| 接口尺寸： | 螺紋（mm） | 加工定制： | 是 |
| 防護等級： | IP67 | 測量范圍： | 0...60 kg SF /m3（kPa） |
| 類型： | Trafag,8774,SF6氣體密度變送器,SF6混合氣特高壓氣體密度傳感器 | 防爆等級： | IP67 |
| 型號： | Trafag,8774,SF6氣體密度變送器,SF6混合氣特高壓氣體密度傳感器 | 測量介質(zhì)： | SF6及混合氣體 |
| 精度等級： | 1 | 品牌： | Trafag/瑞士 |
| 輸出信號： | 4-20（mA） | 電源電壓： | 4（V） |
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氣體密度變送器測量原理:石英晶振測量
變送器測量精度:1.0
溫度信號精度: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
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 b 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 inbation
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
Reb time: <10 ms (with density changes)
Temperature signal: Pulse b 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 b
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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