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Catalogue Pressure Transmitter

26 www.bdsensors.com DMP 331Pi Technical Data DMP 331Pi Precision Pressure Transmitter Technical Data Pressure ranges 1 Nominal pressure gauge / absolute 2 [bar] 0.4 1 2 4 10 20 40 Overpressure [bar] 2 5 10 20 40 80 105 Burst pressure ≥ [bar] 3 7,5 15 25 50 120 210 Vacuum resistance PN ≥ 1 bar: unlimited vacuum resistance PN < 1 bar: on request 1 On customer request we adjust the device within the turn-down-possibility by software on the required pressure range. 2 absolut pressure permissible from 1 bar Vacuum ranges Nominal pressure [bar] -0.4 ... 0.4 -1 ... 1 -1 ... 2 -1 ... 4 -1 ... 10 Overpressure [bar] 2 5 10 20 40 Burst pressure ≥ [bar] 3 7.5 15 25 50 Output signal / Supply Standard 2-wire: 4 ... 20 mA / VS = 12 ... 36 VDC Option IS-protection 2-wire: 4 ... 20 mA / VS = 14 ... 28 VDC Options 2-wire: 4 ... 20 mA with communication interface 3 3-wire: 0 ... 10 V / VS = 14 ... 30 VDC 0 ... 10 V with communication interface 3 3 only possible with el. connection Binder series 723 (7-pin) Performance Accuracy 4 performance after turn-down - TD ≤ 1:5 - TD > 1:5 IEC 60770: ≤ ± 0.1 % FSO no change of accuracy 5 for calculation use the following formula (for nominal pressure ranges ≤ 0.40 bar see note 5): ≤ ± [0.1 + 0.015 x turn-down] % FSO with turn-down = nominal pressure range / adjusted range e.g. with a turn-down of 1:10 following accuracy is calculated: ≤ ± (0.1 + 0.015 x 10) % FSO i.e. accuracy is ≤ ± 0.25 % FSO Permissible load current 2-wire: Rmax = [(VS – VS min) / 0.02 A] Ω voltage 3-wire: Rmin = 10 kΩ Influence effects supply: 0.05 % FSO / 10 V load: 0.05 % FSO / kΩ Long term stability ≤ ± (0.1 x turn-down) % FSO / year Response time < 5 msec Adjustability configuration of following parameters possible (interface / software necessary 6 ): - electronic damping: 0 ... 100 sec - offset: 0 ... 90 % FSO - turn down of span: max. 1:10 4 accuracy according to IEC 60770 – limit point adjustment (non-linearity, hysteresis, repeatability) 5 except nominal pressure ranges ≤ 0 .40 bar; for these calculation of accuracy is as follows: ≤ ± (0.1 + 0.02 x turn-down) % FSO e.g. turn-down of 1:3: ≤ ± (0.1 + 0.02 x 3 ) % FSO i.e. accuracy is ≤ ± 0.16 % FSO 6 software, interface, and cable have to be ordered separately (software appropriate for Windows ® 95, 98, 2000, NT Version 4.0 or higher, and XP) Thermal effects 7 (Offset and Span) / Permissible temperatures Tolerance band [% FSO] ≤ ± (0.35 x turn-down) in compensated range -20 ... 80 °C TC, average [% FSO / 10 K] ≤ ± (0.035 x turn-down) in compensated range -20 ... 80 °C Permissible temperatures 8 medium: -40 ... 125 °C for filling fluid silicon oil -10 ... 125 °C for filling fluid food compatible oil electronics / environment: -25 ... 85 °C storage: -40 ... 100 °C Permissible temperature medium for cooling element 300°C filling fluid silicon oil overpressure: -40 … 300 °C vacuum: -40 ... 150 °C 9 filling fluid food compatible oiloverpressure: -10 ... 250 °C vacuum: -10 ... 150 °C 9 7 an optional cooling element can influence thermal effects for offset and span depending on installation position and filling conditions. 8 max. temperature of the medium for nominal pressure gauge > 0 bar: 150 °C for 60 minutes with a max. environmental temperature of 50 °C 9 also for Pabs ≤ 1 bar Electrical protection Short-circuit protection permanent Reverse polarity protection no damage, but also no function Electromagnetic compatibility emission and immunity according to EN 61326 Filling fluids Standard silicon oil Options food compatible oil with FDA approval (Mobil DTE FM 32; Category Code: H1; NSF Registration No.: 130662) others on request Mechanical stability Vibration (DIN EN 60068-2-6) G 1/2": 20 g RMS (25 ... 2000 Hz); others except G 1/2": 10 g RMS (25 … 2000 Hz) Shock (DIN EN 60068-2-27) G 1/2": 500 g / 1 msec; others except G 1/2": 100 g / 1 msec

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