Monitoring The Kv- And Ma-Controls - Siemens MOBILETT Plus Service Instructions Manual

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Monitoring the kV- and mA-controls

* Note on Err 3, Err 4 and Err 5:
kV
Fig. 1
NOTE:
MOBILETT Plus/ Plus E
Under the following conditions, the corresponding Err. message is sig-
naled:
0,8 ms
A change in heating value may be due to the following causes:
1. Measurement error in the kV measuring circuit.
a. too high + kV
(positive correction)
b. too low + kV
actual
(negative correction)
2. Change in generator output.
This may occur when exchanging the inverter or the single tank.
In each case, the heating values must be readjusted and recorded
(refer to P10 and P07 in the service program).
a. If the generator output is increased, this results in an increase
in heating value.
b. If the generator output decreases, the heating value will be
decreased.
Any change of the tube current involves a change in exposure time
(mAs = i x t)!
SPR8-215.898.02
Rev. 01
Display messages
Generates when
the measured value
is beyond the
limits during 0.6 ms
The measured kV must be
within + 5 kV from the kV
selected after 0.8 ms from
exposure start.
value results in increased heating value
actual
value results in decreased heating value
Page 20 of 22
01.02 SPS-UD
2
Time
Siemens-Elema AB
Solna, Sweden