Quantum ODYSSEY HF Series, Service Manual

Page: 460 / 493

Appendix D Calibration (Using Generator Service Tools)
HF Series X-ray Generators - Service Manual Revision W
Quantum Medical Imaging, LLC
D-33
2. Select Next to proceed to Filament Offset Calibration Intro 2 screen, or
you may select a particular Filament Offset Calibration to perform by
selecting its corresponding tab (choices are Small and Large). For this
example, "Small" is selected, as shown below:
Figure D-20. Sample Filament Offset Calibration Screen (Small is shown)
3. If using an oscilloscope, select Scope radio button (Step 1.) on the Small
Filament Offset calibration screen. Connect the scope leads between test
point TP7 on KVP Control Board A2 (AY40-003S) and ground. Set scope
for 1.0 volt/division, and 50 ms/division time base. This will give a 100
mA/volt equivalent for mA measurement as shown in the sample wave-
forms in Figure B-20.
4. If using a mAs meter, select Mas Meter radio button (Step 1.) on the
Small Filament Offset calibration screen. Remove two (2) green/yellow
wires marked "MAS METER", connected to A17P1-9 and A17P1-10, from
EXPOSURE
SETTINGS
ENTER PREHEAT
ADJUSTMENT
VALUE (BETWEEN
-2.00 AND +2.00)