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The Newport 325B Temperature Controller precisely controls the temperature of a thermo-electric (TE) cooler in a closed loop system using a variety of possible temperature sensors as the feedback. Three operating modes are user selectable: constant R (thermistor), constant T (IC sensors), or constant ITE (TE cooler), while delivering high output power. Specifications. Output Type: Bipolar, constant current source. TEC Control Loop Type: Hybrid P-I-D. Maximum Current: ±2.5 A. Compliance Voltage: 7 V. Available Output Power: 17.5 W. Accuracy: ±5 mA. Resolution: 0.042 mA. Ripple/Noise (rms): <0.03 mA. Current Limit Range: 0 to 2.52 A. Resolution: ±5 mA. Accuracy: 0.042 mA. Short-Term Stability (1 h): 0.001°C. Long-Term Stability (24 h): 0.005°C. Display Range Temperature (°C): -50.0 to +150.0°C. Display Range Resistance (10 µA): 0.1 to 200.0 k-ohm. Display Range Resistance (100 µA): 0.01 to 20.00 k-ohm. Display Range TE Current: -2.50 to +2.50 A. Resolution Temperature: 0.1°C. Resolution Resistance (10 µA): 100 ohm. Resolution Resistance: (100 µA): 10 ohm. Resolution TE Current: 10 mA. Accuracy Temperature: ±0.1°C. Accuracy Resistance (10 µA): ±100 ohm. Accuracy Resistance (100 µA): ±10 ohm. Accuracy TE Current: ±10.
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