Varian 969-9840, Instruction Manual

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SECTION I - DESCRIPTION
87-900-865-01 ( B ) 2
1-1 General
The Turbo-V60 Leak Detector PCB controller is a
microprocessor-controlled, solid-state, frequency
converter with self-diagnostic and protection features.
The controller drives (within ten steps) the Turbo V-60
pump during the starting phase by controlling the
voltage and current respect to the speed reached by
the pump.
It incorporates all the facilities required for the
automatic operation of the Turbo-V60 pump series.
Remote start/stop and output control capability are
provided via auxiliary connectors.
1-2 Turbo-V60 controller description
The controller is a solid-state frequency converter
which is driven by a single chip microcomputer. The
package composition is:
−
Power transformer with interconnection cables
−
PCB including: power supply and 3-phase output,
analog and input/output section, microprocessor
and digital section
−
Controller to pump interconnection cable.
The power supply and the 3-phase output converts the
single phase (50-60 Hz) AC mains supply into a 3-
phase, low voltage, medium frequency output which is
required to power the Turbo-V pump.
The microcomputer generates the variable output
frequency and controls the 3-phase output voltage
according to the software and the gas load condition of
the pump.
Moreover, it manages input and output signals for a
fully automatic operation.
A dedicated non-volatile RAM is used to store pump
operating parameters and the input/output programmed
information upon failure for a period of 10 years
accumulated off time.
Two adjustable trimmers are provided to set the pump
rotational speed as follows:
−
P1 – High speed trimmer: 50 to 70 KRPM
−
P2 – Low speed trimmer: 30 to 50 KRPM
The controller can be operated via remote signals
through input/output connector.