How to Measure Frequency Using a Digital Multimeter
For UPS power supply. The stability of the voltage at its output is an important parameter, as is the frequency of its output. However, it cannot be directly measured with the frequency block of the digital multimeter, because the voltage that the frequency block can withstand is very low. Only a few volts. At this time, a 220V/6V or 220V/4V step-down transformer can be connected to the output end of the UPS power supply to reduce the voltage without changing the frequency of the power supply, and then connect the frequency block to the output of the transformer to measure the UPS power supply Frequency of.
