Extech Instruments Easy View Digital Light Meter EA31 Manual Do Utilizador
EA31 V2.0 06/06
2
Introduction
Congratulations on your purchase of the Extech EasyView Digital Light Meter
which measures the amount of light falling on a surface (illuminance) in Foot-
candles or Lux. This device measures up to 20,000 Fc and 20,000 Lux. Careful
use of this meter will provide years of reliable service.
which measures the amount of light falling on a surface (illuminance) in Foot-
candles or Lux. This device measures up to 20,000 Fc and 20,000 Lux. Careful
use of this meter will provide years of reliable service.
Specifications
Units Ranges
and
Resolution
Accuracy
Lux
20.00, 200.0, 2000,
20.00kLux
20.00kLux
Foot-candles 20.00, 200.0, 2000,
20.00kfc
± (3% rdg + 0.5% FS)
±( 4% rdg + 0.5% FS, if > 10,000lux or
1,000fc)
General Specifications
Display
3-1/2 digit, 2000 count LCD
Over range indication
LCD displays ‘OL’
Spectral response
CIE photopic (CIE human eye response curve),
Cosine corrected
Cosine corrected
Spectral accuracy
CIE V
function (f’
1
ï 6%)
Measurement Repeatability ±2%
Calibration
Calibration
Calibrated to a standard incandescent lamp at
color temperature 2856ºK
color temperature 2856ºK
Temperature coefficient
±0.1% per
o
C
Sampling rate
2.5 times per second
Photo detector
Silicon photo-diode and spectral response filter
Operating conditions
Temperature: 32 to 104
o
F (0 to 40
o
C); Humidity: <
80% RH
Storage conditions
Temperature: 14 to 140
o
F (-10 to 50
o
C); Humidity:
< 80% RH
Dimensions
5.91 x 2.8 x 1.4" (150 x 72 x 35mm)
Weight
Approx. 11.3 oz. (320g) with battery
Photo Detector Dimensions 3.62 x 2.36 x 1.14” (92 x 60 x 29mm)
Detector cable length
Detector cable length
3’ (91cm) approximately
Low battery indication
“BT” appears on the LCD
Power supply
6 ‘AAA’ cells; Battery life approx 400 hours