18
Measuring the Illuminance Difference / Ratio
1
Push out the hold button to switch from HOLD to RUN.
2
Place the receptor head in the desired measuring position.
The measured illuminance difference or ratio will appear.
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Each time the [
⊿] key is pressed, the illuminance
difference or ratio will appear alternately.
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Example)
←
20 lx brighter than the reference value
←
30 lx darker than the reference value
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The measured illuminance is displayed in a percentage (%), with the
reference value set as 100.
←
87.4% of the reference value
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To check the currently set reference value, press the [CALL] key. The
reference value will be displayed while the [CALL] key is held down.
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Once the reference value is set, it will remain effective until it is changed.
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To delete the reference value, carry out the steps described in 2, “Entering the desired reference value
numerically” and then enter “0”.
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The display range of illuminance difference is from “- reference value” to “maximum display value within
the measuring range - reference value”.
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The display range of illuminance ratio is from 0.0% to 999.9%. “----” will blink if the illuminance
ratio
exceeds this range.
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