Guardian Multi-Channel Hipot Tester – 19020


Key Features

  • Datasheet
  • 10/4 channels in one design
  • 10 sets of sync output and measurement
  • AC/DC/IR 3 in 1 EST test
  • Master/Slave link – 10 units max.
  • Programmable V-output and limits
  • OSC (Open/Short Check)
  • Flashover detection
  • 1MΩ~50GΩ insulation resistance test
  • RS-232 / Handler / GPIB Standard
  • Large LCD panel
  • Panel lockup function
  • Easy operating interface
  • CE Mark
  • High Efficiency Hipot Test Solution
  • 2-Year factory warranty


The Hipot test is one of the most important test items in electrical safety testing. All electrical components and products including transformers, capacitors, power supplies, chargers and home appliances require hipot testing.

With more than 20 years experience in developing the instruments for test and measurement, Chroma created the Guardian 19020 multi-channel hipot tester with a brand new architecture. It can measure the hipot leakage current of all channels at the same time and conduct tests on up to 100 DUTs simultaneously.

The Guardian 19020 saves space on the production line by eliminating the need to purchase multiple Hipot testers. Its one-time multi-channel test can increase the efficiency of electrical regulatory testing. It improves productivity and reduces the risks of testing for products that require only hipot testing.

The Guardian 19020 also has powerful functions for Flashover detection and Open/Short Check. It contains several international patents and is the best tool for regulatory electrical hipot testing.

World’s First Sync Hipot Test (Patent Registered)

The Guardian 19020 comes equipped with the world’s first sync hipot test function. A single unit can operate 10 channels with synchronized output and measurements simultaneously. Up to 10 units (master & slave) can be controlled simultaneously to have 100 channels in total. These can be grouped for output to avoid creating voltage differences due to adjacent tests as well as to improve productivity.

Synchronous Hi-Pot Test

One issue frequently encountered when testing multiple DUTs for Hipot is the lack of ability to synchronize the voltage output. When planning for a production line or automation, minimizing facilities and optimizing space are often utilized in the plant. This results in the distance between two DUTs being quite small. For example, using an output voltage of 5kVac, if the output of the Hipot tester is not synchronized, the two DUTs may create a discharge of high voltage difference (up to14kV peak-peak) and cause the fixture to be damaged, creating erroneous test results. The Chroma 19020 synchronizes the output signal preventing high voltage differences on the adjacent two ends. This not only extends the life of production equipment but can also reduce the occurrence of judgment errors.

Flashover Detection

As with other Chroma EST Series scanners, the 19020 has a Flashover detection function. Flashover is the electrical discharge generated by a high electrical field inside or on the surface of insulation material that causes the DUT to lose its insulation characteristics and form a transient or discontinuous discharge. It can cause a carbonized conductive path within the insulation, or even damage the product under test. Flashover cannot be detected by only monitoring leakage current. The change rates of test voltage or leakage current are monitored to detect flashover as its detection is one of the most indispensable test items for electrical safety testing.

Open / Short Check (OSC)

The OSC function checks for any Open (bad connection) or Short (DUT short circuited) errors occurred during a test. If a DUT has an open circuit during a test, the unit might be misjudged as being good. If a DUT has short circuit, the OSC function can filter it out to diminish the damage to the fixture and save testing costs. In general, products under Hi-pot test have capacitance (CX). CX could be tens of pF to several µF under normal operating conditions. When the circuit connection is interrupted, a small capacitance will be formed on the broken interface that is usually lower than 10pF. This makes the entire capacitance of the product lower than its normal value. The capacitance of a product may be higher than normal when the product is short-circuited or near short circuit. Thus the high/low limit of capacitance variation can be used to identify the short circuit problem.


Chroma 19020 can be used to test a variety of electrical parts and products. The multi-channel Hipot tester can test multiple DUTs at once. Some applications include:

  • Automation of power cord and related cable material
  • Automation of capacitor and resistance
  • Insulation test of switch and connector
  • One time test for transformer with multiple pins or multiple units
  • Production planning for charger and adapter

With 190201 3-CH scanner (optional), the 19020 can complete 3 Hipot tests at once.
Using a two winding transformer as an example, the following three Hipot tests can be done at once within a single DUT loading time.

  1. Primary to Secondary Hipot test.
  2. Primary to Core Hipot test
  3. Secondary to Core Hipot test.

This application can be applied to transformers, power adapters, common mode chokes and more.
For many test solutions, Chroma has accessories and fixtures available for use. Please contact us for further information.

Model Description
19020 Multi-channel Hipot Tester (AC5kV/10mA, DC6kV/5mA, 10ch)
19020-4 Multi-channel Hipot Tester (AC5kV/10mA, DC6kV/5mA, 4ch)
19021 Multi-channel Hipot Tester (AC6kV/8mA, 10ch)
19022 Multi-channel Hipot Tester (DC8kV/3.5mA, 10ch)
19022-4 Multi-channel Hipot Tester (DC8kV/3.5mA, 4ch)
19023-8-20 Multi-channel Hipot Tester (AC8kV/20mA, 4ch)
A190200 19″ Rack mounting Kit for 19020
A190201 3-CH Scanner for 19020
A190202 3 Way Scanning Box (4 channel)

User Manuals

Manuals - 19020 Multi-Channel Hipot Tester

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User Manuals for 19020 Multi-Channel hipot Tester. Available documents are: Quick Start Guide Hardware User Manual All files in PDF format. ...

Product Brochures

Battery Test Solutions

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Brochure outlining Chroma battery testing solutions. Chroma satisfies battery test requirements such as charge rate, discharge rate, state of charge (SOC), and state of health (SOH), and depth of discharge...

Application Notes

Open Short Check Function of Chroma Safety Analyzers

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What's Changing In Appliance Hipot Testing And Why

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This application note provides information on changes in appliance hipot testing procedures. ...

Using Low Limits To Verify Hipot Connection

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This application note illustrates how to use low limits to verify hipot connection to the device being tested. ...

UL Standard

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This application note provides an overview of UL standards. ...

Using A Load Box To Verify A Hipot Tester Is Working

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How do you know if your hipot tester is functioning properly? Are you getting false failures or worse, false pass results? This application note demonstrates how to use a load box to verify that your hipot...

Testing Filter Capacitors On Medical Devices

One time registration required in order to download documents. Register or login to continue. 534 236 downloads

This application note will show how the hipot tester can be used not just as a means to check the DC Leakage Current or the Insulation Resistance, but can also be used to verify the existence and the value...

Resistive Load Boxes For Hipot

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This application note provides information on high voltage resistive load boxes and the manufacturers that make them. ...

Light Ballast Application

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This note describes how to perform hipot tests on a light ballast. ...

Hipot Testing Of Motors And Safety Standard Compliance

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This application note describes the regulatory standards and tests that are applicable to hipot testing of motors. ...


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    Lead time

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    Select required tests:
    AC HipotAC/DC HipotGround Bond (GB)Leakage Current (LC)Insulation Resistance (IR)Corona Discharge (CD)Impulse Winding Test (IWT)

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