Tagged With "transducers"

Topic

Setting up a vibration route on a centac compressor

Wayne0637 ·
We are currently trying to set up a vibration route for our Centac compressors on our CSI 2140. In the past using our ENTEK equipment we used a high frequency transducer for the bull gear and each stage of the compressor. However, using the wizard in AMS machinery manager it doesn't ask us to change transducers. Does anyone have any experience using CSI equipment for readings on a Centac compressor?
Topic

High temperature transducers for GT sets

vibramac ·
Undertaking a vibration survey/'in-situ' balancing exercise on a GT13E2 (Alstom, single shaft!!) and would like some answers, if possible: 1) what is the high temperature transducer of choice for the hot end and its attachment (stud, glue,)? 2) I assume standard magnet mounted velomitor transducers for the cold end? 3) Generally, how many measurement vibration planes (i.e. GT brg configuration)? 4) How many accessible balance planes? 5) I assume there is an exposed shaft area for speed/phase...
Topic

Converting Velocity Signal from Velocity Vibration Transducer

DuPlesis ·
Guys, I would like to have inputs from the fellows who have worked with SKF Microlog Analyzer. I have a Permanent installation, stud mounted Velocity Transducer (Make: CEC Model:4-131) installed on Accessory Drive Gear box of Solar Titan 130 Gas Turbine. I want to get Acceleration Data from the BNC Connector of this Velocity Sensor. However, in the setup for Micro log Analyzer when I select Vibration sensor type as velocity sensor the measurement units I get are only for Velocity or...
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Re: High temperature transducers for GT sets

John from PA ·
Isn't there some form of system that can generate data plots from the existing transducer suite?
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Re: High temperature transducers for GT sets

vibramac ·
John, Thanks for your interest. I been told from a third party that this is the situation. Can only confirm once on site. Thinking that this maybe associated with a standard 4-20 mA signal or something similar.
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Re: High temperature transducers for GT sets

OLI ·
Not relating to this specific. I use a "fibre bakelite" block as temp barrier, bolted is always nice but X60 2-comp glue take higher temp than charge mode transducer almost. Otherwise charge mode accel for hi temp is required. Even I would use a std. 100mV IEPE accel in cold planes, in this case, raw signal not a velomitor but that's me. You can normally only "access" outher rotating system if it is a twin shaft (or more). If unbalance is in another system you have a problem. In aero types,...
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Re: Setting up a vibration route on a centac compressor

John from PA ·
40+ views and no replies, so let me be the first, although I can't help you with your AMS/CSI 2140 specific questions.. Centac's are usually equipped with proximity probes and often permanent monitoring. Do you propose to monitor this machine in a walk around program?
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Re: Setting up a vibration route on a centac compressor

Wayne0637 ·
John Yes we are looking to monitor it with a walk around program as well as the permanent monitoring. Both compressors do have proximity probes on the 3 stages. This is more of a double check as these are vital to the operation of our plant.
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Re: Converting Velocity Signal from Velocity Vibration Transducer

John from PA ·
A previous discussion exists on this forum...see https://www.maintenance.org/to...elocity-acceleration . Suffice it to say that what you want to do is not a recommended practice and hence the reason the option is not offered.
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Re: Converting Velocity Signal from Velocity Vibration Transducer

Walt Strong ·
The velocity sensor only has a F-max of 2000-Hz, so why try to convert to acceleration? I don't know about the SKF software, but CSI allows acceleration display (signal differentiation) in the spectrum view (not waveform). It does not allow sensor definition Velocity->Acceleration for the analyzer, but perhaps the new analyzers and software do. Walt
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Re: Converting Velocity Signal from Velocity Vibration Transducer

Boilermaker ·
With the SKF analyzer and software the vibration data, the time waveform and spectrum units will be in units of the transducer, in your case velocity. However, in the software you can convert the spectral data into displacement and acceleration. Just right click in the spectrum plot and select the unit you want. Right click and select "Reset settings" to bring back to the original unit. The time waveform data is not convertible. In your case it will be in velocity units.
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