Speed or Position sensors

Instructions:

1.obtain an electronic inductive distributor

2.visually inspect condition

   Was in good condition

3.Test ignition primary ampifying module for sevice ability

  within spec

4.Test pickup (trigger) coil for serviceability

   able to be serviced

NOTE: cold is from -10 degrees C and 50 degrees C

		Specs Toyota (ohms)	Actual (ohms)	Serviceable?
G pick up coil (G+  ,   G-)	Cold	185-275	243	YES
NE Pickup coil (NE+   ,   NE-)	cold	370-550	510	YES

Next i was asked to check the reluctor air gap on a Magnetic distributor to see if it was within spec or serviceable with a brass feeler gauge and got the readings below.

	Specifications	Actual	Serviceable?
G pickup coil	Air gap: 0.2-0.4 mm	0.305mm	YES
NE pickup coil	Air gap: 0.2-0.4 mm	0.325mm	YES

 I then Hooked up the distributor to a occiloscope in which i could see a waveform on the screen.

This sort of wave is an AC waveform which shows me that as i turn the shaft of the distributor the Magnetic field is changing from negative to positive simultaneously therefore giving negative and positive voltages. The amount of waves on the screen depends on the speed of the rotation of the shaft i.e. the faster the shaft spins the more waveforms on screen. This waveform ca
 give you some valuable readings e.g. RPM                                    
































Hall effect sensors

I wired up a Hall effect distributor shown in the workbook to an occiliscope using a 5v supply to receive a waveform and got this waveform to the left.

This wave form shows itsa switching type because as it spins to a certain point (degree) it switches to 4.5v and then as soon as it moves 45 dgrees more it switches back to 1.1v and so on.