Scope of application of ultraviolet irradiance meters
The ultraviolet radiation meter is an instrument that measures the intensity of ultraviolet radiation at a wavelength of 253.7nm. The measurement of ultraviolet radiation requires the use of specialized instruments for measuring ultraviolet radiation. It is a photosensitive instrument that measures the intensity of ultraviolet radiation. Radiation irradiance is a physical quantity of the number of radiation beams per unit area obtained by irradiating a planar object from a radioactive source, E watts per square meter of W.m incident surface power.
Performance characteristics of ultraviolet radiation meters
1. Stable performance and strong anti-interference ability;
2. Adopting digital display, the reading is convenient, comfortable, and beautiful;
3. Simple operation, reasonable structure, moderate volume, and convenient portability.
Scope of application of ultraviolet irradiance meters
The ultraviolet irradiance meter is suitable for monitoring the radiation intensity of ultraviolet lamps used for disinfection in hospitals, health and epidemic prevention departments, chemical, electronic, food processing factories, entertainment venues, and other places.
Calibration of illuminometer
Calibration principle:
Let Ls vertically irradiate the photocell → E=I/r2, change r to obtain the photocurrent values under different illuminances, and convert the current scale into the illuminance scale based on the corresponding relationship between E and i.
Calibration method:
By using a light intensity standard lamp and changing the distance l between the photocell and the standard lamp at an approximate working distance of a point light source, the readings of the ammeter at each distance are recorded. The illuminance E is calculated using the inverse distance square law E=I/r2. From this, a series of different illuminance photocurrent values i can be obtained, and the variation curve between photocurrent i and illuminance E can be drawn, which is the calibration curve of the illuminometer. This can be compared to the dial of the illuminometer, which is the calibration curve of the illuminometer.
Factors affecting the calibration curve:
When replacing photocells and ammeters, recalibration is required; After using the illuminometer for a period of time, it should be recalibrated (usually calibrated 1-2 times within a year); A high-precision illuminometer can be calibrated using a light intensity standard lamp; Expanding the calibration range of the illuminometer can change the distance r, or different standard lamps can be selected, using a small range ammeter.
