Extech Instruments LT40 User Manual

LT40-en-GB_V3.0 10/17
6
Specifications
Units Range Resolution Accuracy
Lux



999.9 0.1
WhiteLED:
±(3%reading+3Lux)upto500Lux
±(3%reading)>500Lux
Otherlightsources:Unspecified
9,999 1
99,990* 10
400,000* 100
Foot
candles
99.99 0.01
WhiteLED:
±(3%reading+0.3Fc)upto46Fc
±(3%reading)>46Fc
Otherlightsources:Unspecified
999.9 0.1
9,999 1
40,000* 10
*Readingsabove9999useax10orx100multiplier(1Fc=10.76Lux)
Angledeviationfromcosine
characteristics
30° ±2%
60° ±6%
80° ±25%
GeneralSpecifications
Samplingrate 2.5timespersecond(digitaldisplay)
Photodetector Siliconphoto‐diodewithcosinecorrection
Display4‐digitLCD(maximumdisplay:9999)withlowbatteryicon,
measurementoverload,andotherfunctionindicators
AutoRangeMeterautomaticallyrangesthedisplay
Operatingconditions Temperature:5to40
o
C(41to104
o
F);Humidity:<80%RH
Storageconditions Temperature:‐10to60
o
C(14to140
o
F);Humidity:<70%RH
Lowbatteryindication
appearsontheLCDwhenbatteryvoltagefallscriticallylow
LEDType WhiteLEDlight
Powersupply 2x1.5V‘AAA’batteries
Batterylife Approximately200hours
AutoPowerOFF MeterswitchesOFFafter12minutesofinactivity
Dimensions 133x48x23mm(5.2x1.9x0.9”)
Weight 250g.(8.8oz.)includingbatteries
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Extech Instruments LT40 Specifications

General

Brand	Extech Instruments
Model	LT40
Category	Measuring Instruments
Language	English