Sensor Info

[Bohdan L Bodnar]

>Does anybody have any hard data on the electrical characteristic of the 52mm
>Hitachi MAF sensor?  I've got one on the way but I want to simulate voltages on
>a function generator so I can get the bugs out of my A/D conversion while I'm
>waiting for it.

If this is the same one that GM uses (I think it is), then get rid of the a/d
converter and put in a frequency counter.  There are three leads:  signal
ground, signal return, and 5.0 volts reference.  No-flow frequency is around
140 Hz (measured on my 1995 Ciera).  Typical operating frequencies are around
3 kHz.

Although I don't have any flow (e.g., g/sec) vs. frequency specs, I may be
able to dig something up from GM's training literature

>Thanks,
>
>Jeff Giberstein -- jefe at dartmouth.edu

You're quite welcome!

Bohdan Bodnar
bohdan.l.bodnar at att.com