Siemens MAMMOMAT Maintenance Instruction page 16

Values form the above table are valid only if VTP8 is 5.00 Vdc (standard calibration).
NOTE
If for any reason kV are not correct within no more than 1kV calibration is possible
By means of RV5 PCB 94-132.
If calibration is necessary, Pivot value is 28kV
kV values are not affected by the replacement of Inverter or H.V. transformer if VTP8
is 5.00Vdc (standard calibration).
PMF External kV check
Measurement of the kV value with non-invasive instruments MUST be done exclusively with
Molibdenum anode and Molibdenum filter without compression plate.
Measurement of the kV value done with non-invasive instruments is affected by intrinsic linearity error
depending on the kV. It is advisable to refer to the instrument manual and in particular to the
indications about corrective coefficients depending on the kV and the thickness of the Molybdenum
filter. A tube that shows metallization problems on the ray window does not allow correct non invasive
measurement of the kV and MUST nevertheless be replaced.
The most reliable and precise measurement is done with an external HV divider.
MAMMOMAT Balance
Maintenance Instructions
KV
VTP1/2 (±1%)
20 kV
21 kV
22 kV
23 kV
24 kV
25 kV
26 kV
27 kV
28 kV
29 kV
30 kV
31 kV
32 kV
33 kV
34 kV
35 kV
kV to TP1/TP2 PCB 94-132 conversion table
SPB7-115.831.01 Page 16 of 22
Rev.01 05.04
7 High tension power supply
279 Vdc
293 Vdc
307 Vdc
320 Vdc
334 Vdc
348 Vdc
362 Vdc
376 Vdc
390 Vdc
404 Vdc
418 Vdc
432 Vdc
446 Vdc
460 Vdc
474 Vdc
488 Vdc
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