Photovoltaic cells are photoelectric elements that directly convert light energy into electrical energy. When light hits the surface of the selenium photovoltaic cell, the incident light passes through the metal film 4 and reaches the interface between the semiconductor selenium layer 2 and the metal film 4, and a photoelectric effect is generated on the interface. The magnitude of the generated potential difference has a certain proportional relationship with the illuminance on the light-receiving surface of the photovoltaic cell. At this time, if an external circuit is connected, current will flow, and the current value will be indicated on the microammeter with the scale of lux (Lx). The magnitude of the photocurrent depends on the intensity of the incident light and the resistance in the loop. The illuminance meter has a gear shifting device, so it can measure high or low illuminance.
The steps of using the illuminance meter:
①Turn on the power.
②Open the light detector cover and place the light detector horizontally at the measuring position.
③Choose suitable measurement gear.
If only "1" is displayed on the left end of the display, it means the illuminance is over, and you need to press the range key (⑧ key) to adjust the measurement multiple.
④The illuminance meter starts to work and displays the illuminance value on the display.
⑤The data displayed on the screen changes constantly. When the displayed data is relatively stable, press the HOLD key (⑧ key) to lock the data.
⑥ Read and record the observed value displayed in the reader. The observed value is equal to the product of the number displayed in the reader and the range value.
For example: 500 is displayed on the screen, the status is "×2000" in the lower right corner, and the measured value of illuminance is 1000000lx, that is, (500×2000).
⑦Press the lock switch again to cancel the reading lock function.
⑧ During each observation, read three consecutive times and record.
⑨After each measurement is completed, press the power switch key to cut off the power supply.
⑩Close the light detector cover and put it back in the box.
1.We accept PayPal only. Fastest and safest way for making a payment.
2.Please make the payment via PayPal within 7 Days From the end of the auction end.
3.Positive FB will be left after received your payment.
Shipping
1.Item will be shipped within 2-4 business days upon receipt of payment ,we can ship it from DHL. fedex ,Singapore Post.Hong Kong Post, china Post or many other delivery service,
please choose which delivery service do you need .
2.Please confirm your address after you bid the item.
Return Policy
1.We believe our items are so outstanding. We are convinced you will be happy with your Purchase.
2.If you do not satisfy with our items. Please simply return to us within 14 Days in original condition. Just pay for the returned postage.Then we can issue full refund to you after the returned item arrived
at our warehouse.
3.Please include your eBay ID and item number with any email requests. Feedback & Contact US
1.When you satisfied with our product and services please leave us positive feedback.
2.If a problem occurs, contact us immediately with any email request.
3.Just contact us using the " Ask the seller a question" link on eBay.
