Bentley 330102-00-40-10-01-00 Electromagnetic Eddy Current Probe Product Description

I. Product Overview

330102-00-40-10-01-00 is a 8mm armored electromagnetic eddy current probe of the 3300 XL series from Bently Nevada (a subsidiary of Baker Hughes). It is an end sensing element of the turbine TSI condition monitoring system. This probe must be combined with the same series extension cable and preamplifier to form a complete measurement circuit. It operates based on the non-contact eddy current principle and is mainly used for radial shaft vibration, axial displacement, shaft eccentricity, phase difference, and rotational speed detection of industrial rotating machinery. The product strictly follows the API 670 standard and adopts a short housing structure and full armor design. It has a compact structure, excellent protection performance, high measurement accuracy, and strong environmental adaptability. It is widely used in large-scale steam turbine units, compressors, fans, pump sets, and other key equipment in the power, petrochemical, metallurgical, and coal chemical industries.

II. Basic Information

This product is a 330102 series armored probe, different from ordinary non-armor probes, with a higher overall mechanical protection level. Model segmentation interpretation: 00 represents that the probe has no exposed threaded section; 40 represents that the total length of the probe housing is 4.0 inches, suitable for shallow holes and narrow installation spaces; 10 represents that the probe comes with a 1-meter cable length; 01 represents the standard ClickLoc quick connector with a protective sleeve; 00 represents the conventional industrial configuration, without explosion-proof special certification.

The standard thread specification of the probe is 3/8-24 UNF American fine thread, suitable for industry-wide common installation bases. The overall structure is made of stainless steel armor, with a protection level of IP65 for the probe body, capable of resisting erosion from dust, oil mist, and water vapor in the field. The product has passed CE, UL regular industrial safety and electromagnetic compatibility certifications, suitable for non-explosion-proof ordinary industrial areas. It is fully compatible with the entire series of preamplifiers, extension cables of Bently 3300 XL, and the entire series of TSI monitoring systems of 3300, 3500, as well as third-party PLC and DCS data acquisition devices.

Operating temperature range: -52°C to +177°C. It can withstand a maximum +218°C high-temperature condition for a short time. Storage temperature range: -52°C to +260°C. The operating environmental relative humidity is 5% to 95%, with no condensation or corrosive media throughout the process. The cable and probe body are integrated, with outstanding tensile and bending resistance capabilities, suitable for long-term continuous operation in the field.

III. Technical Parameters

Electrical Parameters

Standard measurement sensitivity is 7.87V/mm, corresponding to 200mV/mil in imperial units. The full-scale linear error is no more than ±1%. The effective linear measurement range is 2.0mm, and the standard effective working range is 0.25mm to 2.3mm. The working frequency range of the probe coil is 0.5MHz to 2MHz, and the overall system frequency response is 0Hz to 10kHz, capable of fully covering the conventional vibration frequencies of rotating machinery.

The standard DC resistance value of a 1-meter cable probe is 7.59Ω, with an allowable deviation of ±0.50Ω. The probe, when combined with the preamplifier, outputs a standard DC voltage signal, with a range of -1VDC to -17VDC. The minimum diameter of the measured metal target surface is 8.9mm. In engineering applications, it is recommended that the measured shaft diameter be no less than 50.8mm to ensure measurement stability. The product's electromagnetic compatibility performance complies with industry standards and can resist electromagnetic interference generated by frequency converters, high-power motors, contactors, etc.

Mechanical Parameters

The shell length is 4.0 inches, designed specifically for installation points with limited space. The self-contained armored cable has a length of 1 meter. The minimum bending radius of the cable should be no less than 5 times the outer diameter of the cable. Sharp bends and squeezing are prohibited. The installation thread is standard 3/8-24 UNF. The recommended tightening torque for on-site installation is 1.1N・m to 1.4N・m. This is to prevent thread slippage and shell deformation. The end of the probe is sealed integrally. The connection between the cable and the connector is reinforced. The overall tensile strength can reach 330N.

VII. Core Functions

1. Non-contact Precision Measurement

The signal is collected based on the eddy current effect. The preamplifier transmits high-frequency alternating excitation signals to the built-in coil of the probe. The coil generates a stable alternating magnetic field. When the probe approaches the rotating metal shaft, the surface of the shaft induces eddy currents, which reverse and affect the inductance and impedance of the probe coil. The probe transmits the impedance change signal to the preamplifier, which converts it into a linear standard voltage signal. Thus, the gap change between the probe and the shaft body can be accurately quantified, and both static displacement and dynamic vibration signals can be synchronously collected.

2. Stable Monitoring in All Working Conditions

The probe is equipped with high-temperature resistant insulating materials and precise coils. The entire system's automatic temperature compensation circuit can effectively suppress temperature drift in a wide temperature range. The sensitivity fluctuation within the entire temperature range does not exceed ±1.5%. Long-term operation has no obvious signal deviation, ensuring continuous and accurate vibration and displacement data.

3. High-Strength Mechanical Protection

The entire line adopts a stainless steel armored structure. The probe body, cable, and connector all have dustproof, waterproof, oil-proof, and anti-mechanical collision capabilities. It can work for a long time in industrial sites with oil mist, dust, and water vapor. The short shell design is suitable for locations where conventional probes cannot be installed, such as the side walls of equipment and compact supports. The application scenarios are more flexible.

4. Quick Connection and Universal Interchange

A ClickLoc quick connector with a protective sleeve is provided. It can be plugged and unplugged without tools, and the connection is firm with protection capabilities. Probes of the same specification, extension cables, and preamplifiers support direct on-site interchange. After replacement, there is no need for re-calibration or debugging, significantly reducing equipment maintenance downtime and reducing maintenance difficulty.

5. Line Fault Detection and Linkage

It can work in conjunction with the accompanying preamplifier to complete line self-checking. It can accurately identify faults such as probe breakage, short circuit, cable damage, and poor contact in the circuit, and output a dedicated fault voltage signal. The TSI system can achieve local alarm and remote prompt based on the signal, helping maintenance personnel quickly locate the fault point and avoid monitoring failure.

VII. Working Principle

The probe serves as the sensing front end. The internal sensing coil receives the high-frequency alternating current output by the preamplifier, forming an alternating electromagnetic field. The electromagnetic field penetrates the air gap and acts on the measured metal shaft. In the surface layer of the shaft, a closed eddy current is induced. The size of the eddy current changes with the gap between the probe and the shaft body, thereby inversely affecting the electrical parameters of the probe coil. The probe transmits this change to the preamplifier, which converts it into a continuous direct current voltage according to a fixed ratio. The larger the gap, the closer the output voltage is to -17VDC; the smaller the gap, the closer the output voltage is to -1VDC. The system parses the voltage values and converts them into key operating parameters such as shaft vibration amplitude, axial displacement, speed, and phase, enabling online monitoring and protection of the equipment status.

VIII. Installation and Wiring Specifications

When installing, fix the probe on a dedicated installation base to ensure that the end face of the probe is parallel to the surface of the measured shaft. Avoid tilting to avoid measurement errors. The initial installation gap is recommended to be set at the midpoint of the linear range, corresponding to a voltage of approximately -9VDC from the preamplifier output, to obtain the optimal linear measurement effect.

The thread tightening strictly follows the recommended torque. Do not force-tighten. When laying the armored cable, avoid power cables and high-voltage cables. Separate the wiring to reduce electromagnetic interference. The cable path should be gentle, strictly follow the minimum bending radius requirements, and do not drag or crush the cable. When connecting the connectors, insert them into the slots and align them properly. Once you hear the locking sound of the clips, it indicates that the connection is complete. The protective cover of the connector remains intact to prevent foreign objects from entering the interface and causing poor contact. The probe is only used for installing monitoring points on the exterior of the equipment and is not recommended for direct immersion in oil or water.

VII. System Adaptation and Compatibility Requirements

This probe has an 8mm sensing unit. The entire monitoring system must be matched with the same series of 5 meters, 9 meters, etc. standard total length configurations. The combined length of the probe cable and the extension cable must comply with the system's factory calibration. Do not randomly cut or splice the cables; otherwise, the measurement accuracy will be compromised.

It can be combined with the Ingersoll Rand 330100 series preamplifier and standard extension cables to form a complete sensing link and be connected to 3300, 3500 series TSI cards to achieve data display, over-limit alarm, and interlock protection. The output signal is compatible with mainstream PLCs, DCSs, online monitoring analyzers, and other third-party devices.

VIII. Typical Application Scenarios

In the power industry, it is mainly used for large auxiliary machinery such as steam turbine generators, water turbine units, boiler feed pumps, induced draft fans, and exhaust fans to monitor shaft vibration and axial displacement, providing early warnings for shaft seal wear, rotor friction, etc.

In the petrochemical industry, it is applied to continuous operation equipment such as centrifugal compressors, gas turbines, process pumps, and mixing units to ensure the long-term stable operation of chemical plants. This model is suitable for conventional non-explosion-proof production areas.

In the metallurgical industry, it is used for high-temperature blast furnace fans, large transmission motors, and rolling mill supporting rotating mechanisms to complete vibration and displacement monitoring, avoiding safety hazards caused by overload and abnormal vibration of the equipment.

It is also widely used in the phase phase acquisition, speed measurement, and eccentricity analysis of large rotating machinery, providing raw data for equipment dynamic balance correction, fault diagnosis, and condition-based maintenance, and is a standard front-end component of the Ingersoll Rand TSI safety monitoring system.

IX. Product Advantages

The housing is short and compact, specifically adapted for narrow installation spaces, and has stronger on-site versatility. The stainless steel fully armored combination with IP65 protection, resistant to oil, dust, and moisture, has high mechanical strength, and is suitable for complex industrial sites. It uses industry-standard threads for connections and components, with strong interchangeability, convenient on-site maintenance, and no need for professional calibration tools.

The stability in the full temperature range is excellent, with high linear accuracy, fully meeting the API 670 heavy equipment monitoring standards. Industrial-grade component selection, supporting 7×24 continuous operation without interruption, long service life, and low comprehensive usage cost. Complete industrial certifications are available, and it can be directly applied to the vast majority of non-explosion-proof industrial production sites.