JULABO CD-200F General-Purpose Heating and Cooling Circulating Bath

Overview

The JULABO CD-200F is a compact, high-precision heating and cooling circulating bath engineered for demanding laboratory applications requiring stable thermal control across an extended temperature range—from −20 °C to +150 °C. Designed around a dual-stage thermal management architecture, it integrates a robust stainless-steel heating coil with an optimized R134a refrigeration circuit, enabling simultaneous heating and cooling without thermal overshoot or hysteresis. Its core control system employs PID1 algorithm augmented by ACC (Intelligent Cascade Control), dynamically adjusting compressor duty cycle and heater output in response to real-time thermal load variations—critical for applications involving exothermic reactions, solvent-based sample conditioning, or temperature-sensitive calibration protocols. The bath’s 4.5 L usable volume accommodates standard immersion vessels while maintaining rapid thermal equilibration (<15 min from −20 °C to 25 °C, typical). All internal wetted components—including the bath tank, circulation path, and heating coil—are constructed from electropolished AISI 316 stainless steel, ensuring long-term resistance to corrosion, scaling, and organic solvent degradation.

Key Features

• Precision temperature stability of ±0.03 °C across the full operating range, verified per DIN 12876-1 Class III (FL) requirements for flammable liquid compatibility.
• ATC (Absolute Temperature Calibration) function allows user-performed, traceable calibration at any point within the range—no external reference thermometer required.
• Adjustable immersion depth (7.5–16.5 cm) for temperature sensors ensures optimal placement relative to sample geometry and flow profile.
• Low-noise fan-cooled condenser with magnetic-access grille enables routine maintenance without tools; designed for continuous operation in shared lab environments.
• Pyramid-profile bath cover minimizes condensate loss and directs drips back into the reservoir, reducing fluid top-up frequency and vapor exposure.
• Integrated liquid-level float switch triggers audible/visual alarm and automatic power cutoff upon low-fluid condition—preventing dry-run damage and enhancing GLP compliance.
• Lockable IEC 60320 C14 power inlet with reinforced strain relief meets EN 61010-1 safety requirements for Class I equipment in regulated laboratories.
• USB port supports firmware updates and time-stamped data logging via JULABO’s optional LabView-compatible software suite.

Sample Compatibility & Compliance

The CD-200F is certified to DIN 12876-1 Class III (FL), permitting safe use with flammable liquids including ethanol, isopropanol, and silicone oils up to 150 °C. Its sealed circulation path, grounded stainless-steel construction, and intrinsically safe electrical design eliminate ignition risks during prolonged operation. The unit complies fully with EN 61010-1 (safety of electrical equipment for measurement, control, and laboratory use) and EN 61326-1 (EMC requirements for laboratory instruments). It satisfies essential requirements of the EU Machinery Directive 2006/42/EC and carries CE marking under the Low Voltage Directive. For GxP environments, its hardware-based overtemperature cut-off (independent of controller logic), non-volatile event logging, and ATC traceability support audit readiness under FDA 21 CFR Part 11 and ISO/IEC 17025 frameworks.

Software & Data Management

While the CD-200F operates autonomously via its front-panel LED interface, its USB port enables connection to Windows-based PCs running JULABO’s free PC-Link software. This application provides real-time monitoring of setpoint, actual temperature, pump status, and alarm history—with configurable sampling intervals down to 1 second. Logged data exports to CSV format for integration into LIMS or statistical process control (SPC) platforms. No proprietary drivers are required; the device appears as a CDC-compliant virtual COM port. Firmware updates preserve all user-calibration parameters and operational settings. For automated workflows, the USB interface supports SCPI-like command syntax (e.g., “TEMP?”, “SET 37.0”), facilitating integration into custom Python or LabVIEW test sequences without middleware.

Applications

• Calibration of thermometers, RTDs, and thermocouples per ASTM E74 and ISO 17025 requirements.
• Temperature conditioning of viscometers, densitometers, and refractometers prior to measurement.
• Stabilization of laser sources, photomultiplier tubes, and optical detectors sensitive to thermal drift.
• Controlled-rate heating/cooling of reaction mixtures in glass-jacketed reactors (compatible with M16×1 external loop connections).
• Long-duration stability testing of pharmaceutical formulations under ICH Q1A(R3) accelerated conditions.
• Thermal cycling of electronic components during reliability screening (−20 °C ↔ +85 °C, ramp rate ≤1 °C/min).

FAQ

What fluids are compatible with the CD-200F bath?

Water, water-glycol mixtures, silicone oils, and alcohols (e.g., ethanol, isopropanol) are approved—provided viscosity remains ≤50 cSt at operating temperature. Avoid chlorinated solvents and strong oxidizers.
Does the CD-200F support external temperature feedback control?

No—the CD-200F operates in bath-temperature mode only. For sample-temperature control, consider the DYNEO DD series, which accepts external PT100 input.
Is the USB interface capable of remote start/stop commands?

Yes—via ASCII serial commands over USB CDC, including ON/OFF, SET temperature, and QUERY status. Full command list available in the Technical Manual Rev. 4.2.
How often should ATC calibration be performed?

Annually under normal use; before critical calibrations; or after mechanical shock or prolonged operation outside ambient specifications (5–40 °C).
Can the bath operate continuously at 150 °C?

Yes—thermal insulation, condenser airflow, and compressor duty-cycle management are rated for indefinite operation at maximum temperature when ambient does not exceed 30 °C.