Setpoints, Interfaces (see section “setpoints”, pg. 41) – VACUUBRAND DCP 3000 User Manual
Page 41
Setpoints
Valves (see “Accessories”, pg. 51) can, after appropriate configuration,
be opened or closed at preset ”On” and ”Off” setpoints. Thus the switch-
ing of the valves is controlled by the measured system pressure.
The digital I/O interface can be used as interface for existing (provided
by the customer) isolation, coolant, or venting valves, in case these com-
ponents are not equipped with a VACUU•BUS
TM
connection. The com-
ponent has to be connected to the output of the module; an additional
voltage supply is required.
Requirements for working with setpoints:
To switch a valve or an I/O interface connected to the DCP 3000 pres-
sure-dependently, the following requirements must be met:
- at least one external pressure transducer VSK 3000, VSP 3000 or
MPT 100 is connected to the DCP 3000 vacuum gauge (VACUU•BUS
address ”VSK x”, ” VSP x” or ”MPT x”).
- a valve or a digital I/O interface is connected to the DCP 3000 and con-
figured to the according VACUU•BUS address ”SP x” to be operated
by setpoints (see below on how to configure components for working
with setpoints).
- an ”On” setpoint ”On x” or an ”Off” setpoint ”Off x” for switching the
valve/interface is preset.
- all required components and setpoints have to be configured to
corre-
sponding VACUU•BUS addresses (e.g., pressure transducer ”VSK
1”, valve ”SP 1”, ”On” setpoint ”On 1”, ”Off” setpoint ”Off 1”). The same
applies to VACUU•BUS addresses ”... 2”, ”... 3” and ”... 4”.
Setting setpoints:
Go to the configuration menu and select the submenu ”Setpoint”. You
may preset four pressure values as ”On” setpoints (”On 1”, ..., ”On 4”)
and four ”Off” setpoints (”Off 1”, ..., ”Off 4”).
Thus, for each valve or I/O interface one ”On” setpoint and one ”Off” set-
point can be set. The setting range depends on the measuring range of
the pressure transducer connected to the DCP 3000.
Example:
If the ”On” setpoint ”On 1” is set to 500 Torr and a pressure less than or
equal to 500 Torr is measured by the corresponding pressure transducer