SHARKY 774 compact

SHARKY 774 compact

ULTRASONIC COMPACT METER

SHARKY 774 COMPACT ultrasonic energy meter is designed for measuring the energy consumption in heating or bifunctional (heating/cooling) application for billing purposes. Its static ultrasonic technology is based on the measurement of the transit time. It offers many benefits: no moving parts (reduces wear and tear of the metering components), low pressure loss, wide dynamic measuring range, low start flowrate and insensitiveness to suspended particles.

  • M-Bus or Wireless M-Bus (OMS radio 868 MHz) communication. Enhanced transmission performance is achieved when combined with Diehl Metering AMR system technology
  • Heat-transfer fluid: water
  • Constant high measuring rates of the temperatures and volume with up to 12 years battery life time
  • 8-digit LCD
  • Removable calculator (0.45m coaxial cable) ensuring comfortable reading
  • General
    ApplicationHeating or bifunctional (heating /cooling) | Heat-transfer fluid: glycol-free water
    ApprovalMID (DE-13-MI004-PTB008)
    Accuracy classClass 2
    Ambient temperature°C+5 ... +55 (<35 has a positive effect on battery lifetime)
    Storage temperature°C+5 ... +55 | max. -20 ... +60 (max. 4 weeks)
    Humidity%93 maximum
    Battery supply3.6 VDC 2xAA-Cell
    Lithium contentg2 x 0.7
    Temperature sensor typePt 500, 2-wires: Ø 5.2 mm
    Cable length of temperature sensorm1.45
    Test possibilitiesVia display
    Volume measuring cycles2
    Temperature measuring cycles16 (long radio telegram + Mbus) / 32 (short radio telegram)
    Power calculation cycles2
  • Flow sensor - basic features
    Dynamic range (qp/qi)1:100
    Mounting position flow sensorAny position, calming section not necessary
    Temperature range (heating)°C+5 ... +105*
    Temperature range (heating/cooling)°C+5 ... +105
    Protection classIP54 (heating) - IP68 (heating/cooling)
    * +130°C in option
  • Calculator - basic features
    Protection classIP 65
    Environmental class - mechanicalM1, M2
    Environmental class - electromechanicalE1, E2
    CalculatorRemovable, with 0.45 m cable to flow sensor
    Absolute temperature rangeΘ°C+1 ... +105 (+130 in option)
    Starting temperature differenceΔΘK0.125
    Min. temperature differenceΔΘminK3 (MID approved)
    Max. temperature difference (heating)ΔΘmaxK127 (MID approved)
    Extensive readable data memory2 predefined history logs for 720 daily (Log-1) and 120 monthly (Log-2) values of energy, volume and error hours; additonally event memory (error log)
  • Interfaces
    OpticalZVEI interface, for communication and testing, M-Bus protocol
    DisplayLCD, 8-digit
    M-BusAccording to EN13757-3:2013
    Wireless M-BusAccording to EN13757-4:2013
  • Display
    Display indicationLCD, 8-digit
    UnitskWh - m³ - °C - m3/h *
    Total values99,999.999
    Values displayed (main loop)Energy - Volume - Flow - Power - Temperature - Differential temperature - Operating days - Error Status - Display test
    * MWh - GJ in option
  • M-Bus
    M-BusAuto baud detect (300 and 2,400 bauds); galvanically insulated
    Data transmissionData reading via 2 non-polarized wires (1.45 m)
    Battery lifetimeUp to 12 years*
    *Under standard conditions of use and temperature. Theoretical lifetime, with no guarantee.
  • Wireless M-Bus (radio)
    Frequency band868 MHz
    Type of radio telegramOpen Metering Standard (OMS)
    Transmission data updatingOnline - no time delay between value measurement and data transmission
    Data transmissionUnidirectional
    Battery lifetimeUp to 12 years*
    Sending interval options1Short telegram: 33 sec. for heating, 43 sec. for heating/cooling | Long telegram: 64 sec. for heating, 91 sec. for heating/cooling
    *Under standard conditions of use and temperature. Theoretical lifetime with no guarantee.
    1Factory settings
  • Technical data flow sensor
    Nominal flow rateqpm³/h1.52.5
    Nominal diameterDNmm1520
    Overall lengthLmm110130
    Starting flow ratel/h2.54
    Minimum flow rateqil/h1525
    Maximum flow rateqsm³/h35
    Overload flow ratem³/h4.66.7
    Operating pressurePNbar1616
    Kvs value (Δp=Q2/Kvs2)4.337.91
    Pressure loss at qpΔpmbar120100
  • Dimensions thread version
    Nominal flow rateqpm³/h1.52.5
    Nominal diameterDNmm1520
    Overall lengthLmm110130
    Overall length with couplingL2mm190230
    Length of calculatorL1mm9090
    HeightHmm14.518
    HeightH1mm5558
    Height of calculatorH2mm2727
    Height of calculatorH3mm4040
    Width of calculatorBmm135135
    Connection thread on meterinchG¾BG1B
    Connection thread of couplinginch
    Weightkg0.700.77
  • Pressure loss graph / Typical error graph