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Emerson

Your Professional Emerson Supplier

 

Our goal is to become your true partner in the field of Emerson in China. We specialize in PLC modules, DCS control cards, ESD control cards, turbine supervisory, vibration monitoring and asset protection system. We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.

 

 
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Why Choose Us

 

 

Product application: Our products are ABB, Bently Nevada, Invensys, etc. These products are widely used in CNC machinery and metallurgy, oil and gas, petrochemical, chemical and other industries.


Our experience: We are an industrial automation equipment supplier, we focus on PLC DCS and TSl system modules and spare parts for 10 years.


Our services: In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation. During the sales period, we ensure timely delivery and provide installation guidance. For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.

 

Advantages of Emerson

Non-contact measurement

Proximity probes, a common type of shaft eccentricity monitor, do not require physical contact with the shaft, ensuring minimal interference and reducing potential damage to the shaft or probe.

Wide range of applications

These monitors are used in various types of machinery, including steam turbines, gas turbines, hydro turbines, and other rotating equipment. They are particularly useful in situations where accurate measurement of shaft displacement and vibration is critical for ensuring reliable operation.

EMERSON A6220 Shaft Eccentricity Vibration Monitor
Emerson 8750-CA-NS PAC8000 Controller Carrier

Relative vibration measurement

These monitors measure the relative vibration of the shaft compared to the bearing housing, providing valuable information about the shaft's movement and its impact on the bearing.

Shaft centerline position and orbit detection

When used in pairs, these monitors can measure the shaft's centerline position (dc clearance), which is the distance between the shaft's axis and the bearing housing. They can also measure the orbit, which is the path the shaft's center follows as it rotates.

 

 

Specification of Emerson

 

 

Parameter

Description

Current Mode Outputs

0/4 - 20 mA output for each channel proportional to main value
Open/short circuit proof

Permissible Load (Current Mode)

<500 Ω

Accuracy

±1% of full scale

Settling Time

Configurable, 0 - 10 seconds

Voltage Mode Outputs

0 - 10 VDC output proportional to main value for each channel
Open/short circuit proof

Permissible Load (Voltage Mode)

>10 kΩ

Width

30.0mm

Height

128.4mm

Length

160.0mm

Net Weight

320g

 

 

Features of Emerson

Dual channel, 3U size, single slot plug-in module, reduces cabinet space requirements by half compared to traditional quad channel 6U size cards.

Buffered and proportional outputs on both the front and rear ends provide 0/4-20 mA and 0-10 V outputs for easy connection and signal transmission to different devices.

Can be used with 6422, 6423, 6424 and 6425 displacement sensors, CON XXX drives and key monitoring modules to measure shaft eccentricity. The displacement sensor is non-contact and is installed inside the bearing box or bearing housing. It targets the eccentric ring near the thrust bearing and measures shaft motion related to shaft bending (speed less than 600 rpm.

Emerson KJ2002X1-CA1 M5+ Controller

 

Application of Emerson
 
 
 

Turbine supervisory instrumentation (tsi)

In steam turbines, eccentricity monitors are crucial for tsi systems, helping operators determine if rotor eccentricity is low enough to allow safe startup without damaging the turbine.

 
 

Steam and gas turbines

Eccentricity measurements help assess the risk of rotor-stator contact during slow roll and heating phases.

 
 

Hydro turbomachinery

These monitors can also be used in hydro turbines for similar monitoring purposes.

 
 

Compressors

In some compressor applications, eccentricity monitoring can be beneficial for assessing shaft condition.

 

 

Components of Emerson

Oscillator/demodulator

Generates the high-frequency rf signal in eddy current systems and demodulates the signal to extract radial vibration and distance information, as explained in the sti vibration monitoring field application note.


Signal conditioning modules

Like the mpc-4 module in the skf vm600 protection system, these modules are used to condition the sensor's output for accurate measurements.

Eddy current probe

A common choice for monitoring shaft eccentricity, it measures the change in gap between the probe tip and the shaft, generating a dc signal proportional to distance and an ac signal proportional to vibration.

Proximity probes

These sensors are also used to measure shaft eccentricity, often in non-contact applications like turbo-compressor monitoring.

Analysis software

Software that processes and interprets the recorded data, often for trending and diagnostic purposes.

 

 

Packing and Shipping of Emerson

 

 

Packing

Box

Shipping

Shipped by road, sea, rail

Payment method

T/T (Telegraphic Transfer)

 

 

FAQ

 

 

Q: Can be used for the measurement of shaft vibration?

A: Used for relative vibration monitoring to measure the displacement of the shaft. PAS/PVS: These are piezoelectric sensors based on the seismic mass principle. LVS: This is an electrodynamic sensor using an electromagnetic principle.

Q: How to measure the eccentricity of a shaft?

A: Eccentricity is normally measured P/P (Peak to Peak) to agree with previously established conventions. The actual excursion from shaft centerline caused by bow would be one half that measurement or the 0/P (Zero to Peak) measurement.

Q: What is the difference between a vibration sensor and an accelerometer?

A: An accelerometer measures a quality of acceleration, not necessarily vibration. But vibration sensors, which measure a quantity of acceleration and are therefore a type of accelerometer, are by definition accelerometers. A vibration sensor typically contains a piezoelectric crystal element bonded to a mass.

Q: How do you measure shaft frequency?

A: Simply put, CPM stands for “cycles per minute,” which measures the frequency of a golf shaft. To obtain this measurement, a fitter or club builder places the grip end of a golf club into a clamp, then pulls on the tip section of the shaft and releases it to make it oscillate.

Q: What type of sensor is most commonly used in vibration measurement?

A: The most commonly used sensor for vibration measurement is the accelerometer. Accelerometers measure the change in acceleration of an object, which directly reflects the vibration's characteristics. They are versatile and suitable for various applications, including industrial machinery monitoring and research.

As one of the leading emerson spare parts manufacturers and suppliers, we warmly welcome you to buy discount emerson spare parts from our factory. All our products are with high quality and competitive price.