RIB41X Capacitive Pressure Transmitter Riels Instruments
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Catalog excerpts

RIB41X Capacitive Pressure Transmitter Riels Instruments - 1

CAPACITIVE PRESSURE TRANSMITTER PRESSURE CONTROL Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Capacitive pressure transmitter From 1 mbar* / resolution 1 μbar The Riels®Instruments RIB41X Series combines the ceramic measuring cell for low pressure fields with the μP electronics of the Series 30 digital transmitter. The pressure values from the pressure and temperature sensor signals are determined by polynomial compensation (see back). It is possible to view the values and store them on a PC via an RS485 interface; programming is also possible. The transmitters are calibrated on the basic measuring range. The PROG30 software allows you to program the analog output signal in each section of the field within the basic measurement range (eg. Range of 100 mbar. Output at 4÷20 mA for 20÷60 mbar). With the K-100 Series of Riels®Instruments RS converters it is possible to connect up to 128 transmitters together in a bus system and then read them via a PC or laptop. The READ30 software allows you to read the current pressure of each transmitter and to store or record "on line" the pressure activity of the various transmitters. This pressure transmitter is also available in an intrinsically safe version (RIB41X Ei Series). It is used in areas subject to explosion, where categories 1 and 2 are required. * by dividing the field by 10 mbar. Specifications RIB41X (relative) RIB41X (differential) Overpressure Negative overpressure Power supply (U) 41 X Power supply (U) 41 X Ei Analog output (scalable) Load (kΩ) Stability Operating temperature Compensated field Error range* Standard FS Pressure ranges 30 100 300 mbar 300 1000 1500 mbar 30 100 300 mbar 2 Cavi 3 Cavi 8÷28 VDC 13÷28 VDC 10÷28 VDC 15÷28 VDC 4÷20 mA 0÷10 V < (UB-UBmin.)/20 mA ≥ 100 FS ≥ 100 mbar: ± 0,1 %FS FS ≤ 100 mbar: ± 0,1 mbar -20÷80 °C 10÷50 °C ± 0,1 %FS standard ± 0,2 %FS max. All intermediate ranges for the analogue output can be made without surcharge by staggering the standard ranges **. Option: adjustment directly on the intermediate fields (with an increase under 20 pieces). For higher pressure ranges and “wet / wet” differential applications, RIELS offers the RIB33X Series and RIB39X Series respectively. ** note that the error range will increase proportionally * within the compensated temperature range Pressure connection port Electrical connection Material in contact with environmental elements PD-reference side Protection/ Weight Special versions G1/4 ”male, Viton® flat gasket 723 Series Connector (5-pin) Stainless steel (AISI 316L), nitrile o-ring, gold-coated ceramic diaphragm Non aggressive dry gases IP 40 / ca. 190 g IP 67 - Alternative sockets - Cable version - Negative / positive pressure ranges: ex. -10 ÷ + 10 bar - Intrinsically safe version for use in areas subject to explosione

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RIB41X Capacitive Pressure Transmitter Riels Instruments - 2

Polynomial compensation A mathematical model is used to derive the exact value of the pressure (P) from the signals measured by the pressure sensor (S) and the temperature sensor (T). The microprocessor inside the transmitter calculates P using the following polynomial: P(S,T) = A(T) � S0 + B(T) � S1 + C(T) � S2 + D(T) � S3 With the following coefficients A (T) ... D (T) which depend on the temperature: A(T) = A0 � T0 + A1 � T1 + A2 � T2 + A3 � T3 B(T) = B0 � T0 + B1 � T1 + B2 � T2 + B3 � T3 C(T) = C0 � T0 + C1 � T1 + C2 � T2 + C3 � T3 D(T) = D0 � T0 + D1 � T1 + D2 � T2 + D3 � T3 Tutti i...

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