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.