Wiseman DEF Series Portable High-Voltage Power Supply (70 kV / 350 W)
| Brand | Wiseman |
|---|---|
| Model | DEF |
| Output Voltage Range | 1–70 kV DC |
| Maximum Continuous Output Power | 350 W |
| Input Voltage | 86–265 VAC, 47–63 Hz |
| Power Factor | ≥0.99 (with active PFC) |
| Ripple | ≤0.1% RMS (≤20 kHz) |
| Voltage Stability | <25 ppm/8 h (after 2-h warm-up) |
| Temperature Coefficient | ≤25 ppm/°C |
| Output Polarity | Selectable Positive or Negative HV |
| Control Interfaces | Local front-panel potentiometer, Analog 0–10 V remote control, RS-232, RS-485, Ethernet (optional) |
| Protection Features | Overvoltage, Overcurrent, Arc Detection, Short-Circuit, Interlock |
| Dimensions (W×H×D) | 80 × 254 × 280 mm |
| Weight | 5.5 kg |
| Operating Temperature | 0–50 °C |
| Storage Temperature | −40–85 °C |
| Compliance | Designed for laboratory and industrial HV applications requiring IEC 61010-1 safety principles and electromagnetic compatibility per EN 61326-1 |
Overview
The Wiseman DEF Series is a compact, high-stability portable high-voltage (HV) power supply engineered for precision scientific instrumentation and industrial electrostatic applications. Utilizing advanced switched-mode topology with active power factor correction (PFC), the DEF delivers tightly regulated DC output voltages from 1 kV to 70 kV at up to 350 W continuous power. Its design emphasizes low output ripple (≤0.1% RMS below 20 kHz), exceptional long-term stability (<25 ppm over 8 hours after thermal stabilization), and minimal temperature drift (≤25 ppm/°C). The unit operates across universal AC input (86–265 VAC), enabling reliable deployment in diverse global laboratory environments without external voltage conversion. Unlike benchtop HV supplies with fixed form factors, the DEF’s modular chassis—measuring only 80 × 254 × 280 mm and weighing 5.5 kg—is purpose-built for integration into mobile test rigs, field-deployable analytical systems, and space-constrained experimental setups such as electron beam columns, electrospinning platforms, and portable X-ray source drivers.
Key Features
- Wide programmable output range: 1–70 kV DC, selectable polarity (positive or negative HV)
- High-power density: 350 W continuous output in a sub-6 kg portable enclosure
- Ultra-low ripple: ≤0.1% RMS (≤20 kHz); optimized for noise-sensitive detectors and beam-focused applications
- Thermally stabilized regulation: <25 ppm/8 h stability; temperature coefficient ≤25 ppm/°C (custom lower coefficients available)
- Dual-control architecture: Independent analog (0–10 V) and digital (RS-232/RS-485/Ethernet) interfaces for voltage and current setpoint modulation
- Comprehensive protection suite: Hardware-enforced overvoltage lockout, arc-sensing circuitry, short-circuit foldback, and safety interlock inputs compliant with IEC 61010-1 Class I requirements
- Front-panel and remote operation: Multi-turn potentiometers for local adjustment; DB15 connector provides analog monitoring (0–10 V) of actual V/I outputs for external data acquisition
- Robust mechanical design: Recessed HV output via insulated feedthrough; metal-shielded signal and power connectors for EMI resilience
Sample Compatibility & Compliance
The DEF series is routinely deployed in applications demanding stable, low-noise HV biasing where regulatory traceability and operational safety are critical. It supports electrostatic processes including electrophoretic deposition, corona charging, and ion mobility spectrometry—fields governed by ISO 13485 (for medical device manufacturing support) and ASTM F1717 (for electrostatic spray testing). While not certified to UL/CSA marks out-of-the-box, its architecture adheres to core safety principles of IEC 61010-1 (Edition 3), including reinforced insulation barriers, creepage/clearance spacing >10 mm/kV, and redundant overvoltage shutdown paths. For GLP/GMP-aligned laboratories, optional Ethernet interface enables audit-trail-capable remote control and logging when integrated with validated SCADA or LabVIEW-based acquisition systems supporting FDA 21 CFR Part 11 electronic record requirements.
Software & Data Management
The DEF supports protocol-agnostic digital control via ASCII command sets over RS-232, RS-485 (multi-drop capable), or TCP/IP Ethernet. Standard commands include VSET?, ISET?, VOUT?, IOUT?, ON/OFF, and status query STATUS?. All digital interfaces provide real-time readback of measured output parameters with 1% accuracy (4-digit LED display), and analog monitoring outputs (0–10 V) allow synchronization with oscilloscopes or DAQ systems sampling at ≥10 kS/s. Firmware includes non-volatile memory for storing user-defined presets and calibration offsets. When used with third-party software (e.g., Python pySerial, MATLAB Instrument Control Toolbox, or LabVIEW VISA drivers), the DEF enables automated voltage ramping, current-limited sweeps, and time-stamped fault logging—essential for reproducible materials characterization workflows.
Applications
- Electron and ion beam instrumentation: Biasing for SEM/TEM column components, mass spectrometer ion optics, and focused ion beam (FIB) sources
- Electrostatic processing: Electrospinning of nanofibers, electrostatic spraying for coating uniformity studies, and electrostatic flocking for textile R&D
- Radiation generation: Driving miniature X-ray tubes in portable NDT systems and laboratory-scale bremsstrahlung sources
- Materials testing: Insulation resistance validation, dielectric breakdown analysis, and accelerated aging of HV capacitors and cables
- Plasma and aerosol research: Charging electrodes for electrostatic precipitators, nanoparticle chargers (e.g., for SMPS calibration), and corona discharge reactors
- Academic and government labs: Compact HV source for particle accelerator injector stages, laser-triggered spark gaps, and pulsed power pre-charging circuits
FAQ
Is the DEF series suitable for use with electrophoresis systems?
Yes—the DEF is explicitly designed for electrophoresis instrument OEM integration and lab-grade gel electrophoresis systems requiring precise, low-ripple HV bias. Its 1–70 kV range covers standard capillary electrophoresis (CE), SDS-PAGE, and isoelectric focusing (IEF) configurations.
Can output polarity be reversed without hardware modification?
Yes—polarity selection is configurable via front-panel DIP switches or digital command, enabling rapid reconfiguration between positive and negative HV output without disassembly or external cabling changes.
What safety certifications does the DEF carry?
The DEF complies with fundamental safety and EMC requirements per IEC 61010-1 and EN 61326-1. CE marking is achievable upon customer-requested third-party testing; UL/CSA certification requires site-specific evaluation due to end-system integration dependencies.
How is thermal management handled in continuous 350 W operation?
The unit employs forced-air convection via a thermostatically controlled fan, with internal temperature sensors triggering derating above 45 °C ambient. Derated operation maintains <50 ppm/h stability up to 50 °C ambient.
Is firmware update capability supported?
Yes—firmware updates are performed via RS-232 using a vendor-provided utility; Ethernet-enabled units support TFTP-based remote updates in networked lab environments.
