Chemglass CG-1995-V-20 - Manual (Page 2)

2
°C
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.
WARNING: when the Thermoregulator is connected to an instrument other AREX, 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
Fig. 1
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) and/or the temperature is out-of-range.
2. Assembly and installation
Check the integrity of the unit after unpacking. The box includes:
• Thermoregulator, with power cable
• Pt100 temperature probe
• Instruction manual
2.1 Connecting the Pt100 probe
Connect the probe to the Thermoregulator as shown on Fig. 2.
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 heating 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 stirrer such as AREX and AREC.X. The socket must supply a tension of between 9 and 16V DC. The
integrated installation system allows the instrument to be installed on support rods with a diameter between 10 and 13 mm.
2.4 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,
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).
3. Operating controls
Install the thermoregulator on the support rod and place the probe in the liquid to be
processed. To power the VTF plug the spiral cable into the dedicated socket on the heating
magnetic stirrer and turn the stirrer on. The display shows the software version after which it
Fig. 4
flashes for approximately five seconds showing the last temperature Set Point used (Fig. 4).
The current Pt100 probe temperature reading is then displayed on the main window.
Thermoregulation starts automatically based on the last temperature Set Point used (Fig. 5). Fig. 5
NOTE: the magnetic stirrer always exercises primary control of the heating plate temperature. To control the heating plate
temperature using the VTF thermoregulator, set the magnetic stirrer temperature to maximum. The magnetic stirrer
temperature control can also be used as a safety thermostat since the heating plate will not exceed the temperature set on
the stirrer. In this case, longer heating time will be necessary in order for the sample to reach the VTF set point temperature.
3.1 Setting the working temperature
From the main window, press
“SET”. The set-up window is displayed (Fig. 4).
Set Point Temperature From -10 to +300 °C Default value: 40 °C
With the display is flashing use “↑” and “↓” to select the temperature required. The temperature setting is saved when no
keys are touched for approx. 5 seconds (Fig. 5).
1 Display 2 Set
3 Down arrow 4 Up arrow
5 Measurement unit 6 Timer display on
7 Temp. probe
8 Green “ON” led
9 Clamps 10 Plug
11 Sliding clamp
°C
D i g i t a l T h e r m o r e g u l a t o r V T F
FUZZY LOGIC
S e t
- 1 0 . . . + 3 0 0 °C
Fig. 2 Fig. 3