Brookfield TC-502D Refrigerated/Heated Circulating Water Bath

Overview

The Brookfield TC-502D is a precision refrigerated/heated circulating water bath engineered for rigorous laboratory temperature control applications. It operates on a closed-loop thermoregulation principle, utilizing a dual-mode compressor-based cooling system coupled with high-efficiency resistive heating elements and a calibrated platinum resistance thermometer (Pt100) for real-time feedback. This architecture enables stable thermal environments across an extended operational range—from cryogenic conditions at –45 °C up to high-temperature processing at +200 °C—making it suitable for viscosity calibration, dissolution testing, enzymatic reaction studies, material stability assessments, and ASTM D445/D7042 kinematic viscosity measurements requiring strict thermal compliance. Its circulation pump delivers consistent flow rates (adjustable up to 18 L/min) to external jackets, immersion coils, or analytical instrumentation, ensuring uniform heat transfer without localized thermal gradients.

Key Features

• Dual-mode refrigeration and heating system with independent PID control loops for rapid thermal response and minimal overshoot
• High-stability temperature regulation: ±0.05 °C standard; improved to ±0.01 °C when equipped with programmable controller firmware
• Two standard bath volumes available: 6 L (compact footprint) and 13 L (enhanced thermal mass for prolonged stability)
• Intuitive multilingual LCD interface supporting English, German, French, Spanish, and Chinese—configured via front-panel navigation
• Selectable temperature units (°C/°F), adjustable ramp rates, and hold-time programming for multi-step thermal protocols
• RS-232 and optional Ethernet connectivity enabling integration into centralized lab automation networks
• Over-temperature, low-fluid-level, and compressor fault protection circuits compliant with IEC 61010-1 safety standards

Sample Compatibility & Compliance

The TC-502D accommodates a broad spectrum of sample formats—including glassware (e.g., U-tube viscometers, dissolution vessels), metal reaction blocks, jacketed reactors, and external analytical modules (e.g., rheometers, spectrophotometers). Its stainless-steel bath chamber and corrosion-resistant circulation path support use with water, water/glycol mixtures, silicone oils, and other non-aggressive heat-transfer fluids rated for the full –45 °C to +200 °C range. The device meets ISO/IEC 17025 requirements for temperature-controlled equipment used in accredited testing laboratories and supports audit-ready operation under GLP and GMP frameworks. Optional 21 CFR Part 11–compliant software modules provide electronic signatures, user access levels, and immutable audit trails for regulated environments.

Software & Data Management

Brookfield’s proprietary PC-based software (v5.2+) enables full remote configuration, real-time monitoring, and automated data logging of temperature setpoints, actual bath readings, pump status, and alarm events. Time-stamped CSV exports are compatible with LIMS platforms and statistical process control (SPC) tools. The software supports scheduled thermal profiles—including ramp-hold-cool sequences—and allows synchronization with connected Brookfield instruments (e.g., DVNext rheometers, AMETEK viscometers) for synchronized environmental conditioning during measurement. All communication adheres to Modbus RTU protocol over RS-232, facilitating interoperability with third-party SCADA systems.

Applications

• Calibration of capillary and rotational viscometers per ASTM D445, ISO 3104, and ISO 2555
• Dissolution testing of pharmaceutical dosage forms in accordance with USP and FDA guidance
• Thermal aging studies of polymers, adhesives, and coatings per ASTM D3045 and ISO 2578
• Enzyme kinetics assays requiring precise incubation at sub-ambient or elevated temperatures
• Conditioning of reference standards (e.g., NIST-traceable viscosity oils) prior to metrological verification
• Supporting thermal equilibration in materials testing rigs, including tensile testers and dynamic mechanical analyzers

FAQ

What fluid types are compatible with the TC-502D bath?

Water, 30–50% aqueous glycol solutions, and silicone oils with flash points above 200 °C are approved. Avoid halogenated solvents, strong acids/bases, or fluids with vapor pressures exceeding 100 kPa at operating temperature.
Does the TC-502D support external temperature sensing?

Yes—it accepts input from optional Pt100 or thermocouple probes placed directly in the sample zone, enabling cascade control mode where bath output follows the external sensor reading.
Can multiple TC-502D units be controlled from a single PC?

Yes—via RS-232 daisy-chaining or Ethernet TCP/IP addressing, with each unit assigned a unique ID for individual parameter management and logging.
Is validation documentation provided?

Factory-installed IQ/OQ documentation packages—including as-found/as-left calibration reports, sensor traceability certificates (NIST-traceable), and installation checklists—are available upon request.
What maintenance intervals are recommended?

Compressor oil inspection every 24 months; coolant replacement every 12 months for glycol mixtures; annual verification of temperature accuracy using a certified reference thermometer per ISO/IEC 17025 Clause 6.5.