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ATF-6149
VS228 Hybrid Multimeter
RPM measurement for automotive engines with 2 to 10 Cylinders using the inductive Pick-up
Oversized high contrast 6000 counts LCD display with backlight
14 Functions including DCV,ACV,DCA,ACA,Resistance,RPM(Tach),ms-pulse,Dwell angle,Duty cycle,Frequency,Temperature(℃/℉),Capacitance, Continuity and Diode Check
Read pulse duty cycle and dwell angle for electronic fuel injection feedback carburetors, and ignition
Data Hold and Peak Hold Functions
Over-range indication
Auto Power Off
Fused current inputs and Overload protection on all ranges
Measure Milliseconds pulse width to test on-time of fuel injectors, idle air control motors, and electronic transmission controls.
Dust and waterproof
Tach(rpm) 2-10cyl, 4-Stroke 60-9000 (x1)rpm, 600-12000 (x10)rpm 
Dwell 4/5/6/8cyl
AC Voltage 600mV/6V/60/ 600V/ 750V  
DC Voltage 600mV/6V/60/600V/1000V  
AC Current 60mA/600mA/ 6A/20A
DC Current 60mA/600mA/6A/20A
Capacitance 10nF~60mF 
Frequency 0.001Hz-9.99MHz
Duty Cycle 1.0-99.0%
Pulse width 0.1-10ms
Resistance 600Ω~60MΩ
Temperature -20 to +760°C, -4 to +1400°F