### Tube Limits

# Note

(only [value] fields can be modified)

### Tube: 1 ... 3

#### Max. Tube Voltage Limit [kV]

- range: [ 20...150 ] kV

The value must be programmed according to the max kV of the tube (see tube label). If a tube arcs during adaptation the max kV value can be reduced (or repeat the break in procedure, see doc INSTALLATION). After adaptation the programmed value is the max value which can be selected at the control desk (the adaptation table has no values beyond the limit kV value), even if a higher value is programmed thereafter in this field. The kV value with which the tube has successfully been adapted appears in 'Adapted To [kV]:'.
If a tube has been adapted with a higher kV than it should be used for (e.g. max 100kV for veterinary surgeons) the limit must be programmed in this data field afterwards.

#### Focus

- small, middle, large

The middle focus would be a third physical filament in a tube (not yet available), it is not the VARIO focus.

#### Min. Tube Voltage Limit [kV]

- range: [ 20...150 ] kV

All standard diagnostic tubes of the TUBE_R3.TDL tube file have a default min kV value of 40 kV, it can only be modified in a range > 40kV.

#### Adapted To [kV]

- gives the max available kV value at the control desk (after adaptation)

If this value shall be increased, first the 'Max Tube Voltage Limit [kV]:' must be increased. Then the tube has to be readapted afterwards to have the higher kV available for application.

#### Min. Tube Current Limit [mA]

- range: [ 0.1 ... 2000 ] mA

0.1 mA is the lowest current of the Optimus (fluoroscopy and TDC only).

0.2 The lowest mA value one can select at the control desk for exposures is 1 mA.

#### Max. Tube Current Limit [mA]

- range: [ 0.1 ... 2000 ] mA

The kV dependent max mA value is automatically limited by the tube type and the generator version:

- OM 50 kW max = 650 mA
- OM 65 kW max = 900 mA
- OM 80 kW max = 1100 mA

# Note

The max tube mA value is initially set by the tube data set of the tube file and cannot be increased.

It will be adapted to the individual focus limits during adaptation (within the total tube limits),

the max mA table can be seen in 'Select Unit' >> 'FU_mA' >>'Programming'.

If there is any application reason to decrease the max mA value it is possible, but it will influence all registration devices attached to this tube and might lead to problems, if additional reductions of the emission current and tube power are programmed in the individual 'APR Data Set's and/or in 'RGDV Data Set B'.