The Scientific Atlanta 4180 and 4181-1 are precision infrared calibrators engineered for traceable calibration of point infrared thermometers and thermal imagers. Both models deliver laboratory-grade accuracy while maintaining field portability through dual-mode operation—bench-top and portable configurations. Temperature control leverages a digital controller with platinum RTD sensing; the 4180 uses FET-driven Peltier modules while the 4181 employs a solid-state relay triac heater. A continuous LCD display indicates current and set-point temperatures. Calibration traceability extends to NIST through radiometric calibration using an 8–14 µm IR thermometer referenced to blackbody cavity baths.
Technical Specifications
• Temperature Range: Model 4180: −15 °C to 120 °C; Model 4181: 35 °C to 500 °C
• Target Diameter: 152.4 mm (6 in)
• Nominal Emissivity: 0.95
• Emissivity Compensation Range: 0.9 to 1.0
• Heating Time: 15 min (−15 °C to 120 °C)
• Cooling Time: 15 min (120 °C to 23 °C)
• Stabilization Time: 10 min
• Power Input: 115 V ac (±10%); Fuse: T 6.3 A, 250 V
• Computer Interface: RS-232
• Weight: 9.1 kg (20 lb) or 8.6 kg (19 lb)
– Key Features
• Display accuracy spans ±0.40 °C at −15 °C to ±1.60 °C at 500 °C depending on model and temperature point
• Thermal stability of ±0.10 °C at −15 °C
• Emissivity compensation corrects for thermometer emissivity setting errors across 0.9–1.0 range
• Uniformity specification accommodates IR thermometers with varying spot sizes (5.0 in and 2.0 in diameter measurements at target center)
– Typical Applications
• Field and laboratory calibration of infrared thermometers
• Thermal imaging camera validation
• NIST-traceable IR sensor verification
– Compatibility & Integration
Operating environment: 5 °C to 35 °C ambient; ≤80% RH (below 31 °C), decreasing linearly to 50% at 40 °C; altitude <2000 m. Complies with IEC 61010-1 (Overvoltage Category II, Pollution Degree 2) and IEC 61326-1 (Basic Electromagnetic Environment).
