Bentley 3300/61-04-01-01-00-00-00 Dual-channel Vector (XY Axis) Vibration Monitoring Module Detailed Product Description

I. Product Overview

The Bentley 3300/61-04-01-01-00-00-00 is a dual-channel vector (XY axis) vibration monitoring module of the 3300 series TSI (Turbo Generator Monitoring Instrument) system under Baker Hughes, specifically designed for the analysis of the axis trajectory (Orbit) and vector vibration of large rotating machinery. It is the core monitoring unit for rotor dynamics fault diagnosis. It adopts a standard 19-inch rack-mounted modular structure, supports hot-swapping operation, and can be disassembled and replaced without interrupting the system power supply. This module is equipped with 3300 XL series eddy current probes (X and Y orthogonal installation) to process the two orthogonal eddy current probe signals, generating axis center trajectory and vector vibration data. It features high-precision measurement, trajectory display, fault diagnosis, and alarm interlock functions, strictly following API 670 standards. It is widely used in non-explosive areas of power, petrochemical, and metallurgical industries, and is compatible with steam turbines, gas turbines, centrifugal compressors, and generator sets with sliding bearings, for the online identification and protection of complex faults such as axis position monitoring, oil film wobbling/oscillation, rotor imbalance, misalignment, and rubbing. 

II. Model Coding Rules

3300: This is the classic 3300 series modular TSI system of Bentley Nevada, with a standard 19-inch rack installation, supporting multi-module combination, centralized power supply, and hot-swapping.

61: Function code, defined as a dual-channel vector (XY axis) vibration monitoring module, specifically designed to process two orthogonal eddy current probe signals, generating axis center trajectory and vector vibration data.

The following 7-digit configuration codes (3300/61-XX-XX-XX-XX-XX-XX):

The 1st digit (probe specification): 04 = Compatible with 3300 XL 11mm eddy current probe (standard long stroke).

The 2nd digit (range and sensitivity): 01 = Standard range 0-2mm peak-to-peak, sensitivity 7.87V/mm.

The 3rd digit (frequency response): 01 = Standard frequency response 1-1000Hz, covering 1×/2× frequency division analysis requirements.

The 4th digit (Keyphasor interface): 00 = No Keyphasor speed synchronization input.

The 5th digit (analog output): 00 = No analog output, only relay alarm.

The 6th digit (communication interface): 00 = No additional communication, compatible with 3300 system internal bus.

The 7th digit (special function): 00 = Standard type, no customized functions.

III. Core Functions

Dual-channel orthogonal vector measurement (XY axis): Two input channels are completely independent and synchronized sampling, compatible with X and Y direction vertically installed eddy current probes, real-time collecting radial two-dimensional vibration data, generating axis center trajectory (Lissajous figure), vector amplitude, phase angle, and 1×/2× frequency division vectors, accurately reflecting the dynamic motion characteristics of the rotor.

Axis center trajectory and vector analysis: Built-in high-speed signal processing algorithm, supports real-time axis center trajectory display, vector trend tracking, phase analysis, and frequency division extraction, can clearly distinguish typical fault trajectory forms such as oil film wobbling, oil film oscillation, rotor imbalance, misalignment, and dynamic static rubbing, providing direct diagnostic basis for complex rotor dynamics problems. High-precision signal acquisition and processing: Utilize a 24-bit high-speed ADC for sampling, with 512 samples per channel per second. The measurement linear error is ≤ full scale ±0.5%, phase accuracy is ≤ ±2°, the minimum resolution is 0.01mm, and it can stably capture minute axis center offsets and vibration changes.

All-round fault self-diagnosis: Built-in OK self-check circuit, 24-hour monitoring of probe, extension cable, and preamplifier for open circuit, short circuit, signal over-limit, gap anomaly, etc. faults. Accurately distinguish between mechanical equipment faults and sensor circuit faults, reducing false alarms and false interlocks; panel LED synchronously displays channel OK, faults, bypass status.

Programmable multi-level alarm and interlock: Each channel can independently set two-level alarm thresholds (warning / danger) for vector amplitude and phase angle (warning / danger). Alarm delay is programmable from 0 to 10 seconds, filtering instantaneous fluctuations; the entire machine is equipped with 4 SPDT passive relay contacts (2 contacts per channel), with a rated load of 250V AC/3A, and can directly connect to sound and light alarms and unit safety interlock circuits.

Local status display and operation: The front panel is equipped with a high-contrast LCD light column display, which can simultaneously display X/Y axis vibration amplitude, axis center trajectory contour, and alarm status; combined with operation keys, it can complete parameter settings such as alarm thresholds, range, and trajectory display mode on-site, without relying on the upper computer.

Strong anti-interference and system integration: Metal shielding structure, input/output/power circuit electrical isolation, resisting electromagnetic interference from frequency converters and high-voltage equipment; supports internal 3300 system bus communication, compatible with System 1 monitoring software, enabling remote parameter configuration, trajectory data storage, trend analysis, and fault traceability.

VII. Technical Specifications Measurement parameters

Number of channels: 2 completely independent, synchronous and isolated channels (X-axis and Y-axis orthogonal).

Sensor compatibility: 3300 XL 11mm eddy current probe, extension cable, preamplifier.

Measurement range: Standard 0~2mm peak-to-peak (can be scaled on-site).

Sensitivity: Standard 7.87V/mm.

Frequency response: 1~1000Hz (-3dB), supports 1×/2× band-pass filtering.

Sampling rate: 512 samples per second per channel.

Measurement accuracy: Linear error ≤ ±0.5% of full scale, phase accuracy ≤ ±2°, resolution 0.01mm.

Alarm settings: Two-level alarms for each channel vector amplitude and phase angle, with delay of 0~10 seconds programmable. Electrical parameters

Power supply: -24V DC (allowable fluctuation ±10%), supplied by the back panel of the 3300 rack.

Power consumption: ≤3.5W, maximum working current 18mA.

Input impedance: matched to the standard input impedance of the 3300 XL preamplifier.

Relay output: 4 SPDT passive contact points, 250V AC/3A, 30V DC/3A.

Isolation performance: High-voltage electrical isolation between input/output/power supply, anti-common-mode interference ≥2500V AC.

Environmental and mechanical parameters

Operating temperature: -40℃~+70℃.

Storage temperature: -40℃~+85℃.

Relative humidity: 0%~95% (no condensation).

Installation method: Standard 19-inch rack slot installation of the 3300 series, supports hot swapping.

Shell material: Metal panel + flame-retardant engineering plastic, shock-resistant, corrosion-resistant, oil-resistant.

Protection level: IP20 (internal installation of the control cabinet).

Size: 254mm×165mm×63.5mm (standard 3300 module size).

Weight: approximately 1kg.

Certification and compliance

Industry standards: Compliant with API 670 Rotating Machinery Monitoring and Protection Standards.

Electromagnetic compatibility: CE certification, compliant with EN 61000-6-2, EN 61000-6-4 standards.

Explosion-proof rating: Non-explosion-proof design, no built-in safety barrier, only applicable to non-flammable and non-explosive areas.

VII. Structural Design

The module adopts a standard rack-mounted modular structure, divided into the front panel, internal main circuit, and rear wiring terminals. The layout is compact, facilitating installation, wiring, and maintenance.

Front panel: integrates LCD light column display (displaying X/Y axis amplitude and trajectory), power/OK/alarm/fault LED indicators and operation keys, allowing on-site viewing of real-time data, alarm status, and basic parameter configuration, with intuitive and convenient operation.

Internal main circuit: divided into two completely independent synchronous signal processing units, corresponding to X and Y channels. Each unit integrates signal conditioning, high-speed sampling, filtering, vector calculation, trajectory generation, alarm comparison, and relay drive circuits. There is no electrical connection between channels, and a single-point failure does not affect the operation of the other channel.

Back wiring terminals: zoned layout, clearly divided into X/Y axis probe input terminals, 4 relay alarm terminals, power terminals, and system communication interfaces. Terminal markings are clear, wiring is neat, facilitating on-site wiring, troubleshooting, and maintenance.

Hot-swappable design: The module and the back panel of the rack use gold-plated connectors, with reliable contact, supporting online insertion and removal, and replacing the module does not require shutting down the entire TSI system, reducing the impact of maintenance on the unit's operation.

VIII. System Compatibility

Hardware compatibility

Rack and power supply: Perfectly compatible with the 3300 series standard 19-inch rack, system power module, system monitoring module. Functional modules such as vibration, displacement, and speed with the same series can be installed and work collaboratively.

Sensing components: Fully compatible with 3300 XL 11mm eddy current probes, extension cables, preamplifiers. Components of the same specification can be directly interchanged without recalibration.

Output connection: Relay contacts can be connected to sound and light alarms, unit interlock circuits, DCS/PLC dry contact inputs to achieve alarm and protection linkage.

Software compatibility

Configuration software: Compatible with the 3300 series dedicated configuration software, supporting remote parameter configuration, alarm logic editing, trajectory display mode setting, and firmware upgrade. Monitoring software: A system for monitoring the status of System 1 equipment, capable of real-time acquisition of axis trajectory data, vector trend analysis, fault record storage, report generation and remote access, and supporting rotor dynamics fault diagnosis and equipment full life cycle management.

VII. Typical Application Scenarios

Power Industry: Rotating shaft axis trajectory and vector vibration monitoring for steam turbines, gas turbines, and other rotating equipment in thermal power plants and nuclear power plants, real-time identification of oil film vortexing, oil film oscillation, rotor imbalance, misalignment, and dynamic friction between rotor and stator, warning of shaft system instability risks, and ensuring safe and stable operation of main units.

Petrochemical Industry: Axis position and vibration vector monitoring for centrifugal compressors, process turbines, and large steam turbines in non-explosion-proof areas, avoiding unplanned shutdowns caused by rotor faults, bearing wear, and unstable oil film, ensuring continuous production.

Metallurgical Industry: Axis trajectory monitoring for high-speed rotating equipment such as blast furnace fans, sintering main exhaust fans, and large drive motors, predicting potential bearing wear, rotor imbalance, and shaft misalignment, reducing equipment failure rates.

General Industry: Large rotating machinery in industries such as cement, papermaking, and water treatment, such as coal grinding machines, fans, and pump sets, conducting online monitoring of axis status, rotor dynamics fault diagnosis, and safety interlock protection, extending equipment lifespan, and reducing operation and maintenance costs.

VIII. Installation and Maintenance Specifications

Installation Requirements

Frame Installation: Insert the module smoothly into an empty slot of the 3300 frame, ensure that the gold-plated connector at the rear is fully engaged, tighten the panel screws to prevent loosening.

Sensor Wiring: Connect the 3300 XL 11mm eddy current preamplifier signal cables to the corresponding input terminals according to X/Y channel numbers. Ensure the wiring is secure, single-ended grounding of the shielding layer, and avoid interference.

Alarm Wiring: Connect the relay contacts according to the design drawings to the audible and visual alarm circuit or the unit safety interlock circuit, distinguish between warning and dangerous contacts, and ensure correct interlock logic.

Power On Configuration: Confirm normal -24V DC power supply before powering on. Through panel buttons or remote configuration software, set parameters such as X/Y axis range, alarm threshold, delay, and trajectory display mode, and save and apply.

Probe Installation: X and Y probes must be installed vertically and orthogonally. The static gap of the 11mm probe is 1.27mm. The probe end face must be perpendicular to the surface of the measured shaft, and the cable must be well fixed and protected to avoid vibration wear.

Daily Maintenance

Inspection and Check: Regularly observe the LCD display on the panel and LED indicators to confirm normal X/Y axis vibration and trajectory display, no faults in the channels; check for any looseness, oxidation, or overheating at the connection terminals, and promptly address any potential hazards.

Precision Calibration: Regularly calibrate the module's measurement accuracy and phase using a standard gap calibration device annually to ensure compliance with API 670 standards.

Clean Cooling: Regularly clean the module surface and frame slots of accumulated dust to ensure good ventilation and cooling, preventing short circuits or poor cooling faults caused by dust accumulation.

Spare Parts Replacement: When replacing modules, probes, or cables, must use the original Bentley product of the same model. Do not use non-original components to avoid compatibility issues or measurement errors.

IX. Usage Precautions

This module is not explosion-proof and has no built-in safety barrier. It is strictly prohibited to install and use it in flammable and explosive, areas with combustible gases or dust.

It must be used in conjunction with the 3300 XL 11mm standard eddy current sensing system. Do not mix 5mm/8mm probes. Otherwise, it will result in mismatched range and sensitivity, and measurement failure.

X and Y probes must be installed strictly vertically and orthogonally. The static gap must be set strictly at 1.27mm. Inappropriate gap settings will cause trajectory distortion and increased measurement errors. It is strictly prohibited to disassemble the module, modify the internal circuitry or change the factory-calibrated length of the sensing cable. Any violation of these rules will result in equipment damage and loss of product warranty rights.

Before conducting wiring, maintenance, or module replacement operations, the power supply of the frame must be cut off to prevent short circuits and electric shock accidents.

The alarm threshold, delay, etc. parameters must be set strictly in accordance with the process requirements of the equipment. Improper settings will cause protection failure or frequent false alarms.

The installation position of the module should be as far away as possible from the frequency converter, transformer, high-voltage distribution cabinet and other strong electromagnetic interference sources to reduce the influence of external interference on the measurement signal.