There are two main measurement parameters: one is open circuit voltage and the other is short circuit current.
1. The open circuit voltage measurement method is to place the battery panel under direct sunlight without load and use a multimeter to measure the output voltage in the DC voltage range.
2. Short circuit current measurement method, use the direct current setting of a multimeter to directly measure the output terminal. The gear selection is wider.
Detailed information:
1. Before using the multimeter, you must first perform a “mechanical zero adjustment”. That is, when no electricity is measured, the multimeter pointer points to the zero voltage or zero current position.
2. When using the multimeter, nDo not touch the metal part of the test lead with your hands. This can guarantee measurement accuracy on the one hand and personal safety on the other hand.
3. When you measure a certain amount of electricity, you cannot change speed during measurement, especially when measuring high voltage or large current, you need to pay more attention. Otherwise, the multimeter will be damaged. If you need to change gears, you must first disconnect the test leads and then measure after changing gears.
4. When using the multimeter, it should be placed horizontally to avoid errors. At the same time, care should also be taken to avoid the influence of external magnetic fields on the multimeter.
The multimeter detects the solar sensor using the resistance value and uses the resistance level to detect the two leads of the multimeter.
1. Turn it onmultimeter and adjust it to the resistance level.
2. Use a multimeter to measure the two wires of the water level sensor coil to measure the solar sensor.
3. Simply measure the resistance of the temperature and water level sensor wire.