The Alternator Tach which is also called the variable ratio tachometer, is hooked up to the AC output terminal on the alternator. This terminal can be marked in a variety of different ways: AC, AUX., S, R, TACH, or nothing at all. Once installed, the tach is then calibrated to that specific engine by using a shop tach or a known “no load” governor speed. The white label on this tach gives the formula: [Crankshaft pulley dia./alternator pulley dia x NO. of Alt. Poles = N] “N” is used to determine the correct switch setting. Another adjustment on the back allows for fine tuning.
- 4000 RPM
- Stainless steel silver bezel
- Fog resistant glass lens
- American Standard Resistance Reading
- Large Numerals – User Friendly
- Full 2 year Warranty – Satisfaction Guaranteed.
- Measures app. 4″ across including bezel
- Uses a 3 3/8″ cutout.
- Made exclusively for AC DC Brand Instruments by Faria-Beede® Instruments
- Works with Diesel engines
- 10,000 hour hourmeter
- Dial: Custom styles available
- Pointer: Back Lit with Hub
- Lens: Glass
- Bezel: Stainless Steel Bezel
- Display: 7 Character LCD
- Backlighting: Diffused LED light for display.
Graphics turn red when lit.
- Signal Input: Alternator Pickup
- Min. Frequency: 1 PPR (33.33 Hz)
- Max. Frequency: 200PPR (13,333 Hz)
- Wire Termination: Packard Connectors
- 4″ – Hole size: 3.375″ (85mm)
Made in The United States