InnoVet Select
™
HF APR
Service Manual
80
14.0 THEORY OF OPERATION
14.1 Power Module
The Power Module contains microprocessor-driven control circuitry to spin the anode of
the x-ray tube, generate filament supply voltages, supply power for locks and collimation,
maintain monitoring of system status, and retain calibration information. Primary voltage
for the high voltage transformer is supplied by IPMs operating in a pulse width modulated
resonant circuit.
14.2 Operator’s Console
The Operator Console is a microprocessor controlled entry/display port connected with the
System Controller pcb through serial communications. APR techniques and calibration
data is stored in the Console and compared to the data in the Power Module to confirm
data accuracy. It is possible to upload site-specific calibration data from the Power
Module in the event of changing to a new Console. The factory default values for
calibration and APR techniques can be reburned into the Console. APR techniques can
be uploaded to a Memory Card or downloaded from a Memory Card into the bottom of the
Console if desired. The Operator/User can manipulate the APR techniques, changing and
storing as required to achieve the character of images desired.
14.3 High Voltage Transformer
The High Voltage Transformer steps up the voltage received at P1 and P2 to levels
required to make the x-ray tube conduct, ranging from 40 to 125 thousand volts. Filter
capacitors within the tank are part of the tuned resonant circuit. The assembly is filled with
Shell Diala AX, a highly refined non-PCB dielectric oil.
