User Manual

LT45-EN v1.4 9/13
8
Specifications
Sampling rate
2.5 times per second (digital display)
Display
6-digit LCD with battery icon, measurement overload, and
other function indicators
Sensor (detector)
Silicon photodiode with spectral response filter and cosine
correction
Ranges and Resolution
Lux: 399.9, 3999, *3999
9
, *3999
99
Foot-candles: 39.99, 399.9, 3999, *3999
9
*Above 3999, the LCD uses smaller digits on the right side
(1 Fc = 10.76 Lux)
Auto-range
The meter automatically ranges the display
Accuracy
± (3% of reading + 3 digits) up to 500 Lux
± (3%) above 500 Lux
Calibrated to standard incandescent lamp 2856
o
K at an
ambient temperature of 73
o
F (23
o
C)
±6% for other visible light sources
Angle deviation from cosine
characteristics
30
○
±2%
60
○
±6%
80
○
±25%
LED Types Meter measures white, red, yellow, green, blue, purple LED light
Operating conditions Temperature: 41 to 104
o
F (5 to 40
o
C); Humidity: < 80% RH
Storage Temperature/RH 14 to 140
o
F (-10 to 60
o
C); Humidity: < 70% RH
Battery status indication Battery symbol appears empty when battery voltage reaches critical level
Power supply 9V battery
Auto Power OFF Meter powers down after 5 minutes of inactivity (can be defeated)
Dimensions Meter: 1.5 x 2.2 x 5.1” (38 x 55 x 130mm)
Sensor: 9.8 x 2.2 x 3.1” (25 x 44 x 80mm)
Cable length: 4.9’ (1.5m)
Weight Approx. 8.8 oz. (250g) with battery installed