Operation and Use of Digital Dual-Clamp Phase Volt-Ampere Meter
Press the ON-OFF button and rotate the function range switch to correctly select the test parameters and range.
Measure AC voltage
Set the function range switch to the 500V range corresponding to parameter U1, and input the measured voltage through the U1 jack to start the measurement. If the measured value is less than 200V, you can directly rotate the switch to the 200V range corresponding to U1 for measurement to improve the measurement accuracy.
The two channels have exactly the same voltage test characteristics, so the switch can also be set to the range corresponding to parameter U2, and the measured voltage can be input from the U2 jack for measurement.
2. Measuring Alternating Current
Turn the rotary switch to the 10A range corresponding to parameter I1, insert the plug of the secondary lead of the clamp-on current transformer labeled I1 into the I1 socket, and clamp the jaws around the line to be measured to start the measurement. Similarly, if the measured value is less than 2A, you can directly rotate the switch to the 2A range corresponding to I1 for measurement to improve the measurement accuracy.
When measuring current, you can also turn the rotary switch to the range corresponding to parameter I2, and insert the measuring clamp marked I2 into the I2 socket. Then, clamp the jaws of the clamp onto the circuit under test for measurement.
3. Measuring the phase angle between two voltages with a digital dual-clamp phase volt-ampere meter
When measuring the phase angle by which U2 lags behind U1, switch the switch to the parameter U1U2. During the measurement process, you can rotate the switch clockwise to each range of parameter U1 at any time to measure the input voltage of U1, or rotate the switch counterclockwise to each range of parameter U2 to measure the input voltage of U2.
Note: During phase measurement, the symbols U1 and U2 beside the voltage input jack and the red ” * ” symbol on the clamp-on current transformer are the terminals of the same phase.
4. Measuring the phase angle between two currents with a digital dual-clamp phase volt-ampere meter
When measuring the phase angle by which I2 lags behind I1, switch the switch to the parameter I1I2. During the same measurement process, you can rotate the switch clockwise to each limit of parameter I1 at any time to measure the input current of I1, or rotate the switch counterclockwise to each limit of parameter I2 to measure the input current of I2.
5. Measure the phase angle between voltage and current
Input voltage from U1 and use the I2 measurement clamp to input current from I2. Rotate the switch to the U1I2 position to measure the angle by which the current lags behind the voltage. During the test, you can rotate the switch clockwise to the I2 range to measure the current at any time, or rotate it counterclockwise to the U1 range to measure the voltage.
The voltage can also be input from U2, and the current from I1 can be input using the I1 measurement clamp. Rotate the switch to the I1U2 position to measure the angle by which the voltage lags behind the current. During the measurement process, the switch can be rotated at any time to measure the values of I1 or U2.
6. Phase sequence discrimination in three-phase three-wire distribution systems
Set the rotary switch to the U1U2 position. Connect phase A of the three-phase three-wire system to the U1 socket, phase B to the ± sockets corresponding to U1 and U2 simultaneously, and phase C to the U2 socket. If the phase angle measured at this time is approximately 300°, the system under test is in positive phase sequence; if the measured phase angle is approximately 60°, the system under test is in negative phase sequence.
Change the measurement method. Connect phase A to the U1 socket, phase B to the ± sockets corresponding to U1 and the U2 socket simultaneously, and phase C to the ± sockets corresponding to U2. If the measured phase value is 120° at this time, it is a positive phase sequence; if the measured phase value is 240°, it is a negative phase sequence.
7. Phase sequence discrimination in three-phase four-wire system
Set the rotary switch to the U1U2 position. Connect phase A to the U1 socket, phase B to the U2 socket, and the neutral wire to the ± sockets of both input circuits simultaneously. If the phase angle displayed is around 120°, it indicates a positive phase sequence; if it is around 240°, it indicates a negative phase sequence.
8. Inductive and Capacitive Load Discrimination
Set the rotary switch to the U1I2 position. Connect the load voltage to the U1 input terminal, and the load current through the measuring clamp to the I2 jack. If the phase angle is displayed within the range of 0° to 90°, the tested load is inductive; if the phase angle is displayed within the range of 270° to 360°, the tested load is capacitive.
Post time: Mar-20-2026