The Sigma Systems C4 Thermal Platform Temperature Controller is a microprocessor-based instrument for precise temperature regulation of thermal platforms and environmental chambers. It delivers manual, remote, and programmed control modes with dual Platinum 500-ohm RTD probe inputs, selectable for control or measurement. The controller features 100-step multi-program capability with full edit functionality, zero crossover switching for RFI-free operation, and dual controlled device ports for refrigeration compressor and external load management.
Technical Specifications
• Temperature Sensors: Two Platinum 500-ohm RTD probes (selectable control or measurement)
• Programming: 100 temperature/duration program steps; multiple stored programs; step insert, delete, and loop-to-step-100 functionality
• Control Modes: Manual (front panel), remote (RS-232 or IEEE-488 GPIB), programmed multi-step sequences
• Temperature Display: Digital readout; Fahrenheit or Celsius operation
• Switching: Zero crossover for RFI elimination
• Power Outputs: Two controlled device ports for on/off relay control; optional solid-state relays available for line voltage switching
• Interfaces: RS-232 (firmware upgrade and remote control); IEEE-488 GPIB (TALKER/LISTENER, serial poll; extended addressing and parallel poll not supported)
• Weight: Approximately 24 lbs (without platform)
– Key Features
• Intelligent dual-probe control with probe averaging and software calibration correction
• Bumpless temperature transitions for load protection
• Ramp Timeout function enforces minimum acceptable temperature change rates
• Fail-safe architecture: PFS-2 digital failsafe (thumbswitch adjustable) and PA-1 piezo alarm
• Front panel compressor control toggle in manual mode
• Status LED indicators for operational state monitoring
• Enhanced noise and static immunity over legacy CC-3.5 models
• Improved temperature accuracy and stability
– Typical Applications
• Environmental chamber temperature control
• Thermal platform regulation for device testing
• Multi-zone temperature sequencing via programmed profiles
• Refrigeration cycle management with external load switching
– Compatibility & Integration
The C4 integrates directly with Sigma Systems thermal platforms and chambers. Its familiar user interface and front panel form factor match legacy products while incorporating modern microprocessor architecture and upgradeable firmware.
