Junyi JY300HE Electrophoresis Power Supply
| Brand | Junyi |
|---|---|
| Origin | Beijing, China |
| Model | JY300HE |
| Output Modes | Constant Voltage / Constant Current / Constant Power |
| Voltage Range | 10–300 V (1 V resolution) |
| Current Range | 1–1500 mA (1 mA resolution) |
| Power Range | 1–450 W (1 W resolution) |
| Timer Range | 1 min – 99 h 59 min |
| Volt-Hour Range | 1–99999 V·h (1 V·h increment) |
| Display | Backlit LCD |
| Output Ports | 4 independent pairs |
| Dimensions (L×W×H) | 280 × 237 × 118 mm |
| Net Weight | 3.2 kg |
| Protection Features | Overload, No-Load, Leakage Detection, Short-Circuit, Thermal Shutdown |
| Memory Capacity | 100 pre-programmed methods |
| Control Architecture | Dual-core microprocessor with real-time feedback loop |
| Operating Modes | Standard, Timed, Volt-Hour, Stepwise (up to 10 sequential programs, each with up to 10 steps) |
| Pause & Fine-Tune Functionality | Real-time parameter adjustment during pause without drift or stability loss |
Overview
The Junyi JY300HE Electrophoresis Power Supply is a precision-engineered benchtop power source designed for reproducible and stable electrophoretic separation across diverse gel formats—including horizontal agarose, vertical polyacrylamide, cellulose acetate membrane, and Western/Northern blot transfer systems. It operates on the fundamental principle of controlled direct current (DC) delivery to maintain consistent electric field strength across electrophoresis chambers, enabling predictable migration kinetics of nucleic acids and proteins under defined voltage, current, or power setpoints. Its dual-core microprocessor architecture continuously monitors output parameters in real time, dynamically adjusting internal regulation to compensate for resistance fluctuations caused by buffer depletion, gel heating, or electrode polarization—ensuring high inter-run repeatability essential for quantitative molecular analysis in academic research, clinical diagnostics, and QC laboratories.
Key Features
- Triple-mode output control: independently selectable constant voltage (CV), constant current (CC), or constant power (CP) operation—each with full-range adjustability and digital resolution (1 V, 1 mA, 1 W).
- Advanced stepwise programming: supports up to 10 multi-step protocols, each comprising up to 10 discrete parameter sets (e.g., initial denaturation at 100 V for 5 min, followed by resolution at 180 V for 45 min, then cooling phase at 60 V for 10 min)—ideal for complex gradient or staged electrophoresis workflows.
- Real-time pause & fine-tune functionality: allows interruption of active runs with instantaneous parameter modification (e.g., voltage reduction during overheating) while preserving baseline stability; no recalibration or drift occurs upon resumption.
- Comprehensive safety architecture: integrated protection against overload, open-circuit (no-load), leakage current (>10 mA threshold), short circuit, and thermal runaway—compliant with IEC 61010-1 safety requirements for laboratory electrical equipment.
- High-fidelity user interface: backlit LCD displays both target and real-time measured values simultaneously; intuitive touch-sensitive keys reduce operational errors and accelerate method setup.
- Non-volatile memory storage: retains 100 user-defined electrophoresis methods with timestamped metadata; all settings persist after power cycling without battery backup dependency.
Sample Compatibility & Compliance
The JY300HE is compatible with standard electrophoresis tanks from major manufacturers (e.g., Bio-Rad, Thermo Fisher, Cleaver Scientific) and supports common gel matrices including 0.5–3% agarose, 8–20% SDS-PAGE, native PAGE, and capillary electrophoresis modules when paired with appropriate adapters. It meets electromagnetic compatibility (EMC) requirements per EN 61326-1 for laboratory use and conforms to electrical safety standards IEC 61010-1:2010 + A1:2019. While not certified for GMP-regulated production environments, its audit-trail-capable method logging, parameter locking, and error-code reporting support GLP-aligned documentation practices in academic and preclinical research settings.
Software & Data Management
The JY300HE operates as a standalone instrument with embedded firmware—no external PC connection or proprietary software required. All method configurations, runtime logs, and fault events are stored locally in non-volatile memory. Timestamped execution records include start/stop times, cumulative volt-hours, peak current draw, and triggered protection events—exportable via manual transcription or optional RS-232 interface (firmware-upgradable). The system supports 21 CFR Part 11–compatible workflow design through password-protected method editing, operator ID tagging (via alphanumeric label input), and immutable event logging—facilitating traceability in regulated research environments.
Applications
- DNA fragment analysis (agarose gel electrophoresis for PCR product verification, restriction digest profiling, and plasmid isolation QC)
- Protein characterization (SDS-PAGE, native PAGE, and 2D electrophoresis for molecular weight estimation and post-translational modification screening)
- Nucleic acid purification validation (gel extraction yield assessment and integrity checks prior to sequencing or cloning)
- Western blot transfer optimization (controlled constant-current transfer to ensure uniform protein immobilization on PVDF or nitrocellulose membranes)
- Teaching laboratory instruction (robust, intuitive interface enables rapid student training in core electrophoresis principles without software dependency)
FAQ
Can the JY300HE power multiple electrophoresis tanks simultaneously?
Yes—its four independent output port pairs allow concurrent operation of up to four separate electrophoresis units, provided total load remains within 450 W and per-channel current does not exceed 1500 mA.
Does it support timed shutdown after completion of a run?
Yes—the built-in timer automatically terminates output upon reaching the preset duration and triggers audible/visual alert; optional auto-restart is not supported.
Is calibration required before first use or periodically?
No routine calibration is needed; factory calibration is traceable to national metrology standards, and output accuracy remains within ±2% of setpoint across the full operating range over the specified service life.
What types of electrophoresis buffers are compatible?
Standard TAE, TBE, and SDS-PAGE running buffers are fully supported; avoid high-salt or strongly oxidizing formulations that may accelerate electrode corrosion.
How is data integrity maintained during power interruption?
All method definitions and execution logs are stored in write-protected flash memory; transient outages do not erase stored data or reset configuration parameters.
