286 Vindication

[Mark Boxsell]

At 10:22 AM 16/02/96 -0500, you wrote:
>Item Subject: Meddelandetext
>>  When I get it all together I'll post it on the web Page... Besides I'm going
>
>>to use a MPX2200, A motorola pressure sensor rated for 200KPA, with .2mV per 
>>KPA, it has thermal recalibration, and as a plus It has differential input so 
>>that the values stay pretty good across the spectrum. I op amp it so that It's
>
>>span is 2V with an offset of .25V, it's great!!!!
>
>Hello!
>
>Seemes as you are going to do something that I have already done when reading
>MAP.
>Warning; is it a MPX2200DP? It reads differential pressures. You need absolute
>pressure. I had to use the MPX200AP thats absolute w/o temp compensation. Since
>Motorola did'nt have any compensated one year ago. I use turbo press up to 1,5
>bar but when calibrating the MPX200 it streched it's linear area 1 bar over the
>specified so it's still useable. The temp comp wont be any big problem i think.
>When i calculated on it it follows the compensation for airtemp vs density that
>you anyhow must do in your software (or maby in hardware is possible to of
>course), so its near to automatic, but maby a bit slow! That is if you  apply
>inucted airtemp to the MAP sensor of course (how that is done???). Tell me how
>you intend to dampen the MAP signal? Mecanical or electronical, thats one of my
>problems. 
>
>Keep up good work, please tell me if its a new AP on the market!
>
>Tommy Palm
>tommy.palm at oron.ds.sll.se
>Sweden 
>>
>>
>
If you are not going up and down mountains all day a differential sensor
will work fine.
                                 regards,
                                                Mark Boxsell
                                                MRB Design.