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product picture of the ultrasonic flowmeter FLOWSIC500

FLOWSIC500
ultrasonic flowmeter

Custody transfer measurement in natural gas distribution

IFL500
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测量/应用任务

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  • 测量原理

    Ultrasonic transit time difference measurement

  • Measured variables

    Volume a. c., volumetric flow a. c., gas velocity, volume s. c. (*), volume flow under s.c. (*)
    (*) additional function included with integrated volume correction

  • Measuring Medium

    Natural gas (dry, odorized)

  • Repeatability

    ≤ 0.1 %

  • Accuracy

    Qmin up to 0.1 Qmax ≤ ± 1 %
     
    0.1 Qmax up to Qmax ≤ ± 0.5 %
    Accuracy class 1; maximum allowed error limits
     
    Qmin up to 0.1 Qmax ≤ ± 2 %
     
    0.1 Qmax up to Qmax ≤ ± 1 %
    After high pressure flow calibration: ±0.2 % at test pressure; otherwise ±0.5 %

  • Medium temperature range

    -25 °C ... +60 °C
    Optional: –40 °C ... +70 °C
     
    (–13 °F ... +140 °F
    Optional: –40 °F ... +158 °F)

  • Operating pressure range

    PN16 (EN 1092-1): 0 bar (g) ... 16 bar (g) / 0 psi(g) ... 232 psi(g)
     
    Class 150 (ASME B16.5): 0 bar (g) ... 20 bar (g) / 0 psi(g) ... 290 psi(g)

  • Nominal pipe size

    DN 50 (2") … DN 150 (6")

  • Metrological approvals and certificates

    MID: 2014/32/EU
    OIML R 137-1&2:2012
    EN 12405: 2010 (for integrated flow conversion)

  • Hazardous area approvals

    IECEx
    Ex ia [ia] IIC T4 Gb, Ex op is IIC T4 Gb
     
    ATEX
    II 2G Ex ia [ia] IIC T4 Gb, II 2G Ex op is IIC T4 Gb
     
    NEC/CEC (US/CA)
    CSA: I.S. for Class 1 Division 1 Groups C and D T4; Ex/AEx ia IIB T4 Ga

  • Digital Outputs

    Configurations:
    LF pulses + malfunction, electrically isolated (fmax = 100 Hz)
     
    HF pulses + malfunction, electrically isolated (fmax = 2 kHz)
     
    Encoder + LF pulses, electrically isolated (fmax = 100 Hz)
     
    Encoder + HF pulses, not electrically isolated (fmax = 2 kHz)
     
    2x pulses, HF and LF, electrically isolated (fmax = 2 kHz / 100 Hz)

  • Digital communication

    R-S485 (external powered, in combination with LF- or HF pulses)

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