Microtest 7631HD Hipot Tester (16-Channel, DCR)

The Microtest 7631HD Hipot Tester combines 16-channel safety testing with built-in DC resistance measurement, delivering AC withstand voltage up to 5000 V, DC withstand up to 6000 V, insulation resistance up to 12 GΩ, and DCR measurement from 10 mΩ to 100 KΩ in a single instrument. The “HD” designation reflects the doubled channel count (16 vs. 8 on the standard 7631) and the integrated DCR function that eliminates the need for a separate resistance meter in the test workflow.

Specifications

Feature	Specification
Channels	16
AC Withstand	Up to 5000 V
DC Withstand	Up to 6000 V
Insulation Resistance	Up to 12 GΩ
DCR Measurement	10 mΩ to 100 KΩ
Arcing Detection	Configurable sensitivity
Test Sequences	Programmable multi-step
Scanner	Internal matrix for 16-channel routing
Interface	Handler, barcode, USB/RS232
Safety	Interlock, GFI protection, emergency stop

Integrated DCR Measurement

The built-in DCR function measures winding resistance from 10 mΩ to 100 KΩ across all 16 channels, verifying copper continuity, crimp integrity, and correct wire gauge without removing the DUT from the safety test fixture. DCR measurement is essential for detecting open circuits, high-resistance solder joints, cold crimps, and incorrect wire gauge, defects that hipot testing alone cannot identify. Combining DCR and safety testing in a single instrument and fixture reduces test cycle time and eliminates handling between separate test stations.

16-Channel Architecture

With 16 base channels, the 7631HD handles complex multi-winding transformers and coil assemblies that exceed the 8-channel capacity of the standard 7631. A 16-winding transformer requires 120 unique winding pair combinations for complete hipot verification, the 7631HD routes all combinations automatically through its internal scanner matrix. The higher channel count is particularly valuable for multi-tap power transformers, telecom isolation transformers, and automotive gate drive transformer assemblies.

Applications

Transformer manufacturers producing complex multi-winding designs, motor winding facilities requiring both safety and resistance verification, and EMS companies performing incoming inspection on wound components all benefit from the 7631HD’s combined hipot + DCR capability. The 16-channel capacity covers complex winding configurations without expansion modules, simplifying fixture design and reducing capital cost.

GSAS Micro Systems provides the Microtest 7631HD Hipot Tester to transformer and coil manufacturers across India with INR invoicing, test sequence programming, and fixture design consultation. Engineering teams in Bengaluru, Hyderabad, Chennai, Pune, Mumbai, and Delhi NCR provide local demonstration, commissioning, and after-sales support. Contact GSAS for a detailed specification review and quotation.