Shenkai SKY2302-II Fully Automated Cold Filter Plugging Point (CFPP) Tester

Overview

The Shenkai SKY2302-II Fully Automated Cold Filter Plugging Point (CFPP) Tester is an engineered solution for precise, repeatable determination of the cold filter plugging point in diesel fuels, fatty acid methyl esters (FAME), and synthetic diesel blends. Based on standardized vacuum-driven filtration under controlled thermal descent, the instrument measures the lowest temperature at which a defined volume of fuel passes through a standardized wire mesh filter within 60 seconds under a specified vacuum—directly correlating to real-world operability in low-temperature diesel fuel systems. Designed for compliance with ASTM D6371, SH/T 0248, and IP 309, the SKY2302-II delivers traceable, auditable results essential for quality control laboratories, refinery testing centers, and fuel certification bodies operating under ISO/IEC 17025 or GMP-aligned workflows.

Key Features

• iSKvator™ automation architecture enables one-touch initiation of the entire test sequence—including sample aspiration, vacuum application, photometric liquid level monitoring, timed filtration assessment, and thermal ramping—eliminating manual intervention and operator-induced variability.
• Dual independent metal-bath test positions allow parallel or staggered analysis of two samples; each bath employs cascade compressor cooling for rapid, uniform thermal response from ambient to –67 °C with stability better than ±0.1 °C.
• High-resolution dual photodiode detection system precisely identifies upper and lower meniscus positions during filtration, ensuring accurate endpoint recognition per standard-defined criteria without physical contact or mechanical wear.
• Electronically regulated vacuum control maintains constant 2 kPa ±0.05 kPa throughout filtration, critical for reproducibility across viscosity gradients and compositional variations in modern biodiesel blends.
• 15.6-inch full-color capacitive touchscreen interface supports intuitive navigation, real-time graphical display of temperature vs. time profiles, and contextual status alerts for refrigeration, vacuum, and optical subsystems.
• Integrated self-diagnostic suite verifies operational integrity prior to each run—validating photodetector responsiveness, valve sequencing, temperature sensor calibration, and vacuum line integrity—to prevent invalid test cycles and reduce downtime.
• Automated post-test cleaning cycle includes solvent rinse, air purge, and thermal drying of the pipette assembly, minimizing carryover and enabling unattended overnight operation in high-throughput environments.

Sample Compatibility & Compliance

The SKY2302-II is validated for use with distillate fuels (e.g., EN 590, ASTM D975), FAME-based biodiesels (EN 14214, ASTM D6751), hydrotreated vegetable oils (HVO), and Fischer–Tropsch synthetic diesel. Its mechanical and thermal design conforms to the dimensional, flow-path, and vacuum specifications mandated by ASTM D6371 and SH/T 0248. The instrument’s firmware embeds method-specific logic for stepwise cooling rate selection (e.g., 1 °C/min down to –20 °C, then 3 °C/min thereafter), automatic hold times, and pass/fail evaluation per filtration duration thresholds. All test parameters—including setpoints, actual temperatures, vacuum values, and detection timestamps—are logged with millisecond resolution and immutable audit trails, supporting GLP and FDA 21 CFR Part 11 requirements when deployed with appropriate LIMS integration and user access controls.

Software & Data Management

Embedded firmware provides native data handling without external PC dependency. Each test record includes raw temperature/time arrays, vacuum pressure logs, photodetector signal traces, and final CFPP result with confidence indicators. The system stores ≥5000 complete test histories locally with searchable metadata (sample ID, operator, date/time, method version). Export options include CSV via USB or direct transmission over RJ-45 Ethernet to laboratory information management systems (LIMS) using standard TCP/IP protocols. Optional software modules support remote monitoring, scheduled calibration reminders, electronic signature capture, and PDF report generation compliant with ISO 17025 documentation standards.

Applications

This instrument serves as a core analytical tool in petroleum product development labs evaluating cold-flow improver (CFI) efficacy; in refinery QC for batch release of winter-grade diesel; in biofuel certification for EN 14214 compliance; and in third-party testing laboratories accredited to ISO/IEC 17025. It supports R&D investigations into wax crystallization kinetics, additive–fuel interactions, and feedstock-dependent low-temperature behavior. Its robust architecture ensures consistent performance in environments with ambient fluctuations between 5–35 °C and relative humidity ≤80 % RH, making it suitable for both fixed-site laboratories and mobile fuel testing units.

FAQ

What standards does the SKY2302-II fully support?
ASTM D6371, SH/T 0248, and IP 309 are natively implemented in method logic, including prescribed cooling rates, vacuum levels, and filtration timing criteria.
Can the instrument test multiple samples without operator intervention?
Yes—dual independent test positions enable unattended sequential or concurrent analysis, with automated cleaning between runs.
Is the temperature calibration traceable to national standards?
The Pt100 sensors are factory-calibrated against NIST-traceable references; optional annual verification kits and certificate services are available.
How is data integrity ensured for regulatory submissions?
All measurements are time-stamped, non-editable, and stored with full audit trail; electronic signatures and role-based access control can be enabled via LIMS integration.
Does the system require external refrigeration or coolant?
No—the integrated cascade compressor and metal bath eliminate dependence on external chillers, dry ice, or liquid nitrogen, reducing operational overhead and footprint.