The Altek 322-1 Thermocouple Calibrator is a precision portable instrument for simulating and measuring thermocouple outputs in field and laboratory environments. It supports J, K, T, E thermocouple types plus millivolt sourcing, enabling technicians to calibrate temperature measurement devices and troubleshoot thermal loops with high accuracy and speed.
Technical Specifications
Output Performance
• Accuracy: ±(0.008% of Reading + 0.006 mV)
• Output Impedance: <0.1 ohms
• Source Current: Up to 8 mA (drives 80 mV into 10 ohms)
• Output Noise: 10 Megohms
• Normal Mode Rejection: 50/60 Hz, 50 dB
• Common Mode Rejection: 50/60 Hz, 120 dB
• Measurement Resolution: 0.1° or 1° (field selectable); 0.001 mV resolution
• Open Thermocouple Detection: 450 ms check pulse, 10 kΩ threshold
Environmental & Operating Conditions
• Operating Temperature: -20 to +60°C (-5 to +140°F)
• Storage Temperature: -30 to +80°C (-22 to +175°F)
• Relative Humidity: 10 to 90%, non-condensing
• Cold Junction Compensation: Built-in, characterized to T/C curve
• Cold Junction Temperature Effect: ≤0.05°C per °C ambient change
• Reference Drift: 10 MΩ) minimizes loading effects during measurement mode.
