Using The Thermoregulator Vtf; Using The External Probe; Setting Mode; Error Messages - Velp Scientifica ARECX Serie Manuel D'instructions

3.2 Using the thermoregulator VTF

Screw the threaded support rod (optional accessory, A000 01069) into its seat on the back of
the instrument and fasten the VTF thermoregulator onto the support rod. Place the temperature
probe in the receptacle making sure that it is completely immerged in the sample. Connect the
two instruments (AREC.X and VTF) by plugging the VTF into the dedicated socket on the back
of the AREC.X.
Select the operating temperature required on the VTF thermoregulator.
Turn the temperature control knob on the front panel of the AREC.X to maximum.
The heating magnetic stirrer always has primary control of the heating plate temperature.
NOTE: when the two instruments are connected, the display of the AREC.X does not give
temperature readings but a dashed line (- - -). The operating temperature is shown on the
display of the VTF thermoregulator.
When using the VTF thermoregulator always select the max temperature on the AREC.X. 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 AREC.X meaning that a longer heating time is required in order to reach the VTF
thermoregulator temperature setting.

3.3 Using the external probe

Screw the threaded support rod (optional accessory) into its seat on the back of the instrument
and fasten the clamp 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 AREC.X
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 AREC.X. 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 P10
FS tCJ
OPt tyP
OPt P10
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).
"End" 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 FIn to minimize overshoot and fluctuations of temperature.
Select FAS to save time.
(***) When POn is selected: if the instrument don't measure an increase of temperature, a signal of alarm is shown.

3.5 Error messages

If an error message appears on the display, please contact VELP Scientifica's technical service department.
When the display shows an error message, the stirring and heating functions stop automatically.
NOTE: To remove the error message disconnect the instrument from the power supply.
AL1 Thermocouple is out of range
AL2 Excessive heating time
The stirring system doesn't run correctly
AL3
AL4 Plate temperature higher than 252 °C or the probe is disconnected with instrument ON
AL6 Probe not inserted inside the sample
Default value Range
0,0 -10,0 ÷ +10,0°C
550 0 ÷ 550°C
b
FAS FIn - FAS
POn POn-POFF
Description
External probe calibration
Maximum temperature settable
A – b
(*) Restarting mode
(**) Type of control with external probe
(***)External probe safety
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