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Test exposures
5.2
BIAS voltage check
PMF
The BIAS voltage settings shall be checked.
Required equipment
Voltmeter with sharp probes, a small screwdriver, a compression plate simulator, and a
magnification table.
Required documents
Calibration data for the x-ray tube (found on a note called "prüfprotokoll" in the MAMMO-
MAT Novation
Procedure
•
Turn ON the main power supply to switch the detector ON. Allow a detector warm-up
time of 1 hour.
The detector should be powered on at least 1 hour before intended use. If it is used
sooner than 1 hour after being powered on, image quality can be affected.
•
Press button
time of approximately 5 minutes. The internal monitoring system automatically per-
forms a functional check of the MAMMOMAT. "dr" is displayed on the film density dis-
play on the control panel to indicate that communication within the MAMMOMAT
Novation
•
Attach a magnification table so that small focus is selected.
It does not matter if a 1.5x or 1.8x magnification is selected.
•
Mount a compression plate simulator.
•
Select Mo anode on the control panel. Measure the voltage for the Mo anode at connec-
tor X726 on the tube power supply between pin 1 (BIAS_VOLTAGE) and pin 6 (0V).
The measured voltage(s) must correspond to (tolerance + 1V) the calibration data for
the X-ray tube. If this is not the case, adjust the "Bias Mo" potentiometer until the volt-
age corresponds to the calibration data (tolerance + 1V).
•
Perform the same procedure as in step
Siemens AG
Medical Solutions
DR
Technical Manual).
on the control panel to turn the MAMMOMAT ON. Allow a warm-up
DR
system is functioning.
SPB7-250.831.01.02.02
08.04
2
with W and adjust the "Bias W" potentiometer.
Page 25 of 32
CS SD 24
25
MAMMOMAT Novation
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