Sauter - Pneumatic controller RLP100 - TROX

TROX GmbHHeinrich-Trox-Platz47504 Neukirchen-Vluyn,GermanyTel. +49(0)2845 202 0Fax +49(0)2845 202 265www.trox.deE-mail: trox@trox.deRoom pressure controllerSauter RLP 100 F901/915Product informationRLP 100 F901/F915612Areas of applicationThe Sauter pneumatic room pressure controllerRLP 100 F901/F915 is designed for positive or negativepressure control of leak-proof spaces. The room pressurecontrol takes place in cascade with a Sauter RLP 100F003 flow volume controller that controls the flow volumecontrol unit in the supply or exhaust air. The control for aroom comprises a total of 3 controllers.1 Flow volume controllerRLP 100 F0032 T n adjusting knob (50%)*3 Direction of control action adjuster A/B4 x p adjusting knob, (100%)*5 ∆ p adjusting knob6 Hose connections* Factory settingType Pressure range Mode adjusterRLP 100 F901 -20 bis +20 Pa A BRLP 100 F915 -50 bis +50 Pa Exhaust air supply airCharacteristic curve of the actual value signalPaRoom pressure0.2 0.6 1.0 barActual value signal P MF915 -50 Pa 0 Pa +50 PaF901 -25 Pa 0 Pa +50 Pa345Room pressure controllerThe problem of controlling very leak-proof rooms cannotbe satisfactorily solved using the supply/exhaust airsequence control as measurement and control tolerancesas well as the unknown leakage degree of the room canlead to undesirably high room pressures or to room pressureswith the wrong sign in front of the number. With theroom pressure controller, the differential pressure betweenthe room pressure and that of a reference room ismeasured and controlled. The flow volume set value ofthe sequence controller is influenced within a limited rangealso by the room pressure controller in addition to themaster controllerFunction descriptionRoom pressure controllerThe measurement of the room pressure 1) is made usingthe static differential pressure principle. One measuringpoint for static pressure is installed in the room to be controlledand one in the reference room. If several roomsare connected together in a pressure cascade, the use ofa neutral reference pressure is recommended, e.g. a corridorthat is free from influence of wind and other pressurefluctuations. These pressures (room pressure differences)are measured using a diaphragm pressure transmitter.The actual value of the room pressure can be tapped offas a pneumatic signal P M . The room pressure set value isadjusted or supplied by an external command signal. Thecontroller compares the required room pressure with thecurrent actual value. This volume variation then effects achange on the flow volume controller.Function of the cascade controlThe flow volume set value is supplied by the room temperaturecontroller and limited to min and max . The setvalue is further offset within certain limits through thesecond command signal input (for room pressurecontroller).The damper actuator is controlled corresponding to thevolume variation. The flow volume controllers are usedtogether with Trox actuators. The adaptation of the controllerto the damper actuator direction of control action(NZ/NO) is made in the factory.1) The room pressure difference is simplified in this documentto room pressure13