Bentley 3300/16-13-01-01-00-00-00 Dual-channel Vibration Monitor Detailed Product Description

I. Product Overview

The Bentley 3300/16 is a modular monitoring device within the Bentley Nevada 3300 series of rotating machinery protection system. The 3300/16-13-01-01-00-00-00 introduced here is a standard configuration model. The product strictly follows the API 670 industry standard. The equipment adopts a 19-inch standard rack with a single slot structure, and the plug-in design enables direct installation in the 3300 series dedicated system rack, being fully compatible with the same series of eddy current probes, preamplifiers, extension cables, and DC power supply components. This module is mainly targeted at the power, petrochemical, metallurgical, and energy industries, and is applied to various rotating machinery such as steam turbines, gas turbines, centrifugal compressors, large motors, industrial fans, and process pump sets, focusing on the real-time monitoring of two-axis radial vibration parameters, over-limit alarm, and safety interlock protection. It is the core unit for monitoring and fault protection of the shaft system and supporting bearings.

II. Model Code Interpretation

3300/16 is the main product model, representing a dual-channel vibration monitoring module. The model suffix consists of seven two-digit codes, defining the channel type, measurement range, analog output, alarm logic, sensor diagnosis, hardware version, and additional certification functions. The specific meanings of each section of this model are as follows.

The first section code 13 represents the channel configuration type, which is a standard dual-channel radial vibration dedicated configuration. The two channels operate independently, only collecting and processing axial radial vibration signals, not focusing on gap-specific monitoring, and is suitable for conventional XY direction vibration monitoring scenarios.

The second section code 01 represents the preset measurement range of the equipment, corresponding to a vibration measurement range of 0 to 1 millimeter peak-to-peak, suitable for high-speed shaft systems with strict vibration amplitude control and small-sized precision rotating equipment.

The third section code 01 represents the analog output type, using industrial standard isolated 4-20mA DC current output, which can be directly connected to DCS, PLC, SCADA, etc., for remote data collection, achieving remote data acquisition.

The fourth section code 00 represents the alarm logic configuration, using the factory default basic alarm logic, without customized channel voting, special interlock expansion functions, and is a general protection logic mode.

The fifth section code 00 represents the sensor circuit diagnosis configuration, enabling the standard full-loop fault diagnosis function, which can monitor the working status of the probe, extension cable, and preamplifier throughout the process.

The sixth section code 00 represents the hardware version, being the original factory standard general hardware version, without special hardware modification and customized design.

The seventh section code 00 represents the additional function and certification configuration, equipped with CE, UL, CSA international universal safety certifications, without additional expansion functions or industry-specific customization requirements.

III. Core Functions

1. Dual-channel Independent Vibration Monitoring

The equipment is equipped with two completely independent measurement channels, which can be connected to two sets of vertically arranged eddy current probes to collect X and Y axis radial vibration signals respectively. The signal collection, calculation, and output of the two channels are independent, and a single channel failure will not interfere with the normal operation of the other channel. The dual-channel architecture enhances the stability and redundancy of the entire monitoring system.

2. Shaft System Fault Warning Identification

The equipment continuously and real-time monitors the amplitude changes of axial radial vibration, effectively identifying rotor imbalance, shaft misalignment, bearing wear, oil film vortexing, foundation loosening, shaft bending, etc., typical rotating machinery faults, capturing abnormal conditions in advance and issuing prompts, effectively avoiding vibration over-limit, shaft friction, bearing burnout, and unplanned equipment shutdown. 3.分级 alarm and interlock protection

Each channel is independently equipped with one warning relay and one danger relay. The warning value and danger trip value can be individually set through local buttons. The rated parameters of the relay contacts are 250VAC and 3A. The contact mode supports on-site switching between normally open and normally closed states. A hierarchical alarm and emergency shutdown control logic can be established based on the requirements of the unit operation.

4. Self-diagnosis of sensing circuit faults

A complete loop detection mechanism is built-in. The entire sensing system composed of eddy current probes， high-frequency extension cables, and preamplifiers is monitored in real time. When faults such as open circuit, short circuit， signal beyond the measurement range， or abnormal power supply occur， the equipment will immediately trigger a sensor fault alarm， lock the abnormal channel data， and prevent false alarms and false interlock actions caused by sensing circuit problems.

5. Local display and on-site parameter configuration

The body is equipped with an LED digital display screen and operation buttons. Maintenance personnel can directly view real-time vibration values， loop status， current alarms and fault information on-site. The equipment supports on-site setting of all parameters such as vibration range， alarm threshold， frequency response， correspondence of analog output， and relay working mode. All parameter settings are automatically saved and the data will not be lost after power failure. All debugging work can be completed without the need for an external upper-level software.

6. Standard analog output

Each channel is equipped with isolated 4-20mA current output. The output signal is linearly corresponding to the vibration measurement range. The electrical isolation design can effectively resist industrial site electromagnetic interference and meet the usage requirements of remote data transmission， trend recording， and centralized monitoring.

7. Programmable frequency response

The equipment provides two frequency response modes that can be switched on-site. The low-frequency mode is suitable for low-speed and heavy-load rotating equipment， while the high-frequency mode is suitable for high-speed turbine units. It can match the vibration frequency characteristics of different rotational speed equipment to ensure measurement accuracy under different operating conditions.

4. Working principle

This module operates based on the mature eddy current non-contact measurement principle. The eddy current probe is connected to a high-frequency alternating current， and when the probe approaches the metal shaft surface， the metal layer will induce eddy current. When the shaft system generates radial vibration， the gap between the probe and the shaft body changes dynamically， directly altering the eddy current intensity and the equivalent impedance of the probe. The signal change is transmitted through the high-frequency coaxial extension cable to the preamplifier. The preamplifier amplifies， shapes， and compensates for the original signal， and then outputs a stable linear voltage signal sent to the 3300/16 monitoring module.

The internal circuit of the module analyzes and processes the input signal， extracts the dynamic vibration component and converts it into the peak value of vibration. The system compares the measured vibration value with the preset warning and danger thresholds. Once the set conditions are reached， the corresponding relay is driven to act， and a switch quantity interlock signal is output. At the same time， the vibration value is linearly converted into a 4-20mA standard current signal for external output. The two channels complete signal processing and logic judgment independently， combined with the loop diagnosis function， to achieve stable and reliable vibration monitoring and equipment protection throughout the process.

5. Main technical parameters

1. Input and compatibility system

The entire machine has two independent eddy current signal input interfaces， fully compatible with the 3300XL series eddy current probes， 330180 series preamplifiers， and 330130 series high-frequency extension cables. The input impedance of the equipment is 10kΩ， which can match the output characteristics of the accompanying sensing equipment. The standard working gap voltage range is - 4VDC to - 20VDC， and the normal operating point is - 12VDC.

2. Measurement performance parameters

The standard vibration measurement range is from 0 to 1 millimeter peak-to-peak， and it supports on-site small-scale range correction. Under normal temperature conditions, the measurement error of the equipment within its full range does not exceed ±1%, and the measurement resolution can reach 0.001 millimeters. The measurement accuracy meets the requirements of industrial precise monitoring. The frequency response is divided into two levels, namely 1 to 600 hertz and 4 to 4000 hertz, which can cover the vibration monitoring needs of various rotating equipment from low speed to high speed.

3. Output Electrical Parameters

The analog output is isolated 4-20mA direct current, and the maximum load of a single channel output does not exceed 500Ω. The signal linearity is excellent. The relay output configuration is 1 warning and 1 danger per channel. The contact withstand voltage is 250VAC, the rated current is 3A, and the normally open and normally closed modes can be switched on-site.

4. Power Supply and Power Consumption

The working power supply of the equipment is -24VDC direct current, and the voltage fluctuation range is ±10% of the rated value. The power consumption of the entire machine is approximately 6W under normal operation.

5. Environmental Parameters

The normal working temperature range of the equipment is 0℃ to 60℃, and the storage temperature range is -40℃ to 85℃. The relative humidity of the working environment does not exceed 95%. The usage environment requires no condensation, no corrosive gases, and no large amounts of dust. The product has CE, UL, CSA certifications, and the overall design and performance comply with API 670 relevant specifications.

6. Mechanical Structural Parameters

It adopts a 19-inch standard cabinet adapter structure, with single-slot plug-in installation. The total weight of the equipment is approximately 1.5 kilograms. The body adopts industrial-grade anti-vibration and anti-electromagnetic interference design, capable of adapting to the complex mechanical and electromagnetic environment of industrial sites.

Six. Installation and System Configuration

1. Rack Installation

The module is of standard plug-in structure. It can be directly inserted into the idle slot of the 3300 series dedicated system rack to complete fixation. The installation and disassembly operations are simple, the layout is regular, and it is fully compatible with the standard rack installation specifications of the industrial control room.

2. Sensor Installation

Two eddy current probes are arranged perpendicularly to each other on the outside of the measured shaft, adjusting the initial installation gap to make the corresponding gap voltage stable at around -12VDC, ensuring that the probe works within the linear measurement range. After installation, lock the fixing device to prevent the probe position from shifting during equipment operation.

3. On-site Wiring

The equipment wiring is divided into four categories: -24VDC power supply wiring, two sensor signal wiring, relay interlock wiring, and 4-20mA analog output wiring. When wiring, strictly distinguish the polarity and signal type of the lines according to the terminal markings on the body. After wiring, check the tightness of the wiring to prevent false connections or incorrect connections.

4. Parameter Configuration

After the equipment is powered on, enter the configuration menu through the panel buttons, and complete the settings of vibration range, warning threshold, danger threshold, frequency response level, corresponding relationship of analog output, relay contact mode, and fault alarm rules. All parameters are automatically saved. The power-off will not cause loss of parameters. All debugging work can be completed on-site without the need for an upper-level debugging software.

Seven. Typical Application Scenarios

In the power industry, it is mainly used for steam turbine generator sets, gas turbine generator sets, large generators, to monitor the radial vibration of the shaft system, protect the main shaft and support bearings, and ensure the safe operation of the unit. In the petrochemical industry, it is widely used in centrifugal compressors, process turbines, booster pumps, etc. of key dynamic equipment, preventing vibration exceeding the limit from causing rotor and stator scraping and component damage. In the metallurgical and general industrial fields, it is adapted to large exhaust fans, blowers, high-speed industrial pumps, etc. to monitor the operating status of the shaft system, and detect potential faults such as bearing failure and shaft instability in advance. It is also applicable to various small and medium-sized high-speed rotating machinery, providing vibration monitoring and safety protection throughout the start-up, load regulation, and steady operation cycle of the equipment. VIII. Product Features and Advantages

First, it is highly targeted, specifically designed for dual-channel radial vibration monitoring. It has focused functions and a simple structure, making it suitable for application scenarios where vibration monitoring is the core requirement. Second, it is highly reliable. The dual-channel independent operation combined with a complete sensor circuit diagnosis function can promptly detect faults in the wiring, probes, and preamplifiers, effectively reducing the probability of false alarms and false trips. Third, the measurement performance is stable. It adopts non-contact eddy current measurement technology, with the probe having no mechanical wear. Combined with a high-precision signal processing circuit, the measurement values are accurate, and the parameter drift is small over a long period. Fourth, the system has good compatibility. It features a standard 4-20mA current output and a universal relay interface, enabling quick integration with various mainstream industrial control systems and low integration difficulty. Fifth, it has strong environmental adaptability. It is designed with industrial-grade hardware, has a wide temperature and humidity operating range, and possesses anti-vibration and anti-interference capabilities, allowing for long-term continuous operation in harsh industrial environments. Sixth, it is easy to maintain. It is equipped with a complete local operation interface, enabling quick viewing of status, troubleshooting, and parameter modification at the site; the modular structure supports rapid replacement of spare parts, effectively shortening equipment downtime.

IX. Supporting Components

This monitoring module needs to be combined with components of the same series to form a complete monitoring system. The core supporting components include the 3300XL series eddy current probes, which are selected based on the diameter of the measured shaft and the installation space on site; the 330180 series preamplifiers, which provide power to the probes and complete the pre-processing of the original signals; the 330130 series high-frequency coaxial extension cables, which are used to extend the signal transmission distance and are compatible with the spacing between on-site equipment and control room cabinets. The entire system also requires the 3300 series standard installation racks and -24VDC dedicated power supply modules to provide installation support and stable working power for the monitoring module and sensor components.