Arthur Grillo DPC200-AC Manuel d'installation et d'utilisation - Page 5
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2.
Product description
The differential pressure controller DPC200-AC measures low pressure of inert gases,
particularly of air.
2.1 Type plate
1.
Product name
2.
Supply voltage
3.
Signal output
4.
Measuring range
5.
Serial no.
6.
Manufacturer
2.2 Intended use
This device is primarily intended for use with air conditioning systems, room pressure
control or filter control with continuously variable speed fans. It can be operated solely as
a sensor (measuring mode) or closed loop controller for pressure / volumetric flow rate
control. As analog output the operator can use a signal from 0 ...10 V DC. Depending on
the settings the signal has different meanings:
1.
If the device is used as a pressure sensor, the output signal is proportional to the
measured pressure.
2.
As a volume flow sensor the device outputs a square root signal.
3.
With closed loop pressure or volume flow the output signal stands for the control
variable of the PI-control.
2.3 Functional description
A soft silicone diaphragm is used as sensor. Under the influence of the differential pressure
the diaphragm displaces a measuring spring until the spring force compensates for the
pressure pushing on the diaphragm. A contactless differential transformer and suitable
electronics convert this displacement into a continuously variable output voltage signal.
The DPC200-AC provides two function options:
1.
On the one hand it is used as a measuring device. In the measuring mode the differential
pressure is shown on the display, and a proportional 0...10V DC output signal is provided.
2.
Besides the measuring mode the DPC200-AC also can be operated in a control mode.
Two setpoints can be adjusted in the device and can be selected with the potential
free contact input. The PI-Algorithm matches the measured differential pressure with
the setpoint and operates the control variable so that a constant pressure results. The
control variable is given as a 0...10 V DC output signal.
Instead of the quantity 'differential pressure' also the quantity 'volume flow' can be used
for measuring and for control.
Doc.-no.: DPC200-AC_01_EN
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Issue: 07/2019
differen gases
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