3A 30V 90W Variable DC Power Supply

Adjustable 0-3A, 0-30V output DC variable power supply is a single output, high precision and high reliability, 4 LED digital display with accuracy of +/-0.5%. Compact and light weight design, easy to move and operate, suitable for the laboratory, electronic, communication equipment maintenance, products line, scientific research and teaching units.

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Tips

DC power supply is the most commonly used basic instrument in the field of laboratory and maintenance. The regulated power supply provides a reliable power supply for electrical appliances and circuits. In maintenance, it is often used to reduce the fault range by replacing the power supply unit of the electric appliance itself, at the same time, it uses the regulated power supply to monitor the working current of the electric equipment and compares it with the normal value. It is very helpful for the judgment of the circuit fault to find the circuit short circuit, open circuit and other abnormal faults in time.

For example, for a hand-held walkie-talkie that cannot be turned on, the first step of general maintenance is to remove the battery of the walkie-talkie, power the walkie-talkie through the maintenance power supply, and then watch the current change of the walkie-talkie. If the walkie-talkie can be started up normally, the problem of battery pack power supply and contact point shall be emphatically suspected. If the walkie talkie does not respond to start-up and there is no current in the circuit, then the problem of the internal power supply circuit of the walkie-talkie shall be suspected first, such as whether the internal fuse is burnt, etc., and then the switch and voltage stabilizing circuit shall be checked in sequence. In the absence of a power meter, the experienced HAM can roughly judge the output power level and whether the RF power amplifier circuit works normally by the current consumed by the walkie-talkie during transmission.