Description
GE IC200ALG320 Technical Specifications:
- Input Type: Thermocouple (J, K, T, E, N, R, S, B, C).
- Channels: 8 single-ended, isolated inputs.
- Resolution: 14-bit.
- CJC Accuracy: ±1.0°C.
- Update Rate: 100 ms for all 8 channels.
Functional Features:
- Auto-Scaling: Software-selectable thermocouple types with automatic engineering unit conversion.
- Open Wire Detection: Detects broken thermocouple wires and reports a specific fault code.
- CJC Integration: Internal temperature sensor accurately compensates for ambient temperature changes at the terminal block.
- Filtering: Programmable digital filters to reduce electrical noise in harsh environments.
Application Scenarios:
- Furnace and boiler temperature monitoring.
- Exhaust gas temperature measurement in engines and turbines.
- Plastic molding and extrusion temperature control.
Performance Parameters:
- Accuracy: ±0.1% of reading + 1°C.
- Input Impedance: > 10 Megohms.
Material Composition & Structural Characteristics:
- Terminals: Nickel-plated brass terminals to ensure reliable connection with dissimilar thermocouple wire metals.
- Thermal Isolation: Physical barrier between the PCB and terminal block to minimize heat transfer to the CJC sensor.
Working Principle: The low-level millivolt signals from the thermocouples are amplified by ultra-low-noise instrumentation amplifiers. The module measures the temperature at the terminal block (cold junction) and adds the corresponding thermoelectric voltage to the measured signal. The total voltage is converted to digital and translated to temperature using standard NIST polynomial tables.
Installation Requirements:
- Wiring: Use properly matched thermocouple extension wire. Do not use copper wire for thermocouple connections.
- Shielding: Shielded cable is mandatory; ground the shield at the module terminal only.
Usage Precautions:
- Polarity: Strictly observe thermocouple polarity; reversed wires will cause readings to decrease with increasing temperature.
- Grounded Junctions: Avoid using grounded thermocouples in systems with significant ground potential differences to prevent measurement errors.
