Richards

In a sequence marked Auto-Start i have put :global tareOffset = 0 Then create a conversion :Value - tareOffset Then create a Quick Sequence action and put: tareOffset = (myWeightChannel + tareOffset) As soon i make the conversion , the weight channel on the graph is stuck to 0 before i hit the tare weight button. i dont understand :''Then create a conversion for your weight channel'' and ''Then apply that conversion to your weight channel'' i all ready have a conversion for the weight channel, do i have to create a second one.

Wen you say 'global variable' do you mean a variable value in the display, and i dont see 'sequence marked Auto-Start' is it a sequences in the workspace?

I have try different thing to tare the weight on the Y axis with a button with no success, i have try: button action ,set to, action channel whrite different thing ,but probably the wrong formulation. any help.

This is the breakout board , but if the LJTick-InAmp would be more appropriate ,i will go for it. i am very novice in programation. Description:- The Load Cell is breakout board for the HX711 IC that allows you to easily read load cells to measure weight.- By connecting the to read the changes in the resistance of the load cell and calibration you’ll be able very accurate weight measurements.- This creating your own industrial scale, process control, or simple presence .- The HX711 uses wire interface (Clock and Data) .- Any ’s GPIO pins should numerous libraries have been written making to read data from the HX711.Specification:- Automatic reset circuit- Simple digital control and serial communication: All are controlled by input pins, the chip registers without programming- Selectable output of 10Hz or 80Hz- Simultaneous rejection of 50Hz and 60Hz power interference- Power consumption (including circuit): Typical operating current:- Operating voltage range: 2.6 ~ 5.5V- Operating temperature range: -20 ~ + 85 ℃

Can you point me to the basic setup to hookup a load cell amp HX711 to the labjack U3.

The load cell by itself use 2 channels, how do i arrange that in the gragh. Wen you say (collect the two data points from the LabJack at the same data rate) are you refering at the ''timing'' in the channel page?

My project is to built a shock absorber dynamometer The load of the shock will be capture by a S type load cell that will be represent in lbs on the Y on the graph, The stroke of the shock will be capture by a rod displacement sensor that will represent the velocity vs time on the X on the graph, The 2 sensors will be capture with a labjack u3-hv Is it something doable. I include a picture of the graph .