Siemens MAMMOMAT, Инструкция по обслуживанию, Страница: 19 / 22

8 Miscellaneous
MAMMOMAT Balance SPB7-115.831.01 Page 19 of 22 Siemens AG
Maintenance Instructions Rev.01 05.04 Medical Solutions
•
Disable potter bucky by inhibiting compressor release at exposure end and pressing the
"Compr" key
•
Position detector at first stop on patient side
•
Position the 7-cm-thick Phantom so to completely cover the detector.
•
Repeat the test for each one of the three fields.
This configuration was so chosen as to exclude all variable elements that may exist between the
X-ray source and the detector.
•
Carry out an exposure and then check that [r] value is within
±
10 of the value from the
phantom label.
•
At the same time check that [o] value is not 0 (zero) or higher than 12.
If values are out of range adjust according to Service Instruction SPB7-115.840.01... .
SIE
Calculated Dose test
•
Refer to Service instruction SPB7-115.840.01… and check values according to previous
calibration report.
PMF Table functions and safety locks
•
Check that control LED and sensing micro-switches are working properly as described in the
Instruction for use SPB7-115.629.01… .
PMF Blocking exposure release
•
Exposure release must be blocked under the following conditions (indicated on the control
console):
- No cassette is inserted.
- Cassette was not changed after the last exposure.
- No collimation plate
SIE
Emergency STOP
•
Press Emergency STOP on each side of the unit, one at a time, and check that unit is
completely switched OFF
SIE
Exposure and error data recorder
•
Read out the last 1300 exposures/errors memory and error log file with the Service PC and
software .
SIE Delete Exposure and error memory
•
Reset it by means of control panel pushbuttons 12 + 9 (+/-) all together, long beep will show
that memory clear is in progress.
SIE Annotate exposure counters
•
Unit has two different exposure counters that for different reasons can differ between them.
Annotate exposure counter from technical menu and PCB 03-188
QIQ Testing film O.D. linearity
•
Attach the most frequently used exposure system (e.g. grid table 18 x 24).
•
Load the "test cassette" with film and insert it.
•
Verify same conditions of previous calibration and/or maintenance
QIQ Testing image quality
•
Attach the most frequently used exposure system (e.g. grid table 18 x 24).
•
Load the "test cassette" with film and insert it.
•
Position the SIB phantom over 2 cm Plexiglas or other IQ phantom (e.g.Normi 7).
•
Select Zero Point mode and automatic decompression.
•
Compress somewhat and release an exposure.