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DF/FF Series

Ideal for Common XRD & XRF X-Ray Tubes
Designed for Common XRD & XRF X-Ray Tubes
Compact Size, 5 1/4” (3U) High Chassis
Solid Encapsulation Ensures Maintenance-Free Operation
Auto Ramp of the HV Emission Current to Preset Values
OEM Customization Available

Certifications & Compliance

Spellman’s DF/FF Series of X-Ray Generators feature our new inverter design which incorporates IGBTs for power switching and provides new levels of reliability. In addition, re-engineering of the DF/FF’s internal filament power supply eliminates audio noise at normal operating levels by operating at a higher frequency. The DF/FF’s utilize a sine wave current source, produced by phase shifting series resonant circuits at switching frequencies greater than 20kHz to generate high voltage dc. This technique eliminates undesirable electromagnetic radiation normally associated with switching and power control regulators. The high efficiency of these units allows for air cooling in a 5 1/4” (3U) high chassis.

Specifications
Models

Specifications

^{(Ref. 128001-001 REV. T)}

Input Voltage:
220Vac ±10%, 50 or 60 Hz, single phase (three phase optional).
Output Voltage:
DF3: 0 to 60kV negative polarity.
FF3: 0 to 60kV positive polarity.
Other output voltages are available.
Output Current:
DF3: 0 to 80mA.
FF3: 0 to 100mA. Other output currents are available.
Maximum Output Power:
3kW (4kW optional).
Output Voltage Regulation:
Load: 0.005% of rated output for full load change
Line: 0.005% of rated output over specified input range
Temperature Coefficient: 50 ppm/˚C (20 ppm/˚C optional)
Long Term Stability: 0.01%/8 hours.
Emission Current Regulation:
Load: 0.01% of rated output for a 10 to 60kV change
Line: 0.005% of rated output over specified inputs
Temperature Coefficient: 50 ppm/˚C
Long Term Stability: 0.01%/8 hours
Filament Voltage:
DF: 12Vac
FF: 12Vdc
Filament Current:
5A (up to 12A max available)
Ripple:
0.03% rms <1kHz, 0.75% rms above 1kHz
Dimensions:
51/4”(3U) H x 19“ W x 22” D (13.3cm x 48.3cm x 55.9cm).
Weight:
90 lbs (40kg).
Regulatory Approvals:
Compliant to EEC EMC Directive. Compliant to EEC Low Voltage Directive.

Models

Model	kV	Power (W)	Polarity
DF60N3	60	3000	N
DF60N4	60	4000	N
FF60P3	60	3000	P
FF60P4	60	4000	P

Typical Applications:

X-Ray Diffraction (XRD)
X-Ray Fluorescence (XRF)

Application Notes

AN-12: The Benefit of Using a Current Source to Power X-Ray Tube Filament Circuits AN-14: The Limits of Front Panel Digital Meters AN-01: X-Ray Tube Optimization

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