(A) the online test:
Test circuit is shown in Figure 1. PT is being tested in phase of voltage transformers, MOV to be tested.

(B) the offline test:

Test circuit is shown in Figure 2. Wiring please take a 100 ω and 200 ω resistor string in MOA and the ground, to ensure that the test circuit connection.

Four steps:

1, according to figure 1 or Figure 2 connect the test circuits, power on the tester.

2, mobile cursor to ' variable than entered ' document entered variable than, variable ratio is refers to run voltage (or test voltage) and access test instrument voltage channel of voltage signal of than, for Figure 1 wiring for PT of variable than, for Figure 2 wiring, is is test transformer of variable than, please note: for some has measurement winding of test transformer,, if voltage signal received in measurement winding Shang, is entered test voltage and measurement winding voltage of variable than.

3, move the cursor to the ' voltage ', correspond to voltage signal on channel select Panel.

4, move the cursor to ' full scale ' or ' fine '. ' Full scale ' is used to make simple measurements and tests for about 4 seconds. ' Fine ' is used for more complete testing, testing for about 15 seconds.

Press the confirm key to see the interface as shown in Figure 4:

Figure 4 voltage test voltage value, can be updated in real time, through this document, users can observe whether the test voltage, upon confirmation, the tester begins testing and results.

' Full scale ' output the results as shown in Figure 5

I1 is the total current value
IP for the peak current
Ir1 resistive current fundamental RMS
Ir+ resistive current positive peak
Ir-resistive current negative peak
U1 voltage fundamental value

PW for the active power:

In Figure 5 is displayed, press confirm button you will enter the printing data interface, press the three keys to repeat the test. ' Fine ' mode is split-screen shows all currents, voltages, resistive current fundamental and 3, 5, 7 and valid values. Peak current, resistive current of positive, negative peak and active power operation press the confirmation button to enter the next screen, press the exit key to return to the previous screen.

View the waveform using:

After you enter the variable ratio and voltage channel, move the cursor to ' view the waveforms ' a file press the confirm key to view the waveform of the voltage and current waveform can be refreshed in real time, when the waveform is displayed, there are several buttons can be used to read the waveform data.

1, press the up arrow key to move forward display data point by point.
2, press the down key to backward point-by-point display data.
3, press up + confirm key to fast forward displaying data.
4, fast backward press down + confirm key to display the data.
5, press the confirm key to continue the waveform display.
6, press exit to return to the main menu.

Five considerations:

1, the instrument must be earthed reliably to ensure that equipment and personal safety.
2, power test, should be in the low-voltage side of the sample (ground), a counter or 100-150 ω ω series resistor (testers have been given) and in the counter, or resistance to get I x signal, or may even make instruments with high voltage, do not use high pressure directly into the instrument, and test the low pressure side of transformer must be reliably grounded.
3, when the test line, use a multimeter confirmed Ix introduced the instrument between the wires in the conduction State in order to prevent high voltage circuit open circuit.
4, before entering the measurement, enter the ratio multiplier and voltage connections.
5, online tests, should be taken with PT signal arrester to be measured the same as the voltage reference signal. This tester the two voltage signals end is equipped with a 100mA fuse only, when the wrong connection causes short circuit, the fuse will blow up to guarantee the role of PT or test transformer, so when the tester displays testing voltage wrong, confirm the input ratio and voltage channel is correct, check if the insurance is burnt out.