Differential pressure Deltabar FMD77

  • Measuring principle

    Differential pressure

  • Characteristic

    Digital transmitter with metallic measuring diaphragms, one side with diaphragm seal
    Modular transmitter
    Long-term stability
    Secondary process barrier
    enhanced saftey via self diagnostic functions

  • Supply voltage

    4…20mA HART
    10,5…45V DC (Non Ex):
    Ex ia: 10,5…30V DC
    PROFIBUS PA:
    9…32 V DC (Non Ex)
    FOUNDATION Fieldbus:
    9…32 V DC (Non Ex)

  • Reference Accuracy

    0,075% + influence of diaphragm seal

  • Long term stability

    0.08 % of URL/ year
    0.14 % of URL/ 5 years
    0.27 % of URL/ 10 years

  • Process temperature

    -40°C…400°C
    (-40°F…752°F)

  • Ambient temperature

    -50°C…85°C
    (-58°F…185°F)

  • Measuring cell

    100 mbar…16 bar
    (40 inH20…240 psi)

  • Smallest calibratable span

    5 mbar (0.075 psi)

  • Vacuum resistance

    50 mbar (0.73 psi)

  • Max. Turn down

    100:1

  • Max. overpressure limit

    160 bar
    (2400 psi)

  • Process connection

    Low pressure side:
    1/4-18NPT
    RC1/4″
    High pressure side:
    Flanges (DIN, ASME, JIS)

  • Material process membrane

    316L, AlloyC,
    Tantal,
    Gold-Rhodium,
    PTFE

  • Material gasket

    None, diaphragm seal welded

  • Fill fluid

    Silicone oil,
    Inert oil,
    Vegetable oil
    Low- temperature oil
    High- temperature oil

  • Material housing

    316L, Die-cast aluminum

  • Communication

    4…20 mA HART
    PROFIBUS PA
    FOUNDATION Fieldbus

  • Certificates / Approvals

    ATEX, FM, CSA, CSA C/US, IEC Ex, INMETRO, NEPSI, EAC, UK Ex

  • Safety approvals

    SIL

  • Design approvals

    NACE MR0175
    EN10204-3.1

  • Specialities

    Diagnostic functions

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