Technical Specifications; Technical Characteristics; Spectrum Response; Sensor - HT HT309 Manuel D'utilisation

6. TECHNICAL SPECIFICATIONS

6.1. TECHNICAL CHARACTERISTICS

Accuracy is referred to the following reference conditions: temperature 23°C ± 5°C with
relative humidity < 70%RH.
The instrument is calibrated for a standard white light source consisting of an incandescent
lamp, at a temperature/colour of 2856°K in compliance with Class A.
Calibration for LED sources (with spectrum response different from that of standard white
light) is based on the calibration for standard white light source in Class A using the
appropriate correction factors (see Table 1)
Illuminance measurement (Autorange)
Full scale (Lux)
Resolution (Lux)
Accuracy
Full scale (Fc)
Resolution (Fc)
Accuracy
NOTE 1: 1Fc=10.76Lux, 1Klux=1000Lux, 1Kfc=1000Fc
NOTE 2: for temperature/colours different from the reference one, accuracy becomes 6%reading
Distance range for luminous intensity measurement: 0.01 ÷ 30.47m / 0.01 ÷ 99.99ft
Accuracy on angular deviation from cosine characteristic

6.1.1. Spectrum response

The spectrum response of the photodiode with filter is almost identical to the CIE photo-
optical curve V(λ) as shown in the following graph.
100

6.1.2. Sensor

The sensor is a silicon photodiode with filter on the spectrum response.
40
0.01
40
0.01
30°
60°
80°
90
80
70
60
50
40
30
20
10
0
380 440 500
Wavelength (nm)
Fig. 2: CIE curve V(λ).
400 4000
0.1 1
± (3%reading)
400
0.1
± (3%reading)
560 620 680 740
EN - 9
40k
10
4000
1
± 2%
± 6%
± 25%
V(?)
V(λ)
HT307
HT309
HT309
400k
100
40k
10