Pneumatic & Electrical Torque Tool - Calibration/Verification of 'Power Tools'

Jeenan

Involved In Discussions
#1
Hi,

First, happy that the Forum is back.....:applause::thanks::magic:

We have discussion here concerning calibration / verification of 'Power tool'

When we check a Pneumatic Torque Tool (such as Cleco or Atlas Copco), we take 10 readings

When we check Electrical Torque Tool (Atlas Copco Power Focus) we take 20 readings....

Guess my questions.....Should we take 10 or 20 readings......

Precision: Both Power Tools are checker a ONE calibration point
Pneumatic is 'preset' and Electrical have preset program, so the calibration point is about midway in the range...

:thanx:
 
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dwperron

Trusted Information Resource
#2
Here's what I found:

ISO 5393 calls for 25 measurements each on a low and high torque rate joint.

Atlas Copco follows ISO 5393.

Cleco's procedure uses an average of 10 measurements in their calibrations.
 

Jeenan

Involved In Discussions
#3
In my comprehension, ISO 5393 is for 'performance' (when they come out of the factory)....And that's why the call for High & Low joint

But, since, they are 'preset' to a certain value, we check them every 3 months

Average must be within 5% and scattering within 10%

But.....is 10 enough....or we need 20....or 25.....
 
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