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3. Selection of Units of Measurement (lx, fc)
Since this illuminance meter conforms to the International System of Units
(SI units), the lux (lx) is regarded as the reference unit. Some countries use
the footcandle (fc) which is not an SI unit. For this reason, this illuminance
meter provides a function to display readings converted to fc units with a
unit selector switch. Select the desired unit, as needed, prior to measure-
ment.
Be sure to turn off the power before selection.
Figure 4 shows the location of the lx-fc selector switch. Note that the
specifications and operation description in this manual are based on the lux.
Figure 4. Location of lx-fc Selector Switch
4. Automatic Power Off (AUTO POWER OFF)
This digital illuminance meter provides an automatic power-off function in
order to avoid using up the battery if you forget to turn off the power. This
function turns the power off about 30 minutes after any key is last pressed.
Immediately before turning the power off, the meter makes a beeping
sound. If you press any of the operation keys while the beeping sound is
on, this will extend the time of the automatic power-off function by 30
minutes. Whenever a plug is in the recorder output connector while the
