① Turn on the power.
② Open the photodetector cover and place the photodetector horizontally in the measuring position.
③ choose suitable for measuring stalls.
If only the left end of the display shows "1", it means that the illuminance is excessive. You need to press the range key (⑧ key) to adjust the measuring magnification.
④ The illuminometer starts to work and displays the illuminance value on the display.
⑤ display on the display data constantly changing, when the display data is relatively stable, press the HOLD key (⑧ key), lock the data.
⑥ Read and record the observed values displayed in the reader. The observed value is equal to the product of the number and range values displayed in the reader.
For example: the screen shows 500, the lower right corner shows the status of "× 2000", the illumination measurement value of 1000000lx, that is (500 × 2000).
⑦ Press the lock switch again to cancel the reading lock function.
⑧ every time the observation, continuous reading three times and record.
⑨ After each measurement work is completed, press the power button, cut off the power.
⑩ cover the photoresist cover and put it back in the box.
