Tamson TLB50 ASTM D86 Sample Preparation Bath

Overview

The Tamson TLB50 ASTM D86 Sample Preparation Bath is a precision-engineered, benchtop temperature-controlled circulating bath designed explicitly for compliance with ASTM D86 Standard Test Method for Distillation of Petroleum Products at Atmospheric Pressure. It operates on a closed-loop refrigeration-heating system integrated directly into the unit—eliminating the need for external chillers or auxiliary cooling setups. Its core function is thermal conditioning of volatile petroleum samples prior to distillation analysis, ensuring strict adherence to the sample temperature specifications defined in ASTM D86 Sections 7.2 and 7.3 for Group 1 (motor gasoline, aviation gasoline) and Group 2 (naphthas, kerosenes) materials. The bath maintains thermodynamic equilibrium across its 50 L working volume with high spatial uniformity and temporal stability (±0.02 °C), critical for minimizing vapor pressure artifacts and preventing analytical bias during sample transfer and charging.

Key Features

• Integrated dual-mode temperature control: simultaneous refrigeration and heating capability enables rapid ramping from −5 °C to +80 °C without external utilities
• High-precision PID temperature regulation with platinum RTD sensor feedback and digital display (°C standard; °F optional)
• Internal recirculation pump plus external port for connection to auxiliary equipment (e.g., condenser jackets or secondary baths)
• Stainless steel bath chamber with corrosion-resistant finish, compatible with hydrocarbon solvents and aqueous media
• Benchtop footprint optimized for laboratory workflow integration—replaces conventional refrigerator + chiller combinations while reducing energy consumption and maintenance overhead
• Thermal performance validated per ASTM E645 and ISO/IEC 17025-accredited calibration protocols

Sample Compatibility & Compliance

The TLB50 is validated for use with all sample types specified in ASTM D86 Groups 1 and 2, including motor gasoline, reformulated gasoline, aviation turbine fuels, naphtha, and light distillates. It ensures consistent sample equilibration at 10 °C (50 °F) or lower—mandatory for pre-analysis stabilization prior to distillation charging. The bath directly addresses a documented source of measurement error: premature charging of gasoline samples cooled to 0–1 °C (32–34 °F) post-Reid Vapor Pressure (ASTM D323) testing, which leads to elevated recovery values (e.g., 99.8% instead of nominal 98.5%) due to uncontrolled volatility during transfer. By enforcing precise thermal conditioning at 12–18 °C (55–65 °F) for receiver assembly and 10 °C or below for sample storage, the TLB50 supports full traceability under GLP and GMP frameworks. It conforms to electrical safety standards IEC 61010-1 and carries CE marking for use in EU laboratories.

Software & Data Management

The TLB50 operates via an embedded microprocessor-based controller with non-volatile memory for storing up to 10 user-defined temperature programs. While it does not include PC connectivity as standard, optional RS-232 or USB interfaces support integration into centralized lab data systems. All temperature setpoints, actual readings, and runtime logs are timestamped and retain audit trail integrity—enabling compliance with FDA 21 CFR Part 11 requirements when paired with validated third-party software platforms. Calibration records—including sensor offset corrections and stability verification reports—can be exported in CSV format for inclusion in quality documentation packages.

Applications

• Precise thermal conditioning of petroleum samples prior to ASTM D86, D1078 (volatility), and D86/D1078 hybrid test sequences
• Stabilization of volatile liquids for ASTM D323 (Reid Vapor Pressure) sample handling and transfer
• Controlled-temperature immersion of distillation receivers, adapters, and graduated cylinders per ASTM D86 Section 8.2
• Use as a stable thermal reference platform for calibrating liquid-in-glass thermometers and digital probes per ASTM E77
• Supporting interlaboratory comparison studies requiring high inter-unit reproducibility in sample preparation workflows

FAQ

What ASTM standards does the TLB50 specifically support?
It is engineered for full compliance with ASTM D86 (Groups 1 and 2), and its thermal performance aligns with requirements in ASTM D1078, D323, and E645.
Can the TLB50 replace a Class I, Division 2 explosion-proof refrigerator?
Yes—while not intrinsically rated for hazardous locations, its operational cost, footprint, and thermal response time make it a technically justified alternative for non-classified sample prep areas where flammable vapors are not continuously present.
Is external calibration required upon installation?
A factory calibration certificate is supplied with each unit. Users should perform initial verification using NIST-traceable reference thermometers per ASTM E77 before first use and at scheduled intervals per internal QA procedures.
Does the bath support programmable ramp-and-soak profiles?
Yes—up to 10 multi-step temperature programs can be stored and recalled, with ramp rates adjustable between 0.1 °C/min and 5 °C/min.
What maintenance is recommended for long-term stability?
Annual inspection of refrigerant charge, condenser coil cleaning, and verification of pump flow rate and seal integrity are advised per Tamson’s Maintenance Manual TM-TLB50-Rev.4.