User's Manual

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.
Specifications
Units Ranges and
Resolution
Accuracy
Lux 20.00, 200.0, 2000,
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
Spectral accuracy CIE V function (f’
1
ï 6%)
Measurement Repeatability ±2%
Calibration Calibrated to a standard incandescent lamp at
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 3’ (91cm) approximately
Low battery indication “BT” appears on the LCD
Power supply 6 ‘AAA’ cells; Battery life approx 400 hours