Tachometer Tester Selection Matrix

Table RPM Range RPM Accuracy Units Drive Outlet
Series 1790 Tachometer Tester

Testing and calibration of electrical and mechanical tachometer generators and indicators

250-10,000 ±1 RPM RPM ot Percentage Qty 1 - 1/4 inch square hole drive (AN Pad)
Series 1921 Tachometer Tester

Testing and calibration of electrical and mechanical tachometer generators and indicators

10-50,000 0.1% (10-199.99 RPM) 0.005% (200-50,000 RPM RPM, Inches/Min, Feet/Min, Yards/Min, Meters/Min Qty 2 - 1/4 inch diameter shafts