Verify Calibration of instron load cell.
Verify Calibration of instron load cell.
(OP)
is there a way of doing a sanity check that a load cell is still in calibration. some one mentioned putting load cell upside down and placing a known calibration weight on it? is there a better way?





RE: Verify Calibration of instron load cell.
RE: Verify Calibration of instron load cell.
RE: Verify Calibration of instron load cell.
Cheers
RE: Verify Calibration of instron load cell.
Applying a known force is what Instron will do at their lab, so nothing wrong with just putting a known weight on top.
Check more than one point.
Instron should give you "as-found" and "as-returned" cal plots. So you could correct your recorded data if it was way off.
RE: Verify Calibration of instron load cell.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Verify Calibration of instron load cell.
As mentioned by CoryPad: it might be more representative and also more stable to rather suspend/hang the weight.
Regards
G
RE: Verify Calibration of instron load cell.
1) Is your query regarding tensile or compression?
2) What is the capacity of the load cell?
You will need to check it in the same direction and depending on the capacity you may be able to check with weights.
It may be that the cell has been overloaded and then you can get different results in each direction.
RE: Verify Calibration of instron load cell.
RE: Verify Calibration of instron load cell.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Verify Calibration of instron load cell.
No problem you need to turn the load cell upside down and load the end stud with weights to simulate the compression mode. Ensure that the weight is centred on the load cell stud (some load cells are sensitive to off-centre loading.)
Max 10kg will be enough (100N / 9.81). I would suggest using different weights to check for linearity.
Testing machine load cells should normally be accurate from 0.2% of the maximum capacity upwards, but if you make a check at aprox 20%, 50% and 100% this will be enough for a confidence check.