CON021/916-200+PR6426/000-130 | Emerson Epro | Eddy Current Signal Converter

System Overview

This measurement chain is a specialized configuration of the MMS 6000/3000 series. It combines the CON021 converter with the PR6426 high-temperature probe. This specific set is calibrated for a 20-meter total system length, allowing the converter to be mounted in a remote, low-vibration environment while the sensor operates in the "hot zone" of a turbine or compressor.

Component 1: CON021/916-200 Signal Converter

The CON021/916-200 is the driver/transmitter calibrated for an exceptionally long cable run.

• Model: CON021/916-200
• System Calibration: Exactly 20.0 meters (Total of probe cable + extension cable).
• Function: Oscillator/Demodulator that generates the high-frequency carrier for the probe and conditions the return signal.
  
• Output Range: Standardized analog voltage, typically 0 to -20 VDC.
• Housing: Shielded aluminum for DIN-rail mounting.

Component 2: PR6426/000-130 Displacement Sensor

The PR6426 is the "Heavy Duty" variant of the Epro displacement sensors, designed for the most demanding industrial environments.

• Model: PR6426/000-130
• Tip Diameter: 8 mm.
• Measuring Range: Approximately 2.0 mm (Nominal).
• Integral Cable (000): This usually denotes a standard short integral lead (often 1.0m) or a specific connector-only configuration depending on the sub-revision.
• Protection (130): The "130" suffix typically indicates a stainless steel flexible armored conduit with high-temperature FEP/PFA insulation and specific terminal endings.
• Environmental Limits: The PR6426 series can withstand temperatures up to 180°C and pressures up to 50 bar, making it suitable for mounting inside high-pressure bearing housings.
  

Key Performance Characteristics

• Remote Monitoring Capability: The 20-meter calibration (916-200) is critical for large machinery where the distance from the sensor to the local junction box or Marshalling cabinet is significant.
• Sensitivity: Typically 8 V/mm (200 mV/mil) when matched with the 20m driver.
• High-Temperature Stability: The PR6426 is engineered to minimize "thermal drift," ensuring that the displacement reading remains accurate even as the turbine warms up to operating temperature.
• Linearity: Maintains a linear output between approximately -2 VDC and -18 VDC of the signal range.