Velp Scientifica VTF EVO Manuel D'instructions page 6

1. Introduction
The Thermoregulator is ideal for many applications and meets the most demanding
requirements in terms of precision, reliability and flexibility of use thanks to the application of
Fuzzy Logic technology. The Fuzzy Logic electronic automatically adapts thermoregulation
to the varying factors such as power, load and thermal dispersion specific to each
application, optimizing both overheating and oscillations around the temperature set-point.
The accuracy and precision of thermoregulation at each end the scale and whatever the
volume being processed, is a fundamental characteristic of the Vertex.
With the VTF EVO version, it is possible set different cycles of temperatures and record the
real values, using the wireless technology in combination with A00000244 TEMPSoft™ with
Wireless DataBox™.
WARNING: when the Thermoregulator is connected to another instrument than the VELP
Scientifica AREX, AREX DIGITAL PRO, AREC.X or PW10, please check the compatibility of
the DIN 5 pole connector as illustrated in wiring diagram in this manual.
NOTE: the most precise results are obtained measuring aqueous solutions temperature.
The microprocessor offers various other functions:
• a working time of up to 24 hours and 59 minutes can be set with automatic switch off;
• the maximum sample temperatures reached during the test can be recorded.
The structure is made of a non-scratch technopolymer resistant to chemical agents and
offers a high level of IP54.
The instrument has an in-built safety and control circuit which is constantly
active and shuts-down the thermoregulator immediately in the following
situations: the temperature probe is not connected; the temperature probe is
faulty (cut-off or short-circuited), the temperature is out-of-range and/or the
probe is not inserted inside the sample.
2. Assembly and installation
Check the integrity of the unit after unpacking. The box includes:
•
Thermoregulator, with power cable for connection to VELP Scientifica
AREX, AREX DIGITAL PRO, AREC.X and PW10
2.1 Connecting the Pt100 probe
Connect the probe to the Thermoregulator as shown on Fig. 2.
NOTE: the mains cable must remain far away from the hot plate.
2.2 Installing the VTF
The VTF has an innovative integrated system to simplify
installation on the support rod and facilitate the positioning of the
Pt100 probe in the most commonly used containers.
The two clamps allow height-regulation whilst a sliding
clamp allows horizontal regulation (Fig. 3).
2.3 Using the VTF with magnetic stirrers
The power cable is suitable for connection to the most common heating magnetic stirrers with a dedicated socket for the
remote control of the heating plate such as the VELP Scientifica models AREX, AREX DIGITAL PRO and AREC.X. The
socket must supply a tension of between 9 and 15V DC. The integrated installation system allows the instrument to be
installed on support rods with a diameter of between 10 and 13 mm.
2.4 Using the VTF EVO in wireless mode.
For more information about the wireless function of VTF EVO, please check the operation manual of A00000244
TEMPSoft™ with Wireless DataBox™.
2.5 Other applications
When using the thermoregulator for other applications bear in mind that the transistor output can take a maximum current of
50mA. Where power loads of up to 2200W are required the use of an external power relay is necessary (code A00000001,
VELP PW10). For the thermoregulation of liquids that are not compatible with the construction material of the probe
(stainless steel AISI 316), the use of a glass-coated probe is recommended (code A00000003). When it is necessary to
thermoregulate a liquid that is not in close proximity to the VTF, a 1m probe extension cable is available (code A00000002).
1 Display
3 Minus
5 Measurement unit
7 Temp. probe
9 Clamps
11 Sliding clamp
Fig. 2
6
EN
Fig. 1
2 Set
4 Plus
6 Timer display on
8 Green "ON" led
10 Plug
•
Pt100 temperature probe
•
Instruction manual
Fig. 3