Using The Thermoregulator Vtf; Using The External Probe; Setting Mode - Velp Scientifica AREX DIGITAL PRO Manual De Instrucciones

When heating is turned Off (Heating knob OFF) and the heating plate temperature exceeds 50 °C, the message "Hot"
flashes on the display until the temperature of the heating plate falls to below 50 °C (or until the instrument is turned off
using the ON/OFF switch).
NOTE: this warning is not active if the instrument is not powered.

3.2 Using the thermoregulator VTF

Screw the threaded support rod into its seat on the back of the instrument and fasten
the VTF thermoregulator onto the support rod. Place the temperature probe in the flask
making sure that it is completely immerged in the sample. Connect the two instruments
(AREX Digital PRO and VTF) by plugging the VTF into the dedicated socket on the
back of the AREX Digital PRO.
Select the operating temperature required on the VTF thermoregulator.
Turn the temperature control knob on the front panel of the AREX Digital PRO to the
desired temperature.
NOTE: when the two instruments are connected, the display of the AREX DIGITAL
PRO does not show the temperature but a dashed line (---). The operating temperature
is shown on the display of the VTF thermoregulator.
The AREX DIGITAL PRO always has primary control of the heating plate temperature.
When using the VTF thermoregulator always select the max temperature on the AREX
Digital PRO. The temperature control function of the heating plate can also be used as
a safety thermostat. In this case the maximum temperature of the heating plate will not
exceed the temperature setting on the AREX Digital PRO meaning that a longer
heating time is required in order to reach the VTF thermoregulator temperature setting.
(chap. 3.4)

3.3 Using the external probe

Screw the threaded support rod (optional accessory, code A00001069) into its seat on
the back of the instrument and fasten the clamp (optional accessory , code
A00000004) onto the support rod. Fit the temperature probe A00000268 into the clamp
making sure that it is completely immerged in the sample.
Plug the temperature probe A00000268 into the dedicated socket on the back of the
AREX Digital PRO with the instrument off. A led on the left-hand side of the display
indicates that the probe is connected, the display indicates the probe temperature
reading. Select the operating temperature using the heating knob on the AREX Digital
PRO. A led at the center of the display indicates that the set-point temperature is
shown; after 5 seconds the led goes out and the display indicates the probe
temperature.

3.4 Setting mode

Turn the left knob twice from the minimum to the maximum during the visualization of the software version in order to enter
into the setting mode.
Once there, by turning the left knob, it is possible to pass from one of the following parameter to the next ones:
Parameter shown
CAL P100
CAL tA
FS tCJ
OPt tYpE
OPt P100
ALL P100
Turn the right knob from the minimum to the maximum and then back to the minimum in order to pass to the parameter you
want to modify. The display will show the value saved for 3 seconds, and then the new value according to the position of the
right knob.
The new value is automatically saved after 4 seconds, if during this time the right knob is not moved (no change of value).
"dOnE" is shown and then the system goes back to the main menu.
Once the new values are set, switch off and restart the instrument.
(*) When A is selected: in case of black-out, once the power is back the device will remain off
When b is selected: in case of black-out, once the power is back the device will automatically restart with the latest
settings
(**) Select FInE to minimize overshoot and fluctuations of temperature.
Select FASt to save time.
(***) When POn is selected: if the instrument don't measure an increase of temperature, a signal of alarm is shown.
Default value Range
0,0°C -10,0 ÷ +10,0°C
0,0°C -10,0 ÷ +10,0°C
370°C 0 ÷ 370°C
A – b
A
FASt FInE - FASt
POn POn-POFF
Description
External probe calibration
Probe calibration at 20°C
Maximum temperature settable
(*) Restarting mode
(**) Type of control with external probe
(***)External probe safety
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