Ultra low frequency output wiring method

Figure 3 wiring diagram

Wiring instructions: connect the control output special line, high voltage output special line and grounding wire equipped with the product according to the method shown in Figure 3. The power cord of the power socket is connected to the AC of 220V / 50Hz.

1.   Operation procedure

(1)   startup, shutdown and reset

After connecting all the lines according to the above method, the power switch can be turned on. After the microcomputer is powered on or reset, the instrument will automatically enter the interface as shown in Figure 4. When connecting wires, removing wires, or temporarily not using the instrument, turn off the power supply. The power socket is equipped with a safety tube. If there is no display on the start- up screen, check whether the fuse is broken first, and the size of the fuse shall be replaced according to the data provided in Table 3.

Figure 4 Schematic diagram of touch screen

(2)   Set parameters

Figure 5 parameter setting interface

First, click the "setting" button on the screen of Figure 4 to display the setting parameter interface shown in Figure 5. In Figure 5, the output frequency, test time, test voltage, overcurrent protection value and overvoltage protection value on the high voltage side can be set according to the needs of the test. The modification method is as follows:

★ There are three options for frequency: 0.1, 0.05 and 0.02, and the unit is Hz.

★ Timing modification range: 0-99 points. It specifies the duration of the test, in minutes.

★ Set voltage: range from 0 to rated value, unit: kv. It sets the test voltage we want to raise. When the instrument rises to this set voltage limit, it will no longer boost voltage, and maintain constant amplitude sine wave output at this peak value.

★ Set voltage limit: the setting range of voltage protection value is from 0 to rated value, and the unit is kv. It specifies the upper limit value of the voltage passing the test object. When the voltage exceeds this setting, the instrument will automatically cut off the output.

★ Setting current limit: the setting range of current protection value is from 0 to rated value, and the unit is ma. It specifies the upper limit value of current passing through the test object. When the current exceeds this setting, the instrument will automatically cut off the output.

(Note: the above voltage, current and measurement data displayed by the instrument are all peak values.)

(3)   automatic boosting

After pressing the "start" key in Figure 4, the instrument will carry out the boosting test under the control of the computer as follows:

Self-inspection → boosting → constant amplitude output → shutdown