The VMIC VMIVME-3418 is a high-precision RTD isolation signal conditioning VME board designed for industrial temperature measurement applications. As part of VMIC’s VMEbus product line, this module provides exceptional noise immunity and signal integrity for platinum RTD sensors (PT100/PT1000) in harsh industrial environments. The VMIVME-3418 features 8-channel differential input with 24-bit resolution, delivering ±0.1°C accuracy across the full -200°C to +850°C measurement range.
Engineered for critical process monitoring, the VMIVME-3418 incorporates galvanic isolation (1500VAC) and advanced EMI filtering to ensure reliable operation in electrically noisy plants. Its modular design allows seamless integration with existing VME64x systems for distributed temperature monitoring.
Technical Specifications
Parameter Name | Parameter Value |
---|---|
Model | VMIVME-3418 |
Manufacturer | VMIC (GE Subsidiary) |
Type | RTD Isolation Signal Conditioner |
Input Channels | 8 (differential) |
Sensor Types | PT100/PT1000 (2/3/4-wire) |
Measurement Range | -200°C to +850°C |
Accuracy | ±0.1°C @ 0°C |
Resolution | 24-bit ADC |
Isolation Voltage | 1500VAC (channel-to-bus) |
Excitation Current | 0.5mA (programmable) |
Update Rate | 10 samples/sec (total) |
Interface | VME64x (A24/D16) |
Operating Temp | -40°C to +85°C |
Power Supply | +5VDC ±5% |
Key Features and Advantages:
Measurement precision: The VMIVME-3418 achieves laboratory-grade accuracy with automatic lead resistance compensation. Its proprietary algorithms correct for nonlinearity in platinum RTDs.
Robust design: Conformal coating and MIL-STD-202G vibration resistance ensure reliability in heavy industry. Hot-swappable design minimizes downtime during maintenance.
Flexible configuration: Software-selectable wire modes (2/3/4-wire) and user-defined scaling coefficients. Onboard memory stores calibration data.
Application Areas:
- Oil & Gas: Pipeline temperature monitoring
- Power Generation: Turbine bearing temperature
- Chemical Processing: Reactor vessel monitoring
- Food Production: Pasteurization control
In pharmaceutical cleanrooms, the VMIVME-3418 provides FDA-compliant temperature documentation.
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Installation and Maintenance:
Installation preparation: Verify VME backplane compatibility and RTD wiring configuration before installing VMIVME-3418. Use shielded twisted-pair cables for sensor connections.
Maintenance recommendations: Perform annual calibration verification using NIST-traceable standards. Check terminal tightness biannually (0.5-0.6Nm torque).
Product Assurance:
VMIC provides 12-month warranty with ISO 17025 accredited calibration services for VMIVME-3418. Each unit undergoes 300-hour burn-in testing including thermal cycling.
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