Adash America A3900 1 channel Online Condition Monitoring with Display

• Machine monitoring systems
• Simultaneous measurement of velocity (mm/s, ips) and acceleration (g)
• Relay for indication of exceeding the predefined vibration limits (ALARM, ALERT)
• Measured quantities are exported as output current loops 4-20 mA
• Simple connection to control systems (PLC)

The simple machine (e.g. grinder) is often used for demonstration purposes. The exceeding of limit switches off the machine. It is important, that the machine has to have the special circuit breaker cold Magnetic Safety Switch. These switches automatically shut down when the power unexpectedly goes off. When the electricity comes back on, the equipment will not start up until you press the start button. 

When the powering is interrupted (vibration higher then limit), then this breaker has to switch off itself and must be switched on manually. If the breaker has not this feature, then the A3900 continuously switch off and switch on the machine. That is why the vibration level decreases under limit, when the machine is switched off.

Scheme