403125 Datasheet, PDF (3/8 Pages) Extech Instruments Corporation. – Digital Light Meter

Specifications
General Specifications
Display
Over range indication
Measurement rate
Battery power
Battery life
Low battery indication
Operating conditions
Storage conditions
Analog output
Dimensions
Weight
3 ½ digit backlit LCD display (reads 0 to 1999)
OL (over load) is displayed
2.5 readings per second (nominal)
Four (4) 1.5V ‘AAA’ batteries
200 hours typical
Battery symbol is displayed when the battery power drops
below the operating voltage
32 to 122^oF (0 to 50^oC) < 70% Relative Humidity
-4 to 140^oF (-20 to 60^oC) < 80% Relative Humidity (with
batteries removed)
0.1mVDC per display digit
6.7 x 1.7 x 1.6" (170 x 44 x 40mm)
Approx. 7.76 oz. (220g) with batteries
Electrical Specifications
Ranges
Resolution
Accuracy
Spectral response
Peak Hold response
Acceptance angle
Units conversion
Temperature Coefficient
20, 200, 2000, 20,000 fc and lux (note that the 20,000 range is
displayed in the x10 mode, meaning that the display must be
multiplied by 10).
0.01 lux/fc maximum
20, 200 ranges: ± (5% of reading + 10 digits)
2000, 20,000 ranges: ± (3% of reading + 10 digits)
Accuracy note: Stated accuracy for ± 9^oF at 73^oF (±5^oC at
23^oC) < 70% Relative Humidity
CIE photopic
Note: The CIE photopic curve is an international standard for
the color response of the average human eye. The CIE
standard illuminant ‘A’ is defined as a gas-filled Tungsten-
filament lamp operating at a correlated color temperature of
2856K.
50ms minimum response time for the measurement of a light
pulse
f ’₂ < 2% cosine corrected (150^o)
10.764 fc = 1 lux (lumens/meter²)
0.0929 lux = 1 fc (lumens/foot²)
0.056 times the specified accuracy per ^oF (< 64.4^oF or >
82.4^oF)
0.1 times the specified accuracy per ^oC (< 18^oC or > 28^oC)
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403125 V3.1 9/06