### Fault Exposure Detection

#### AEC

Detailed explanation and sketches see Service manual Optimus (R/F, RAD, C); Tab 3; FAULT FINDING

off = No 4% dose supervision at 10% of the backup exposure time, automatically off after APR overriding

on = (default) At 10 % of the backup exposure time (APR mAs value) DRC detects if at least 4% of the expected dose (signal must be > 20mV) have been measured. If not, the exposure will be switched off by CU.

#### TDC

Detailed explanation and sketches see Service manual Optimus (R/F, RAD, C); Tab 3; FAULT FINDING

off = No 4% dose supervision at 10% of the backup exposure time, automatically off after APR overriding

on = (default) At 10 % of the backup exposure time (APR mAs value, not before 250ms, tomo time > 1000ms) DRC detects if at least 4% of the expected dose (signal must be > 20mV) have been measured. If not, the exposure will be switched off by CU.

### CONT

factors for continuous fluoroscopy can be modified:

scantime_TV [ms]: default = 20 ms (must be 20 ms for 50 and 60 Hz)

range = 0 ... 60000 ms

scantime_TV valid: yes = default

must be ‘yes’ without CAN driven R/F system controller

no = only possible with a CAN driven R/F system controller

P_max_EDL [W]: default = 250W

range = 0 ... 9000 W, max entrance dose limitation,

active, if WB X12 pins 1-10 closed (SID < 100 cm)

see Service manual Optimus (R/F, RAD, C); Tab 6; ADJUSTMENTS

TV_pos_limit [V]: default = 6.885 V

range = +3 ... +7.5 V ADC input of TV chain

TV_neg_limit [V]: default = -6.885 V

range = -7.5 ... -3 V ADC input of TV chain