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Catalogue Differential Pressure

12 www.bdsensors.com Technical Data DMD 831 Differential Pressure Transmitter with Display and Contact for Fluids and Gases ► 2 piezoresistive stainless steel sensors ► differential pressure from 0 ... 1 bar up to 0 ... 70 bar ► display and pressure port rotatable Input pressure range Type D5 D6 D7 D8 DA DB H1 Differential pressure range [bar] (calibration) 0 … 1 0 … 2 0 … 3,5 0 … 7 0 … 20 0 … 35 0 … 70 Permissible static pressure [bar] one-sided 1 2 3,5 7 20 35 70 Analogue signal / Supply Standard 3-wire: 4 ... 20 mA 24 VDC ± 10 % Permissible load 500 Ω Accuracy 1 ≤ ± 1 % BFSL 1 accuracy according to IEC 60770 – limit point adjustment (non-linearity, hysteresis, repeatability) Contact Number, type standard: 1 PNP option: 2 independent PNP Max. switching current 125 mA, short-circuit proof Switching accuracy 1 ≤ ± 0.5 % FSO Repeatability ≤ ± 0.1 % FSO Switching cycles > 100 x 106 Delay time 0 ... 100 sec Programming Adjustability analogue output / contact refers to: - pressure (+ port) - pressure (- port) - differential pressure Turn-Down: max. 1:10 Thermal error 2 (offset and span) / Permissible temperatures Tolerance band ≤ ± 1.5 % FSO TC, average ± 0.2 % FSO / 10 K In compensated range 0 ... 70 °C Permissible temperatures medium: -40 ... 125 °C electronics / environment: -25 … 85 °C storage: -40 ... 85 °C 2 relating to nominal pressure range Electrical protection Short-circuit protection permanent Reverse polarity protection no damage, but also no function Electromagnetic compatibility emission and immunity according to EN 61326 Differential pressure Transmitter

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