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Inline Weigh Scale “rectangular wave” output

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BSB78

Chemical
Joined
Jun 12, 2019
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Location
US
I have a inline weigh scale producing a “rectangular wave” output for weight over time... I am confident the product is not actually changing weight like this. The bandwidth of the waves is generally 3.5-5 minutes. What can possibly be causing this?
 
What kind of output should the weigh scale produce?
 
What is the offset of the step, in % of full scale reading?

The time scale suggests a thermal time constant...but just guessing.
 
Do you have a digital system collecting the data? If it is a small step it might be an A/D flipping state.
 
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