1、 Working principle

AC/DC programmable voltage withstand insulation tester is a programmable testing instrument that integrates voltage withstand testing and insulation resistance testing. It is suitable for electrical safety performance testing of electronic components, electrical equipment, sensors, cables and other products.

1. Principle of voltage withstand test

Apply a high voltage (maximum) to the object under test at the set DC or AC voltage10kV）By detecting whether the leakage current flowing through the tested object exceeds the preset upper limit, the insulation strength is judged to be qualified.

If the leakage current exceeds the set value, it is judged as poor withstand voltage, and there may be insulation breakdown or leakage risk.

2. Principle of Insulation Resistance Testing

At the set DC voltage (such as500V）Apply a stable voltage and measure the insulation resistance value at both ends of the tested object.

If the measured resistance value is lower than the set lower limit (such as10MΩ), it is judged as poor insulation, indicating that there are defects or moisture issues in the insulation material.

3. Core functional features

AC/DC optional: SupportsAC/DCTwo testing modes.

Programmable operation: Input parameters through various methods such as knobs, buttons, and numeric keys.

Security protection: It has functions such as overcurrent, overvoltage, and time protection, and there is a warning light to remind when starting from high voltage.

Rich communication interfaces: supportRS232TheRS485andPLCOnline, suitable for automated testing systems.

2、 Operation steps (taking testing a sensor as an example)

step1: Wiring

1. Connect the high-voltage output terminal to a metal test point of the sensor.

2. Connect the loop end to another metal testing point of the sensor.

3. Ensure reliable grounding of the grounding terminal.

step2: Enter the settings interface

1. pressSetupPress the key to enter the parameter setting interface.

2. Use rotary encoders, navigation keys, or numeric keys for parameter input.

step3Set voltage withstand test parameters

Test mode:DC(DC)

Test voltage:220V

Testing time:10S

Voltage rise time:6S

Current upper limit:1mA

step4Set insulation test parameters (optional)

1. pressF1Key to create a new test item.

2. Change the mode toIR(Insulation resistance test).

3. Set the following parameters:

Test voltage:500V

Testing time:5S

Lower limit of insulation resistance:10MΩ

step5: Start testing

1. returnTestMeasurement interface.

2. Press the green start button, and the instrument will start testing.

3. The high voltage warning light is on, indicating that the test is in progress.

step6: View Results

After the test is completed, the results will be displayed directly on the screen.

Qualified: DisplayTest qualified "indicator light.

Unqualified: DisplayTest failure "indicator light, and the specific reason for failure (such as overcurrent, low resistance, etc.) can be viewed.

3、 Instrument interface and auxiliary functions

front panel

System settings key, start key, reset key, power switch

High voltage output interfaceUDisk interface (for importing)/Export parameters)

Status indicator light: high voltage warning, test qualified/bad

Input methods: rotary encoder, navigation keys, numeric keys

rear panel

USBInterface: Used for firmware upgrade

Power input: Supports110V/220Vswitch

Communication interface:RS232TheRS485, supportPLConline

Grounding terminal: Ensure safe grounding of the instrument