Bentley 330100-50-05 Detailed Product Description

I. Product Overview

The Bentley 330100-50-05 is an 8mm eddy current preamplifier (Proximitor Sensor) of the 3300 XL series from Bently Nevada under Baker Hughes. It is the core signal conditioning unit of the 3300 XL eddy current sensor system, designed in accordance with API 670 standards. It is used for non-contact monitoring of rotational machinery shaft vibration, axial displacement, eccentricity, and keyway signals, and is suitable for key equipment in industries such as power, petrochemical, and metallurgy, including steam turbines, compressors, and generators. The total cable length of this model system is 5.0 meters. It has multiple international certifications and is suitable for general industrial areas and some explosion-proof zones. It is a short-cable version of 330100-90-05 and has now been upgraded to the new model 330180-50-05.

II. Model Decoding

330100: Basic model, representing the standard preamplifier of the 3300 XL series, suitable for 8mm eddy current probe systems;

50: Total cable length of the system (probe + extension cable) is 5.0 meters, suitable for medium to short-distance wiring scenarios;

05: Certification configuration code, including multiple international certifications (CE, UL, ATEX, etc.), applicable to both explosion-proof and non-explosion-proof areas.

III. Working Principle

It operates based on the eddy current measurement principle. The preamplifier's internal high-frequency oscillator generates alternating current, which is transmitted through the cable to the probe coil; when the probe is close to the metal shaft, the surface of the shaft induces eddy currents, changing the impedance of the coil. The preamplifier captures the impedance changes, amplifies, demodulates, and linearizes them, then outputs a linear negative voltage signal proportional to the gap, achieving non-contact static displacement and dynamic vibration measurement. It is not affected by oil, water vapor, and dust, and is suitable for harsh industrial environments.

IV. Core Technical Parameters

(1) Electrical Parameters

Compatible probes: 330101, 330102, 330103, 330104 series 8mm eddy current probes;

Sensitivity: 7.87 V/mm (200 mV/mil);

Linear range: 0.25mm - 2.3mm, effective range 2.0mm;

Output voltage: -1VDC to -17VDC; standard gap 1.27mm output -9VDC;

Frequency response: 0Hz - 10kHz;

Power supply: -24VDC (±10%), maximum power consumption ≤ 2W;

Output impedance: 50Ω;

Power supply stability: for every 1V change in input, output changes < 2mV.

(2) Environmental and Mechanical Parameters

Preamplifier operating temperature: -40℃ to +85℃;

Probe operating temperature: -51℃ to +177℃;

Storage temperature: -51℃ to +100℃;

Protection level: IP67, dustproof and water-resistant;

Shell material: A383 aluminum alloy, shock-resistant and corrosion-resistant;

Installation method: standard DIN rail installation;

Size: approximately 110mm × 70mm × 20mm;

Weight: approximately 0.25kg.

(3) Certification and Compliance

Basic certification: CE, RoHS certification;

Explosion-proof certification: ATEX, UL certification, applicable to flammable and explosive hazardous areas;

Industry standards: complies with API 670 rotating machinery monitoring standards.

V. Structural Design and Core Features

(1) Structural Design

Compact modular structure, snap-fitted onto the DIN rail of the control cabinet, easy to disassemble and assemble. Equipped with coaxial signal interface, power supply, and signal output terminals, with clear layout. The factory has precisely calibrated the total cable length to 5.0m, ensuring high impedance matching and low signal loss. No on-site secondary calibration is required.

(II) Core Advantages

High precision and stability: Low drift design, strong consistency in long-term operation, small drift error;

Strong anti-interference: Built-in electromagnetic shielding, resistant to EMI/RFI interference, suitable for complex electromagnetic environments;

Short-distance compatibility: 5.0m calibration length, meeting the close-line wiring requirements of small and medium-sized equipment;

Full compatibility and interchangeability: Completely compatible with 3300 XL series 8mm probes and extension cables, universal spare parts;

High protection and reliability: IP67 protection, aluminum alloy casing, resistant to high temperatures, dust, and vibration;

Explosion-proof compatibility: Multiple certifications, applicable in hazardous areas, broader application scenarios;

Non-contact measurement: No mechanical wear, low maintenance frequency, long lifespan.

VI. System Composition and Compatibility

(1) Complete System Composition

A measurement system consists of: 330100-50-05 preamplifier, 3300 XL 8mm probe (330101/02/03/04), 330130 series extension cable. The total cable length must be strictly 5.0m; otherwise, it will affect accuracy. It is prohibited to change it at will.

(2) Equipment Compatibility

Fully compatible with the 3300 and 3500 series monitoring racks;

Can be connected to mainstream control systems such as DCS, PLC, etc., for display, alarm, and interlock;

Compatible with common metal shaft materials such as AISI 4140 steel.

VII. Typical Application Scenarios

Power industry: Steam turbine, gas turbine, generator vibration displacement monitoring of thermal power / nuclear power units;

Petroleum and chemical industry: Centrifugal compressor, process pump, fan, equipment in explosion-proof areas;

Metallurgical industry: Large motors, blast furnace fans, gearboxes, etc., for monitoring high-speed equipment;

General industry: Key rotating equipment in paper, cement industries, for fault warning and preventive maintenance.

VIII. Installation and Maintenance Specifications

(1) Installation Requirements

Installation location: DIN rail in the control cabinet, away from heat sources, high voltage, and strong interference sources;

Wiring specification: Distinguish power supply, signal output, probe interface, secure wiring, tighten coaxial connectors;

Gap adjustment: Static gap between the probe and the shaft is adjusted to 1.27mm to avoid contact;

Cable management: The total length must be strictly 5.0m, with a bending radius of ≥ 5 times the cable diameter, to avoid bending.

(2) Daily Maintenance

Regular calibration: Once a year for accuracy calibration;

Routine inspection: Check connectors, cable integrity, and environmental temperature;

Cleaning maintenance: Regularly clean dust to ensure heat dissipation;

Spare parts management: Use original probes and cables, non-original components are prone to deviation or failure.

IX. Usage Precautions

Temperature range: Working temperature -40℃ to +85℃, avoid overheating;

Avoid shock: Resistant to vibration but not severe impact or long-term intense vibration;

Explosion-proof compliance: Complete certifications, applicable in hazardous areas, must comply with explosion-proof regulations;

Prohibition of modification: Do not change cable length, replace non-original components or disassemble, otherwise it will fail and lose warranty;

Power-off operation: Cut off power when wiring, maintenance, to prevent short circuits or electric shock.