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Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999162 // 19/01/2011
Setpoints
Valves (see accessories) can be used after appropriate configuration to set setpoints to open or close
a valve.
The digital I/O interface can be used as interface for existing (provided by the customer) isolation, cool-
ant or venting valves or a VACUUBRAND VMS module, if these components are not equipped with a
VACUU•BUS
TM
connection. The component has to be connected to the output of the module (an addi-
tional voltage supply is necessary).
Each valve / digital I/O interface can be used to set a setpoint “On” and a setpoint “Off”. The setting
range depends on the measuring range of the pressure transducer.
Set points with designation „1“ (e. g. „On 1“) always relate to pressure transducers (VSK 3000, VSP
3000, MPT 100) with address „1“ and valves or digital I/O interfaces with address „1“ (analogously for
addresses „2“, „3“, „4“).
Example:
If a setpoint „On 1“ is set to 500 mbar and a pressure less than or exactly 500 mbar is measured by the
corresponding pressure transducer 1 then a connected valve „1“ opens. If the pressure exceeds 500
mbar the valve closes.
If the setpoint „Off 1“ is set to 70 mbar the valve closes at a pressure less than or exactly 70 mbar, the
valve opens if the pressure exceeds 70 mbar.
A setpoint can be used e. g. to open a valve assembled between a backing pump and a turbomolecular
or diffusion pump first if a specified backing pressure is reached.
Configuring the valves or digital I/O interfaces to set setpoints
Reconfiguring the VACUU•BUS address of valves or digital I/O interfaces
1. Switch the vacuum gauge DCP 3000 off.
2. Preferably connect only the pressure transducer to be reconfigured to the DCP 3000.
3. Keep key ”VENT” pressed and switch the DCP 3000 on (key ”ON/OFF”).
4. Select the menu item ”Vacuubus” by turning and pressing the selection knob.
5. The first component detected by the VACUU•BUS is displayed (e.g., SP 1). If necessary, select the
pressure transducer to be reconfigured by turning and pressing the selection knob.
6. Keep key ”VENT” pressed and press selection knob additionally. The inverse display of the compo-
nent is replaced by a frame.
7. Turn the selection knob until the address, to which you want to reconfigure the pressure transducer
(e.g., SP 2 or SP 1), is displayed.
8. Press the selection knob. If the configuration was successful, the menu is quit and the DCP 3000
restarts.
A configuration of more than one pressure transducer to the same VACUU•BUS address will result in
error conditions at the DCP 3000 and must therefore be avoided!
Further information concerning the configuration of other components on demand.
