Thermohygrometer + Luxmeter + Yarkometer “TKA-PKM” (41) with verification
Main technical characteristics
| Illumination measurement range | 10 ÷ 200,000 lx |
| Limits of the basic relative error of illumination measurements | ± 8.0% |
| Brightness measurement range | 10 ÷ 200,000 cd / m2 |
| Limits of the basic relative error of brightness measurements | ± 10.0% |
| Air temperature measurement range | -30 ÷ +60 ° С |
| Limits of the basic absolute error of temperature measurements in the range from +15 to +25 ° С | ± 0.2 ° C |
| Limits of additional absolute error of air temperature measurements at air temperature, ° С from -30 to -10 inclusive above -10 to +15 inclusive above +25 to +45 inclusive above +45 to +60 |
± 0.3 ° C ± 0.1 ° C ± 0.1 ° C ± 0.3 ° C |
| Measurement range of relative air humidity | 5 ÷ 98% |
| Limits of the basic absolute error of measurements of relative humidity in the range from +15 to +25 ° С | ± 3.0% rel. ow. |
| Limits of permissible additional absolute error of relative humidity measurements when the air temperature changes by every 10 ° С in the range from -30 to +15 and over + 25 to +60 ° С | ± 3.0% rel. ow. |
| The limits of the additional relative error of the device when measuring optical quantities, due to a change in the sensitivity of the photometric head when the air temperature in the measurement zone changes by every 10 ° C in the range from -30 to +15 and over. +25 to +60 ° С | ± 3.0% |
The difference in the function of the relative spectral sensitivity of the photodetector of the Luxmeter is corrected by a system of light filters to match the function of the relative spectral luminous efficiency of monochromatic radiation for daytime vision V (λ) according to GOST 8.332.
The effective reference plane of the Luxmeter coincides with the front plane of the cosine attachment of the photodetector.
Dimensions
| – signal processing unit (no more) | 130 x 70 x 30 mm |
| – photometric head with a probe (no more) | 230 x 48 x 55 mm |
| Device weight (no more) | 0.3KG |
| Battery – Krona battery standard size | 9 in |
Combination of several measurement channels in one device at once. Possibility of measuring with one non-replaceable head. Compactness and ease of use.