SHARKY 774 compact

SHARKY 774 compact

SHARKY 774 Compact

The ultrasonic compact energy meter can be used for measuring the energy consumption in heating or cooling application for billing purposes. The measurement principle is static and based on the measurement of the transit time. Ultrasonic technology offers many benefits: no moving parts (avoids wear and tear of the metering components), low pressure loss, large metering dynamics and low start flowrate, insensitiveness to suspended particles.

  • AMR Smart Meter
  • M-Bus or wM-Bus Radio. Combined with Diehl Metering AMR System technology highest transmission performance is achievable
  • Constantly high measuring rates (vol.: 2 s; temp.: 16 s) with up to 12 years battery lifetime. Current power is calculated and updated every 2 s.
  • AA-cells contain less lithium (0.7 g per piece) than A-cells.
  • Springless battery contact (hard-solder) is corrosion-protected
  • MID class 2 and PTB K7.2
  • MID electromagnetic class E2 and mechanical class M2 – less sensitive to neg. influence, e.g. culprit PWM pump
  • 8-digit LCD offers 3 fractional digits without risk of display overflow.
  • Only 54 mm design hight from pipe center, hence easy to install in compact heat stations
  • MID class 2
  • General
    ApplicationHeating - cooling - heating/with cooling tariff
    ApprovalMID for heating and PTB K7.2 for cooling
    Accuracy classClass 2
    Ambient temperature°C+5 ... +55 (<35 have a positive effect on battery lifetime)
    Storage temperature°CTypical +5 ... +55 | max. -20 ... +60 (max. 4 weeks)
    Humidity%Max. 93
    Battery supply13.6 VDC (2xAA-cell), up to 12 years lifetime (at standard conditions of use and temperature)
    Lithium contentg2 x 0.7
    Temperature sensor typePt 500, 2-wire; Ø 5.2 mm
    Cable length of temperature sensorm1.45 / 1.95
    Test possibilitiesVia display
    Volume measuring cycleTs2
    Temperature measuring cycleTs16
    Power calculation cycleTs2
    1 battery exchangeable at lab
  • Flow sensor - basic features
    Dynamic range (qp/qi)1:100
    Useful range (qs/qp)2:1
    Temperature range (heating)°C5 ... 105 / 5 ... 130
    Temperature range (cooling)°C2 ... 50
    Temperature range (heating with cooling tariff)°C5 ... 105
    Protection classHeating IP 54 | Heating with cooling tariff / cooling IP 68 (at normal ambient air pressure)
    Mounting position flow sensorAny position, horizontal, riser or downpipe and overhead
  • 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 range (heating)Θ°C1 ... 105 / 1 ... 130
    Absolute temperature range (cooling)Θ°C1 ... 50
    Starting temperature differenceΔΘK0.125
    Min. temperature differenceΔΘminK3
    Max. temperature differenceΔΘmaxK90 / 120 (heating) | 50 (cooling)
    Extensive readable data memoryTwo 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
    OpticalAccording to ZVEI standard
    DisplayLCD Display
    M-BusAccording to EN13757-3:2013
    Wireless M-BusAccording to EN13757-4:2013
  • Display
    Display indication8-digit
    UnitskWh - MWh - GJ - m³ - °C
    Total values99.999,999
    Values displayed (main loop)Energy - Volume - Flow - Power - Temperature - Differential temperature - Operating days - Error Status - Display test
  • M-Bus
    M-BusAuto baud detect (300 and 2400 baud); galvanically isolated
    Data transmissionData reading via two wires with non polarity (1.5 m)
    Battery1 lifetimeUp to 12 years
    1 battery exchangeable at lab
  • Wireless M-Bus
    Frequency band868 or 434 MHz
    Type of radio telegramOpen Metering Standard (OMS)
    Transmission data updatingOnline - no time delay between value measurement and data transmission
    Data transmissionUnidirectional
    Battery1 lifetimeRapid mode: up to 6 years; standard mode: up to 12 years (depends on sending interval)
    Sending interval options2Rapid mode (drive-by): 14 s + synchron telegram (OMS 3.0): 900 s | standard mode (walk-by): 64 s + synchron telegram (OMS 3.0): 900 s
    1 battery exchangeable at lab
    2 factory settings
  • Technical data flow sensor
    Nominal flow rateqpm³/h0.61.51.52.5
    Nominal diameterDNmm15152020
    Overall lengthLmm110110130130
    Starting flow ratel/h12.52.54
    Minimum flow rateqil/h6151525
    Maximum flow rateqsm³/h1.2335
    Overload flow ratem³/h2.54.64.66.7
    Operating pressurePNbar16161616
    kv value (qp² (m³/h) = kv² x Δp (bar))1.954.335.487.91
    Pressure loss at qpΔpmbar9512075100
  • Dimensions thread version
    Nominal flow rateqpm³/h0.61.51.52.5
    Nominal diameterDNmm15152020
    Overall lengthLmm110110130130
    Overall length with couplingL2mm190190230230
    Length of calculatorL1mm90909090
    HeightHmm14.514.51818
    HeightH1mm55555858
    Height of calculatorH2mm27272727
    Height of calculatorH3mm40404040
    Width of calculatorBmm135135135135
    Connection thread on meterInchG¾BG¾BG1BG1B
    Connection thread of couplingInch
    Weightkg0.700.700.770.77
  • Pressure loss graph / Typical error graph