Vermes MDS 358X user Manual.pdf - 第89页

Operation 78 VTK - TR -BA- 072e - 1 - User Manua l MDS 358X S eries You do not n eed the addit ional USB f lash dr ive com ing with the c alibrat or , if y ou work w ith an MDC 3500. T he USB flash dri ve is only for ot …

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Operation
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7.13.1 Heater and MDC
You can activate the heater via the heater submenu in the MDC menu (see picture below). Use
the [enter] and arrow keys to navigate down to the submenu “Heater” in the menu
“Cooler/Heater”. Here you can switch ON the heater (menu item “Heater ON/OFF”) and set the
temperature (menu item “Heater Temp.”). The possible temperature range depends on the
connected heater (e.g. for MDH-48-BY it lies between 10 °C and 180 °C). (Further information
about the menu of the control unit you can find in paragraph 4.5, page 27.)
Fig. 57: Submenu Heater
INFORMATION
Control heater via serial commands
The heater can also be controlled via the serial interface. The relevant commands and
information can be found in paragraph 8.1.2.2, page 88.
7.13.2 Calibration of the Heater
You should calibrate the temperature settings of your heater in regular intervals. We recommend
to do the calibration once a year. VERMES Microdispensing offers a calibrator set (Calibrator set
for MFC 3000, order no. 1015434, see Fig. 58). The set contains two calibrators for different
temperatures:
Calibrator MFC3000 – 20°C (blue, as single product order no. 1015437)
Calibrator MFC3000 – 200°C (red, as single product order no. 1015436)
Fig. 58: Calibrator Set
Operation
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VTK-TR-BA-072e-1 - User Manual MDS 358X Series
You do not need the additional USB flash drive coming with the calibrator, if you work with an
MDC 3500. The USB flash drive is only for other devices.
You have to calibrate your heater twice, once at 200 °C and once at 20 °C. You always have to
calibrate at both temperatures, since the old values are deleted the moment you start a new
calibration. It does not matter, in which order you perform the calibrations, as long as you use
each calibrator exactly once.
The following table shows you how to perform the calibration.
Picture Explanation
Preparation
The MDC is connected with a microdispensing valve, but not with a
heater. Start up the MDC. The starting menu appears in the display.
+
or
+
Step 1 (First Calibrator gets connected)
Connect the calibrator MFC3000 – 200°C.
Important Note!
Make sure to screw the calibrator tight enough.
There are now two possibilities.
If the MDC had been calibrated before, the message “Heater
connected” appears in the display. The display then switches
between this message and the message “Press enter”.
If the MDC had not been calibrated before, or if there was an error
during the last calibration attempt, the message “Heater not
calibrated” appears. Similar to the case above, the display switches
between this message and the message “Press enter”.
Press the [Enter]-key.
Step 2 (First calibration is running)
After several seconds, in the display appears the message
“Calibration … Heater 200°C”.
Wait until the display jumps back to the starting message.
Step 3 (First calibrator screwed off)
Screw off the calibrator. In the display, you get the message “Heater
is disconnected”.
+
Step 4 (Second Calibrator gets connected)
Connect the calibrator MFC3000 – 20°C.
Important Note!
Make sure to screw the calibrator tight enough.
Operation
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In the display, the message “Heater not calibrated” appears. The
display then switches between this message and the message “Press
enter”.
Press the [Enter]-key.
then
Step 5 (Second calibration is running)
After several seconds, in the display appears the message
“Calibration … Heater 20°C”.
Wait until a new message appears: Heater is calibrated. The
calibration has been completed.
Step 6 (Calibration completed, second calibrator screwed off)
The calibration has been completed successfully. Screw off the
calibrator. In the display, you get the message “Heater is
disconnected”.
Error during calibration
In case an error happens during the calibration, in the display
appears the message “Error Calibration” for approx. 2 s.
There can be different causes for an error, e.g.
• calibration stopped too early
• communication was interrupted
• calibrator not correctly connected
• you used the same calibrator twice
• defect at the MDC
Once you have solved the problem, you have to repeat the
complete calibration, starting at step 1.
Information!
In case of an error during the calibration, the values are set
back to the default values. You will be able to work with these
values, but the results will not be as precise as with a correctly
calibrated heater.
Tab. 26: Calibration of the heater
Once the full calibration is completed, you can proceed with the normal work at your application.