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6 Automatic exposure modes
6.2
O
PERATION IN
1
Select kV and Density. The exposure control system will determine
the mAs/ correct exposure time when you make the exposure. A LED
light indicates that the Auto Time mode has been selected.
2
Change the selected filter if necessary.
Fig 6.2.
The mode display in Auto Time mode
NOTE!
If a correct optical density could not be reached, the Exposure monitor will
terminate the exposure in 50 ms. If this occurs, change the film cassette
and repeat the procedure, selecting a higher kV.
6.3
O
PERATION IN
1
Select required kV and mAs. The system will select the correct
exposure time (which depends on the selected mAs value).
2
Change the filter selection if necessary.
Fig 6.3.
The mode display in Manual mode
6.3.1
Adjustment of the mAs-values in Manual mode
Select the mAs setting. Pressing the mAs+ button increases the mAs value
and pressing mAs- button decreases the mAs value. The following mAs
values may be selected.
2
3
8
10
25
32
80
100
200
250
450*
500*
Table 6.1 Selection of mAs values
* not allowed in N.Y.
50
A
T
UTO
IME MODE
M
ANUAL MODE
4
12
16
40
50
125
150
300
350*
GE Healthcare
5
6
20
63
175
400*
86500-IMG rev 3
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