Set Zero

[Jan_Enden]

Hello,

At the moment i am putting values of a force sensor in a graph.

When i am going to use the sensor the start value should be set to zero so that i know how much force is applied.

Does anybody know a function for setting the current value to zero?

kind regards,

Jan

[GerdW]

Hi Jan,

simple "ZERO" feature: store a force value in a shift register and subtract it from all following force readings…

[Jan_Enden]

i haven't found this feature yet

can you maybe show where i can find it?

[GerdW]

Hi Jan,

"shift registers" are a VERY BASIC LabVIEW concept. You find explanations in the LabVIEW help!

[Jan_Enden]

yeah i know a bit about the shift registers, but can you lock a value?

because if the values change the 'locked' value should be subtracted.

[GerdW]

Hi Jan,

yeah i know a bit about the shift registers, but can you lock a value?

Yes, sure!

You could use a case structure (or a select function) to decide, which value to write into the shift register for the next iteration: use a new one or keep the previous one…

[altenbach]

Here's one possible way. This is really basic so I recommend continuing with the tutorials...

(Be aware of mechanical action settings too)

[RavensFan]

What you are asking for is often known as a "tare" function.  That term might help you when searching the forums.

[wiebe@CARYA]

Often does sensors have a tare function...

If it's a pure analog value, it won't. If it has a communication protocol, it's likely.