MRP-2000 Differential Pressure Controller with 3-point control output - Micatrone AB - #1

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MRP-2000 Dok.nr: Mi-247gb / 2010-05-25 APPLICATION MRP-2000 is a differential pressure controller with two set points intended for controlling positive, negative 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 developed by Micatrone to manage rapid changes without self-oscillation and overshoot.  Neutral zone around the set point value: the controller is passive (no output signal).  Pulse zones on each side outside of the neutral zone: the controller gives short pulses.  Pulse length: time length of the pulse.  Pulse separation time: time between pulses. Through pulsing the actuator in the pulse zone (outside 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 instances. LEDs indicate which set point value is connected. If there is no phase on terminal 3 then set point value 1 is connected. If there is a phase on terminal 3 then set point value 2 is connected. The LEDs “increase” and “decrease” show the control output signal.  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 replacement 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 4 mm. The location of the holes is shown back of the enclosure. 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 after 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 measurement 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 compared to atmospheric pressure, the pressure connection should be made on the + socket (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 - socket (left-hand). The higher pressure should be connected to the + socket. © AB MICATRONE 2010-05-25 [H:\ Apps \ Typeset \ Mima \ Mi-247gb_100525.vp] Differential Pressure Controller with 3-point control output catrone® Operating and Installation guide PGM ESC Prog, mode Set point 1 Set point 2 Increase Decrease 0228 Pa Zero Hand