V&P Scientific, Inc.
3
Technical Note 329A
Connecting the Control Unit to the Tumble Stirrer:
Attach the connection cable (two plugs, one blue and one black) that transfers power between
the Tumble Stirrer and the Control Unit into the connection ports on the motor end of the Tumble
Stirrer. Attach the power cord to the Control Unit, then plug into appropriate power outlet.
Plug connection cable to the connection ports on motor end of Tumble Stirrer.
Plug power cord to the power cable port (left). Manual speed control features (right).
TUMBLE STIRRER OPERATION
The control unit for the stirrer has an ON/OFF power switch and a speed control knob. The
maximum speed is set at the factory to 1500 RPM with no load. The RPM display is a true RPM
reading. Adding a load (magnetic resistance), such as aluminum around the magnetic cylinder end
of the Tumble Stirrer, will directly affect speed. The controller is programmed to compensate by
adding more power to maintain the same RPM that is set. If there is substantial magnetic
resistance, such as aluminum, keep the stirrer speed at no more than 750 RPM.
The optimal operating speed of the Tumble Stirrer is dependent upon the particular
application to be used and needs to be empirically determined.
Control Unit Back View
Power
Cord
Power
Cable
Port
USB Port
(For Factory
Purposes)
Power
On/Off
Switch
Control Unit Front View
Speed
Control Knob
LCD with
RPM Meter
Connection
Cable
