converting accel to velocity and visa versa 1

[micjk]

To anyone using a csi 2120 consultant analyzer and RBMware software. I've collected data off some of our machines, downloaded to RBMware and ran an exception analysis report based on percentage of fault. The report was generated with mixed values i.e.acceleration and velocity. Is this because these values are what the report based its fault percentage on and if so how can I convert them to be the same either accleration or velocity. I've tried several formulas that I've found in my old training manuals but the results don't seem to be correct.
HELLLP!!!!!
Thanking you in advance,
Roy Gariepy
Maintenance and Reliability Tech.
Dorlastan Fibers Div.
Bayer Corp.
Bushy Park SC

 

[motorman]

download this calculator. we use it all the time. it is especially help when jumping from metric to english

http://www.wilcoxon.com/calculator.html

 

[electricpete]

Here's my thumbrules for US where we measure velocity in ips pk and acceleration in g's peak and displacement in thousandths pk-to-pk.

The crossover frequency where 1 g =1 ips is approx 3600cpm.

If 3600cpm is the frequency you are looking at then the conversion is easy 1.

For other frequencies, we need only remember that the conversion is proportional to frequency and acceration weights the higher frequencies higher. So at 7200cpm 1ips would be 2g's. At 36,000cpm 1ips would be 10 g's.

And of course velocity weights the lower frequencies higher.
At 1800cpm 1g would be 2ips. At 900cpm 1 g would be 4 ips.

Similar conversion strategy can be used between velocity in ips pk and displacement in mils pk=to=pk if we remember the crossover is 18,000cpm. At 18,000cpm 1 mil = 1 ips. At 1,800 cpms 1 mil = 0.1 ips. (displacement weights the lower frequencies higher).

To me rembering these two crossover frequencies is easier than remembering a formula.

 

[micjk]

Thank you motorman