Siemens MOBILETT Plus - Page 29

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Siemens-Elema AB Register 6 SPR8-215.850.02 Page 1 of 2 MOBILETT Plus/ Plus E
Solna, Sweden Rev. 01 01.02 SPS-UD
Selection and display of exposure parameters 9
The block diagrams and the wiring diagram X037E, sheet 120 are the basis for the func-
tional description given below.
The control circuit for selecting the exposure parameters includes the boards D1 and D3
and the Control and display panel.
The kV values are selected with the kV selection buttons "kV+” and ”kV-” on the
Control and display panel.
There are different options for parameter selection:
MOBILETT Plus;
A with 25 individual steps over a range of 40 – 133 kV in whole exposure points
or
B with 49 individual steps over a range of 40 – 133 kV in half exposure points.
MOBILETT Plus E;
A with 24 individual steps over a range of 40 – 125 kV in whole exposure points
or
B with 47 individual steps over a range of 40 – 125 kV in half exposure points.
The desired option is selected in service program P14.
The same service program also serves to set the maximum possible selectable kV
value in the range from 40 – 133 kV for MOBILETT Plus, and 40 – 125 kV for
MOBILETT Plus E.
The mAs values are selected with the mAs selection buttons ”mAs+” and ”mAs-” on the
Control and display panel.
For a given kV, mAs can be selected from 0.5 up to a kV-dependent maximum mAs value.
The maximum selectable mAs value is set in service program P15. The current
upper mAs limit is shown in the parameter display, and can be set within the range
0.5 – 200 for MOBILETT Plus, and the range 0.5 – 100 for
MOBILETT Plus E.
Note that the kV-dependent maximum mAs value may be lower than this absolute maxi-
mum mAs, at a given kV.
The procedure for selecting service program P14 or P15 is described in the
Service Instructions.
The selected exposure parameters are shown on the Control and display panel.
Briefly pressing a selection button results in an incrementation/decrementation of the
exposure parameter.
Holding a selection button depressed results in an increase/decrease of the exposure
parameter, at first slowly and then faster.
On reaching the minimum value of 40 kV or the preset maximum kV value, the kV
increase/decrease automatically stops.
In the same way, on reaching the minimum mAs value or the maximum mAs value for this
kV, the mAs increase/decrease automatically stops.