GE_OEC_9600_C-Arms

GENERATOR CALIBRATION
The procedures contained in this section are used to test and calibrate the 9600 Mobile
C-Arm. The following procedures are included:
• X-ray Calibration
• Entrance Exposure
These procedures assume that all parts are installed and are wired correctly. It is also
assumed that all subassemblies are either known to be operational or were previously
tested at the factory.
X-RAY CALIBRATION
OVERVIEW
This section describes the X-ray generator calibration procedure for the 9600 Mobile
Imaging System. The 9600 C-Arm generator is a precise instrument that is software
controlled for exceptional accuracy and repeatability. Each generator is calibrated so
that the individual characteristics of the X-ray tube and generator components can be
accounted for by software to produce the desired techniques. Please note that
generator software is not interchangeable between different 9600 C-Arm systems.
Calibration of the generator is a semi-automatic process once the proper equipment has
been installed. The individual performing the calibration is required to press keys,
change Dynalyzer settings, and zero Dynalyzer offsets at various times during the
calibration process. The operator will be prompted by the software to perform the
appropriate actions when needed. The system should never be left unattended during
the calibration process.
The following stages have been determined to be the best procedure for performing the
calibration:
1. Setup Equipment - The calibration equipment is connected to the C-Arm and setup
for the calibration procedure.
2. Access Calibration Software - Generator calibration software is accessed from the
Mainframe Menu.
3. Duty Cycle calibration - Calibration software automatically makes approximately
250 exposures at various kV and mA levels to determine the characteristics of the
X-ray tube filaments. This data is written to a file (CARM.DC) for calculations after
the exposures have been completed. Calculations are made and the information is
written to the EEPROM on the Technique Processor PCB.