Problem of measurering wrong resistance on DMM with scanner

Hello.
I want to be taught the way for measuring correct resistance on DMM with scanner.
Now, I have connectted DMM and Scanner and use GP-IB for measurement.
The measurement program is for mesureing tenperature using Pt100 and it set scanning 30 chanel.
First turn, It is correct resistance but second turn, suddenly, the resistance decrease.
Instruments turn off for a while, this program sometime good performance so I don't think instruments is wrong.
Please tell me good advie for me.
I'm looking forward to your response.
thank you.

Hi Mr Kazu
I have seen your VI.As there are some sub VIS are absent and I have no DMM just like yours, I could not run your VI.You are using two instruments(DMM and the Scanner) together.If you use only the DMM, what about the result.you told that resistance value on DMM is correct for the 1st cycle.What about the next cycles?
Your problem is a little bit complicated to debug.So I suggest you to perform a simple test to read resistance value from DMM.
You can do it in MAX(NI Measurement & Automation Explorer).Just open MAX and you can see your GPIB interface under "Device and Interface".Right click on GPIB interface and select "Instrument scan".Your DMM should be detected.right click on DMM and select "Communication with instrument".It will open "NI 488.2 communicator".Just input command and click query.Let me know the result.
Another way for simple test is to use "Instrument I/O assistant(block diagram→Input→Instrument I/O assistant).
Would you please tell me whether there is any error sign on DMM when you start your program?
Thanks in advance.
saha | AE | National Instruments, Japan

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Problem of measurering wrong resistance on DMM with scanner

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