Error 200077 Strain Gage Calibration: 10v Excitation entered but accuses me of "Requesting" 648.474427e-3

[OKors]

I realize Error "200077" is a generic error for invalid or unsupported values (whatever they may be). But the values it "THINKS" I've entered are odd.  

This is all new hardware that I'm still learning how to use so please be patient.

I'm trying to configure a full-bridge strain channel in MAX. So far I can see the strain signal in the preview graph at the top of the Configuration/StrainSetup window (before calibration). I've left all values in the Strain Setup tab at the default values except the excitation which I've set to 10, and Full Bridge Configuration= Full Bridge I. Then I go to DEVICE tab (all values default), select Calibration... again everything is default- checks in both Enable Offset and Enable Shunt boxes, Shunt R3 @ 100k.  Click NEXT, and the wizard takes the first measurement for me and returns some values in the table. When I click Calibrate it returns an error:

---

Error-200077 occurred at Strain Gage Calibration

Possible Reason(s):

Measurements: requested value is not a supported value for this property.

Property: AI.Excit.ActualVal

You Have Requested: 648.474427e-3

Valid Values Begin with: 9.497559

Valid Values End with: 10.497559

Channel Name: FullBridgeTest

---

I've got a DVM connected to the P+/P- terminals on the 1314 terminal block and I can 'see' 10v. If I change the excitation in the Setup to 5v I can see 5 volts at the meter but the error returns during calibration again, accusing me of Requesting: 463.784023e-3.

So just for fun I put in 15v excitation and click Calibration... this time the error pops up immediately; telling me:

You Have Requested: 15.000000

Valid Values Begin with: 0.000000

Valid Values End with: 10.000000

So I can clearly see that it's registering 15volts as a user defined entry but seems to have issues at 10v and below.

[HeatherBaker]

Hi Okors,

In the Strain Setup tab, you will need to set your own min/max values for the signal input range.  Also take a look at this link as it might provide a better explanation about the error http://digital.ni.com/public.nsf/allkb/440EB533229211CD8625711C007E61B3?OpenDocument Is all of your hardware connected when you try to perform the calibration?  You will also need to change the Gage Resistance since it is specific to your strain gauge.

[OKors]

It looks like that document addresses Input Range conflicts. The specific error I'm getting is for Excitation.  

I've experimented with multiple input ranges nothing seems to affect that particular error.

Yes, all of my hardware is hooked up during calibration.

G.F. of the gage is 2.1, default value is 2, so it's not off by much. This is just a practice test anyway, we're not collecting any real data with this. I just need the practice setting up and getting familiar with Signal Express and the SCXI hardware.

...so based on that, my problem still exists.

[HeatherBaker]

The 1520 has internal excitation available.  Try changing that setting in your set up to see if you still receive the same error.  As a side note, both the Gage Factor and Gage Resistance are strain gauge specific so be sure and change both of those when you need to take measurements.

Have a nice evening!

[OKors]

I have internal excitation selected.

As mentioned in my first post I can even measure with a DVM 10volts coming from the P+ and P- of the terminal block.

[HeatherBaker]

Good evening Okors,

Let's make sure all of the physical connections are as expected in page 25 of the SCXI 1520 manual.  Verify the excitation voltage is correct based on your sensor resistance on page 36.  Finally create a task in Measurement and Automation Explorer as detailed on page 41 and attempt the calibration to see if you still receive the error.  The process will be almost identical to Signal Express; however, it will provide us another point of reference. 

[hkm]

Dear Sir

I have the same error 200077. But instead of changing value, I was instructed to change bridge configuration from Full bridge to quarter bridge, even though I'm using quarter bridge from the beginning. I used this technique before without problem, but lately it start to show error message.

I attach a word file to show picture of the error. I'm using NI9235 and NI9236 C series module with NI compactDAQ. Please advice.

Thank you

regards

[Frank-L]

hkm,

Unfortunately, this issue is currently involving a Corrective Action Request that is slated to be fixed in the next version of DAQmx. Although you can fix this issue now by downgrading from DAQmx 9.2.x to DAQmx 9.1.0 which will solve this problem. The new version of DAQmx should be coming out in the next few weeks which will allow you to simply upgrade and get the calibration fixed. Downgrading will work, but will require you to uninstall DAQmx and then reinstall to DAQmx 9.1.0. 

Thanks!

[Frank-L]

hkm,

I went ahead and double checked for you that this issue has been resolved. If you check out the DAQmx 9.3 Readme, you will see that the issue that you are seeing has been resolved in the next version of DAQmx. You can download DAQmx 9.3, and this should fix your issue! Have a great day!

248436

Using the DAQ Assistant to calibrate a strain channel on the NI 9235/6 gives error -200077

[22322]

The 1520 has internal excitation available.. I tried with changing the settings 10v Excitation but 200077 Error is still showing.