Philips X-Mode Limits User manual

X-Mode Limits

Limit values can be defined for all available techniques. Some values look as if they are out of limit
which they are indeed, but there are additional basic limit values programmed in the generator
firmware. These are exposure technique dependent.

As an example the field of the "Falling Load" technique:

X-ray Mode: AEC falling load kV
Min. Time Limit [ms]: [ 1.00]
Max. Time Limit [ms]: [60000.00]
Min. Current Time Product Limit [mAs]: [ 0.001]
Max. Current Time Product Limit [mAs]: [ 580.000]

Min. Time Limit [ms]: Is always 1ms for all non-AEC (Automatic Exposure Control) techniques.

Exposures with AEC might be switched shorter than 1ms.

Max. Time Limit [ms]: Basic limits are technique dependent and can not be changed or increased:

AEC falling load kV 4000ms
AEC fixed current kV-mA 4000ms
TDC (tomo density control) 6000ms
/ kV-mA-ms 16000ms
free techniques ‹ kV-mAs 16000ms
\ kV-mAs-ms 16000ms

Min. Current Time Product Limit [mAs]: The smallest mAs - product is 0.5mAs.
AEC exposures with less than 0.5mAs are possible.

Max. Current Time Product Limit [mAs]: The default mAs - product is 580mAs for all AEC-techniques.
850mAs is the absolute limit at which the generator in always terminates.

!! Local limits have to be taken into consideration.