Recording Electrical Measurements

fahimk

Involved In Discussions
#1
Dear Fellows,

How do you ensure repeatability when recording the electrical measurements?

Example case:
Suppose i am calibrating a Fluke Digital Multimeter using Fluke Multi-product Calibrator.

Will it be okay if i take six measurements, in case of voltage, in the following order?
1) Taking measurements in an ascending order (1 V, 2V, 50 V, 100 V ...)
2) Taking measurements in a descending order (100 V, 50 V, 2 V, 1 V...)
3) Taking measurements in an ascending order (1 V, 2V, 50 V, 100 V ...)
.....

I have observed such methodology being applied for pressure measurements. Is it so for electrical measurements as well? Or, i am supposed to follow some other strategy while recording the electrical measurements in the Data Sheet....

Thanks; looking forward....
 
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dwperron

Trusted Information Resource
#2
Dear Fellows,

How do you ensure repeatability when recording the electrical measurements?

Example case:
Suppose i am calibrating a Fluke Digital Multimeter using Fluke Multi-product Calibrator.

Will it be okay if i take six measurements, in case of voltage, in the following order?
1) Taking measurements in an ascending order (1 V, 2V, 50 V, 100 V ...)
2) Taking measurements in a descending order (100 V, 50 V, 2 V, 1 V...)
3) Taking measurements in an ascending order (1 V, 2V, 50 V, 100 V ...)
.....

I have observed such methodology being applied for pressure measurements. Is it so for electrical measurements as well? Or, i am supposed to follow some other strategy while recording the electrical measurements in the Data Sheet....

Thanks; looking forward....
What you are describing would be a test for hysteresis, not repeatability.
Hysteresis is not typically an issue with DMM's or calibrators.

What a repeatability test would entail is setting up the equipment to make the same measurement multiple times and reporting the deviation.
Having multiple technicians perform this task will give you reproducibility results.
 

fahimk

Involved In Discussions
#3
Thanks for responding.
So, what are the techniques followed to ensure repeatability when it comes to electrical measurements?
 
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