Druck DPI 530, User Manual

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DPI 530 User Manual 1
K162 Issue No.2
1 Introduction
The DPI 530 instrument is a fast response, closed loop, pneumatic
pressure controller. It is contained in a Euro sub-rack module that can be
mounted in a 3U high sub-rack. A push switch on the front panel enables
the instrument to operate in either the pressure measure mode or pressure
control mode.
Pressure is sensed by a transducer containing a silicon strain gauge
diaphragm with electronic thermal compensation and linearization. One of
five units of pressure measurement or percentage of full-scale can be
selected by switches on the rear panel of the instrument. A seven segment
LCD display shows, in the measure mode, the pressure value and, in the
control mode, the set-point value.
In the pressure control mode the set-point can be set by a centrally-
located, ten-turn potentiometer or by six independent preset span divider
keys. The preset value of each span divider is adjusted by individual
potentiometers. Each span divider has full control from the lowest
calibrated pressure to the span value. The controller uses pulse width
modulation to operate solenoid valves in an analogue control loop.
Remote control can be selected by switches on the rear panel. The
instrument can be remotely controlled by an analogue input signal of either
0 to 10 V d.c. or 0 to 20 mA d.c.
A pressure outlet port connection is located on both the front and rear
panels; all other connections are on the rear panel.