Siemens MOBILETT Plus HP - Page 17

Display messages 2 - 5
Siemens AG SPR8-220.061.03 Page 5 of 22 MOBILETT Plus HP
Medical Solutions Rev. 03 09.03 CS PS 24
CAL 7 During
exposure
The exposure time
has reached its max-
imum value.
The maximum exposure time is 4 s.
• The exposure is normally
interrupted earlier by "Err 5".
• Check the capacitance in the
capacitor bank (see section "P03 -
Capacitor bank and charging test").
• Check the filament heating (see
section "P01 - Filament test").
• Check the tube current in
measuring point "MAPOS" on D1
(see pages 140 and 141).
• Check the current to the single tank
(see section "Error diagnosis HT
and single tank").
Err 9 During
exposure
When measuring the
kV value, a large
high tension asym-
metry is detected.
Normally the kV value is symmetric
around ground. The acceptable devi-
ation is ± 19.5 kV. This corresponds
to HTD 2.5 V± 0.5 V.
• Intermittent measurement cables
or defective single tank.
• Check the measurement cable K9
between D1 and the single tank
(see page 140**).
• Check the current to the single tank
(see section "Error diagnosis HT
and single tank").
• Measure the HTD signal on D1 and
compare it with notes and curves
on page 140 and 141**.
Dis-
played
messages
Mode of
operation
Cause Possible reasons and advice
* See section "Monitoring the kV and mA values"
** Wiring diagram X037E
Tab. 1