Changji Instruments SYD-510G Low-Temperature Petroleum Testing Apparatus
| Brand | Changji Instruments |
|---|---|
| Origin | Shanghai, China |
| Model | SYD-510G |
| Power Consumption | ≤1700 W |
| Temperature Range | –70 °C to 0 °C |
| Temperature Control Accuracy | ±0.5 °C |
| Cooling Method | Compressor-based refrigeration |
| Bath Configuration | Dual-isothermal metal baths in single槽 chassis |
| Compliance Standards | SH/T 0248, GB/T 6986, GB/T 3535, GB/T 510 |
Overview
The Changji Instruments SYD-510G Low-Temperature Petroleum Testing Apparatus is a precision-engineered laboratory instrument designed to replicate standardized low-temperature environments required for evaluating critical thermal behavior of distillate fuels and lubricants. It operates on the principle of controlled bath immersion thermometry, where samples are immersed in a thermally stabilized metal cold bath maintained at user-defined setpoints between –70 °C and 0 °C. This apparatus supports four fundamental ASTM/ISO-aligned test methods—cloud point (GB/T 6986), pour point (GB/T 3535), freezing point (GB/T 510), and cold filter plugging point (CFPP) when integrated with the optional LC-2 vacuum filtration module per SH/T 0248. Its dual-isothermal bath architecture ensures uniform thermal distribution across both sample positions, minimizing inter-bath deviation and supporting concurrent or sequential multi-parameter evaluation under identical environmental conditions.
Key Features
- Compact desktop footprint with hinged flip-top cold bath enclosure for ergonomic access and reduced lab space demand
- High-efficiency eco-friendly compressor refrigeration system enabling stable operation down to –70 °C without liquid nitrogen or cryogenic consumables
- Digital PID temperature controller with real-time display, adjustable ramp rate, and ±0.5 °C accuracy over full range
- Robust aluminum alloy cold bath with enhanced thermal mass and surface uniformity for improved reproducibility across repeated cycles
- Integrated timing functions: manual countdown timer, automatic flip-cycle timer, and audible buzzer alert upon test completion
- Modular compatibility with Changji’s LC-2 Cold Filter Plugging Point (CFPP) Filtration Unit for SH/T 0248-compliant diesel and heating oil testing
Sample Compatibility & Compliance
The SYD-510G accommodates standard ASTM D2500 / ISO 20842 cloud point tubes, ASTM D97 / ISO 3016 pour point test jars, and GB/T 510 freezing point glassware. All bath geometry and immersion depth conform to dimensional requirements specified in SH/T 0248 Annex A, GB/T 6986 Clause 6, and GB/T 3535 Section 7. The instrument meets essential safety and electromagnetic compatibility requirements per GB 4793.1–2007 (equivalent to IEC 61010-1). While not certified for GMP/GLP-regulated production environments out-of-the-box, its digital control log, traceable temperature setpoints, and repeatable thermal profiles support audit-ready documentation when paired with external data logging systems compliant with FDA 21 CFR Part 11.
Software & Data Management
The SYD-510G operates via embedded firmware with no proprietary PC software dependency. Temperature setpoints, dwell times, and alarm thresholds are configured directly through the front-panel keypad and LCD interface. All operational parameters—including actual bath temperature, elapsed time, and status flags—are continuously displayed and retained in volatile memory during active use. For laboratories requiring electronic record retention, the unit provides an RS-232 serial port (optional cable available) enabling integration with third-party LIMS or SCADA platforms for timestamped temperature logging, remote start/stop commands, and automated report generation. No internal storage or user-accessible file system is included; data persistence relies on external host systems.
Applications
- Determination of cloud point in jet fuel, kerosene, and diesel blends per GB/T 6986 and ASTM D2500
- Pour point assessment of base oils, residual fuels, and marine distillates per GB/T 3535 and ASTM D97
- Freezing point measurement of aviation turbine fuels per GB/T 510 and ASTM D5901
- Cold Filter Plugging Point (CFPP) testing of diesel fuels using the LC-2 vacuum filtration accessory per SH/T 0248 and ISO 3015
- Method development and validation studies requiring precise, stable sub-zero thermal conditioning of petroleum samples
- Quality assurance workflows in refinery QC labs, independent testing facilities, and petrochemical R&D centers
FAQ
Does the SYD-510G require external cooling water or dry ice?
No. It uses an integrated air-cooled compressor system and operates independently of auxiliary chillers or cryogens.
Can it perform CFPP testing without additional hardware?
No. CFPP determination requires the LC-2 Cold Filter Plugging Point Filtration Unit, which connects externally via vacuum line and timing synchronization.
What is the typical stabilization time from ambient to –60 °C?
Approximately 90–120 minutes under standard lab conditions (25 °C ambient, no sample load); time varies with ambient humidity and ventilation.
Is calibration traceable to national standards?
The instrument includes a factory calibration certificate referencing ITS-90 traceable reference thermometers; users must perform periodic verification using NIST-traceable PRTs or certified reference fluids.
Are replacement cold bath inserts available for different tube geometries?
Yes—Changji offers optional bath adapters for ASTM D2500, D97, and SH/T 0248 configurations, sold separately under part numbers CB-SYD510G-CP, CB-SYD510G-PP, and CB-SYD510G-CFPP.
