The 4328A is a low-resistance ohmmeter with a range of 100 milliohms to 100 Ohms. It uses AC-based Kelvin bridge measurement setup and passes no more than 20mV through the device under test.

Option 001 provides battery-based operation.

The front panel connector is Hirose part number RM12BPE-5PH(71), DigiKey p/n HR1732-ND as of 2019.

The original battery packs (2x) are Yuasa 5/225FZ. This is a stack of five Yuasa 225FZ NiCd button cells, 1.2V, 225mAh, 25mm diameter, 8.5mm tall.

Connector pinout:

Connection example: pins 1 & 3 should be connected to one terminal of the DUT, and pins 2, 4, & 5 should be connected to the other.