national standards. Instruments in Germany and Japan, there are also the same problem, and have consistent national standards instrument measurement results far cry from the instrument. As a German two different models of the same manufacturer instrument measurement band is consistent with the measured results are very different. This may be caused not consistent spectral response of the calibration light source or the instrument detector. In short, international UV irradiance is not a unified standard to constraints caused by the manufacturer of the coexistence of multi-national standards, which is also difficult to ultraviolet irradiance measurements.

Here it is necessary to talk about ultraviolet irradiance standards in international comparison. 1, the same company as much as possible to use the same manufacturer, the same type of instrument, easy money unified, to facilitate the company's internal records and compare. The same different models illuminometer measurement, measurement results may also have a greater difference.

2, industrial UV light irradiance is not very stable and uniform, preferably a few times and measurements. UV lamp typically need open after a period of time, the the emission situation was stabilized.

3 is used for many measurements curing energy of instruments, many just care about a reading, production experience, for example, using an instrument measured 1000mJ/cm2 energy curing good, maybe this instrument and GB big difference, but you Just know that the instrument measured 1000mJ/cm2 it is normal to pay attention is the annual rate of change of the instrument, or the instrument plus a correction factor correction according to the data given by the calibration certificate re-record a reading.

4, not all of the instruments can be calibrated in accordance with the existing national standards, so when the instrument was detected large measurement error, confirm the instrument's measurement band is consistent with national standards, such as inconsistencies, either sent back to the original factory inspection, either on the basis of a calibration certificate corrected reference to use.

5, the annual rate of change of the particularity of the detector material due to ultraviolet radiation meter production is quite large (especially domestic instruments, foreign instruments do relatively well), plus the use of frequent, it is easy to generate money drift, doubt the best and timely submission of money.

6 Note that the life of the meter of the ultraviolet irradiation, in particular close to the life or extended use of UV radiation meter, reference should be used.

7, for some special radiation meter, measured a large range (such as W or J level) special bands (such as the UVV band visible radiation), No VRof, can send the original units of the national metrology institute Calibration.

Finally, a simple C-band instruments, these instruments are mainly used in the medical field, because the short wave ultraviolet disinfection, the measurement range is relatively small, such instruments are mostly made in China, with a high degree of consistency GB.

Based on the data and my experience, for your reference.
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