Wheatstone Bridge Phidget - "Tare" button

Comments & issues
Post Reply
indianapolisjones
Fresh meat
Posts: 1
Joined: Sun Dec 09, 2018 1:32 pm
Contact:

Wheatstone Bridge Phidget - "Tare" button

Post by indianapolisjones »

I'm using a DAQ1500 and two strain gauges to measure torque on a shaft for a school project. I have done the "y = m * v/v + b" straight line calibration, but sometimes the y-intercept "b" value is off after removing/attaching the shaft, resulting in the zero-load value to be slightly non-zero. Is there an easy way to add a reset(tare) button for the b value?
jdecoux
Labview Developer
Posts: 161
Joined: Mon Nov 13, 2017 10:20 am
Contact:

Re: Wheatstone Bridge Phidget - "Tare" button

Post by jdecoux »

The easiest way to zero a load-cell based scale is to change your equation to "y = m (x - x0)" where x is the voltage ratio reading, and x0 is the voltage ratio of the scale you want to call zero.

It's the same equation, just formatted in such a way that it's very easy to change the value of x0 without additional calculations.
Post Reply

Who is online

Users browsing this forum: No registered users and 25 guests