oil pressure sensor

[polarjbl]

I am using a new type oil pressure sensor (Rotax 2 wire) and I have a couple of questions.
I wired it, but I haven´t found a 200 ohm resistor, only a standar 220 ohm. Are there any problem ?
The red wire I connected it to pin 15, but there was another wire. Any problem?

Regards
JBL

 

[dynonsupport]

If you do not use a 200 ohm resistor, you will have errors in your reading. Since a 220 ohm is about 10% greater than 200, all your readings will be off by about 10%.

What color were your other wires? We just want to make sure that you are using the sensor we expect, since the one we tested with had only two wires.

 

[airguy]

Polar - if you cannot find the 200 ohm resistor you need, and you can handle the idea of a small amount of error, I suggest you use 4 resistors in series of 49 ohms value (a common resistor value, easy to find), this will give you 196 ohms and a 2% errror, as versus 220 ohms with a 10% error.

 

[dynonsupport]

Unfortunately, 47 ohms is the common one, not 49.

A better solution might be a 220 in parallel with a 2200 (2.2k). Both are common values and this combo gives you exactly 200 ohms.

 

[PhantomPholly]

Or two 100 Ohm in series. The example above seems too much like voodoo math to me...