Specifications Measuring Range of Illuminance: Low: 0 -1000 Lx (Red scale) Ordinary: 0-5000 Lx (Black scale) High: 0-50000 Lx (by using the Slide of x10 multiplier) Accuracy : ± 10% (tested by a standard parallel-light tungsten lamp of color temperature 2854°K) without including the resolution for the meter (the value deserves minimal scale 1/2)in this accuracy.
How to operate the Illuminometer 1. Getting ready for measurement All you do for preparation is just to insert the LUMIDISC into position. To insert it, match the white dot (or the red dot for low measurement) on the lumidisc to the white dot on the swivel-head of the meter. Turn the lumidisc clockwise lightly to about 45° until it tightly fits. 2.
5. Swivel-Head The swivel-head is one of the most advantageous features of this meter. Swivel the head of the meter to the right or left when the measurement is difficult due to the position of the surface to be measured. 6. Zero setting adjustment When the light receptor is completely covered by hand (a condition where no light enters into the light receptor), the pointer should be at zero. If it isn't, turn the zero adjusting screw on the back until the pointer comes to the zero position. 7.