|
X-Ray Tubes and Electron Guns
- XF025, XF030, XF040, XF050
- 25kV to 50kV 100W X-ray Power Supplies with floating heater
- X-ray tubes and electron guns
Features
- -25kV, -30kV, -40kV or -50kV at 2 mA
- Heater isolated to 50kV 5V at 3 Amp
- Short circuit and flashover proof
- High efficiency, 24 hour burn in
- Safety assessed to EN61010-1
- Beam Current Control, stabilised by heater current.
- Controlled turn-on. Minimises turn-on stress to tube and filament.
- Stand-by Heater Current:, set by Internal potentiometer. 0-100%
- Maximum Heater Current, set by internal potentiometer. 0-100%
|
 |
The XF series is based on the HW50/2N (data sheet REF/HW97 refers). It includes an isolated filament supply whose power is controlled to stabilise the beam current and is intended to operated an X-ray tube in the grounded anode mode (filament floating) at up to 50 kV 2 mA. Control of the output voltage & current is by internal potentiometers or by external 10 volt analogue control voltages. All units are short circuit proof and use high frequency pulse width modulated switching techniques, in conjunction with a ferrite step-up transformer to control the output voltage.
Please contact the factory for special versions of this power supply.
Safety Instructions
Electrical Specification
|
|
UNIT TYPE
|
OUTPUT VOLTAGE
|
O/P RIPPLE
|
FILAMENT |
FILAMENT RIPPLE |
| XF025NAA300 |
1.5kV to 25kV at 4mA |
<1% peak to peak |
3A @ 5V DC
Connected to HV -ve |
<1V peak to peak,
frequency 60kHz |
| XF030NAA300 |
1.8kV to 30kV at 3mA |
| XF040NAA300 |
2kV to 40kV at 2.5mA |
| XF050NAA300 |
3kV to 50kV at 2mA |
| INPUT VOLTAGE: |
24 volt d.c. ±10% at 7A.
Negative input terminal common to HV earth return. |
| HV LINE REGULATION: |
Less than 0.1% for input changes of 1 volt. |
| VOLTAGE CONTROL: |
INTERNAL potentiometer or 10V analogue signal.
(0 to +10V gives zero to -50 kV output). Input impedance > 10 kohm. |
| BEAM CURRENT CONTROL: (BEAM CURRENT STABILISED.) |
INTERNAL potentiometer or 10V analogue signal.
(0 to +10V gives 0 to 2 mA). Input impedance > 10 kohm. |
| MONITORS: |
Voltage 0 to +10V represents zero to -50 kV
(Accuracy ±3%, source resistance 10 kohm.)
Current 0 to +10V represents zero to 2 mA
(Accuracy ±5%, source resistance 10 kohm.)
Filament 0 to +10V represents zero to 3 Amps
(Accuracy ±10%, source resistance 10 kohm.) |
| LOAD REGULATION: |
Less than 0.1% for load changes from 10% to maximum.
(Measured at maximum voltage). |
| ON/OFF: |
Output voltage and heater slow rise to set levels when control pin is low (<1.5V). |
| OVERLOAD PROTECTION: |
Flashover and short circuit proof.
Trip on over current (both HV & heater turn off) reset by on/off. |
| TEMPERATURE CO-EFFICIENT: |
300ppm per °C. |
| OPERATING TEMPERATURE: |
0 °C to +45 °C. Over temperature cut out. |
| STORAGE TEMPERATURE: |
-35 °C to +85 °C. |
| R.F.I.: |
Choke input filter. Steel case for low radiated magnetic field. |
| SAFETY: |
Meets or exceeds requirements of EN61010-1. |
Mechanical Specification
|
|
SIZE:
|
280 x 240 x 70 mm. |
|
OUTPUT:
|
By twin 1 metre TV50 screened cable. Use screen of cable as the ground return (shortening this cable will degrade the ripple). |
| POWER INPUT CONNECTOR: |
Molex 6 pin 0.2" (mating connector supplied). |
| CONTROL INPUT CONNECTOR: |
Molex 0.1" 10 pin. |
| COOLING: |
External fan cooling is provided - it is essential this airflow is not blocked. |
|
