User Manual

LT300 V2.0 6/06
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Introduction
Congratulations on your purchase of the Extech LT300 Digital Light Meter. The LT300
measures light level (illuminance) to 200,000 Lux (20,000 Fc). The LT300 offers a backlit
display, MAX/MIN, Data Hold, Relative, Peak, and Reset features. This instrument is
shipped fully tested and calibrated and, with proper use, will provide years of reliable
service.
Meter Description
1. Sensor cable
2. Analog bargraph
3. Numerical display
4. RANGE button
5. ON/OFF button
6. MAX/MIN button
7. RESET button
8. LCD Backlight button
9. LUX button
10. Fc foot candle button
11. Protective rubber jacket
12. RELATIVE button
13. Data HOLD button
14. PEAK button
15. Photo sensor dome
Notes: Protective sensor cap not shown. Battery compartment, Tilt Stand, and Tripod Mount are located on the rear
of the instrument. The protective rubber jacket must be removed from meter to access battery compartment.