i did a search on here and on yahoo and didnt find any thing.

i just got the plx m500 wideband and i am going to use it for datalogging. i just cant get the voltage for the map sensor when it is in boost. i have the voltage for when then car is in vac.

i just need the rest to this:

map sensor voltage

.5v=-25hg
1v=-20
1.5v=-15
2v=-10
2.5v=-5
3v=0
3.5v=?
4v=?
4.5v=?
5v=?

 

It is linear. just convert everything to mbar, and figure it out, then covert the mbar to psi.

 

how do i do that? is there a equation to convert mbar to psi?

 

can some one just list the psi to volts for me or tell me what to do once a convert psi to mbar how to turn that in to volts. i need alot of help i am lost!!!

 

SPOON FED

map sensor voltage

.5v=-25hg
1v=-20
1.5v=-15
2v=-10
2.5v=-5
3v=0
3.5v=2.5psi
4v=?4.9psi
4.5v=?7.4psi
5v=?9.8psi

Those #'s don't sound right to me...although they are *close* - but based on the #'s you gave they are correct.

Points on a line equation.

y=mx+b
m= (y1-y2)/(x1-x2)
b=y intercept

References:
http://xtronics.com/reference/convert.htm
http://www.math.com/school/sub....html

 

you should be able to figure it out from this http://www.pgmfi.org/twiki/bin...ensor

 

1760mbar=4.96v 11.022 PSI
1700mbar=4,80v 10.152
1600mbar=4,52v 8.702
1500mbar=4,25v 7.252
1400mbar=3,97v 5.801
1300mbar=3,69v 4.351
1200mbar=3,42v 2.901
1100mbar=3,15v 1.45
1000mbar=2,87v 0.0
900mbar=2,60v -2.953 in/Hg
800mbar=2,32v -5.906
700mbar=2,05v -8.859
600mbar=1,77v -11.811995
500mbar=1,50v -14.764994
400mbar=1,22v -17.717993
300mbar=0,94v -20.670991
200mbar=0,67v -23.62399
100mbar=0,40v -26.576989