Vermes MDS 358X user Manual.pdf - 第41页

Control Unit MDC 30 VTK - TR -BA- 072e - 1 - User Manua l MDS 358X S eries 4.5.3 Submenu “Cooler/ Heater ” A Micr odisp ensing Sys tem MDS c an be equ ipp ed with a hea ter or a coolin g v alv e. For heatin g, you can us…

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VTK-TR-BA-072e-1 - User Manual MDS 358X Series
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Fig. 6: Display main menu
In the lower line, a maintenance bar is shown (position 5). If all eight sections are filled,
maintenance is recommended. Though be aware that this bar is only updated when starting the
MDC!
In “Tappet” and “Nozzle” you can see the current values as well as the respective reference value.
If a heater is used, instead of “Ready” the current temperature is displayed.
4.5.2 Submenu “Pulse Parameters”
In the submenu “Pulse Parameters” you can recall and modify dispensing parameters for a
particular process. The limits for these parameters you can find in the diagram. You cannot enter
values outside these ranges. The values for rising and falling are for 80 % needle lift. If the needle
lift is smaller, the values might be lower. The dispensing frequency based on the current
parameters is shown in the main menu in the display (position 2, see Fig. 6, page 29), but only, if
“Scenario” is “OFF”.
Fig. 7: Submenu „Pulse Parameters“
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VTK-TR-BA-072e-1 - User Manual MDS 358X Series
4.5.3 Submenu “Cooler/Heater”
A Microdispensing System MDS can be equipped with a heater or a cooling valve. For heating,
you can use a 48 V heater (e.g. Heater MDH-48-BY, order no. 1014231). For cooling, you can use a
flow control valve (e.g. Flow Control Valve FCV-AC 6.0 M12, order no. 1016265).
Fig. 8: Message “Heater connected - press enter”
CAUTION
Danger of burns through high temperatures!
The heater can reach temperatures of up to 180 °C.
• Do not touch this area during operation.
• And afterwards only touch it once it has cooled down.
By using a heater, the dynamical viscosity of the fluid to be dispensed can be controlled. For
some liquids, dispensing without heating is impossible. Heating may also be required to ensure a
constant process temperature, or when the dispensing has to take place above room
temperature.
To reach a certain target temperature takes time. This time is influenced by many different
circumstances, e.g. the outer temperatures.
Fig. 9: Submenu “Cooler/Heater”
All relevant functions of the heater and the cooling valve can be set in this submenu. With
“Cooler” you can reach the submenu for the cooling settings (see paragraph 4.5.3.2, page 31).
INFORMATION
MDC detects the heater and the cooler during start-up
During start-up, the MDC also checks if a heater and/or a flow control valve is connected. The
messages “Heater connected” (or “Heater is disconnected!”) and “Cooler connected” (or “Cooler
is disconnected!”) will be displayed. When a heater is connected, the display switches between
the message “Heater connected” and the message “press enter” (see Fig. 8). You need to press
the [enter]-key to confirm it.
Control Unit MDC
VTK-TR-BA-072e-1 - User Manual MDS 358X Series
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With “Heater” you can reach the submenu for the heater settings (see paragraph 4.5.3.1,
page 31).
4.5.3.1 Submenu Cooler
This submenu has three menu items.
CAUTION
A
void uncontrolled compressed air release
An uncontrolled release of compressed air can cause damages and injuries. Therefore, your
controlling machine needs to have a stopcock with air vent. Additionally, your XY-machine needs
to follow the directives for working with compressed air.
To reach a certain target temperature takes time. This time is influenced by many different
circumstances, e.g. the outer temperatures.
Fig. 10: Submenu “Cooler”
All relevant functions of the cooling system can be set in this submenu. With “Cooler Temp.”, you
can set the temperature with an accuracy of 1 °C. With “Cooler ON/OFF”, you can switch the
cooling valve ON or OFF. “Cooler Offset” allows you to set a cooler offset in percent (see
chapter 7.14.2, page 81). This cooler offset provides an offset value for the flow control valve,
which is independent from the regulation system. The value is given as a percentage value.
In case the cooler is turned ON, if the actuator temperature is more than 10 °C above the target
temperature, the systems starts a more effective cooling. During this fast cooling phase, the
green Cooling LED flashes. Once the actuator temperature falls within 10 °C above the target
temperature, the green Cooling LED no longer flashes, but is ON. For exact dispensing results, the
actuator temperature should stay below 80 °C. If the Error 502 appears (see paragraph 11.2,
page 142), dispensing is only again possible after the actuator temperature falls below 80 °C.
To check information about the cooler (e.g. status, temperatures) via RS-232C interface, send the
command “COOLER:?” (for details see paragraph 8.1.2.2, page 88).
4.5.3.2 Submenu Heater
This submenu has two menu items.