Triple output high voltage power supply: −0.5 to 30 kV @ 300 μA, 0 to +5 V @ 0 to 3 A, 0 to −2 V @ 200 μA

Model 3602 contains three common high voltage power supplies used by scanning electron microscopes (SEM) within a compact 25 × 15 × 20 cm enclosure. The filament and Wehnelt voltages float on the accelerator voltage. All three are remotely programmable via an RS-232 or USB data port. Connection to a SEM is through a conventional 3-pin Federal Standard connector. A plug-in terminal block connects 24 VDC input power, an external safety interlock, and a HV On status bit.

Two status lights show serial communication activity and a heartbeat lamp indicates the processor of the 3602 is active.

The Wehnelt voltage is derived from the accelerator supply and controlled by an electronically programmable Wehnelt resistor.

A C-language demo program allows control over all supplies and reports communication activity. It displays the set-point of each supply and the actual measured outputs. An internal temperature sensor is also displayed.

NOTE: CPS has replaced the 3602 with Model 3603.