Hybrid Wound Component EST Scanner – 19035

Hybrid 19035 Wound Component EST Scanner

Key Features

  • Datasheet
  • 5KVAC & 6KV DC Hipot Test
  • 1mΩ~50GΩ /5kV IR Test
  • 10mΩ~100kΩ DCR Test
  • 8 Channel Scanner
  • Supports 16CH scan box (19035 only)
  • High Speed Contact Check (HSCC)
  • SUB-STEP Function
  • Open / Short Check (OSC)
  • GFI Human Protection
  • Flashover Detection
  • Key Lock Function
  • RS232 Interface (standard*1)
  • GPIB & HANDLER (optional)
  • Friendly Interface
  • CE mark
  • 2-Year factory warranty


The quality verification test items for Wound Components primarily are AC/DC Hipot tests and Insulation Resistance (IR) tests. The Chroma 19035 Wound Component EST Scanner Series perform these and other safety tests for motors, transformers, and heater related wound products. These scanners make for reliable quality control and efficient product control when implemented for quality verification by wound component manufacturers.

The Chroma 19035 Series supports 5kVac/6kVdc high voltage output to conform with withstand voltage test requirements for wound components, and has a maximum output current up to 30mA. The Insulation Resistance (IR) test measurement ranges from 1MΩ to 50GΩ, and voltage output can be up to 5kV; while the DCR test can measure the resistance parameters of wound components and test circuit connections (contact check) before the withstand voltage test is performed.

The 19035 Series also has powerful functions for Flashover detection and Open/Short Check (OSC), as well as programmable voltage and time parameters for various characteristics of DUTs for increased testing reliability and product quality.


Measurement Technologies

Flashover Detection

Wound Component Leakage CurrentThe Chroma 19035 has the same Flashover detection as other Chroma EST testers. Flashover is the electrical discharge generated by high electrical fields inside or on the surface of insulation materials that cause the DUT to lose its insulation characteristics and form a transient or discontinuous discharge. It can cause a carbonized conductive path, or damage the product under test. Flashover cannot be detected by monitoring leakage current only. The change rates of test voltage and leakage current must be monitored in order to detect flashover, as its detection is one of the most indispensable test items for electrical safety testing.

Ground Fault Interrupt (GFI)

Wound Component GFI HipotThe requirements for test environments indicates that test equipment is to be equipped with an auto interrupt device, so Chroma built in a Ground Fault Interrupt (GFI) function. When the current meter A1 and A2 detect a difference (i2-i1 = iH ) between the value i1 and actual i2 test current over high, this device can cut the power transiently for protecting against electrical shock to the operator. It is not only according to safety standards but also provides additional safeguards for test personnel.

Open/Short Check OSC

Wound Component Open Short CheckThe O.S.C. function is used to verify whether the connection is an open connection or that a short circuit exists between an instrument and DUT (device under test) before the Electrical Safety Test is performed. If there is a bad connection between the instrument and DUT, for instance a bad lead or relay oxidation, the test will also PASS. In some cases, the DUT has a short before testing. In this case, testing can lead to a broken test instrument due to the high load current. Therefore, our test devices check for open and short circuit conditions to ensure effective testing and protect instruments. Generally, the DUT have capacitive loads (Cx) from tens to thousands pF. If the connection is open, a capacitance will appear and then total capacitive load is lower then that in normal condition. If the connection is shorting, total capacitive load is higher then that in normal condition. Therefore, we can measure the value of capacitive load to check whether the contact is good or not.

High Speed Contact Check (HSCC)

HSCC mode is a new measurement technology for contact checks. It scans the circuit contact with multiple test points in a very short period of time. With this new feature, contact checks can be performed quickly prior to the Hipot test.

DCR Measurement 2W/4W

Wound Component DCR MeasurementDCR measurement for two-wire/four-wire is one of the standard test items. The two-wire measurement is suitable for major DCR, whereas the four-wire measurement is suitable for minor DCR since it is more accurate.

Temp Compensation

Problems caused by temp differences will usually occur while measuring minor DCR values, when the temp difference and the measured resistance value will be different. With the Temp Compensation function that has been added to the 19035, the DCR is converted to the measured value under standard temp via temp coefficient conversion. Thus, the measured difference generated by temp difference is reduced.

DCR Balance

Checking DCR balance of motor windings is just as important as checking inductance balance of the windings. When the EMF drive of different windings are not matched the rotational torque force will be unbalanced causing additional shaft wobble, vibration and bearing wear which affects long term life of the motor. The DCR Balance calculates the difference between the max and min DCR of the windings and compares that value to an acceptable programmable level, which in turn gives a PASS/FAIL output result for DCR balance. The DCR Balance Test is an auxiliary test tool for motors which helps establish long-term reliability of motors.

Contact Check

DCR tests not only measures the resistance of the winding, but also checks the connections before the Hipot test. The Chroma Hybrid 19035 can perform DCR measurements on windings to check for external contact, and for capacitance lower than 20 pF between the test points in wound components.

Model Description
Hybrid 19035 Wound Component EST Scanner
A190343 19″ Rack Mount Kit
A190347 GPIB/Handler/Temp Interface
A190348 RS232 Interface #2
A190351 8CH-16CH Scan Box
A190359 16CH HV Scan Box
A190358 Handler Indicator
A190512 Auto Control TR. Scan Box

The 19035 Series is a comprehensive safety tester designed for motor, transformer, and heat related wound component tests. Most wound components have multiple windings, such as 3-phase motors and dual winding transformers. With 8-channel scanning ability the 19035 can measure multiple test points in one test instead of switching test points manually. This reduces test time and labor cost immensely.

The built in OSC and DCR functions verify poor contact or short circuits that occur during testing, and solves the contact problems with wound components improving test quality and prolonging test equipment life spans.

  • Motor, Fan: Hybrid 19035-m
  • Electric Heater Tube: 19035-m
  • Transformer: 19035/19035
  • Switch, Wire: 19035/19035
  • Camera Micro Motor, Coil: 19035-S

Motor/DC Fan Semi-Finished Products Electrical Testing

Wound Component Function

The rotating electrical machine semi-finished products of motors, DC fans, etc. include the stator and rotor which need to perform electrical scanning tests of withstand voltage, DC resistance and layer short.

The 19035-m has no need for computer control and offers DCR four-wire measurement. The users can scan test two DUTs at a time by 8 sets of separable test terminals of separated Drive and Sense terminals to promote productivity.

  • CH 1, 2, 3, 5, 6, 7 can be set High/Off
  • CH 4, 8, can be set Low/Off

Sub-Step Function – Multi-UUT Testing

Sub Step Function

Parallel test is often used as a solution to promote the efficiency of withstand voltage tests during the production by manufacturers. However, if it is unable to set the current high/low limit correctly and caused the defect products to be released or the good products to be judged as bad and go to the subsequent stations for test, the stations and cost will be increased.

A sub-step function is provided by the Hybrid 19035 Series to solve the trouble caused by parallel test. The Fail can be set as a sub-step activation condition by editing the program sequence when parallel test is required for production. It means the substep test will conduct only when the main test item (parallel) is failed and judge which DUT is bad. With the implementation of this function, the efficiency of withstand voltage test will improve significantly on the production line.

Example :

  • Step 1: AC Hipot/pin1 to pin 5,6,7
  • Sub Step A: AC Hipot/pin1 to pin 5
  • Sub Step B: AC Hipot/pin1 to pin 6
  • Sub Step C: AC Hipot/pin1 to pin 7

40-Channel Scan For Wound Component Hipot Test

40-Channel Scan Diagram

The new, optional A190359 16CH HV External Scanning Box provides 16 test channels. Each channel can be set as H (High Voltage Output), L (Return Low), or Off. With a 19035 and A190359 combination, the efficiency of wound component tests can be improved. With one 19035 and two A190359 units, up to 40 test channels are available. In addition, the contact check and tests of multi-pin components or products can all be done at once.

User Manuals

Manuals - 19035 Hybrid Wound Component EST Scanner

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User Manuals for 16502 Milliohm Meter. Available documents are: Quick Start Guide - 19035 Quick Start Guide - 19035L Hardware User Manual - 19035 Hardware User Manual - 19035L All files in PDF format. ...

Application Notes

Open Short Check Function of Chroma Safety Analyzers

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Heater Testing Simplified With the Wound Component EST Scanner Model 19035

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At a minimum there are two production tests which all heater manufacturers perform in addition to ensuring the heater is operating properly. One test performed is a DC resistance test; the other test...

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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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