Saving and acquiring measurement state on vibration measurement

Background:
I use HP3566A which is multisignal spectrum analyzer. I used it to acquire and analyze vibration response from a machine.
I would like to make an imitation of HP3566A by using DAQCard PCI-4451. I use LabVIEW7.1+SVT 3.1 to develop a dynamic signal analyzer (DSA) vi, and use windows XP as the OS.
Problem:
Until now, there is some facility on HP3566A that I could not develop on my LabVIEW. It is the facility to save the measurement state and call it back when I need it, then automatically set/configure the software. Measurement state is some parameters that are used control some measurement, such as: Span frequency, freq. line, Eng. Unit, measurement type (power spectrum, FRF, etc), trigger type, averaging, and so on.
Right now, on my DSA.vi, to solve the above problem, I only can perform the saving data facility. So that, I can save the measurement state that is used on some vibration measurement. But still, every time I want to run my DSA.vi with that measurement state, I should manually type the measurement state to the front panel parameter. It is very inefficient and wasting time.
Question:
Could anyone help me to show the way in making a facility so that when I call the measurement state which has been saved before, the measurement state can automatically fulfill the parameter on the front panel?
Thank you for your kind attention

One common technique is to use a cluster control on the front panel of your VI with the configuration items you need. You can store this configuration cluster along with your data, by placing the waveform data type as part of your cluster (or array, or whatever you are using to carry your data). Use the file write function to store both the data and the configuration cluster.
When you read data back from the file, it has the config info in it. You could use this to store test set-ups, etc.
You may also consider storing your test set-ups in a spreadsheet, then reading and parsing the spreadsheet prior to running a test.
One implementation of these functions is a LabVIEW application built with the NI tools, Vibdaq, www.vibdaq.com.
Hope this helps.
Preston Johnson
Principal Sales Engineer
Condition Monitoring Systems
Vibration Analyst III - www.vibinst.org, www.mobiusinstitute.com
National Instruments
[email protected]
www.ni.com/mcm
www.ni.com/soundandvibration
www.ni.com/biganalogdata
512-683-5444

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Message Edited by vt92 on 09-16-2009 02:42 PM
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I've written a Vi to to acquire data simultaneously from 7 devices. I'll be using cDAQ9178 with NI9203. The vi will acquire current values 4 to 20mA. Could you please check the attached file and let me know if I need to improve it.
I have some question and I should be grateful if anyone can help me to answer them.
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Solved!
Go to Solution.
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triggering and simultaneous measurements.vi ‏97 KB

1. How to open the binary file from write to measurement file by EXCEL?
If you select TDMS as the file format in the write to measurement file, you should be able to open it directly from Excel if you install the TDMS Excel Add-In. Be aware that at 1kHz data rate, you will exceed the capability of old versions of Excel to read the entire file in about 65 seconds. Newer versions can read more, but anything over a couple thousand points gets difficult to analyze. That is about my limit. Over this, I go to something else for analysis, such as LabVIEW or Mathematica.
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4. Finally I have another vi for valve control that should be triggered with the measurement vi, is their any way to do that?
We do not have enough information to answer this question. Specifically, how is the valve being triggered (boards being used, hardware interface, software interface). The ideal way would be to run it through the same cDAQ 9178 so that it can be synchronized through hardware. Software synchronization cannot be guaranteed better than about ±50ms. Read up on how to synchronize things through DAQmx and you should be good.
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Saving and acquiring measurement state on vibration measurement

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