I found some instructions on testing the voltage on the RX7 ABS sensors. Apparently you need to measure millivolts (50-60) when the wheel is spinning, but I can't get a reading on either of my front sensors.
Is this something any multimeter can do? Should it be AC or DC?
I believe those are VR sensors, and their output should be AC volts, which will rise in both frequency and voltage with increasing wheel speed.
OK, so looking at the multimeter i have, i really need one that is more sensitive and reads AC millivolts e.g. V~ 200m?
That is probably true.
I just noticed yours has only 200v and 600vAC ranges.
Fluke makes excellent meters, and the more basic ones aren't really expensive, and have good auto-ranging functions.
I have several I've accumulated over the years.
That is probably true.
I just noticed yours has only 200v and 600vAC ranges.
Fluke makes excellent meters, and the more basic ones aren't really expensive, and have good auto-ranging functions.
I have several I've accumulated over the years.
I had a bit more of a look into this earlier, and it looks like multimeters don't really measure AC millivolts. WHilst looking at that I noticed that you may actually need some expensive kit like an oscillisope or Picoscope. That might be for differnt style sensors though. I got confused at this point
That is probably true.
I just noticed yours has only 200v and 600vAC ranges.
Fluke makes excellent meters, and the more basic ones aren't really expensive, and have good auto-ranging functions.
I have several I've accumulated over the years.
I had a bit more of a look into this earlier, and it looks like multimeters don't really measure AC millivolts. WHilst looking at that I noticed that you may actually need some expensive kit like an oscillisope or Picoscope. That might be for differnt style sensors though. I got confused at this point
Multimeters are sort of inherently imprecise because they're such a do-all type of tool. Like Cobra said you can probably get a reading of some sort with a quality auto-range meter, but as your research was telling you if you need to be actually accurate with this you probably need a scope to do it.
If that one will measure down to .1mv AC, it should tell you if the sensor is producing an output.
It'd be nice to have one that would measure frequency as well.
A scope would give you the whole picture, but is a lot more money.
I've heard of scope adapters that interface with a smartphone, but never really looked into one myself.