Bently Nevada 330780-90-00 3300 XL 11 mm Proximitor Sensor

Description

3. Key Technical Specifications

• Manufacturer: Bently Nevada
• Model: 330780-90-00
• Product Type: 3300 XL 11 mm Proximitor® Sensor
• Technology: Eddy current non-contact displacement measurement
• System Length: 9.0 m (29.5 ft) total system length
• Mounting Option: Panel mount
• Probe Compatibility: 3300 XL 11 mm proximity probe system
• Output Sensitivity: 3.94 V/mm (100 mV/mil)
• Power Requirement: -17.5 VDC to -26 VDC, 12 mA maximum
• Output Resistance: 50 Ω
• Operating Temperature: Verify exact installed system limits; commonly listed sensor range is approximately -35°C to +85°C
• Agency Approval: -00 = No agency approval option required
• Typical Applications: Shaft vibration, radial displacement, position monitoring

4. Product Introduction

Bently Nevada 330780-90-00 is a 3300 XL 11 mm Proximitor® Sensor designed for rotating machinery monitoring systems. It works with compatible 11 mm proximity probes and extension cables to measure shaft displacement, vibration, and position in applications such as steam turbines, gas turbines, compressors, and large rotating equipment.

The 330780-90-00 configuration provides a 9.0 m system length with panel mounting and is used where a longer measurement system is required. Before replacement, verify the complete probe, extension cable, and sensor combination because Bently Nevada transducer systems are configured as matched assemblies.

330780-90-00

5. Installation & Configuration Guide

Stage 1: Pre-Installation Preparation (Estimated time: 15 minutes)

⚠️ Safety First

1. Notify operations before removing the vibration monitoring channel.
2. Confirm rotating equipment is in a safe shutdown condition.
3. Apply lockout/tagout procedures where required.
4. Remove power from the monitoring circuit before disconnecting wiring.

Tools Required

• ESD wrist strap
• Digital multimeter
• Screwdriver set
• Wire labels
• Smartphone/camera for documentation

Data Backup

1. Record existing Proximitor® sensor part number.
2. Photograph panel wiring and terminal connections.
3. Record connected probe and extension cable models.
4. Confirm existing 3300 XL system length.

Stage 2: Removing the Old Sensor (Estimated time: 10 minutes)

1. Open the monitoring cabinet panel.
2. Identify the installed Proximitor® sensor.
3. Label all field wiring before removal.
4. Disconnect wiring carefully.
5. Remove the old sensor from the panel mount location.
6. Inspect terminals and wiring condition.

⚠️ Note: Keep the old sensor until the replacement is fully commissioned.

Stage 3: Installing the New 330780-90-00 (Estimated time: 15 minutes)

1. Verify the replacement model:

   Bently Nevada 330780-90-00

2. Check:
   • Model label
   • Terminal condition
   • Housing condition
3. Install the sensor into the panel mount location.
4. Reconnect wiring according to the original documentation.
5. Confirm the connected probe and extension cable are 3300 XL 11 mm compatible.

Self-Checklist

• Correct sensor model confirmed
• 9.0 m system length verified
• Wiring matched original configuration
• Panel mounting secured
• Probe/cable compatibility confirmed

Stage 4: Power-On & Testing (Estimated time: 20 minutes)

Pre-Power Check

1. Verify supply polarity.
2. Check for wiring shorts.
3. Confirm probe circuit continuity.

Power-On Steps

1. Restore monitoring system power.
2. Check Proximitor® output signal.
3. Verify gap voltage.
4. Confirm vibration/displacement readings.
5. Compare values with historical operating data.

⚠️ Troubleshooting Note

If readings are incorrect:

• Confirm 11 mm probe compatibility.
• Verify the total system length is matched.
• Check supply voltage.
• Inspect connector and field wiring.

6. Frequently Asked Questions (FAQ)

Q1: What is the function of Bently Nevada 330780-90-00?

The 330780-90-00 is a 3300 XL 11 mm Proximitor® Sensor. It converts eddy current probe measurements into an output signal proportional to shaft displacement and vibration.

Q2: Can I replace it with a 3300 XL 8 mm Proximitor® Sensor?

No. The 11 mm system uses different probe characteristics and must match the installed probe and extension cable. Mixing 8 mm and 11 mm components can create incorrect measurements.

Q3: Is 330780-90-00 obsolete?

No. The 3300 XL 11 mm product family remains installed in many industrial machinery monitoring systems. Availability depends on supplier inventory and manufacturing support status.

Q4: What does 330780-90-00 mean?

Typical ordering breakdown:

• 330780: 3300 XL 11 mm Proximitor® Sensor
• 90: 9.0 m (29.5 ft) system length, panel mount
• 00: No agency approval option required

Q5: Is this a genuine new Bently Nevada sensor?

The supplier should clearly state the condition:

• New Original
• New Surplus
• Refurbished (tested)

For machinery protection equipment, request label photos, inspection records, and warranty information before installation.

Q6: Will changing the sensor require system recalibration?

A same-model replacement normally keeps the existing system configuration. However, verify gap voltage and monitoring values after installation because incorrect probe/cable/sensor matching can affect measurement accuracy.

Q7: What should be checked before ordering?

Confirm:

• Existing Proximitor® sensor model
• Probe diameter (11 mm)
• Extension cable length
• Mounting type
• Approval requirements

The complete transducer chain must match the installed Bently Nevada configuration.