Specifications - Extech Instruments LT40 User Manual

Specifications
Units
Lux
Foot
candles
* Readings above 9999 use a x10 or x100 multiplier (1 Fc = 10.76 Lux)
Angle deviation from cosine
characteristics
General Specifications
Sampling rate
Photo detector
Display
Auto Range
Operating conditions
Storage conditions
Low battery indication
LED Type
Power supply
Battery life
Auto Power OFF
Dimensions
Weight
Range Resolution
999.9
9,999
99,990*
400,000*
99.99
999.9
9,999
40,000*
30°
60°
80°
2.5 times per second (digital display)
Silicon photo‐diode with cosine correction
4 ‐digit LCD (maximum display: 9999) with low battery icon,
measurement overload, and other function indicators
M eter automatically ranges the display
Temperature: 5 to 40
Temperature: ‐10 to 60
appears on the LCD when battery voltage falls critically low
White LED light
2 x 1.5V 'AAA' batteries
Approximately 200 hours
Meter switches OFF after 12 minutes of inactivity
133 x 48 x 23 mm (5.2 x 1.9 x 0.9")
250 g. (8.8 oz.) including batteries
0.1
White LED:
1
±(3%reading + 3 Lux) up to 500 Lux
10
±(3%reading) >500 Lux
Other light sources: Unspecified
100
0.01
White LED:
0.1
±(3%reading + 0.3 Fc) up to 46 Fc
±(3%reading) >46 Fc
1
Other light sources: Unspecified
10
o
C (41 to 104
o
C (14 to 140
6
Accuracy
±2%
±6%
±25%
o
F); Humidity: < 80% RH
o
F); Humidity: < 70% RH
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