Trafag,8774,SF6氣體密度變送器,SF6混合氣特高壓氣體密度傳感器

    Trafag,8774,SF6氣體密度變送器,SF6混合氣特高壓氣體密度傳感器

    基本技術(shù)參數(shù):

    適用于SF6氣體或是其它氣體

    SF6氣體密度變送器應(yīng)用于高壓及中壓開關(guān)柜

    SF6氣體密度變送器測(cè)量原理:石英晶振測(cè)量

    變送器測(cè)量精度:1.0

    溫度信號(hào)精度:環(huán)境溫度下±2°C,在 -40...85°C: ±3°C

    變送器輸出:數(shù)字信號(hào)或是模擬電流

    Trafag,8774,SF6氣體密度變送器,SF6混合氣特高壓氣體密度傳感器

• Continuous measurement數(shù)字信號(hào)可連續(xù)輸出無飄移
• Protection IP65防護(hù)等級(jí)IP65
• No maintenance無需維護(hù)
• Compact緊湊型設(shè)計(jì)
• Vibration and shock-proof防振動(dòng)和抗沖擊
• Suitable for outdoor usage適合戶外使用
• Response time <10ms與密度變化時(shí)響應(yīng)時(shí)間<10ms

    Application
    High voltage switchgear

    Medium voltage switchgear

   Main characteristics

    Density Sensor for SF6 and other gases
?  Principle:           Oscillating quartz measurement
?  Measuring range:     0...60 kg SF6 /m3
?  Output
      Digital:           current pulses onto supply current
      Analogue:          current loop
?  Accuracy:            ±1.8% FS max.
                         ±1.0% FS typ.

    The Trafag gas density sensor type 8774 was specifically designed for surveying insulation gases.
    The gas density is measured with an oscillating quartz with excellent long term stability. The constant resonant frequency of a quartz oscillator
under vacuum is compared with the resonant frequency of an identical quartz situated in the sample gas. The difference in the resonant frequency is proportional to the density of the sample gas. The measured density is proportional to the pulse frequency or to the mA output.

    With the digital variant additionally the temperature can be measured over the pulse width of the frequency signal.

   Main features

    Continuous measurement of density and temperature
?  long term drift free output signal
?  Protection IP65
?  No maintenance
?  Compact
?  Vibration and shock proof
?  Suitable for outdoor usage
?  Response time <10ms （with density changes）

   Ordering information

   Specifications
   

   Main characteristics

   Principle:           Oscillating quartz measurement
    Measuring range:     0...60 kg SF6 /m3
                         10 ... 253 Hz
    Output
      Digital:           current pulses onto supply current
      Analogue:          current loop

   Accuracy
    Accuracy:            ±1.8% FS max.
                         ±1.0% FS typ.
    Repeatability:       ±0.2% of measured value
    Temperature signal
      at ambient temperature  ±2°C
      at -40...85°C:         ±3°C

   Electrical data
    Output signal
      Digital:           current pulses
      Density signal:    pulse frequency
                         10...292 Hz （range 0...60 kg SF6/m3）
   Output signal
      Analogue:          6.5...20 mA
      Density signal:    current loop
                         10...275 Hz （range0...56.1 kg SF6/m3）
    Supply voltage
      Digital output:    2-wire, 10...20 VDC
                         3-wire, 14...28 VDC
        Ground: via gas connection of sensor
    Supply voltage
      Analogue output:   2-wire, 10...32 VDC
    Reaction time:       <10 ms （with density changes）
    Temperature signal: Pulse width 2188 ... 2565 ... 2975μs
                        （=Temp. -40...23...85°C）

   Environmental conditions
    Operating temperature: -40... +70°C
    Media temperature:     -40... +70°C
    Storage temp.:         -40... +85°C
    Operating pressure:    max. 15 bar
    Humidity:              suitable for outdoor usage;
                           55°C and 98% relative
    Protection:            1）IP65
    Vibration:             15 g （max. 6 mm）,（5...2000 Hz）
    Shock:                 100g/ 6 ms

    EMC Protection
    ESD:                   8kV/15kV air EN/IEC 61000-4-2
    Radiated Immunity:     10V/m, 80...2700Hz
                           EN/IEC 61000-4-3
    Burst:                 4kV EN/IEC 61000-4-4
    Surge:                 2kV （42 Ω） EN/IEC 61000-4-5
    Conducted Immunity:    10V, EN/IEC 61000-4-6

   Mechanical data
    Material:
      Pressure connection:  1.4435 （AISI316L）
      Tube                  1.4301
      O-Ring:               EPDM
      Male electrical plug: see ordering info.
      Screwed cable gland:  brass nickel plated
    Mounting:               any position
    Weight:                 approx. 200...400 g

   Functional diagram

     Digital 2- or 3 wire                                 Analogue 2-wire

    Output Signal analogue

    Output Signal digital

   without pulses typical 2 mA

    Dimensions

    Adapters

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