Guardian Multi-Channel Hipot Tester – 19020
- 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
- Standard RS-232 / Handler interface
- Optional GPIB interface
- 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.
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.
- Primary to Secondary Hipot test.
- Primary to Core Hipot test
- 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.
|Guardian 19020||Multi-Channel Hipot Tester|
|Guardian 19020-4||Multi-Channel Hipot Tester (4CH)|
|19021||Multi-Channel Hipot Tester (AC)|
|19022-4||Multi-Channel Hipot Tester (DC/IR/4CH)|
|19022||Multi-Channel Hipot Tester (DC/IR)|
|A190200||19″ Rack mounting Kit for 19020|
|A190201||3-CH Scanner for 19020|
|A190202||3 Way Scanning Box (4 channel)|
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