P/N 9-500-0255 A-11
Service Manual
Appendix A: Specifications
System Specifications
Density Adjustment Steps 11 density adjustment steps (-5 to +5 in adjust-
able steps of 6%, 8%, 10%, or 12.5%) provide
a difference in mAs from the adjacent step.
These are field selectable at installation.
AEC Mode Operating Ranges
1.16 Modes of Operation
Manual Exposure Mode kV, filter, & mAs are user selectable.
Auto-Time Exposure Mode kV, filter, and density are the only factors that
are selectable. The system terminates exposure
automatically at the mAs value that yields the
calibrated optical density. Post mAs values dis-
play after exposure termination. This mode is
valid with either the Molybdenum or Rhodium
filter selected. The exposure mAs may be mod-
ified up to ± 80% by incrementing or decre-
menting the DENSITY function. If
determination is made during the AEC sample
period (first 50 ms) that the exposure will
exceed the “Back-Up-Time”, the exposure ter-
minates in less than one of the limits specified
in the Exposure Termination section.
Auto-kV Exposure Mode, SRL 2000 Bucky Operation
When this mode and the Molybdenum filter
are selected, the system kV will be the default
kV selected in the exposure defaults screen.
The starting kV may be changed to either 25 or
26 kV by the operator. When the Rhodium fil-
ter is selected, the kV will default to 28 kV.
Upon exposure initiation, the AEC signal is
sampled and the kV may be incremented
upward to a maximum value of 30 kV if the
Molybdenum filter is selected, or 32 kV if the
Rhodium filter is selected. The exposure is ter-
minated at a mAs value near one of the
selected mAs windows (125 mAs, 165 mAs,
200 mAs, or the AUTOmatic 200 mrad win-
dow). The final kV and post-mAs is displayed
after exposure termination.
Auto-kV Exposure Mode, HTC Bucky Operation
When this mode and the Molybdenum filter
are selected, kV defaults to a value determined
by the Compression Height Threshold setting.
The kV defaults to 24 kV for a compression
height value less than one-half of the compres-
Mode kV mAs
Auto-Time 20to39kV 5to500mAs
Auto-kV 25to30kV 5to500mAs
Auto-Filter 25 to 32 kV 5 to 500 mAs
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