KING CP610 Cloud Point and Pour Point Bath
| Brand | Tannas & King |
|---|---|
| Origin | USA |
| Model | CP610 |
| Temperature Range | –70 °C to +30 °C |
| Temperature Control Accuracy | ±0.1 °C |
| Cooling Capacity | 600 W at 0 °C, 300 W at –40 °C, 100 W at –70 °C |
| Cooling Rate | ~30 °C/h (average) |
| Sample Capacity | 4-position rotating bath |
| Bath Volume | 3.8 L |
| Dimensions | 42 × 53 × 66 cm |
| Weight | ~68 kg |
| Power Supply | 220 V, 10 A, 50/60 Hz, single-phase |
| Compliance | ASTM D97, ASTM D2500, ISO 3016, ISO 2084, IP 15, GB/T 6986, GB/T 3536 |
Overview
The KING CP610 Cloud Point and Pour Point Bath is a precision-engineered, manually operated thermal testing system designed for the standardized determination of cloud point (CP) and pour point (PP) in petroleum products—including diesel fuels, lubricating oils, jet fuels, and crude fractions. It operates on the fundamental principle of controlled thermal descent under defined atmospheric conditions, enabling visual or automated endpoint detection per internationally recognized test methods. Unlike fully automated systems—which remain non-compliant with ASTM D97 due to its requirement for manual observation—the CP610 delivers full method fidelity while offering superior thermal stability, repeatability, and operational transparency. Its independent two-stage cascade refrigeration system achieves a verified operating range from +30 °C down to –70 °C, with high-resolution digital temperature control (±0.1 °C) and programmable ramp-down profiles. The instrument is purpose-built for laboratories requiring strict adherence to ASTM, ISO, and IP standards without the complexity, cost, or validation overhead of robotic sample handlers.
Key Features
- Independent dual-stage cascade refrigeration system delivering stable, low-noise cooling across the full –70 °C to +30 °C range
- Precision digital temperature controller with real-time monitoring, ramp programming, and ±0.1 °C setpoint accuracy
- Four-position rotating sample bath (3.8 L total volume) with uniform thermal distribution and minimal gradient deviation (<0.3 °C across positions)
- Programmable cooling rate averaging –30 °C/h—optimized for ASTM D97 and D2500 thermal descent protocols
- Integrated safety architecture: high-temperature cutoff, low-bath-level sensor with automatic shutdown, overcurrent protection, and refrigerant pressure monitoring
- Robust stainless-steel construction with insulated chamber design minimizing ambient heat ingress and energy consumption
- Front-panel LED interface with intuitive navigation, data logging timestamping, and error-code diagnostics
Sample Compatibility & Compliance
The CP610 accommodates standard ASTM/ISO sample tubes (e.g., 35-mm OD × 130-mm length) and supports both cloud point (ASTM D2500, ISO 2084, IP 15) and pour point (ASTM D97, ISO 3016, GB/T 6986) determinations in a single platform. It meets all mechanical and thermal performance requirements specified in Annex A1 of ASTM D97 and Clause 6 of ISO 3016 for bath uniformity, cooling rate verification, and temperature stability. The system is routinely validated using NIST-traceable reference oils and certified thermometry (PT100 Class A sensors). While not a GMP-certified device per se, its deterministic thermal behavior, audit-ready parameter logs, and hardware-based safety interlocks support GLP-aligned operation and FDA 21 CFR Part 11–compatible data integrity when paired with validated LIMS integration.
Software & Data Management
The CP610 operates as a stand-alone benchtop instrument with embedded firmware—no external PC required for basic operation. All temperature setpoints, ramp profiles, run durations, and event timestamps are stored internally (non-volatile memory, 1000+ test records). Optional RS-232 or USB-to-serial interface enables connection to laboratory information management systems (LIMS) or custom data acquisition software for automated report generation, CSV export, and long-term trending. Calibration history, operator ID entry (via keypad), and failure-event logs are retained with time/date stamps—supporting traceability requirements under ISO/IEC 17025 and internal QA protocols.
Applications
- Determination of cloud point in middle distillates per ASTM D2500 and ISO 2084 for cold-flow operability assessment
- Pour point measurement of residual fuel oils and lubricants per ASTM D97 and ISO 3016 to evaluate low-temperature pumpability
- Quality control in refinery blending operations where rapid, repeatable low-temperature specification checks are critical
- Research and development of cold-flow improvers (CFIs) and wax inhibitors via comparative thermal profiling
- Third-party testing laboratories performing contract analyses compliant with API RP 45, ASTM D978, and EN 116
- Regulatory submissions requiring documented adherence to IP 15, GB/T 3536 (flash point correlation), and GB/T 6986
FAQ
Does the CP610 comply with ASTM D97 for pour point testing?
Yes—the CP610 satisfies all apparatus requirements in ASTM D97 Section 7, including bath geometry, cooling rate verification, thermometer calibration intervals, and visual observation protocol support.
Can it perform both cloud point and pour point tests without hardware modification?
Yes—identical bath configuration and temperature control logic serve both test methods; only sample tube type and observation criteria differ.
Is external calibration equipment required for routine use?
No—built-in PT100 sensor is factory-calibrated; users may verify accuracy using NIST-traceable reference thermometers per ASTM E77 or ISO 17025 procedures.
What maintenance is recommended for long-term reliability?
Annual inspection of refrigerant charge, condenser coil cleaning, and verification of bath fluid level and purity (use specified silicone oil per ASTM D97 Annex B).
Is the CP610 suitable for use in explosion-proof environments?
No—it is rated for general laboratory use (IEC 61010-1); hazardous location deployment requires third-party enclosure certification and is not supported out-of-box.
