Emerson PR6423 014-010 EPRO Eddy Current Sensor

Product Overview

A robust eddy current sensor arrives as the PR6423 014-010 from Emerson EPRO. This transducer features a splash-proof housing for hostile environment use. The PR6423 014-010 operates at temperatures up to 100°C without performance loss. Engineers use this sensor for vibration and position measurements on rotating machinery. Consequently, the PR6423 014-010 suits steam turbines, gas turbines, compressors, and pumps. The sensor comes with a 6-pole Harting connector for reliable signal transmission. Furthermore, the IP55 protection rating ensures resistance against dust and water jets.

Measurement Capabilities

The PR6423 014-010 measures vibration amplitude at its nominal mounting position. Maximum vibration amplitude reaches 3000 µm peak-peak for standard versions. For the PR 9268/01x-x00 variant, the limit is 500 µm peak-peak. Limit stops activate at 4000 µm peak-peak to prevent mechanical damage. Permissible acceleration in the measuring direction reaches 10 g peak-peak continuously. For short-time events, the sensor handles 20 g peak-peak without damage. Permissible acceleration in the transverse direction stays at 2 g peak-peak maximum.

Linearity error of sensitivity remains below 2% for accurate measurements. Frequency range spans from 4 Hz to 1000 Hz for broad application coverage. Natural frequency measures 4.5 Hz ±0.75 Hz at 20°C with 100 kΩ load. Thus, the PR6423 014-010 captures both low and high frequency vibrations effectively.

Sensitivity and Electrical Specifications

The PR6423 014-010 delivers consistent sensitivity across its operating range. Nominal sensitivity measures 28.5 mV/(mm/s) ±5% at 20°C and 80 Hz. This specification assumes a 100 kΩ load for proper measurement conditions. Resistance of the measuring circuit reaches 1875 Ω ±10% for signal conditioning. Insulation resistance exceeds 1 MΩ when tested at 500 V AC. Inductance stays below 90 mH for minimal signal distortion. Capacity against the housing, including cable without corrugated hose, stays under 1.2 nF.

Transverse sensitivity varies by mounting orientation for this sensor. For vertical mounting (PR 9268/20x-x00), transverse sensitivity measures 0.13 at 110 Hz. For horizontal mounting (PR 9268/30x-x00), transverse sensitivity measures 0.27 at 110 Hz. Thus, mounting orientation affects cross-axis rejection performance.

Damping Characteristics

The PR6423 014-010 exhibits temperature-dependent damping behavior. Damping factor measures 0.56 at 20°C with 100 kΩ load. At 100°C with the same load, the damping factor drops to 0.42. Therefore, the sensor’s response changes slightly with operating temperature. This characteristic remains within acceptable limits for most monitoring applications. The sensor still provides reliable measurements across its full temperature range.

Temperature Specifications

The PR6423 014-010 handles extreme temperatures for storage and operation. Storage and transport temperatures range from -40 to +100°C without packing materials. With packing, the acceptable range narrows to -40 to +70°C for transport. Operating temperature for the transducer without connector spans -20 to +100°C. For short periods under 4 hours, the sensor withstands up to 120°C. For the connector itself, the temperature range extends from -40 to +125°C. Thus, the PR6423 014-010 suits high-temperature machinery environments.

Measuring Direction Options

The PR6423 014-010 offers flexibility for installation orientation. Maximum deviation from nominal measuring direction depends on current sinking. Without sinking current, the sensor tolerates ±30° deviation from nominal. With sinking current, the acceptable deviation expands to ±60° maximum. PR 9268/20 sensors are designed specifically for vertical measurement orientation. The recommended maximum lifting current for deviated installation reaches 1.8 mA. This current applies for PR 9268/20 at 60° and PR 9268/30 at 30° deviation.

Cable and Connector Options

The PR6423 014-010 includes several cable configuration options. A=4 indicates a non-armored cable length of 3 meters. B00 specifies the cable end type as 000 or HARTING configuration. -XXX suffixes indicate additional options like OPR or RAD. OPR denotes oil-proof PTFE covered metal protection hose for harsh environments. RAD indicates suitability for use in radioactive environments. Thus, the PR6423 014-010 adapts to various application requirements.

The connector uses a 6-pole Harting plug design for secure connection. A matching 6-pole socket comes enclosed with the sensor. This connector system ensures reliable signal transmission even with vibration. Therefore, the PR6423 014-010 maintains connection integrity in dynamic machinery environments.

Physical Specifications

Installation Guidelines

When planning a measurement with the PR6423 014-010, follow these guidelines carefully.

1. Consider Environmental Conditions: Evaluate temperature, humidity, and aggressive substances first.

2. Use Stiff Sensor Holder: Always choose a vibration-free mounting bracket for stability.

3. Define Measuring Range: Select a range no larger than necessary for your application.

4. Consult Plant Operator: Define trip limits together with operational staff.

5. Account for Deviations: Include measurement deviations when setting trip limits.

6. Select Proper Sensor: Ensure the PR6423 014-010 meets your range requirements.

7. Ensure EMC Compliance: Use proper cables for electromagnetic compatibility.

8. Verify Function: Test the measurement before activating in production environment.

Important: Never exceed the permissible acceleration limits of 10 g continuous. Always use a stiff, vibration-free sensor holder for accurate measurements. The splash-proof housing protects against moisture, but avoid direct high-pressure water jets. Finally, ensure proper EMC-compatible installation including proper cable routing.

Key Features and Benefits

• Splash-Proof Housing: Permits use in hostile environments reliably.

• High Temperature Operation: Works continuously up to 100°C (120°C short time).

• Wide Frequency Range: Covers 4 Hz to 1000 Hz for comprehensive monitoring.

• Low Linearity Error: Stays below 2% for accurate measurements.

• IP55 Protection: Resists dust ingress and low-pressure water jets.

• Multiple Mounting Options: Accepts ±60° deviation with sinking current.

The PR6423 014-010 delivers reliable eddy current measurements for rotating machinery. Consequently, this sensor suits steam turbines, gas turbines, compressors, and pumps. Its frequency response covers 4 to 1000 Hz for comprehensive vibration analysis. The sensitivity of 28.5 mV/(mm/s) provides strong signals for monitoring systems. Environmental tolerance includes temperatures up to 100°C and IP55 ingress protection.

Package Contents

• One PR6423 014-010 eddy current sensor with 3m cable

• One 6-pole Harting plug (installed on cable)

• One 6-pole Harting socket (enclosed separately)

• One installation instruction sheet

Frequently Asked Questions (FAQ)

1. What is the maximum temperature for the PR6423 014-010?

The PR6423 014-010 operates continuously at temperatures from -20 to +100°C. For short periods under 4 hours, it withstands up to 120°C. The connector alone handles -40 to +125°C for additional flexibility.

2. Can the PR6423 014-010 be used in radioactive environments?

Yes, the PR6423 014-010 offers a RAD suffix option for radioactive environments. This version includes special materials resistant to radiation damage. Therefore, nuclear power plant applications suit this sensor appropriately.

3. What is the frequency range of this eddy current sensor?

The PR6423 014-010 measures frequencies from 4 Hz to 1000 Hz. This range covers most machinery vibration components including imbalance and misalignment. Natural frequency sits at 4.5 Hz, which determines the low-frequency limit.

4. How much deviation from nominal measuring direction is allowed?

Without sinking current, the PR6423 014-010 tolerates ±30° deviation from nominal. With sinking current of 1.8 mA, the tolerance expands to ±60° maximum. Thus, installation alignment does not require extreme precision.

5. What is the protection class of the PR6423 014-010?

The PR6423 014-010 carries an IP55 protection class rating. This means complete protection against dust ingress. It also protects against low-pressure water jets from any direction. Therefore, the sensor suits outdoor and wash-down environments effectively.