Specifications; General Specifications; Measurement Specifications; Environmental Specifications - Extech Instruments LT250W User Manual

7

Specifications

7.1 General Specifications

Display
Over range indication
Low battery indication
Reading update rate
Sensor
Meter power
Dimensions
Weight

7.2 Measurement Specifications

Accuracy specifications apply for the following conditions:
Temperature: 73.4℉ ± 9℉ (23℃ ± 5℃); Relative Humidity: ≦ 80 %
Illuminance ranges
0 to 9999 Lux
≧ 10,000 Lux
≧ 100,000 Lux
Notes:
The total range is 0 to 199,900 Lux
Foot candle (Fc) readings are converted from Lux measurements
Readings above 9999 are accompanied by a x10 or x100 indicator

7.3 Environmental Specifications

For indoor use only
Altitude
Pollution degree
Operating conditions
Storage conditions
Drop-proof rating
#NAS100076; r. AA/78957/78963; en-US
4 digit (9999) backlit multifunction LCD. Readings > 9999 are
accompanied by a x10 or x100 indicator
OL is displayed when a measurement is out of range
Battery symbol appears when batteries are low
Two readings per second
Silicon photo-cell
Three (3) 1.5 V (AAA) batteries
6.4 x 2.2 x 1.1 in. (163 x 55 x 28 mm)
4.2 oz. (118 g)
Resolution
1 Lux
10 Lux
100 Lux
6562 ft. (2000 m) maximum
2
32 to 104℉ (0 to 40℃); < 80% RH
-4 to 140℉ (-20 to 60℃); < 75% RH
3.3 ft. (1 m)
Accuracy (% of reading)
± (4% + 8 digits)
± (5% + 10 digits)
± (5% + 10 digits)
10