Hi Peter; It looks as if the inavailability of the high voltage op-amp I was going to use will make me use just a part of the a/d range of a 7i76D first 4 inputs.
And, the relative lack of data for the MAP sensor I have two of, might be a limitation too. The data is sparse, but what has me thinking is the maximum current available at its output is shown as .1 milliamp, at full scale which would roughly correspond to around 23 psig, or 38 psia, which is what its actually measureing. And I want to regulate the pwm to a bank of teeny conpressors that can do at least 10 psig, to around 4 or 5 psig. So rangewise its doable. Since the max output currant is .1 milliamps, and I need to subtract ambient pressure from whatever I measure when the conpressors are off. This isn't super critical and its something I can do in the setup for the program. So my question then is how big a load is the a/d when doing the a/d for for a 2 to 3 volt signal from the MAP sensor? Thanks Peter. Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
