User Manual

LT505-en-GB_V1.1 1/18
3
1. Battery status
2. Auto Power OFF (APO)
3. Data Hold
4. Maximum reading
5. Average reading
6. Minimum reading
7. Measurement
8. Units of measure
9. Calibration (ZERO)
Operation
Meter Power
Power the meter by long pressing the button. The meter will begin displaying light intensity
readings. If the LCD does not switch on, check the batteries located in the rear battery
compartment. Short press power button to turn OFF the meter.
Zero Calibrate the Sensor
1. Place the protective cover over the sensor and press the button to power on the meter.
2. If the display does not read ‘0.0’ short press the button.
3. The CAL icon will appear in the secondary display.
4. The CAL icon will switch OFF when the calibration has been completed.
5. If the protective cap is not covering the sensor when the button is pressed, the LCD
display will read “CAP”. In this case, please cover the sensor with the cap and restart this
procedure.
6. It is recommended that the meter be switched off and then on again when repeating the
zero calibration function.
Taking Measurements
Remove the sensor cover and aim the sensor toward the light source. View the measurement on
the meter’s display.
Selecting the Unit of Measure
Press the button to toggle the units between Lux and Foot-candles. The units will indicate in
the display.
Data Hold
Short press the button to freeze or unfreeze a reading on the display.