Troubleshooting a 350 Ohm Strain Gauge Installation

AI Thread Summary
The user is troubleshooting a 350 ohm strain gauge installation, specifically the CEA-13-125UN-350 model, and is encountering an issue where they are not getting the expected 350 ohms between terminals 1 and 2, despite passing other terminal checks. They have verified the connections multiple times and received confirmation from peers that the setup appears correct. The user expresses frustration, feeling that the problem defies physics, and emphasizes that they believe the strain gauge itself is not at fault. Additional requests for specifications and details about the assembly indicate that the setup may be more complex than initially assumed. The discussion highlights a perplexing issue in strain gauge installation that remains unresolved.
Matt2015
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Hello,
I was wondering if anyone can help me out with this one. I am installing a 350 ohm strain gauge as shown in attached figure. I am expecting to see 350ohm value between terminal 1 and 2. I have checked the values for the following terminals.

1) 5 & 6 = 350ohm (PASS)
2) 3 & 4= 350ohm (PASS)
3) 3 & 2= 350ohm (PASS)
4) 4 & 1= 350ohm (PASS)
5) 5 & 1= 0.03ohm (CLOSED LOOP) (PASS)
6) 6 & 2=0.03ohm (CLOSED LOOP) (PASS)
Any Point (1,2,3,4,5,6) and 7 (Various place on the test strip) = OPEN LOOP (PASS)
1 & 2 = OPEN LOOP (FAIL!) NOT GETTING 350 Ohms

This seems to be unusual problem to have. I have personally tripled checked it. I have asked my friends to check it. Does anyone have an idea what I am doing wrong here.Thanks

upload_2015-4-1_16-34-5.png
 
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I suggest you provide a link to the spec sheets for the device.
 
I thought it was an April Fools joke as what he says should be impossible.
 
I wish it was an April Fools joke. But seriously, I feel like I am defying physics here. The strain gauge I am using is CEA-13-125UN-350. I have attached the specs here. But, I am sure its nothing to do with the strain gauge itself. But, then again I feel there is absolutely nothing wrong with the setup.http://www.vishaypg.com/docs/11224/125un.pdf
 

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Matt2015 said:
I have attached the specs here.

Do you have the specs for the assembly shown in the photograph? The assembly in the photograph is more than "basic strain gauge".
 
yes attached along with the previous post.
 
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