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Recent content by COBWARD

Standard for vacuum couplings

Does anyone know what standards I should demand when I specify vacuum couplings? I've heard of Pneurop 6606 but are there any EN standards?
- COBWARD
- Thread
- Apr 26, 2006
- Replies: 0
- Forum: Pump engineering
ATL (Advanced Transistor Logic?)

Can anyone tell me of a useful source of information on ATL (Advanced Transistor Logic)? Any information would be appreciated but only in English, please. The following site has some info : http://web.tiscali.it/ATL/ but it is in Italian!
- COBWARD
- Thread
- Apr 21, 2005
- Replies: 3
- Forum: Computer engineering general discussion
Motor start problems

Does anyone have experience of problems with the former Unitrode part UC3625Q Brushless motor drive IC or can then shed any light on the start up circuit other than that in the standard data sheet
- COBWARD
- Thread
- Mar 9, 2004
- Replies: 3
- Forum: Electric motors & generators engineering
3rd octave filtering

Hi I'm trying to get to grips with the use of 3rd octaves in acoustics. Can anyone explain this phenomenon to me or point me to a useful source of information?
- COBWARD
- Thread
- May 20, 2003
- Replies: 2
- Forum: Electrical Engineering general discussion
ISO 9614 FLOWCHART

I am trying to come to terms with sound intensity testing according to ISO 9614 parts 1 and 2 but finding it very hard going. Has anybody produced a flowchart which could be used to guide an "unskilled" operator through the process?
- COBWARD
- Thread
- Feb 27, 2003
- Replies: 0
- Forum: Electrical Engineering general discussion
CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.

Hi there I have just found a reference to ISO/TR 7849 in ISO 9614 (determination of sound power levels using sound intensity). The title of the ISO/TR document suggests that it is possible to determine sound power from vibration measurements. Does anybody have any practical experience with the...
- COBWARD
- Post #10
- Dec 2, 2002
- Forum: Mechanical Acoustics/Vibration engineering
CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.

Thanks for the advice on this. Unfortunately I still can't work out the Franken Method. The reason for asking the original question is that people within our organisation are keen to reduce the amount of acoustic testing of products in production and rely purely on vibration analysis as it is...
- COBWARD
- Post #8
- Nov 17, 2002
- Forum: Mechanical Acoustics/Vibration engineering
CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.

The products are small pumps approximately 1.5m cubed. I can't find the Franken method in the web version of the NASA handbook. Can anybody give another reference to the method. Thanks
- COBWARD
- Post #4
- Nov 11, 2002
- Forum: Mechanical Acoustics/Vibration engineering
CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.

Hi Does anyone know of a good source of information correlating acoustic measurements (sound power/intensity) with vibration analysis of small (1 or 2 cubic meters) products during production? Thanks
- COBWARD
- Thread
- Nov 1, 2002
- Replies: 9
- Forum: Mechanical Acoustics/Vibration engineering
SOUND INTENSITY MEASUREMENTS

Hi Does anyone in this forum know of or have any opinions on the use of sound intensity measurements for derivation of sound power levels? Also does anybody know about the validity of this technique for use in connection with the machinery directive? Thanks
- COBWARD
- Thread
- Nov 1, 2002
- Replies: 4
- Forum: Mechanical Acoustics/Vibration engineering

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