Please, would you clarify your needs.  It appears that you need a time totalizer while you intend to adjust a device for the maximum count.  See
http://www.jptechinc.com/prod_timetotal.htm
http://www.dynapar-encoders.com/c342/c342.html
for more info.

Jbartos, thanks for you responce. Here's what happening. I am going to set up a testing device that will test ten timer delay type device, each one has a control pot to adjust for min/max timing. I want two use a two totalrizer two read the min/max settings of each, switching from the first device min/max reading, then switch to the next device readings and so no, for example.

1 device display min    display max
    1         45.6 sec     245 sec.
    2         45.9 sec     248 sec.   
    3         49.6 sec     348 sec. out of tolorance
I am think I need some sort of memory to remember each test setting, boy I wish I know how to put a logic diag. on this thing. I could show you gjust what I wanting.

Nowadays, recorders are competing with computers having input/output cards and instrumentation/control software. The totalizers output could be monitored/recorded by computer/recorder. Notice that the recorders may have two pens and will show two curves, either on circular charts or on paper strip charts. This approach may be simpler; however, it may be viewed old-fashioned and turn out to be more expensive because of the paper chart cost. The computer will show it on the screen and save it in memory. This seems to have nature of the quality control. This may also be viewed under Computer Engineering since the measuring/checking setup may be implemented over computer/software.

Somebody could give me the theory oif operation of the IGbT, Insulated Gate Bipolar Transistors in a simple way ?

thanks
luis algarin

jbartos, you've kind of got what I am looking for and what to go to, I know there's got to be some pre-made software around to do this It would make things a lot easer to deal with. I got the people I am dealing convence to buy the computer, I've got to find a interface to link my test panel to the computer along with some software, got any Ideas.
I sure do thank you for working with me, ther not a lot of high-tech folk around, O sorry for all the bad writing, I've been avg. about four hrs. sleep per day because of all the

To Algarin Feb 13, 2001:
1. Try Key Word Search in this spectrum and type IGBT
2. Suggestion: There are many web sites with good information and
                         explanations:
                         http://www.igbt-module.com/
                         http://www.igbt-driver.com/english/default.shtml
                         http://www.pcim.com/articles/1997/art0021/art1.htm
                         http://www.irf.com/technical-info/an990/an-990p5.htm
                         http://www.irf.com/L3Me5a_c/technical-info/designtp/dtwarp.html
                         http://www.elec.gla.ac.uk/groups/dev_mod/papers/igbt/igbt.html
                         Visit them for more info
To DC Feb 15, 2001:
1. It is good to have the software aligned with PC I/O card. The manufacture of that card could provide software or its manufacturer. I could mention one but I could be off.
2. Try the manufacturers over:
http://www.thomasregister.com
under Product / Service type I/O for many leads and choices.