LT300-EU-EN V2.3 2/13
3
Operation
Light sensor
1. The light sensor is permanently attached to
the meter by the coiled cable.
2. Remove the protective cap by unsnapping it
to expose the white domed light sensor.
When the
sensor s protective cap is removed, the white domed light sensor lens will begin to
capture light. Replace the cap when the meter is not in use.
Turn Power ON or OFF
Press the
button to turn power on or off. If the display does not switch on, check that the 9V
battery is installed and is fresh.
Selecting Lux or Foot candle units of measure
Press the
LUX
button to select lux units or the
Fc
button to select foot candle units.
Measurement Procedure
1. Remove the protective cap from the sensor so that the white domed light sensor is exposed
to the light. For overhead lighting, the sensor can be placed on a desk or table top. A tripod
mount and a tilt stand are located on the rear of the meter for convenience.
2. The display will indicate the light level in Fc or Lux.
3. Press the RANGE button to select the range that provides the maximum resolution. If the
OL appears the light measurement is out of range. Select another range using the RANGE
button.
4. Press the backlight button to illuminate the LCD display if needed.
MAX/MIN
The Max/Min function allows for recording and display of the maximum and minimum light
levels over time.
1. Press the
MAX/MIN
button. The
MAX
display icon will appear and meter will now display
and hold only the highest reading. The display will update only when a higher reading is
measured.
2. Press
MAX/MIN
button. The
MIN
display icon will appear and meter will now display and
hold only the lowest reading. The display will update only when a lower reading is measured
3. Press
MAX/MIN
again. The
MAX MIN
display icons will appear flashing and meter will now
display the current reading, but will continue to record the highest and lowest values.
4. Press
MAX/MIN
again to cycle through MAX and MIN displays.
5. To exit the MAX MIN mode, press and hold the
MAX/MIN
button until the
MAX
and
MIN
icons completely disappear.
Data Hold
Press the
HOLD
button to freeze the displayed reading. The
MANU
HOLD hold icon will appear
on the display. Press the
HOLD
button again to return to normal operation. When the Data Hold
function is enabled the analog bar graph will continue to display level changes.
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