1、 Product Overview

This instrument is from our companyThe testing equipment designed according to the latest national industry testing standards is safe, reliable, powerful, easy to use, and easy to maintain,This product is suitable for testing the safety withstand voltage and leakage current of various motors, appliances, instruments, household appliances, as well as high-voltage systems,To assessSubject matterDetermine the insulation level, identify insulation defects in the test sample, and measure themThe test sample is resistant toVoltage capabilityIt is in line withGB4706.1General Requirements for Safety of Household and Similar Electrical AppliancesGB9706.1General Requirements for Medical Electrical SafetyGB4943、GB4793The testing equipment required for the testing requirements of relevant clauses in national standards.

2、 Execution standards

3、 Performance characteristics

1Using high brightness digital display, the viewing angle is wide, the display is clear, and easy to read.

2Can display the leakage current and voltage values on the tested item during testing.

3It has time preset and display, and the timing method is countdown. When the test exceeds the time limit, the instrument will automatically turn off the output voltage to interrupt the test.

4The alarm current value can be preset arbitrarily. When the leakage current exceeds the preset alarm current value, the instrument will sound and light an alarm to remind the user to record the test results.

5The output waveform is50HzSine wave.

6All key components are imported to ensure high precision and long lifespan of the instrument.

7Adopting an integrated chassis, it has a beautiful appearance, small size, light weight, and is easy to carry.

4、 Technical parameters

5、 Structure and working principle

1Working principle

This tester consists of a high-voltage boost circuit (which can adjust the required test voltage output), a leakage current detection circuit (which can set the alarm current), and an indication instrument (which can directly read the output voltage and leakage current values)<Or breakdown alarm current value>）Composition, see figure2In the test, when the tested object reaches the specified time under the specified test voltage, the instrument automatically cuts off the output voltage. Once breakdown occurs, that is, the leakage current exceeds the set alarm current, and an audible and visual alarm will be issued.

2Layout of instrument function keys

6、 Usage and Operation

1Preparation before use

① Connect the power supply and place the "power" switch in the "on" position. At this point, the digital display for output voltage, leakage current, and time, as well as the indicator symbols for each "test unit", should light up.

② Rotate the "voltage adjustment" knob counterclockwise until all readings are zero, indicating that the instrument is in its initial state.

2Function key description and settings

① Alarm current setting

Select the alarm current range according to the required alarm current value, press and holdLeakage current test/Press the "preset" button to adjust the leakage current preset potentiometer. At the same time, observe that the displayed value in the leakage current display window reaches the desired alarm value. Stop adjusting the leakage current preset potentiometer and then release the "leakage current" button

Flow Testing/If the "preset" button is pressed, the leakage current setting is complete.

② Timed setting

placeThe 'timer' button is in the 'on' position.

Note: WhenIf the "timer" button is in the "off" position, the timer is set to "∞".

According to the required testing time, toggleWhen the value on the "timer" dial is reached and the displayed value in the test time window reaches the desired test time value, stop turning the timer preset dial to complete the timer setting.

③ Output voltage setting

clickPress the "Start" button and turn the "Voltage Adjustment" knob clockwise according to the required test voltage. At the same time, observe that the displayed value in the output voltage window reaches the desired voltage value. Stop turning the voltage adjustment knob and keep the "Voltage Adjustment" knob position unchanged. Press the "Reset" button to complete the test voltage setting.

Note: In the future testing process, if the test voltage is not changed, only press once for each testJust press the 'Start' button. If the test voltage needs to be changed, repeat the above steps, and the output voltage value will be directly read from the instrument's "voltage" display window.

3Operation steps

① When determining the output voltage indication of the instrument“0”In the "off" state of the test light, insert one end of the high-voltage test line (red) into the "AC high voltage" output terminal of the instrument, and connect the other end to the power input terminal or other live parts of the tested object. Insert one end of the other test grounding wire (black) into the grounding terminal of the instrument and lock it, and connect the other end to the grounding terminal of the tested object's shell (metal) or power input terminal (if the tested object is connected to the ground or ground wire, the instrument grounding terminal must be connected to it).

② Press the "Start" button, the "Test" indicator light will turn on, the voltage reading will be the current test voltage value, and the leakage current reading will be the current leakage current value on the tested object. If the tested object is a qualified product, there will be no sound of light alarm when the test time is up, and the instrument will automatically cut off the output voltage; If the tested object fails the test within the test time, the "alarm" light will turn on, the buzzer will sound an alarm, and the instrument will automatically cut off the output voltage. The "reset" button can be pressed to eliminate the alarm.

③ Perform a voltage withstand test using a wire controlled terminal (the "start" and "reset" buttons on the panel fail) and place the "timer" button in the "off" position.

a.When using wire control testing, insert one end of the black grounding wire into the instrument grounding terminal, clamp the grounding terminal of the tested object with the other end, insert the wire control plug of the rod into the instrument wire control socket, insert the high-voltage plug of the rod into the "high-voltage" output terminal, and then contact the pin of the test rod with the live part of the tested object. Press the button on the test rod to "start", and release this button to "reset".

b.Definition of wire control interface pins

When wiring by oneself, when controlling the line 4、5 Foot closed, instrument "started";1、2 Close the foot and reset the instrument. (Note: The length of the wire control lead cannot exceed)2mThe control signal is a passive contact

Attention: The wire control test stick is optional and comes standard without wire control.

7、 Common faults and troubleshooting methods

1There is no power indicator when starting up, and the monitor does not light up

① Please check if the power supply is normal. If it is not normal, please check if there is220VAnd whether it is within the normal range of use of the instrument.

② Please check if the fuse is damaged. If the fuse is damaged, please replace it with a fuse of the same model.

③ Please check if the power transformer has output. If there is no output, please replace the power transformer.

④ Please check the voltage regulatorLM7812Is it damaged? If it is damaged, please replace itLM7812.

2Power on alarm

① Please check if the sampling resistor on the leakage current switch board is damaged. If it is damaged, please replace it with the corresponding sampling resistor.

② Please checkLM324Is there any damage? If it is already damaged, please replace itLM324.

3Upon startup, there is a voltage indicator

① Please check if the thyristor is damaged. If it is already damaged, please replace it with a thyristor of the same specification.

② Please checkMOC3061Is it damaged? If it is already damaged, please replace itMOC3061.

4At startup, it is in testing mode

① Please checkNE556Is it damaged? If it is damaged, please replace itNE556.

② Please check if the start button is damaged. If it is already damaged, please replace the start button.

5Instrument startup, reset failure

① Please checkNE556Is it damaged? If it is damaged, please replace itNE556.

② Please check if the start and reset buttons are damaged. If they are already damaged, please replace themReset button.

6After pressing the start button to turn on the device, the measurement light will turn on, but there will be no voltage indication

① Please check if the high-voltage transformer is damaged. If it is already damaged, please replace the high-voltage transformer.

② Please check if the voltmeter is damaged. If it is already damaged, please replace the voltmeter.

7Leakage current without indication

① Please check220Ω/6WIs the resistor damaged? If it is damaged, please replace it220Ω/6WResistance.

② Please checkLM324Is it damaged? If it is already damaged, please replace itLM324.