268系列

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Setra Systems Model 268 and 268MR pressure transducers sense gauge(static) or differential pressure and convert this pressure difference to a proportional current or voltage output. The 268 series is offered with a high level analog 0 to 5 VDC, 0 to 10 VDC or 4-20mA output. The 268MR offers multi-range capability and field configurable output. The Model 268 is packaged in a die-cast aluminum enclosure that is specifically designed for IP65 service to withstand environmental effects. Used in Building Energy Management Systems, the 268 and 268MR pressure transducers are available for air pressure ranges as low as 0.1 in W.C. (25 Pa) full scale to 100 in. W.C. (25 kPa) full scale. Static accuracy is ±1% full scale in normal ambient temperature environments. The 268 series utilizes an improved all stainless steel micro-tig welded sensor, which is enclosed in a welded stainless steel body. The tensioned stainless steel diaphragm and insulated stainless steel electrode, positioned close to the diaphragm, form a variable capacitor. As the pressure increases or decreases, the capacitance changes. The change in capacitance is detected and converted to a linear DC electrical signal by Setra’s unique electronic circuit. The micro-tig welded tension sensor allows up to 10 psi overpressure(in either direction), with no damage to the unit.The improved sensor design also allows the Model 268MR version to have 6 field selectable pressure ranges (bi-directional and unidirectional) in one unit. The simple flip of a dip switch enables the userto easily field calibrate the unit with minimal effort. Explosionproof units are approved for ia II CT4. 

西特系统模型268和268mr压力传感器感测(静态)或压差,将压差成比例的电流或电压输出。268系列提供了一个高层次的模拟0至5伏,0至10 Vdc或4-20mA输出。268mr提供多方位的能力和现场配置的输出。模型268是封装在一个压铸铝外壳,是专为IP65服务抵御环境的影响。用于建筑能源管理系统,268和268mr压力传感器可用于空气压力范围低至0.1在厕所(25 Pa)满量程的100。厕所(25 kPa)全面。静态精度±1%满量程在常温环境。268系列采用一种改进的不锈钢微TIG焊接传感器,它是在一个封闭的焊接不锈钢体。张拉不锈钢隔膜和绝缘不锈钢电极,定位接近的隔膜,形成一个可变电容器。随着压力的增大或减小,电容的变化。检测由西特独特的电子电路转换成线性的直流电信号的电容变化。微焊接张力传感器允许高达10 psi的压力(或方向),不损坏的单元。改进传感器的设计也允许模型268mr版本有6场可选择的压力范围(双向和单向)在一个单位。一个DIP开关的简单的翻转使用户能够轻松地以最小的努力校准装置领域。防爆单位批准ia II CT4

 

Warm-up Shift  (精度)  ±0.1% FS Total  

Output(输出)* 4 to 20 mA**

 

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