Troubleshooting a 350 Ohm Strain Gauge Installation

Click For Summary

Discussion Overview

The discussion revolves around troubleshooting an installation issue with a 350 ohm strain gauge. Participants are examining the electrical measurements taken between various terminals and seeking insights into potential problems with the setup.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant reports measuring 350 ohms between several terminal pairs but finds an open loop when measuring between terminals 1 and 2, which they describe as an unusual problem.
  • Another participant requests a link to the spec sheets for the strain gauge to better understand the issue.
  • A third participant expresses skepticism about the situation, suggesting it seems impossible based on the reported measurements.
  • The original poster clarifies that they believe the strain gauge itself is not at fault and shares the specific model being used, along with a link to its specifications.
  • Another participant asks for specifications related to the assembly shown in the photograph, indicating that it may be more complex than a basic strain gauge setup.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the cause of the issue. There are multiple competing views regarding the validity of the measurements and the potential complexity of the setup.

Contextual Notes

Some assumptions about the setup and the strain gauge's specifications may be missing, and there is uncertainty regarding the implications of the measurements taken.

Matt2015
Messages
3
Reaction score
0
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
 
Engineering news on Phys.org
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
 

Attachments

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.
 

Similar threads

Replies
4
Views
2K
  • · Replies 3 ·
Replies
3
Views
4K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
7K
Replies
12
Views
3K
  • Poll Poll
  • · Replies 15 ·
Replies
15
Views
8K
  • · Replies 61 ·
3
Replies
61
Views
5K
  • · Replies 1 ·
Replies
1
Views
3K
Replies
6
Views
2K