Agilent 34970A how to measure current and temperature simultaneously via 34901A

[newbieeng]

Hi everyone,

I am trying to measure temperature and pressure via thermocouples and pressure transducers. I can measure the temperature and the pressure seperately via different programs (VIs) but I want to measure pressure and temperature simultaneously. When I combine my two VIs the program comes out an error which I read "error-410" (Query interruption) on the monitor of agilent 34970A. I added the VIs at the attchment section. Agilent_Basinc_ilk.vi (for pressure measurement) and Agilent_sicaklik_il.vi (for temperature measurement) VIs work well without problem on the other hand Agilent_Sicaklik_ve_Basinc_Ilk_v2 VI does not work as others do. Why does this error occur? Is not posible to measure pressure and temperature measurement at the same time via one VI?

[Dennis_Knutson]

The instrument does not allow simultaneous measurements. For that matter, GPIB in general does not allow it either. You must sequentially perform them just like the advanced scan example does.

[newbieeng]

To implement pressure and temperature measurement which changes do I have to on advanced scan vi? Instead of using voltage and resistance configure vis, which come from instrument driver, should I change them with temperature and current configuration vis? and is it possible to calculate or learn how many times pass between temperature and pressure scans?

[Dennis_Knutson]

Yes, you can replace the functions in the example. Just be sure to save the changes with a new name and in a new location.

Not sure exactly what you mean but you should be able to set some criteria with the comparison functions to use with the measured values.

[newbieeng]

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@Dennis_Knutson wrote:

Yes, you can replace the functions in the example. Just be sure to save the changes with a new name and in a new location.

Not sure exactly what you mean but you should be able to set some criteria with the comparison functions to use with the measured values.

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I mean that this device-Agilent 34970A- scans the module in it mechanically. It scans the channnels on it step-by-step. I wonder that how many seconds pass during the scan of between two channels? Is it possible to calculate or measure in the labview program?

[Dennis_Knutson]

I know that the channel delay is settable with the Conf Scan function but I don't recall what the actual minimum delay is. It would be in the manual.

[newbieeng]

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@Dennis_Knutson wrote:

I know that the channel delay is settable with the Conf Scan function but I don't recall what the actual minimum delay is. It would be in the manual.

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Also when I modified the Advance Scan VI and run it, it came out an error. When I read error codes from the device monitor, it showed 3 errors and 1st and 2nd errors' code were 521 (input buffer overflow), 3rd error code was 113 (empty scan list). I really do not understood where I did wrong. The VI that I run is attached below. Could you help me on this?

[nyc_(is_out_of_here)]

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@newbieeng wrote:

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@Dennis_Knutson wrote:

I know that the channel delay is settable with the Conf Scan function but I don't recall what the actual minimum delay is. It would be in the manual.

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Also when I modified the Advance Scan VI and run it, it came out an error. When I read error codes from the device monitor, it showed 3 errors and 1st and 2nd errors' code were 521 (input buffer overflow), 3rd error code was 113 (empty scan list). I really do not understood where I did wrong. The VI that I run is attached below. Could you help me on this?

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Your problem is that you are blindly running and modifying VIs without any understanding of how the instrument works.

Perhaps you should considering reading the manual to understand the operation of the instrument better and also understand what SCPI commands are being sent by this VI you are using.

[Dennis_Knutson]

On the front panel of the VI, the channel lists are empty. What did you actually use?

[newbieeng]

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@Dennis_Knutson wrote:

On the front panel of the VI, the channel lists are empty. What did you actually use?

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Ok, I realized that and after it, I filled them but the same error (error 521) occured again.