Introduction; Installation; Operation - Velp Scientifica Arec 4 Manuel D'instructions

1. Introduction

The AREC 4 / AREC 7 heating magnetic stirrer with a ceramic plate is designed for general laboratory use and for
applications requiring precise control of the stirring speed and heating plate temperature.
The ceramic heating plate means that higher temperatures can be obtained compared to the traditional aluminium heating
plate and it takes less time to heat the sample. Ceramic is an inert and tough material resistant to almost any chemical or
mechanical aggression; its surface characteristics remain unaltered over time.
The AREC 4 / AREC 7 is used to stir liquids using a magnetically driven stir bar placed inside the vessel. The powerful
brushless motor can stir from 100 to 1500 rpm.
SpeedServo TM technology maintains constant speed as viscosity changes.
Note: it's important to choose the most suitable magnetic stirring bar related to the type and the quantity of the liquid to be
stirred as well as to the type of the beaker. Size and shape of the magnetic stir bar determines the stirring efficiency at a ny
given speed. The stirring bar which satisfies most applications is code A00000356 (8 x 40 mm).

2. Installation

•
Unpacking
➢ Check the integrity of the unit after unpacking
•
The box includes
➢ AREC 4 / AREC 7 heating magnetic stirrer
➢ Instruction manual
➢ Power cable
➢ Magnetic stir bar Ø 8 x 40 mm (A00000356)
•
Installation
➢ Place the unit on a non-flammable surface
➢ Make sure that the technical specification of the unit and of the power supply line are the same
➢ Make sure that the electrical network is grounded
➢ Make sure that the main switch is on position "0" (OFF)
➢ Connect the instrument to an easily accessible socket (compliant with the current safety norms), using only the
provided power cable
Note: keep the power cable far away from the hot plate.
➢ Place the container with the liquid and the stir bar on the stirring plate

3. Operation

Power-up
•
Turn the unit on using the main switch
•
The right led between the two knobs lights up
Stirring
•
Rotate the right knob to set the stirring speed, the led over the speed knob lights up
•
The real speed increases until setpoint achievement
•
A microprocessor ensures constant speed even if the viscosity changes (SpeedServo
•
Turn the knob to the 0 positions to stop stirring
Heating
•
Rotate the left knob to set the heating plate temperature
•
If the set temperature is higher than the actual one, the led over the temperature knob lights up
•
When the heating plate temperature exceeds 50 °C, the left led between the two knobs lights up until the
temperature drops below 50 °C
Note: This warning is active even if the main switch is off but not if the instrument is not powered.
•
Turn the knob to the 0 positions to stop heating
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EN
TM
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