Siemens MAMMOMAT Balance, Troubleshooting Manual, Page: 29 / 62

Filament
MAMMOMAT Balance SPB7-115.840.01 Page 29 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
To enter
mAL current calibration set DIP2 of SW1 ( PCB 01-170) = ON .
In the mAs window of the display, the following parameters will appear:
•
mAH or mAL , filament current I
f
in Ampere;
•
mAs value selected before entering calibration mode
•
after exposure , expected anode current value and exposure
I
a
in mA .
After exposure the following condition can be reached:
a) Anode current less than 70% of the expected value
in place of the anode current value, on the display LLL.L will appear.
It means that exposure ended by means of Back-Up Timer.
Increase
I
f
filament current by 0.050 and repeat the exposure.
If the display indication is still LLL.L , repeat the above point till you get the indication of mA value
and no more the [LLL.L]
b) Anode current higher than 10% above expected value
in place of the anode current value, on the display HHH.H will appear.
Decrease
I
f
filament current by 0.050 and repeat exposure.
If the display indication is still HHH.H , repeat the above point till you get the indication of mA and
no more the HHH.H .
mAH
I
f
4,710
A
90 I
a
90,1
mA
mAs
40