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ultrasonic principle and the transient ground pressure (TEV) principle, and the
ultrasonic sensor and TEV sensor built in the ZXPD-200L are used to measure
the partial discharge of the high voltage switchgear The position of the front end,
the part needs to be close to (ultrasonic measurement) or close to (TEV
measurement) high-voltage switchgear during the test. Note that close to and
close to are different, depending on which principle is used to test the
switchgear.
Host built-in sensor
Ultrasonic measurement
If you choose the built-in ultrasonic sensor to measure the partial discharge of
the switchgear, you do not need to do other operations or settings after turning
on, because the ZXPD-200L selects the built-in ultrasonic sensor by default after
booting, and the upper left of the screen will show which sensor is currently
connected. As shown in the figure below, this state is the ultrasonic
measurement mode
Sensor status information
In the ultrasonic measurement mode, the measured data is dBuV, because
dBuV is a logarithmic function value based on 1uV. Therefore, the measured