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接口尺寸: | 螺纹(mm) | **: | 是 |
*护等级: | IP67 | 测量范围: | 0...60 kg SF /m3(kPa) |
类型: | Trafag,8774,SF6气体密度变送器,SF6混合气特高压气体密度传感器 | *爆等级: | IP67 |
型号: | Trafag,8774,SF6气体密度变送器,SF6混合气特高压气体密度传感器 | 测量介质: | SF6及混合气体 |
精度等级: | 1 | 品牌: | Trafag/瑞士 |
输出信号: | 4-20(mA) | 电源电压: | 4(V) |
Trafag,8774,SF6气体密度变送器,SF6混合气特高压气体密度传感器
Trafag,8774,SF6气体密度变送器,SF6混合气特高压气体密度传感器
基本技术参数:
适用于SF6气体或是其它气体
SF6气体密度变送器应用于高压及中压开关柜
SF6气体密度变送器测量原理:石英晶振测量
变送器测量精度:1.0
温度信号精度:环境温度下±2°C,在 -40...85°C: ±3°C
变送器输出:数字信号或是模拟电流
Trafag,8774,SF6气体密度变送器,SF6混合气特高压气体密度传感器
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
Di*al: current pulses onto supply current
Analogue: current loop
? Accuracy: ±1.8% FS max.
±1.0% FS t*.
The Trafag gas density sensor t*e 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 di*al 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
Di*al: current pulses onto supply current
Analogue: current loop
Accuracy
Accuracy: ±1.8% FS max.
±1.0% FS t*.
Repeatability: ±0.2% of measured value
Temperature signal
at ambient temperature ±2°C
at -40...85°C: ±3°C
Electrical data
Output signal
Di*al: 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
Di*al 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
*D: 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: br* nickel plated
Mounting: any position
Weight: approx. 200...400 g
Functional diagram
Di*al 2- or 3 wire Analogue 2-wire
Output Signal *ogue
Output Signal di*al
without pulses t*ical 2 mA
Dimensions
Adapters
8774
Trafag