10 Tips for Designing with a high voltage tester

In the world of test systems, a reliable and accurate ac dc hipot testeris very important because it gives clean power to the Device under Test (DUT), ensuring the results are accurate and eliminating any doubts. To get the most out of your power supply, you must know its features and how to use them well.

This blog gives you tips on how to get the most out of your power supply and choose the right one when you need to :

Ensure Regulation

If a power supply cannot control the voltage or current going out, it goes into an unregulated (UNR) mode. This can happen if there are problems inside the power supply, if the AC input voltage is too low, if the load resistance changes from the constant voltage (CV) to constant current (CC), if the power supply is connected in parallel with another power source, or when switching between CV and CC modes.

Use Remote Sensing

You can use remote sensing to compensate for voltage drops caused by lead resistance. Use a shielded twisted-pair cable for sense leads. Connect the shield to the ground at only one end. Don’t twist or bundle sense leads with load leads. Prevent an open circuit at the sense terminals. Set the power supply to remote sense mode or four-wire mode if necessary.

Measure DUT Current

Your ac high voltage tester’s current can be measured with an ammeter, an external current shunt with a digital multimeter (DMM), or the power supply’s built-in current readback feature. Each method has pros and cons, but the built-in readout on the power supply is often accurate and easy to use.

Connect Outputs in Parallel or Series

You can get more voltage if you connect the outputs of two power supplies in series. Follow safety precautions like not going over the floating voltage rating, connecting outputs with the same rating, and setting each output separately to get the voltage or current you want.

Choose a Power Supply with Low Noise

Choose a power supply with low noise specs to keep noise to a minimum. Linearly regulated power supplies are better at dealing with noise than switching-regulated ones. In addition, use shielded two-wire cables to make connections and connect the shield to the ground at only one end.

Utilize Built-in Protection Features

Most power supplies have safety features like overvoltage protection (OVP) and overcurrent protection (OCP). Set the OVP value to protect your DUT from too much voltage, and set up the OCP to limit the amount of current that flows from the output. Learn about these parts of your DUT to keep it safe during testing.

Use output relays to disconnect completely

Power supply outputs that are “off” may still have some impedance, which can affect your DUT. Some power supply models have internal output relays that disconnect the output from the DUT to ensure no current flows. For precise disconnecting, you should use these relays.

Capture Dynamic Waveforms with Built-in Digitizer

Some power supplies have a built-in digitizer, which lets you record the output’s changing voltage and current waveforms. This feature lets you look at your DUT’s behavior in more detail.

Create Time-Varying Voltages with List Mode

In list mode, you can make voltage sequences that change over time and sync them to internal or external signals without using a computer. To do voltage sequence or waveform tests, you can program voltage steps, their durations, and the number of times they will be run.

By following these tips, you can get the most out of Ac high voltage testerand get testing results that are accurate and reliable.