Richards

In  2 variables value component can i record the max and min peak value for my load cell.

As you explain me in a earlier tread how to tare the load cell:

global tareOffset = 0

Then create a conversion for your weight channel:

Value - tareOffset

Then apply that conversion to your weight channel.

Finally, in your button for setting the Tare, create a Quick Sequence action and put:

tareOffset = (myWeightChannel + tareOffset)

It work good when i graph at low speed.

When i stream , it does not show anything on the graph

except if i remove the '' tareOffset'' in my conversion channel.

But then the tareOffset does not work.

I have change the channel # in the 2 places, with no succes.

It work ok for AIN channel but not with FIO .

What does mean the 3 ''0'' in the line :CHANNEL, 3, 0, 0, 0

3 is the channel #, but after that?

I want to stream ''FIO4'' channel in that command: AddRequest(0, LJ_ioADD_STREAM_CHANNEL, 3, 0, 0, 0)

i have replace #3 by #4 and it does not work.

I have a lot of noise streaming my 2 channels ,since i have a high conversion value, it increase the signal

and the noise at the same time, should it be better to amplify the signal at the source, or is there a way to filter

that signal.

Ok i find the problem there whas a typo in the sequence,

it work fine.

I am using the U3-HV , there is just a green led solid on ,no blinking led.

If i put the channels timing to let say 0.5 i have a trace, but it does no stream 

from the labjack as it is slow.

With the timing at 0 like specify in the guide i have no traces.

There is no data ,no trace graphing,

if the sequence  will run quickly and stop, why is there a stop button mention in  section 9.2.2 .

I have copy,paste the link in the sequence , and now , wen i begin the sequence it goes on for a fraction of a second and goes of ,

there's a bit of amelioration. 

Well, wen i start the ''startstream'' it does not start ,no trace.

i have check the path of the labjackud.h, it is in the  ("c:\program files(x86)\LabJack\Drivers\labjackud.h")

i am not sure if the (x86) is important , but it it does not work with that location.

I have try the high speed streaming as show in section 9.2.2 of the lj AppGuide with no success.

I have include the document .

shock dyno Stream2.ctl

I have put that in the trace X expression and it invert the voltage ,

but the positive do no stay positive.

Is there a formula to invert a DC voltage from neg. to pos.

Let say the voltage comming in from one channel is +0.5V keep it like that.

from the same channel if the voltage is -0.5V invert it to +0.5V .

I have try it different way , it does no work, wen i put  1111  the graph value is stuck at 1111  .

Tank you for your support everything is working perfect.

I have and other question : my velocity sensor is a magnet inside a coil, so wen it is going in it generate a positive voltage and wen it is going out a negative voltage.

That is representing a graph with the 0 value in the center like the (graph-2)

i would like to graph like (graph-1).

I am not sure if it is and hardware issue.

Yes, i have re- Email it.

I have send the document by Email.

Here are 2 capture.

I have put that in a button component under quick sequence and it does not work.

component.myGraph.XAxisFrozen = 1 , i have rename ''mygraph''

Is there a formula in a quick sequence of a button to stop (freeze) the traces in the graph.

Wen i load a logging file, it's open by default in daqfatory not express version that i am using, i have try the solution wrote in section 14.6 in the usersguide with no success.

Let say the shock is stroking up and down , the traces on the graph start simultaneously.

Is there a way with a button to start the traces at a precise moment.

Tank's for your help it work fine.

I think the problem is in these 2 places,

Wen i create a conversion and apply it to my weight channel i suppose

i have to create and other channel to apply it to,

Is it important the name i give it to?

I replace the name ''weight'' by force: the name of my channel.