For example, solar modules can be measured much outside the solar system collection. In this case, the sun itself will be the only practical test available light. For almost impossible to carry a set of solar simulator in the open without a complete test system turnkey, so this test requires the use made by the standard test equipment to improve some of the test solutions to bring implemented. Dell Vostro 1420 Screen Dell Vostro 1500 Screen
Outdoor test Another factor to consider is temperature. Because the battery performance will be affected by temperature, hence the need to monitor the temperature of the test. Battery performance depends not only on temperature and performance of test equipment is also dependent on temperature.
Many hardware vendors did not disclose their test equipment at room temperature in a very narrow range (eg 25 ℃ ± 5 ℃) until the performance. Other vendors will provide a specification temperature coefficient, can adjust the precision of the standard test equipment to work in their designated work to the outside temperature must be corrected.
Applicable to the increase in power load test
For high power applications, the electronic charge standard can be used to test solar cells. Many engineers do not believe that the use of electronic charge to test solar cells, because they are accustomed to using a turnkey system or power to all four quadrants. Dell Vostro 1510 Screen Dell Vostro 1520 Screen
In view of the solar cell will produce energy, power usage for the four quadrants test, the power models of actual work: solar cell terminals in the power of a positive voltage is applied. Meanwhile, the current quadrant solar cells provide power to the terminal, which means that the power to all four quadrants to show the reverse current (in terms of terminal). Under these conditions, can also be called four-quadrant power is “power Shen.
From electrical point of view, a positive voltage across Canada and a current flow (eg, the reverse current) of the instrument known as the electronic charge. Therefore, for most of the bright light and solar energy production of solar cells is tested, the four-quadrant power electronic loads in fact play a role.
The advantage of using the electronic load that the load can be used in a variety of courses and levels of power. The use of rating 50W or hundreds of thousands of watts and amps in the electronic charge, you can easily overcome the power four quadrant 3A, 20W limit. Dell Vostro 1536 Screen Dell Vostro 1537 Screen
Electronic load in constant voltage mode, also known as the CV mode. In the CV mode, the load can be adjusted by the current flowing through its own, and adjust the voltage to maintain constant tension. Therefore, CV can be used to create the voltage scan mode, use the load to control the output voltage of solar cells, and measuring the current generated.
Some of the load (such as Agilent N3300 Series) can quickly locate the implementation of a series of points to scan resume mode output voltage CV, which represents the IV curve quickly. Meanwhile, the burden of the solar cells can flow to the load current waveform of a digital oscilloscope curve is similar to the capture.
Draw control by scanning the CV of the voltage on the current wave of digital graphics, you can create the IV curve. And because it is obtained by rapid scanning, so the test can be completed in about one second when the battery is not yet a major source of light and heat and temperature changes occur. hp pavilion zv5000 battery hp pavilion zv6000 battery
However, many electronic loads are low voltage limits must load applied between the positive and negative input of the minimum operating voltage. Common charge minimum input voltage is 2 ~ e 3V. To circumvent this limitation, a DC power supply for the load series. The bias current is called power, because it provides a bias voltage of the load.
Generally, the power of polarization is set at 3V, ensure that still meet the minimum requirements of the charging voltage. DC voltage source has no effect on the solar cell, which is a floating voltage device; DC source only increase the tension of the solar cell 3V. hp pavilion dv9000 battery hp pavilion zd7000 battery