Arthur Grillo 2559 Manuel - Page 2
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Safety instructions
Attention! Read this instruction carefully, before you insert connect this
item. Only qualified personal who is familar with installation, construction and operating
!
of the equipment should work around these sensors.
Application
The differential pressure controller DPC200 measures low pressure of non-aggressive gases, particulary
of air.
The customer can use an analog signal (0...10V). The device offers two different settings. On the one hand
the output signal stands for a pressure proportional signal during measuring mode or volume flow square
root signal.
And on the other hand the output signal stands for a PI control signal for differential pressure during
controlling mode or volume flow during controlling mode.
This device is mainly for e.g. in air conditioning systems for fan controlling, for pressure control of rooms or
filter controlling.
Description
The to be measured differential pressure affects to both sides of a silicone diaphragm, which is displaced
against a measuring spring. The displacing of the diaphragm is converted into an electrical output signal
by a differential transformer with suitable electronics.
The DPC200 combines two functions:
Measuring mode:
The differential pressure is shown on the LCD display, and it is
given as a proportional 0...10V output signal.
Or the calculated volume flow is shown on the LCD display, and
it is given as a square root 0...10V output signal
Controlling mode:
In the device software two setpoints can be entered.
The user can switch between the setpoint via potential free contact input.
The function of the device is to reach and maintain the setpoint.
To accomplish this, the measured sensor value is compared
with the activated setpoint, and the output signal is calculated
from the difference.
The PI controlling output signal is given as a 0...10V signal e.g.
for activating directly a fan.
Additional adjustments are:
Maximum output voltage to limit the PI controlling signal.
P- and I- parameter to adjust the control.
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