4.3 Fps Theory Of Operation; Figure 4-3 Filament Power Supply (Fps) Module - ferrotec Temescal CV-12SLX User Manual

4.3 FPS Theory of Operation

Interface board connector J4 routes all signals on the Interface board to the Regulator board.
Since the location of the unit's top cover interlock switch (which opens its contacts when the top
cover has been removed) is adjacent to the Interface PCB, board connector J5 provides the
shortest path for the switch's contacts to the interlock circuitry on the Regulator board.
Display and Control Board
The Display and Control board is sandwiched between the front panel and the Regulator board.
The Display and Control board houses and handles signals to/from an HV OFF pushbutton, an
output voltage adjustment potentiometer, voltage and current LCD displays, and the unit's front
panel LEDs.
4.3 FPS Theory of Operation
4.3.1 Overview of FPS Operation
The filament power supply module (see Figure 4-3) provides emission current control and
measurement, filament power and control, and high-voltage switching. The filament circuit
utilizes high-frequency switch mode technology similar to that of the high-voltage circuit. The
filament circuit requires single-phase power of approximately 208–230 V.
Figure 4-4 shows the locations of the major components in the standard FPS unit (i.e., FPS
CV-12SLX User Manual

Figure 4-3 Filament Power Supply (FPS) Module

4-4
Section 4: Theory of Operation
0101-8292-0, Rev. C