Introduction; Assembly And Installation; Electrical Connection; Start-Up - Velp Scientifica F201A0150 PW Manual De Instrucciones

1. Introduction

Overhead stirrers are generally used for laboratory applications where the solubilization, mixing, suspension, emulsioning
and homogenization of samples is required.
The PW, LH, LS and ES overhead stirrers with electronic speed control and advanced safety features are able to satisfy the
most diverse needs of the laboratory in terms of both viscosity and volume.
The chuck is keyless and ensures a secure and easy-to-fit mount for stirring shafts of up to 10mm in diameter.
The stirring speed is electronically controlled. The shaft bearings and belt drive ensure silent running.
3- Control knob
2- ON/OFF switch

2. Assembly and installation

Check the integrity of the unit after unpacking. The box includes:

Overhead stirrer

Instruction manual

2.1 Electrical connection

After unpacking the instrument, place the unit on the laboratory bench. Before connecting the instrument to the power
supply, make sure that the values on the rating plate correspond to those of the power supply.
Ensure that the socket and the relative cut-off device conform to current safety norms and are easy to reach.

2.2 Start-up

Assemble the shaft using the Allen head screw. Fasten the instrument securely to the support rod (A00001300) with the
double clamp (A00001301). Secure the receptacle using the ribbon clamp (A00001302) to avoid damage.

2.3 Information about construction materials

Housing Die casting Polymer

3. Operating controls

Turn the unit on using the mains switch. Turn the potentiometer knob to be select the stirring speed.
Stirring speeds are indicated on the analogue scale around the knob.
NOTE: The speed setting is saved when the instrument is turned off or if there is a power failure.
When the instrument is turned on again, stirring starts at the previously set speed.

3.1 Overload protection

The current and voltage are electronically limited in order to safeguard the motor and the electronic parts against electric
surges.
In the event of abnormal conditions arising the unit shuts down automatically.
Over Load Current surges
The stirrer can compensate for eventual current surges for a limited period of time.
If the situation persists, the speed of the motor is gradually reduced, when a speed of 0 is reached the unit shuts down.
Over Curr Rpm error
This error occurs if the chuck is accidentally blocked or if the number of revs exceeds the max. permitted value.
Over Temp Temperature error
This error occurs if the unit is used for heavy-duty work for prolonged periods of time and at an ambient temperature that
exceeds the max. permitted temperature.
Before resetting the instrument allow it to cool down.
Over Volt Voltage surge
The software limits the power supply of the motor to the nominal value of the motor itself (60V).
A high speed setting or a heavy load on the chuck may prompt a higher voltage. In this case the voltage is limited to the
nominal value of the motor (60 Volt) and the number of revs is reduced accordingly.
If for any reason the power supply of the motor exceeds the maximum threshold value of 70V, "OVERLOAD" the unit will
shut down.
NOTE: To reset the unit remove the load from the chuck and turn the unit off and on again using the mains switch.

Allen key

Allen head screw
Structure Aluminum
5
1- Chuck
Fig. 1

Shaft

Power suppy cable
Control panel PET
EN