Impulse Tachometer Wiring Diagram

If you have to make a new one the best material to use is soft iron from an old power or audio transformer but any mild steel will do.

Impulse tachometer wiring diagram. A switched 12 or 24 volt wire can be found coming from the ignition switch. Follow this wire to a junction and attach the wire from pin 4 at this junction i e. Refer to diagram d. Follow this wire to a junction and attach the wire from pin 4 at this junction i e.

Tachometer without display 13 gb 14 connector set 8 pin a2c59510850 30 terminal 30 steady state plus 12 v 15 terminal 15 connected ignition plus 58 terminal 58 lighting 31 terminal 31 ground designations in the wiring diagram. The pulse leads were in fact one continuous wire with a loop forming the primary winding of a transformer taken around a soft iron core projecting from the rear of the tachometer. The tach is a current sensing type signified by the i in smith s part number rvi 3410 00. Connect the wire from pin 4 to a switched 12 volt or 24 volt source.

Connect the wire from pin 4 to a switched 12 volt or 24 volt source. This is a good example of the impulse tachometer. Two pairs of connections were required one pair for the supply leads and the other for the pulse pick up leads. 8 pin connection f1 fuse 5a quick response c1 8 pin mqs connector you must comply with the.

The plastic former shown in the diagram holds the pulse lead in place and prevents the wire chafing against the case and shorting out. Connect a wire from pin 5 to a constant 12 or 24 volt source. A switched 12 or 24 volt wire can be found coming from the ignition switch. Input primary of t1 consists of an inductive link also.

Refer to diagram d. Magnetic circuit that allows the tachometer to sense pulses.