Wiseman DF Series 4 kW Rack-Mount High-Voltage DC Power Supply (70 kV)

Overview

The Wiseman DF Series is a precision-engineered, 19-inch rack-mountable high-voltage DC power supply designed for demanding scientific and industrial applications requiring stable, low-noise, and highly protected 70 kV operation. Based on solid-state modular architecture and optimized high-frequency resonant conversion topology, the DF series delivers regulated unipolar DC output from 1 kV to 70 kV at up to 4 kW continuous power. Its core design emphasizes metrological-grade stability—achieving <0.02% output drift over 8-hour intervals after thermal stabilization—and ultra-low ripple (<0.03% p-p), essential for electron optics alignment, mass spectrometer ion acceleration, and X-ray tube biasing where voltage perturbation directly impacts resolution and signal-to-noise ratio. The unit operates from standard single-phase AC 220 V ±10% (with optional three-phase input), incorporating active power factor correction and intelligent thermal management to sustain rated output across ambient temperatures from 0 °C to +50 °C.

Key Features

• Wide programmable output range: 1 kV to 70 kV DC, continuously adjustable via front-panel multi-turn potentiometers or analog 0–10 V remote control signals
• High-power capability: Up to 4000 W continuous output with dynamic load regulation maintained within ±0.05% under full-load and ±10% input voltage variation
• Exceptional stability: <0.02% long-term drift (8-hour window post 1-hour warm-up); temperature coefficient of 25 ppm/°C (15 ppm/°C available on request)
• Low-noise performance: 0.03% peak-to-peak ripple ensures minimal interference in sensitive detection systems such as time-of-flight mass spectrometers and electron microscopy column supplies
• Comprehensive protection suite: Independent hardware-based monitoring for overvoltage, overcurrent, short-circuit, arc detection, overtemperature, and safety interlock compliance
• Flexible control and monitoring: Standard Ethernet and RS-232 interfaces; optional RS-422; analog 0–10 V setpoint and monitor outputs (JP1 header) for integration into PLC or DAQ-controlled test benches
• Rack-optimized mechanical design: 3U (132 mm) height, 19″ width (483 mm), and 610 mm depth—fully compliant with EIA-310-D standards for laboratory and cleanroom installations
• CE-marked construction with reinforced creepage/clearance distances, double-insulated HV output path, and recessed HV connector interface using shielded, oil-filled cable termination

Sample Compatibility & Compliance

The DF series is specifically engineered for integration with vacuum-based analytical instruments including quadrupole and magnetic sector mass spectrometers, electron beam welders, ion implanters, and X-ray fluorescence (XRF) and computed tomography (CT) tube drivers. Its output characteristics meet critical requirements outlined in IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and IEC 61326-1 (EMC for Laboratory Equipment). The CE marking confirms conformity with the EU Low Voltage Directive (2014/35/EU) and Electromagnetic Compatibility Directive (2014/30/EU). For regulated environments—including GLP-compliant laboratories and ISO/IEC 17025-accredited testing facilities—the DF supports audit-ready operational logging when paired with Wiseman’s optional remote monitoring software, enabling traceable voltage/current history with timestamped event flags for fault conditions (e.g., arc detection, interlock break).

Software & Data Management

While the DF operates autonomously via local controls, its digital interfaces enable seamless integration into automated test systems. The standard Ethernet port supports Modbus TCP and SCPI-over-TCP protocols, allowing direct communication with LabVIEW, Python (PyVISA), MATLAB, or custom C++ applications. RS-232 provides fallback ASCII command support for legacy infrastructure. All control parameters—including voltage setpoint, current limit, ramp rate, and protection thresholds—are programmable and non-volatile. Real-time telemetry (output voltage, current, temperature, status bits) is streamed at configurable update rates (1–10 Hz default). Event logs—including timestamps for overvoltage trips, arc occurrences, and interlock disengagement—are stored onboard and exportable via FTP or HTTP GET. Optional firmware upgrade paths ensure long-term compatibility with evolving lab automation frameworks and cybersecurity requirements (e.g., TLS 1.2 for encrypted remote access).

Applications

• Mass spectrometry: High-stability bias supply for electron multipliers, detector dynodes, and ion optics lenses
• Electron and ion beam systems: Acceleration and focusing power for SEM, TEM, FIB, and ion implantation tools
• X-ray generation: Anode and cathode bias for microfocus and rotating anode X-ray tubes used in NDT and medical imaging R&D
• Particle accelerator subsystems: Cockcroft–Walton and Marx generator charging stages, electrostatic lens supplies
• Semiconductor manufacturing: Plasma source biasing, electrostatic chuck (ESC) control, and CVD/PVD chamber voltage conditioning
• Materials science instrumentation: Electron beam evaporation, laser-induced breakdown spectroscopy (LIBS) trigger bias, and dielectric withstand testers
• Research infrastructure: High-voltage test benches for insulator qualification, corona discharge studies, and electrohydrodynamic (EHD) flow actuation

FAQ

Is the DF series suitable for use in vacuum chambers or ultra-high vacuum (UHV) environments?
No—the DF is a rack-mounted external power supply intended for atmospheric operation only. HV output cables must be routed through appropriate feedthroughs; internal operation inside vacuum is not supported.

Can the DF be configured for bipolar (±kV) output?
The standard DF series provides unipolar positive or negative polarity output (user-selectable at time of order). True bipolar operation requires two synchronized DF units with floating ground architecture and external summing circuitry—consult Wiseman engineering for custom dual-channel solutions.

Does the DF support FDA 21 CFR Part 11-compliant electronic records and signatures?
While the DF itself does not embed Part 11 functionality, its logged data (via Ethernet) can be ingested into validated third-party LIMS or ELN platforms that provide audit trails, role-based access, and electronic signature workflows compliant with 21 CFR Part 11 and Annex 11.

What is the recommended maintenance interval and calibration schedule?
Annual verification against NIST-traceable HV standards is recommended. Output voltage accuracy is specified as ±1% of reading (4-digit panel meter); external calibration using a high-voltage divider and precision DMM satisfies ISO/IEC 17025 traceability requirements.

Are replacement HV cables and connectors available as spare parts?
Yes—standard 1 m oil-filled silicone-jacketed HV cables with SHV or MHV terminations are stocked. Custom lengths, shielding configurations, and vacuum-compatible variants (e.g., ceramic-insulated feedthroughs) are available upon request with lead times of 4–6 weeks.