strange behaviour using auto-zero function

Joacim Rådstam

Posted on 10.01.2011 10:29
I'm using Dewesoft 7.0.1. When pushing the Zero button located at the top of the screen under the Measure tab I'm experiencing some unexpected behaviour. All my channels are set to Auto zero and should be zeroed when the Zero button is pressed. But when looking at the channel setup I find that the scale is way off, -2.9E5 when it should be approx. +/- 200. See channel 33 to 38 in the attached picture. Only after double clicking the zero button in the channel setup the zeroing is performed correctly, see channel 26 to 32. [img]http://forumbilder.se/show.aspx?iid=52020111117198377[/img] Is this a bug or am I doing it the wrong way?
Joacim Rådstam

Posted on 10.01.2011 10:32
This forum seems to dislike the linked image. It's located [url=http://forumbilder.se/show.aspx?iid=52020111117198377]here[/url] (http://forumbilder.se/show.aspx?iid=52020111117198377)
Jure Knez
President & cofounder
Posted on 17.01.2011 14:53
Sorry for late reply, but we are still not able to reproduce the problem you see. What we have tried: - define a sensor where the offset must be defined in setup (that it canbe zeroed) - set a channel to auto; - press zero (either in setup or during measurement). All the time in whatever version (7.0,7.0.1 or with latest 7.0.3) the result is fine. Therefore it must be something wrong with the specific setup which you are using. As I have seen from the screenshot you have some sensors which are blanked out. Perhaps it is better to communicate through support emails to see what part of the setup is causing this issue. We would need a small setup with fake scaling factors, because seeing the problem is half way to the solution. The first idea would be to try with latest released 7.0.2, but if we have such a setup to see error in 7.0.1, we can also see what caused the error.
Jure Knez
President & cofounder
Posted on 17.01.2011 15:03
When taking a second look, it really seems that the second card is causing the problems. We will build similar system and try to see if second card is causing the issue. But it would be still great to know what kind of scaling the sensors are using...
Joacim Rådstam

Posted on 18.01.2011 08:49
I blanked out some descriptive text not to disclose possibly sensitive information to the public. The scaling is set "by function" by entering the scale factor and the offset is initially set to 0. I posted the issue here believing it may be a known bug. But since it seems not to I will contact my local sales representative to investigate this problem further. Thank you.
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