INSTRUCTIONS FOR USE
23
87-900-080-01 (D)
USE PROCEDURE
Operating Modes
The MidiVac controller can be set to operate in front
panel mode (“Local” mode), or by host computer
(“Remote” mode).
If no optional serial card is installed in the controller,
the “Remote” mode is unavailable.
If the serial card is installed, the “Local” mode can be
forced by pressing the “Menu” push-button on the front
panel: the “REMOTE” LED will blink.
If the HV is on and the temporary “Local” mode is
activated, all the operations in the normal “Local” mode
can be executed (see the following table regarding
controls and indicators). “Remote” mode can be
restored by pressing the “Menu” push-button. The
“REMOTE” LED should indicate normal operation.
When the HV is OFF and the temporary “Local” mode
is activated, only the setting operations can be
accessed. At the end of the settings menu, the unit will
default to true “Local” mode. To restore the “Remote”
mode, switch the HV on and press the “Menu” push-
button.
If the controller is set to “Remote” mode and the HV is
on, the high voltage signal will depend on the last
command (on or off) from the host computer. The initial
condition from the factory is an off signal. To turn ON
the HV it is necessary to switch to “Local” mode by
pressing the “Menu” push-button and engaging the HV
or to send the appropriate signal from the host
computer.
If the controller is set to “Remote” mode and the HV is
off, the high voltage signal can only be switched on by
an appropriate serial command from the host
computer.
The MidiVac controller can operate in “Start” or
“Protect” modes.
In the “Start” mode, when the high voltage is switched
on, the controller feeds the pump with the required
current until a fault condition is detected.
In the “Protect” mode two different conditions are
possible:
1. When the High Voltage is switched on the current
value exceeds the set trip current: while the
controller feeds the pump with the required current
until its value falls under the set threshold value, at
this time the controller operates with a “real
Protect” mode and it switches off the High Voltage
when the current exceeds its set threshold value
and displays the “Err2” message.
2. When the controller is switched on the current
value is less than the threshold value: in this case,
after a settling time of about 30 seconds when the
current is not controlled, the controller switches off
when the current value exceeds the set threshold
value and displays the “Err2” message.
Switching On and Off
To switch on the controller, it is necessary set to I
position the mains switch of the rear panel (see the
above figure).
To switch on the high voltage it is necessary to set to
ON position the front panel switch (12).
When the high voltage is switched on, the front panel
LEDs (10) show the preset maximum voltage value.
To show on the display the output voltage you must
push the front panel pushbutton (3); to show the current
you must press the (4) pushbutton.
NOTE
The output voltage value can change according to the
current: see the paragraph “MidiVac controller
description” of appendix “Technical information”.
To
switch off the high voltage set to OFF position the
front panel switch (12). To switch off the controller set
to 0 position the mains switch of the rear panel.
MAINTENANCE
The MidiVac controller does not require any
maintenance. Any work performed on the controller
must be carried out by authorized personnel. When a
fault has occurred it is possible to use the Varian repair
service. Replacement controllers are available on an
advance exchange basis through Varian.
!
To avoid injury to personnel and damage to the
equipment, if the controller is laying on a table make
sure it is steady.
Before carrying out any work on the controller,
disconnect it from the supply. If a controller is to be
disposed, do so in accordance with the specific
national standards.
DISPOSAL
Meaning of the "WEEE" logo found in labels
The following symbol is applied in accordance with the
EC WEEE (Waste Electrical and Electronic Equipment)
Directive.
This symbol (
valid only in countries of the European
Community
) indicates that the product it applies to
must NOT be disposed of together with ordinary
domestic or industrial waste but must be sent to a
differentiated waste collection system.
The end user is therefore invited to contact the supplier
of the device, whether the Parent Company or a
retailer, to initiate the collection and disposal process
after checking the contractual terms and conditions of
sale.
WARNING!
