The Model PRM (shown above) is used here with the Model AP High Voltage Holiday detector.
The Model PRM dimensions: 11” x  9” x 13” (28 x 23 x 33 mm)

The PRM is designed to measure the peak value of high voltage D.C. pulse within its scale range, with a maximum capacity of 40 Kilovolts. Measurement can be made of peak values with rise time of less than one microsecond. The Model PRM Voltmeter is portable and is ideal for use in the field or laboratory. The Model PRM may also be used in design or production testing to measure ignition voltages, over-voltages caused by switching of electrical circuits and other voltages that often accompany high potential testing. Absolute High Tech Integrated circuitry construction assures dependability and virtually eliminates maintenance.