LORAD AFFINITY Series, Service Manual

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P/N 9-500-0255 4-1
Service Manual
Chapter 4: Calibrations and Performance Checks
Introduction
Chapter 4: Calibrations and Performance Checks
1.0 Introduction
This chapter contains the Affinity Series calibration, adjustment, and performance and
compliance check procedures. The procedures described in the following sections are as
follows:
Caution: Always observe Electrostatic Discharge (ESD) precautions when working
with electronics and electronic components.
• Calibration Procedures (Section 2.0)
• Performance Check Procedures (Section 6.0)
• X-ray and Light Field Check and Alignment (Section 7.0)
• Mechanical Adjustments (Section 8.0)
Attention: X-Ray exposures taken in rapid succession may exceed the thermal
capacity of the system. During periods of numerous x-ray exposures, such
as during service calibration or physicist accreditation, please wait a
minimum of 40 seconds between exposures to allow adequate cooling of
the x-ray tube and high voltage electronics.
2.0 Calibration Procedures
Use the following procedures to setup, check, and calibrate the mammography unit’s
exposure generating system, the automatic exposure control system, C-arm Safety
microprocessor board, and the compression control system. On initial installation, always
perform the procedures in this section in the order that they are presented to ensure proper
setup and calibration.
To download Calibration Data to a Laptop Computer, refer to Chapter 5, Section 3.3.
Warning: Service engineers must take appropriate radiation safety measures
when testing (or maintaining) the unit.
Note… When servicing the Affinity, if a procedure instructs you to remove the
Gantry right-side cover or the tubehead covers, do not replace these covers
until all required procedures (e.g., calibrations, adjustments, tests, remove
and replace, etc.) are completed.