Junyi JY200C Electrophoresis Power Supply

Overview

The Junyi JY200C Electrophoresis Power Supply is a microprocessor-controlled, laboratory-grade DC power source engineered for precise and reproducible electrophoretic separation across diverse life science applications. Designed in accordance with fundamental electrophoresis principles—where charged biomolecules (e.g., proteins, nucleic acids) migrate through porous matrices under controlled electric fields—the JY200C delivers stable, programmable output to support horizontal slab gels, vertical SDS-PAGE systems, cellulose acetate membrane electrophoresis, and electroblotting (Western/Northern transfer). Its triple-mode regulation (constant voltage, constant current, or constant power) enables method-specific optimization: constant voltage ensures consistent field strength for uniform migration rates in standard protein gels; constant current maintains steady ion flux during prolonged runs; and constant power mode accommodates dynamic resistance changes—such as those occurring during gradient gel electrophoresis or temperature-sensitive separations.

Key Features

• Triple-output regulation architecture with real-time switching between constant voltage (5–200 V), constant current (1–2000 mA), and constant power (1–200 W) modes
• High-resolution digital control: 1 V voltage step, 1 mA current step, and 1 W power step for fine-tuned method development
• Backlit monochrome LCD display (128 × 64 pixels) showing simultaneous readouts of setpoint and actual output values
• Integrated timer with adjustable range from 1 minute to 99 hours and 59 minutes—suitable for overnight transfers and multi-stage protocols
• Durable one-piece molded chassis with tactile membrane keypad for reliable operation in shared lab environments
• Comprehensive safety suite: automatic shutdown on overload, open-circuit (no-load), and ground-fault detection; audible and visual fault indicators
• Non-volatile memory storing up to 10 user-defined electrophoresis methods—including voltage/current ramp profiles and timing sequences
• Auto-recall function restores last-used parameters upon power-up; auto-shutdown activates after timer completion or idle timeout

Sample Compatibility & Compliance

The JY200C is compatible with standard electrophoresis apparatuses used in academic, clinical, and quality control laboratories—including mini-PROTEAN®-compatible vertical tanks, Hoefer™ horizontal units, and custom-built blotting modules. It supports common gel matrices (polyacrylamide, agarose, cellulose acetate) and transfer membranes (PVDF, nitrocellulose). While not certified to IEC 61010-1 or UL 61010B as a standalone medical device, its electrical isolation, leakage current limits (<0.1 mA), and thermal management meet general-purpose laboratory equipment requirements per GB/T 14710 (Chinese national standard for environmental adaptability) and align with ISO/IEC 17025 preconditions for instrument qualification. For GLP/GMP-regulated workflows, users may implement supplementary validation protocols covering output accuracy, timer repeatability, and inter-unit consistency.

Software & Data Management

The JY200C operates as a stand-alone instrument without proprietary PC software. All configuration, execution, and monitoring occur via the front-panel interface. Parameter settings are retained in EEPROM with >100,000 write cycles, ensuring long-term method integrity. Though it lacks USB/Ethernet connectivity or FDA 21 CFR Part 11-compliant audit trails, its deterministic behavior—verified through periodic calibration using NIST-traceable multimeters—supports documented verification per internal SOPs. Users integrating the JY200C into regulated environments may log output verification data manually or via external data acquisition systems synchronized to timer events.

Applications

• SDS-PAGE and native PAGE of proteins (10–250 kDa range) under standardized conditions (e.g., 120 V for 60–90 min)
• Horizontal electrophoresis of serum proteins, hemoglobin variants, and isoenzymes on cellulose acetate or agarose
• Electroblotting for Western and Southern transfers, particularly where low-current, extended-duration protocols (e.g., 100 mA, 60 min) are required
• Method development for two-dimensional electrophoresis (2-DE) first-dimension IEF strips, leveraging constant voltage stability
• Teaching laboratories requiring robust, intuitive instrumentation for undergraduate biochemistry and molecular biology curricula

FAQ

Does the JY200C support programmable voltage ramping or multi-step protocols?
No—the JY200C executes single-stage protocols only. It does not support time-dependent parameter sequencing (e.g., voltage ramping), but stored methods retain fixed setpoints for rapid recall.
Can it be used with high-resistance gels such as low-percentage agarose or thick polyacrylamide slabs?
Yes—its constant power mode (1–200 W) dynamically adjusts voltage and current to maintain target wattage, preventing current drop in high-impedance systems.
Is the unit suitable for CE-marked or FDA-registered laboratories?
It carries no CE marking or FDA listing. Laboratories requiring regulatory compliance must perform site-specific risk assessment and operational qualification per ISO/IEC 17025 or relevant GxP guidelines.
What maintenance is required to ensure long-term output accuracy?
Annual verification using calibrated digital multimeters (voltage, current) is recommended. Clean ventilation grilles regularly; avoid obstructing rear airflow openings.
Are replacement fuses or service manuals available internationally?
Fuses (T3.15A/250V, 5 × 20 mm) are globally standardized. Technical documentation is provided in English and Chinese; firmware updates are not supported.