Micatrone MRP-2000 Operating And Installation Manual

catrone
Differential Pressure Controller
with 3-point control output
Prog, mode
Set point 1
Set point 2
Increase
Decrease

APPLICATION

MRP-2000 is a differential pressure controller with
two set points intended for controlling positive, neg-
ative or differential pressure on air and gases in
combustion plants and air treatment systems.
MRP-2000 has a 3-point control output: increase
signal, no signal or decrease signal.

FUNCTION

MRP-2000 features special control parameters de-
veloped by Micatrone to manage rapid changes
without self-oscillation and overshoot.
q Neutral zone around the set point value:
the controller is passive (no output signal).
q Pulse zones on each side outside of the neutral
zone: the controller gives short pulses.
q Pulse length: time length of the pulse.
q Pulse separation time: time between pulses.
Through pulsing the actuator in the pulse zone (out-
side the neutral zone) the control sequence slows
down to eliminate the risk of self-oscillation around
the set point value.
Both the pulse length and the pulse separation time
are adjustable to match different operating in-
stances. LEDs indicate which set point value is con-
nected. If there is no phase on terminal 3 then set
point value 1 is connected. If there is a phase on ter-
minal 3 then set point value 2 is connected. The
LEDs "increase" and "decrease" show the control
output signal.
q Outside the pulse zone the controller provides
an continuous output signal.

DESIGN

MRP-2000 is designed with three interconnected
circuit boards, I/O board, measurement board and
the display board. 4-digit indicator with character for
negative values and 6 LEDs for status indication.
Readable and programmable from the outside.
ABS plastic case equipped with four threaded holes
for cable glands. Two pressure outlets for HT-plastic
tube 8/6 which can easily be removed for replace-
®
0228
Pa
PGM ESC
Zero Hand
Operating and Installation guide
Dok.nr: Mi-247gb / 2006-02-09
ment with other couplings with male R1/8" thread.
Use a counter hold on the coupling closest to the
case when assembling and dismantling the tubes or
fittings.

INSTALLATION

MRP-2000 is mounted via 4 screws, max Æ4 mm.
The location of the holes is shown back of the enclo-
sure. Do not place the unit on a warm surface.
Connect power supply according to the electrical
connection. Check that the controller is marked with
the correct power supply voltage. If using cable
glands without a nut on the inside, glands with
grommet must be used to avoid damage to the
threads on the enclosure. Remember to remove the
transparent protective cover from the front panel af-
ter finished installation.

PRESSURE CONNECTION

The pressure connection should be made with
Micatrone's pulse line sets to ensure a tight and
safe function.
MRP-2000 is available with three different mea-
surement ranges which run through zero:
-300...+300 Pa, -3...+3 kPa and -7.5...+7.5 kPa.
The metering socket is connected via the HT-plastic
hose 8/6 like this:
1. If MRP-2000 shall control a pressure that is com-
pared to atmospheric pressure, the pressure con-
nection should be made on the
(right-hand). This applies whether the pressure is
positive or negative compared with the atmosphere.
-
The socket should remain open.
2. If MRP-2000 shall control a differential pressure,
the lowest pressure compared with the atmospheric
pressure is connected to the
The higher pressure should be connected to the
socket.
MRP-2000
+
socket
-
socket (left-hand).
+