condition check below low level

[cjaya.2]

Hi,

I have question, I wanted to check whether a condition has reached below threshold level. How many check do I need to do whether it has reached the level below. Does it need to be three check or do a 20 check and average out to see if it below that level. Is there better way of doing ? alogortihm perhaps.

 

[mƎALLEm]

Hello,

Do you mean a reading from ADC?

[Andrew Neil]

That all depends entirely on your particular situation,  application, and requirements - you haven't given enough information to make any specific suggestions.

 

[cjaya.2]

Thanks for the reply. I am measuring liquid level. if it below the level with sensor readings. whether it has reached low level from the sensor. 

[Andrew Neil]

So think about the nature of the signal you're getting, and the nature of the system you're controlling:

• How quickly does the signal change?
• Does the signal "jitter" up and down?
• Does it matter if you give a "low" indication a bit early/late?
• etc, etc, ...