Tagged With "BNC"

Topic

current clamp

aziz58 ·
dear all i am interesting to buy a current clamp to use it for vibration analyzer by bnc connection to perform high voltage current signature motor analysis . pls suggest applicable clamp by model and its brand. best regards
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...
Topic

Bently Nevada 3500/44M Aeroderivative

Vibration Techn. ·
I would like to ask about portable vibration analyzer setting Sensitivity for Collect vibration data from Bently Nevada 3500/44M Aeroderivative card, the raw data buffer output from BNC was 10mV/g and HMI reading in IPS Thank you for all your assistance.
Topic

Dynamix 2500 wireless Receiver setup

JoelR ·
Hello All, I am trying to collect data from a wireless monitoring system using Allen bradley Dynamix 2500 but was advised that since the wireless receiver is already powered via a lithium battery, I need to disable power supplied by the hand unit before plugging in my BNC. I think its related to ICP setup but not sure. Thoughts?
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Re: Dynamix 2500 wireless Receiver setup

Robert U. ·
Re: Dynamix 2500 wireless Receiver setup
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Re: Dynamix 2500 wireless Receiver setup

JoelR ·
Thanks Robert, I did have a good look through the manual but must have overlooked this. Much appreciated
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Re: Dynamix 2500 wireless Receiver setup

JeffWiley ·
Hi..does the 1066 have a microphone pre-amp, or does your DJ mixer have an 'insert' on the microphone inputs? If the answer to both questions is "no" then you'll not be using the 1066 for the microphone channel.
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Re: Dynamix 2500 wireless Receiver setup

Walt Strong ·
Jeff, You are really lost! Why did you really become a "Member"? Walt
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Re: Bently Nevada 3500/44M Aeroderivative

John from PA ·
If I understand your question, it should be remembered that the transducer input signals are buffered and sent to front-panel coaxial connectors. So if your transducer is 10 mV'g, then the signal at the front panel is 10 mV/g and an external device should be set to that sensitivity. Anything else you desire to do with the external device is independent of the 3500/44M.
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Re: Bently Nevada 3500/44M Aeroderivative

Vibration Techn. ·
Thank you very much John, That mean I can set sensitivity 10 mV/g and convert unit to IPS 0-Pk to comparison with HMI Monitor reading which reading in IPS-0-Pk The vibration probe located in Gas Turbine casing as attached
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Re: Bently Nevada 3500/44M Aeroderivative

John from PA ·
Are you using the system now with the Meggitt CE134 accelerometer? If so, to your knowledge, is it working OK? It has been a long time for me in configuring one but I seem to remember something special needed to be done.
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Re: Bently Nevada 3500/44M Aeroderivative

Vibration Techn. ·
Thank you John, As I known, Wiring Diagram CE 134 probe to Charge Amp sensitivity is 5 µA /g, and GSI convert from µA to mV conversion for long-distance (2-wire) signal transmission to interface module the sensitivity was 10mV/g and in integral to IPS reading in HMI. Any comment please advice, Thank you.
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Re: Bently Nevada 3500/44M Aeroderivative

John from PA ·
My problem is in using the Meggitt accelerometer and charge amp I have no idea what will be present at the buffered output. Is there some particular reason why you are using the CE134 accelerometer instead of a BN/GE offering?
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Re: current clamp

electricpete ·
If you are doing current signature analysis, I would say you can use any clampon probe that 1 - has a high enough range (typically 5A if you are monitoring the secondary circuit of ct's) and 2 - has a spec for output voltage per input current (you don't want output current). You'll need to go into your vibration software and select the proper scaling (millivolts per amp) for the sensor you are using. If you are reading off ct secondary you can also set up the scaling so that everything...
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Re: current clamp

aziz58 ·
thanks in advance
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Re: current clamp

Walt Strong ·
I have not seen a product on the market that meets the OP requirements. Most of the current clamp-on transformers that I have seen with voltage output do not provide a dynamic signal. Be sure to check the specifications. I made my own set up from a standard Fluke clamp-on current transformer with a small interface box containing a resistor and BNC output connector. Walt
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Re: current clamp

electricpete ·
I'm not sure what you're referring to, but should be easy to judge from the spec sheet. If it lists a scaling with some output millivolt AC per input amps ac, then I'd consider it dynamic. If it talks about hooking up to oscilloscopes or gives a frequency range that gives further confirmation The probe we used is from Omega and labeled HHM42. I couldn't find a spec sheet on that particular model, but but looks like any of these in the Omega HHM70 series linked below would work as long as...
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Re: current clamp

Walt Strong ·
El'Pete, Looks like this product line should provide AC current as a voltage signal (waveform and spectrum) with available BNC adapter, as you indicated. http://www.omega.com/temperature/pdf/HHM70.pdf Walt
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Re: current clamp

JardCrocker ·
Hi...i am a new user here. As per my knowledge your vibration software and select the proper scaling for the sensor you are using. If you are reading off ct secondary you can also set up the scaling so that everything displays in ct primary units.
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Re: current clamp

jvoitl ·
The Omega units above are very good. However, they use Hall effect technology to measure both AC and DC current. Unless you have a specific need for DC I would look for something else. Hall effect units can be a little touchy if you're not experienced with them, and even then putting them in a different plane from where they were zeroed can give an erroneous reading.
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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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