Siemens AG SPR8-230.831.30.03.02 MOBILETT XP Digital
11.05 CS SD 24
Inspection and maintenance 63
Page 63 of 74
Medical Solutions
The mAs value can be calculated with the help of the oscilloscope display.
Calculating the mAs value (example):
Fig. 29: mAs calculation
Surface "A" corresponds to the mAs value.
PMF kV accuracy 40 kV, 5 mAs
PMF kV accuracy 81 kV, 2 mAs
PMF kV accuracy 133 kV, 10 mAs
• Calculate and record the mAs values.
mAs meter method:
Use of the mAs jumper on PCB D907 directly on the single tank.
• Remove the cover from single tank and connect the mAs meter to D907
(1/Fig. 30 / p. 64).
• Follow the same procedure as described in the “Oscilloscope method” section.
For more information on the measuring technique, refer to the user manual for the mAs
meter.
mAs = Tube current x Exposure time
mAs = 340 mA x 0.006 s = 2.0 mAs
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