Do you have a question about the Extech Instruments LT505 and is the answer not in the manual?
Instructions for powering the meter on and off.
Procedure for calibrating the sensor to zero.
How to aim the sensor and view measurements.
How to toggle between Lux and Foot-candles.
How to freeze or unfreeze readings.
Explains tracking maximum, average, and minimum readings.
Ensure light falls perpendicularly on the sensor for accuracy.
Protect sensor, remove batteries for long-term storage.
Procedure for replacing the meter's batteries.
Guidelines for cleaning the meter and proper storage.
Examples of typical light levels in various environments.
Information on the meter's spectral sensitivity.
| Type | Light Meter |
|---|---|
| Light Source | LED |
| Resolution | 0.01 Lux |
| Resolution (alternative) | 1 lux (0 to 9, 999 lux), 10 lux (10, 000 to 50, 000 lux) |
| Display | LCD |
| Display Digits | 4 digits |
| Data Hold | Yes |
| Auto Power Off | Yes |
| Sensor | Silicon Photo Diode with Filter |
| Sampling Rate | 2.5 times per second |
| Battery | 9V battery (included) |
| Operating Temperature | 32°F to 122°F (0°C to 50°C) |











