Wiseman PMD30kV/20W High-Voltage Power Supply Module

Overview

The Wiseman PMD30kV/20W is a compact, high-stability, ultra-low-noise high-voltage (HV) DC power supply module engineered for precision scientific instrumentation requiring clean, regulated bias voltage in demanding analytical and detection applications. Based on a hybrid linear-switching architecture, the PMD series delivers exceptional voltage stability and minimal output perturbation—critical for electron-optical systems where microdischarge or ripple-induced signal drift degrades measurement fidelity. Its core design targets applications such as mass spectrometry detectors, CD-SEM column biasing, photomultiplier tube (PMT) dynode chains, and electrostatic lens arrays—where sub-millivolt ripple, ppm-level hour-to-hour stability, and robust electromagnetic shielding are non-negotiable. The module operates from a single 24 V DC input and integrates six-sided metal shielding to suppress radiated and conducted EMI, ensuring compatibility with sensitive low-current analog front-ends commonly found in analytical lab equipment.

Key Features

• Output voltage range: selectable up to 30 kV DC (standard models available at 1–30 kV in discrete steps); polarity configurable as positive or negative output
• Ultra-low output ripple: ≤3 mV_P-P typical (≤5 mV max) across full load and voltage range—achieved via optimized filtering and zero-current resonant regulation
• Long-term stability: 10 ppm/h, 20 ppm/8 h, and 100 ppm/1000 h—validated under constant thermal conditions per IEC 61000-4-30 guidelines
• Low temperature coefficient: 10 ppm/°C, enabling reliable operation across 0–50 °C ambient without recalibration
• Comprehensive protection suite: reverse-polarity input protection, overvoltage control-input safeguard, continuous overcurrent limiting, short-circuit latching, and arc-detection shutdown
• Digital control options: RS-232, RS-485 (with user-configurable node addressing), and optional Ethernet interface supporting Modbus TCP or custom ASCII protocols
• Compact mechanical footprint: 65.0 × 115.0 × 150.0 mm (H×W×D), 1.55 kg—designed for OEM integration into space-constrained instrument chassis
• OEM customization support: tailored voltage setpoints, mechanical mounting variants, connector types, and conformal coating for harsh environments

Sample Compatibility & Compliance

The PMD30kV/20W is routinely deployed in instruments requiring stable HV bias for charged-particle manipulation and signal amplification—including quadrupole and time-of-flight mass spectrometers (TOF-MS), scanning electron microscopes (SEM), secondary electron detectors, and radiation detection systems (e.g., proportional counters, G-M tubes, scintillation photodetectors). It meets essential electromagnetic compatibility requirements per EN 55032 Class B and EN 61000-6-3 for industrial environments. While not certified to FDA 21 CFR Part 11 out-of-the-box, its digital interfaces support audit-trail-capable control systems when integrated into validated instrument platforms adhering to ISO/IEC 17025 or ASTM E2500-21 frameworks. All units undergo 100% burn-in testing and high-potential (hipot) verification at 1.5× rated output voltage prior to shipment.

Software & Data Management

Wiseman provides a Windows-based configuration utility (PMD Control Suite) supporting real-time voltage monitoring, remote setpoint adjustment, and fault logging via USB-to-RS232 or native Ethernet connections. For RS-485 networks, up to 31 modules can be daisy-chained with individually assignable addresses—enabling centralized management in multi-channel detector arrays or multi-lens electrostatic systems. The protocol stack includes CRC-16 error checking and command timeout recovery to ensure deterministic behavior in mission-critical data acquisition workflows. Logged parameters—including output voltage, current, temperature, and fault status—are exportable in CSV format for traceability in GLP-compliant laboratories. Integration with LabVIEW™, Python (via PySerial/PyModbus), and MATLAB® is supported through documented ASCII and Modbus RTU/TCP command sets.

Applications

• Mass spectrometry: ion source biasing, detector dynode chain supply, reflectron acceleration grids
• Electron microscopy: beam blanking electrodes, objective lens bias, Faraday cup biasing
• Radiation detection: PMT high-voltage supply, proportional counter anode bias, scintillator photodiode biasing
• Electrophoresis & separation science: capillary electrophoresis electrode drivers, electroosmotic flow control
• Industrial metrology: electrostatic chuck biasing, ESD test fixture calibration, corona discharge sources
• Research infrastructure: particle accelerator beamline focusing elements, plasma diagnostics probes, laser-triggered vacuum gap switches

FAQ

What is the maximum continuous output power at 30 kV?
The PMD30kV/20W module delivers up to 20 W continuously at its rated 30 kV output—equivalent to 0.67 mA full-load current. Derating applies above 40 °C ambient per IEC 61347-2-13 thermal management specifications.
Can this module be used in a feedback-controlled loop with external voltage sensing?
Yes—the module supports analog voltage programming (0–10 V input) with 80 kΩ input impedance and <0.001% line/load regulation, enabling closed-loop stabilization when paired with external precision dividers and PID controllers.
Is firmware upgrade capability available over the communication interface?
Firmware updates require direct connection via dedicated programming header; field upgrades over RS-232/RS-485/Ethernet are not supported for safety-critical HV control integrity.
Does Wiseman provide calibration certificates traceable to NIST standards?
Calibration reports (including voltage accuracy, ripple, and stability measurements) are available upon request and are traceable to national metrology institutes via Wiseman’s ISO/IEC 17025-accredited internal calibration laboratory.
What is the mean time between failures (MTBF) under nominal operating conditions?
Based on Telcordia SR-332 Issue 4 methodology and accelerated life testing, the PMD30kV/20W exhibits an MTBF of >100,000 hours at 25 °C ambient and 70% load—consistent with Class H insulation system lifetime expectations.