Rusty, I have not used the balance module of the 2130 yet. If it is as straight forward as the alignment module I think I'm going to like it. Our stand alone alignment equipment is nice, but I was impressed with what the 2130 could do.

If the definition of a true two channel is the ability to calculate the transfer function at all frequencies + display of B/A for coherence and transmissibility, then I guess the 2130 is the only real 2-channel out there. Does that mean Commtest, Pruftechnik, SKF et al are taking us for a ride? Is there any sense in buying those at all then?

Regards,

Aditya

Dear All,
It was very nice reading replies to this subject over the past 3 years.I dont know if much of ur opinions have changed so far.
I wonderd about DLI prouducts not being of so much interest in the disscution.I belive the Expert alert soft ware is a very powerfull tool in the OEM world.It saves you very much of ur valuable time by making the analysis simple.
I would like to read on ur comments on this.
B/R

Hey Nate - hows the new toy performing.
Up to expects?

Mike.

quote:

It saves you very much of ur valuable time by making the analysis simple.

And therein lies the problem.... as discussions on this board illustrate, many vibration problems are not at all "simple" even though we'd like them to be. Many "systems" that try to make complex issues "simple" just don't work, because it's just not possible.

I have seen the DLI in operation and was amazed how well it performed and did its diagnostics and basically as far as PdM goes - it really did a good job on all observed. I was impressed. Remember; we're doing PdM for the most part and not vibration analyses trouble-shooting complex problems. There is a difference and should be a seperation I think.

Good point, Sam. I suppose we should work at making "detection" via PdM as easy as possible, which would allow more time to do the requisite "diagnostics".

quote:

Originally posted by Danny Harvey:
Vibeguy,

As I understand it, the Commtest cannot collect route data in 2 channels simultaneously. Am I mistaken, because that is one of the CSI tools like Rusty described that is a real timesaver that can greatly increase efficiency?

I also seem to remember from the demo that there were a few higher end diagnostics in the 2120-2 and Consultant that the VB3000 couldn't do.

I really liked the software, price and support from Commtest, though.

The new Commtest vb7s do allow for simultaneous data collection on 2 channels. I was a Beta tester for these units and while the speed of a 2120 or 2130 per bearing is not as fast, they are solid data collectors. The technical support Commtest provides is great. They are kind of cumbersome when doing extra analysis in that you have to push a couple more buttons but the analysis parameters are plentiful. The analysis software is much more functional than RBMware in that it is a true Windows program...plus the are a lot cheaper than CSI.

But; PdM route collection - DLI does 3 ch or will do a triax all at once.

Areva, Crystal instruments Benstone, IO tech, NI etc all have 2-8 channels and can do transfer functions etc. Diagnostics instruments (brought by SKF) are two channel they can collect data on both channels at the same time and lately SKF and soon Entek have released FRF software for their latest data collectors. Commtest can collect upto 4 channels at once (have you tried the 6 pack function Wow its fast!) again all the data is there for FRF and I believe they will add this feature in the future. So the CSI 2130 is not the only true two channel instrument.

This is nice thread to follow up.

After a year of development, we implemented both dynamic signal analyzer and route-based vibration data collector in one box.

Dynamic Signal Analyzer/Data Recorder
-Continuous recording
-Transient capture with trigger
-Time, FFT, PSD, FRF and Phase
-RPM spectrum and waterfall
-Order tracking
-Swept sine with close loop control
-Shock response spectrum
-Octave filters and sound level meters


Vibration Data Collector
-Route collection
-Trending and alarm
-Spectrum and waveform
-Coast down and run up
-Balancing
-Acceleration, velocity, displacement and tacho
-RMS, overall, peak level

James
www.go-ci.com

Vendor

So have we, to make a follow up on the ME series hand held analyser with built in analysis support. Feedback we received from resellers and a couple of hundred sold units worldwide indicated that there is a requirement for larger colour screen, better resolution, unlimited storage of data and more synch channels and speed. We have a history from the first vibrometer about 1949 made by my father until today, 3 generations of know-how (my son(s) are now working on the software) concurrently working on vibration instrumentation, monitoring, consulting, analysing and training for more than 60 years in the family. So our solution is a selection of rugged PC´s from 5", 7"wide and +8" touch screen computers running XP embedded and made for fork lifts, trucks and McDrive use, with our software and 2-4 IEPE sync sampling inputs, (to satisfy the triax geeks/sorry) built in SSD or rotating disc drive, sync by network to stationary PC software, optional W-lan and BT. So what size of screen do you really need? We have not made the final decision yet. Is 5"VGA and a box less than 2Kg enough or is a 8" worth the extra weight and cost or is the wide screen the optimal? I still think the current B/W 128x64 display coverall pocket size ME42 version is all you need for service and trouble shooting but for data collection you surely need some more. By taking this step we reluctantly make use of the PC development continuously going on and leave the specialized instruments with limited capabilities to the history. It will all be in the software from now on, hardware will be standard COTS in our packaging to achieve best bang for the buck. Your input is highly appreciated. We are always looking for resellers, especially UK, Denmark and Norway. Olov

This message has been edited. Last edited by: OLI,

Tri-ax works but limited at a point unlike three transducers providing 3-point info thus better info.

DLI works well but there has to be a lot of input data as in all engineering data.

DLI is not the only instrument on the block! There are some that basically do the same thing but are basically generic. In other words they do banding analyses the same as DLI does exact frequency analyses. I actually like the idea of banding analysis better than discrete frequency analysis. Who has all that data on all machines in all plants. Especially if you're a consultant. I have some papers I'll share if you request.

Vendor warning: I use a ME-72 that provides me with a wonderful PdM program in a plant where we have planned maintenance and haven't worked OT in well over five years. Yes, planned scheduled maintenance.

I'm with Oli and rep those instruments in USA.

Write and I'll provide you with a real plant report with real data we use exactly as it is. I think you'll like what you see and you can compare it against what you are using. Will yours muster? Can you do this with several instruments? Yes probably or maybe but not with all. All this at a price you'll like. And, field proven and here to stay. I don't mind selling a product I have full confidence in. I am in maintenance 42 years and consulting since 1983.