The Infrared Systems Development Corporation IR-301 is a microprocessor-based PID temperature controller engineered to regulate blackbody radiating surfaces with exceptional stability. The controller employs five independent PID parameter groups, each optimized for specific temperature ranges and automatically selected based on setpoint, eliminating the need for continuous manual parameter adjustment. Dual redundant solid-state zero-voltage switching power relays, integrated RFI filters, and a precision thermocouple feedback loop with Cold Junction Compensation via high-precision RTD sensor ensure reliable long-term performance. The system samples cavity temperature 10 times per second with 0.1°C display resolution and achieves ±0.2°C calibration accuracy to NIST standards. Short-term stability maintains ±0.1°C, while long-term stability remains ±0.2°C. A dual-display format shows both blackbody temperature and setpoint on an interactive LCD menu, with a large bright LED display for primary temperature readout. All rear-mounted connections support standard rackmount integration.
## Technical Specifications
• Control Type: Microprocessor-based multi-set PID with five independent parameter groups; Standard Proportional Band with Automatic Reset and Derivative method
• Display Resolution: 0.1°C or 1°C (selectable)
• Accuracy: ±0.2°C (NIST calibration standard)
• Stability: ±0.1°C short-term; ±0.2°C long-term
• Sample Rate: 10 Hz digital cavity temperature update
• Temperature Sensors: Thermocouple alloys with high-precision RTD for Cold Junction Compensation
• Wavelength Range: 0.5–99 µm (cavity sources); 1–99 µm (extended area sources)
• Emissivity: >0.99 (cavity); 0.96 ±0.02 (extended area)
• Response Time: <20 minutes (extended area sources); <70 minutes (cavity sources)
## Key Features
• Dual redundant solid-state power relays with zero-voltage switching
• RFI filtering for electromagnetic immunity
• Automatic PID parameter selection across temperature ranges
• Two configurable alarm outputs; 5.0 A at 120 VAC, 2.5 A at 230 VAC contact rating
## Electrical Specifications
• Input: 105–125 VAC, 50–60 Hz, 500 W maximum (configurable for 220 V operation)
## Typical Applications
Blackbody source temperature regulation for infrared systems calibration and testing across extended temperature ranges.
