HK-3070ZD Multi-Function Oscillation Analyzer

Overview

The HK-3070ZD Multi-Function Oscillation Analyzer is an engineered laboratory instrument designed for standardized gas extraction from insulating oil samples via controlled thermal oscillation—a critical preparatory step in dissolved gas analysis (DGA) for power transformer condition monitoring. Based on the principle of equilibrium partitioning, the analyzer subjects oil specimens to precise temperature-controlled agitation, facilitating quantitative transfer of dissolved gases (e.g., H₂, CH₄, C₂H₂, C₂H₄, C₂H₆, CO, CO₂) into the headspace for subsequent chromatographic detection. Its dual-purpose architecture supports both DGA-specific oscillation per GB/T 7601–1987 and general-purpose constant-temperature shaking applications—including solvent extraction, reagent homogenization, and sample equilibration—making it a versatile asset in electrical insulation laboratories, power generation QA/QC facilities, and third-party testing centers complying with IEC 60599 and IEEE C57.104 guidelines.

Key Features

• Microprocessor-controlled thermal oscillation system with real-time non-volatile clock and bilingual (Chinese/English) LCD interface—key operational prompts displayed in Chinese characters for localized usability without compromising international firmware compatibility.
• High-stability PID temperature regulation across ambient to 120 °C, delivering ±0.2 °C accuracy within the 0–60 °C range essential for reproducible DGA headspace equilibration, and ±0.3 °C precision up to 120 °C for accelerated extraction protocols.
• Consistent mechanical oscillation at 275 ±5 cycles per minute with fixed 35 mm horizontal amplitude—optimized to meet the mechanical energy input requirements specified in GB/T 7601–1987 and aligned with ASTM D3612 Type A methodology.
• Programmable timer (0–999 minutes) enabling unattended operation for extended equilibration periods, supporting method validation under GLP-compliant workflows.
• Rugged steel chassis with insulated chamber design ensures thermal uniformity and operator safety; meets CE-marked EMC and low-voltage directive requirements for laboratory equipment.

Sample Compatibility & Compliance

The HK-3070ZD accommodates standard 100 mL and 125 mL glass vials with septum-sealed caps, compatible with both manual and automated vial handling systems. It supports mineral oil, synthetic ester, and silicone-based insulating fluids per IEC 60296. Instrument performance adheres to national standards GB/T 7601–1987 (Method for Determination of Dissolved Gases in Transformer Oil) and GB/T 17625–1998 (Method for Determination of Water Content in Insulating Oil). While not certified to ISO/IEC 17025 as a standalone measurement device, its operational parameters are traceable to national metrological standards via NIM (National Institute of Metrology, China)–accredited calibration procedures. Routine verification follows internal SOPs aligned with ISO/IEC 17025 Clause 6.5 (Equipment Verification).

Software & Data Management

The HK-3070ZD operates as a stand-alone hardware platform with embedded firmware—no proprietary PC software required. All configuration parameters (setpoint temperature, oscillation duration, cycle count) are stored in non-volatile memory and retained during power interruption. Time-stamped operation logs (date/time of start/stop, setpoints used) are viewable on-device and exportable via optional RS-232 or USB-to-serial interface (available as accessory kit). For integrated LIMS environments, ASCII-formatted log outputs comply with ASTM E1382 data exchange conventions. Audit trail functionality satisfies basic FDA 21 CFR Part 11 requirements when paired with validated external logging software and user access controls.

Applications

• Dissolved gas analysis (DGA) sample preparation for power transformers, reactors, and bushings in utility and industrial substations.
• Moisture content determination in insulating oils per GB/T 7601–1987 and ASTM D1533.
• Standardized extraction of polar contaminants (e.g., furanic compounds) prior to HPLC analysis.
• Controlled-phase equilibration in environmental water/oil partition studies (e.g., K_ow estimation).
• Homogenization of viscous calibration standards for oil-in-water emulsion reference materials.

FAQ

Does the HK-3070ZD support automatic vial recognition or barcode scanning?
No. The instrument requires manual vial placement and parameter entry. Automation interfaces are not built-in but may be integrated externally via relay control signals.
Is temperature calibration traceable to NIST or other international standards?
Calibration certificates issued by authorized service providers reference NIM (China) standards, which maintain mutual recognition arrangements (MRA) with BIPM signatories. Full NIST-traceable calibration requires third-party lab engagement.
Can the oscillation amplitude be adjusted?
No. The 35 mm amplitude is mechanically fixed to ensure compliance with GB/T 7601–1987’s defined mechanical energy input profile.
What maintenance intervals are recommended?
Biannual verification of temperature sensor drift and oscillator motor torque is advised. Lubrication of drive linkage is required every 12 months under continuous operation.
Is the unit compatible with inert gas purging during oscillation?
Yes—vial caps accommodate septa with dual-port injection needles, allowing simultaneous headspace purging with N₂ or Ar while maintaining sealed equilibrium conditions.