Changji Instruments SYD-508 Petroleum Products Ash Content Tester

Overview

The Changji Instruments SYD-508 Petroleum Products Ash Content Tester is a dedicated laboratory instrument engineered for precise determination of ash content in petroleum products—such as lubricating oils, fuel oils, and residual fuels—in strict accordance with the Chinese national standard GB/T 508, which aligns methodologically with ASTM D482 and ISO 6245. The instrument operates on the principle of controlled high-temperature incineration: samples are combusted in a muffle furnace under defined thermal conditions to oxidize organic matter, leaving behind non-volatile inorganic residue (ash), which is then gravimetrically quantified. Its design emphasizes thermal stability, repeatability, and compliance-ready operation for quality control laboratories in refineries, independent testing facilities, and R&D centers handling hydrocarbon-based materials.

Key Features

• Integrated muffle furnace system with monolithic refractory chamber and optimized heating element layout—ensures rapid thermal response and extended service life under repeated cyclic operation.
• Digital temperature controller with adjustable setpoint and minimal overshoot (<±25 °C tolerance at 775 °C operating point), supporting stable dwell-time execution required by GB/T 508 protocols.
• Compact footprint (furnace + control console + electric hot plate) minimizes bench space requirements without compromising structural rigidity or thermal isolation.
• Electric hot plate (Φ85 mm) with six-step power regulation enables pre-charring of samples prior to furnace insertion—critical for preventing splattering and ensuring complete combustion per standard procedure.
• Robust cold-rolled steel enclosure with precision-stamped chassis enhances mechanical durability and thermal shielding; all external surfaces remain below 60 °C during continuous operation.

Sample Compatibility & Compliance

The SYD-508 accommodates standard porcelain crucibles (typically 15–30 mL capacity) used in ash determinations across liquid and semi-solid petroleum derivatives. It supports sample masses ranging from 5 g to 10 g, consistent with GB/T 508’s specified loading range. While not certified to IEC 61000 or CE for direct EU market deployment, its operational parameters—including furnace uniformity (≤15 °C), temperature stability (±1 °C over 30-min dwell), and electrical safety design—meet baseline requirements for GLP-aligned laboratory environments. When operated within documented SOPs, data generated using this instrument satisfies internal QC reporting, third-party certification submissions, and regulatory audits referencing ASTM D482, ISO 6245, or GB/T 508 test methods.

Software & Data Management

The SYD-508 operates as a hardware-only platform with no embedded microprocessor or digital interface. Temperature setpoints, ramp profiles, and dwell durations are manually configured via front-panel controls on the digital temperature controller. All process documentation—including operator ID, sample ID, start/end timestamps, furnace setpoint, actual recorded peak temperature, and final ash mass—is maintained externally in laboratory notebooks or LIMS-integrated spreadsheets. For labs requiring electronic audit trails, integration with compliant data acquisition systems (e.g., LabArchives, Thermo Fisher SampleManager) is achievable via external thermocouple signal logging (K-type output available upon request). The unit supports 21 CFR Part 11 readiness when paired with validated electronic recordkeeping workflows.

Applications

• Quality assurance of base oils and finished lubricants prior to packaging.
• Monitoring catalyst residue levels in cracked feedstocks and hydrotreated distillates.
• Verification of additive package stability during accelerated oxidation testing.
• Regulatory conformance testing for marine fuel (ISO 8217) and aviation turbine fuel (ASTM D1655) ash limits.
• Research-scale evaluation of ash-forming contaminants in bio-derived hydrocarbons and synthetic esters.

FAQ

Does the SYD-508 comply with ASTM D482?
Yes—the thermal profile, crucible specifications, and procedural sequence are functionally equivalent to ASTM D482; however, formal ASTM certification requires third-party verification of individual unit performance.
Can the furnace be calibrated traceably to NIST standards?
Yes—using a calibrated reference thermocouple and portable dry-block calibrator, users may perform in-house calibration checks aligned with ISO/IEC 17025 requirements.
Is the electric hot plate compatible with platinum crucibles?
No—platinum crucibles require uniform radiant heating; the SYD-508’s resistive hot plate is intended for porcelain or silica crucibles only.
What maintenance intervals are recommended?
Furnace insulation integrity should be verified quarterly; heating elements inspected annually; and temperature controller recalibrated every six months or after 200 operational cycles.
Can the instrument operate continuously for extended ash testing batches?
Yes—designed for 8-hour daily duty cycles with ≥30-minute cooldown between runs; ambient airflow clearance of ≥15 cm on all sides is mandatory for thermal management.