Arthur Grillo DPC200-R Manual de instalação e operação - Página 5
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2.
Product description
The airflow / pressure controller DPC200-R measures low pressure of inert gases, par-
ticularly of air.
2.1 Type plate
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Product name
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Measuring range
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Supply voltage
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Signal output
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Serial no.
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Manufacturer
2.2 Intended use
This device is primarily intended for use with air conditioning systems, room pressure
control or filter control with ebm-papst continuously variable speed fans. It can be oper-
ated solely as a sensor (measuring mode) or closed loop controller for pressure / volu-
metric 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:
If the device is used as a pressure sensor, the output signal is proportional to the
1.
measured pressure.
As a volume flow sensor the device outputs a square root signal.
2.
With closed loop pressure or volume flow the output signal stands for the con-
3.
trol 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-R 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-R 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-R_02_EN
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Issue: 06/2018
PRODUCT DESCRIPTION
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