Checking The Generator Adjustment - Siemens SIREMOBIL Iso-C Troubleshooting Manual

42

Checking the generator adjustment

With the system on, connect the service PC to the SIREMOBIL Iso-C.
Select "Test..." in the Diagnostic menu.
Select cassette simulation in "Function Groups".
Select cassette switch on in "Available Functions". The SIREMOBIL Iso-C is now in
direct exposure mode.
Select 81 kV with the kV+ / kV- keys.
Select 8 mAs with the mAs+ / mAs- keys.
Connect oscilloscope channel 1 to D1.X46, ground at 0V. Set the sensitivity to 1V / Div.
Connect oscilloscope channel 2 to D1.X48, ground at 0 V. Set the sensitivity to 2.5V /
Div.
Set the time to 25 ms / Div.
Set the oscilloscope on storage mode.
X
Release an exposure with the hand switch and store the oscillogram with the exposure.
Evaluate the stored oscillograms. The tube current must reach the tolerance range of
13 mA 1.5 mA in a time of 3 ms, and may not leave this range for the next 6 ms (the
tube current may not run above 14.5 mA within the first 6 ms).
See also the oscillograms in
Select "Cassette switch off" on the service PC in "Available Functions". Direct expo-
sure mode is cancelled.
If the unit exceeds the tolerance range, the generator adjustment must be repeated.
Fig. 16:
SIREMOBIL Iso-C
(Fig. 16 / p. 42)
SPR2-230.840.01.01.02
08.08
Adjustments / Programs
and (Fig. 17 / p. 43)
kV-act (20 kV = 1.0 V)
mA-act (2.5 mA = 1.0 V)
Page 42 of 148
CS PS SP
5.2
and (Fig. 18 / p. 43).
© Siemens, 2008
For internal use only