We are using your photosensitive sensor, model OPT3001. In actual use, we found that the measured value has a large deviation from the measured value of the standard illuminometer (UT383). We would like to ask if your company has a solution.
My sensor is initialized to a continuous sampling mode with a sampling period of 800ms. The maximum measured value is limited to 5241.60lux (that is, the value of the configuration register register 0x01 is set to 0x7C10).
The measurement method is as follows:
(1) Experimental equipment: light sensor equipment (equipment developed by our company using OPT3001), light meter (UT383, standard light measuring instrument), light source equipment (light equipment developed by our company)
(2) Establishment of experimental environment: the light sensor equipment and the light meter are placed in the same environment, the light source equipment directly shines on the two equipment, adjusts the brightness of the light source equipment, and records the values of the sensor and the light meter.
(3) The measured data are as follows:
| Test environment: daily office environment of Tong'an Verification Section Office, SI08B: v1.0.28 Light source: IEM-25BC-TW color temperature 3000K Illuminometer: Ulead UT383 mini illuminometer Test method: after the sensor is reset, it is added to the test site. Status configuration: not configured. The default value of brightness sensitivity and deviation is 5%. The inductor, light meter and light source are placed on the same horizontal plane with a straight-line distance of 23cm. |
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| Light source: IEM-25BC-TW Brightness (%) |
Illuminometer display data (lux) | Sensor Display Data (38B8) Data before calibration (lux) |
Sensor Display Data (38B8) Data after calibration (5% data calibration, lux) |
disparity | ratio |
| 0 | 175 | 72 | 170 | -5 | -2.86% |
| 5 | 936 | 299 | 912 | -24 | -2.56% |
| 10 | 1254 | 391 | 1349 | 95 | 7.58% |
| 15 | 1558 | 492 | 1537 | -21 | -1.35% |
| 20 | 1863 | 579 | 1854 | -9 | -0.48% |
| 25 | 2127 | 675 | 2154 | 27 | 1.27% |
| 30 | 2401 | 760 | 2438 | 37 | 1.54% |
| 35 | 2669 | 852 | 2734 | 65 | 2.44% |
| 40 | 2906 | 916 | 3047 | 141 | 4.85% |
| 45 | 3187 | 1029 | 3367 | 180 | 5.65% |
| 50 | 3445 | 1099 | 3647 | 202 | 5.86% |
| 55 | 3685 | 1203 | 3931 | 246 | 6.68% |
| 60 | 3979 | 1290 | 4191 | 212 | 5.33% |
| 65 | 4186 | 1376 | 4483 | 297 | 7.10% |
| 70 | 4440 | 1452 | 4755 | 315 | 7.09% |
| 75 | 4680 | 1537 | 5000 | 320 | 6.84% |
