### Tube Adaptation

The tube should be properly conditioned before starting the adaptation procedure.
Conditioning procedure see doc INSTALLATION.

# Note

for all CAN connected systems:
Since release 5.x of Bucky controller
- BuckyTH2
- Bucky unit easyDiagnost
or if connected to a
- Digital Diagnost :
Remove CAN bus connections EZX42-1 and 43-1 and signal bus connection EZX23 from the backpanel. After turn-on it might take about 2 minutes for the generator to energize ENK1 indicating that the generator is ready.
Select free cassette auxilary
RGDV 4 at BuckyTH2 and Digital Diagnost
or
RGDV 8 Bucky unit easyDiagnost
RGDV4 or RGDV8 'Data Set A' has to be modified, only these settings have to be changed:
- Syncmaster present = No
- Mounted radiographical controller = none
Transmit the 'Data Set A' screen with <F2> and push the free cassette RGDV button, then the modified data are valid (a generator warm start is not required).
The generator should now be in ready condition RGDV free cassette.

Al other systems should use a non-grid auxilary to carry out adaptation.

Tube adaptation is an automatic process which includes the

1) measurement of the mA offset value that is caused by
- the kV measuring circuit
- the emission current feedback circuit (VCO)

2) measurement of the individual standby filament current (based on 100uA)

3) kV dependent filament / emission current characteristic

4) positive and negative boost adaptation where the inertia of the filament with respect to heating up and cooling down is registered (more information see doc FAULTFINDING).

After selection of 'Tube Adaptation' with <ENTER> a screen asks to wait 20 seconds after the screen coming up thereafter has been sent with <Apply> or <F2>.

Press <ENTER> and select:

Tube: 1st Tube

2nd Tube not applicable for Optimus C

3rd Tube not applicable for Optimus C

Focus: small

medium a tube with a (third) medium filament does not exist yet, it is not VARIOfocus

large

After <Apply> the green ready disappears from the desk for 20 seconds. The "Test" display on the right side of the major exposure parameter indicating a non-adapted focus will change to "Adap". With adapted tubes parameters like "film-screen-combinations" or "xxx ms" will disappear and will also be replaced by a "Adap" during re-adaptation.

Ready returns with a first data set 40kV 0.00mAs to measure the mA measuring circuit offset.
- Start the adaptation procedure by pressing the hand-switch in PREP and EXP position continuously.
- The anode will be accelerated and braked several times during the entire adaptation process.
After about 30 sec after the fist 40kV 0.00mAs exposure 40kV 1.5mAs will be switched for 6 seconds to measure the individual standby filament current.
After another 20..30 seconds exposures with different kV stages are switched (about 120 / filament), there will be a little pause at the end of this process.
4 min after start of adaptation the boost adaptation takes place. One exposure is for the positive boost to measure the boost up time, a second one (which is the last exposure of adap) for the negative boost to measure the cooling time. The tube will brake the last time, a beep at the PC and a window on the screen will ask to reset the generator.
There is no exposure end beep during the entire adaptation procedure.

During the adaptation it might happen, that the procedure stops for a while. The red light of the temperature traffic light might turn on and warning entries 00BV are logged. If the TTS (Tube Temperature Supervision) detects a temperature in a critical range it will stop adaptation for a while to keep adaptation always at a 100% load range.

After adaptation followed by a generator reset all techniques are available and "Test" disappears.
AEC, AECF, TDC, kV-mAs, kV-mA-ms, kV-mAs--ms techniques and Fluoro (small focus only) are not available as long as the filaments are not adapted.

VARIO focus as a "calculated" virtual focus requires that small and large focus are adapted. APR using VARIOfocus cannot be selected as long as both, small and large, are not adapted.