... test bench of speed, temperature, frequency, air pressure, toothed bar stroke as well as parameters.2 LCD display3 Speed variable frequency ... control, motor direct drive4 Test each cylinder's delivery at various rotation ... testTechnical parameters1 Power: 5.5-30KW2 Voltage: 380,220V3 Frequency: 50/60Hz4 Protection level: IP545 Speed range: 0--- ...