SURFACE SPEED METER、CONTACT TACHOMETER

display: 5 digits 18mm(0.6") lcd
accuracy: ±(0.05%+1 digit)
sampling time: 0.5 sec(over 120rpm)
range se-lect: auto - ranging
memory: last value,max. value,min.value
test base: 6mhz quartz crystal
power consumption: approx 45ma
measurement:
contact tach 0.5 to 19,999rpm
surface speed(m/min) 0.05 to 1,999.9(m/min)
surface speed(ft/min) 0.2 to 6,560ft/min
resolution:
contact tach :0.1rpm(0.5 to 999.9rpm)
　　　　　　　　1rpm(over 1,000rpm)
surface speed:0.01m/min(0.05 to 99.99m/min)
　　　　　　　　　0.1m/min(over 100m/min)
surface speed: 0.1ft/min(0.1 to 999.9ft/min)
　　　　　　　　　1ft/min(over 1,000ft/min)
power: 4x1.5v aa size battery