Installing a digital tach with PinzSSI 2.0
Posted: Sun Jul 14, 2019 2:10 pm
I finally got around to installing a tach in my 710M, which has PinzSSI 2.0. This unit has a 12 volt accessory output and a digital signal equal to one pulse for every revolution of the module, which is equal to half speed of the crankshaft.
I found directions on how to use a Fluke to calculate frequency. The module is rotating at 250 RPM (10X multiplier), therefore the engine is rotating at about 500 RPM, which is what the tach shows. Adjustments are made by changing the dip switches in the back of the tach housing. You can Google directions on how to set the dip switches based on your application.
Here is the tach showing 500 RPM, which is correct.
This is the final installation. The manufacturer recommends no power to the tach when the engine is off, so I installed a ground isolating switch. The voltage converter still supplies voltage to accessories when the key is off, only the ignition module itself is turned off. There is minimal parasitic drain, nothing that will kill a battery.
I bought the 12v tach online, and the housing on EBay. The tach is held in place by pressure fit, and can come out easily if necessary.
I found directions on how to use a Fluke to calculate frequency. The module is rotating at 250 RPM (10X multiplier), therefore the engine is rotating at about 500 RPM, which is what the tach shows. Adjustments are made by changing the dip switches in the back of the tach housing. You can Google directions on how to set the dip switches based on your application.
Here is the tach showing 500 RPM, which is correct.
This is the final installation. The manufacturer recommends no power to the tach when the engine is off, so I installed a ground isolating switch. The voltage converter still supplies voltage to accessories when the key is off, only the ignition module itself is turned off. There is minimal parasitic drain, nothing that will kill a battery.
I bought the 12v tach online, and the housing on EBay. The tach is held in place by pressure fit, and can come out easily if necessary.