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DP21型3051电容差压变送器广州东仪压力差压变送器广泛应用于食品、饮料、乳业、酿酒、制药、自来水厂、城市用水、水处理工程、环保净化、水产养殖、农业灌溉、畜牧业、石油、化工、煤矿开采、冶金、电力、水泥建材、机械、造纸、纺织、陶瓷、化纤、橡胶等工业领域,欢迎广大用户咨询。
一、产品概述
DP21型3051电容差压变送器广州东仪电容式压力差压变送器的关键原材料、均经过严格的检测,整机经过严格组装和测试。该产品具有设计原理先进、品种规格齐全、安装使用简便等特点。外观上融合其它产品的结构优点,该系列产品设计精致外,产品模块化设计和全贴片封装,多款精致*的塑料模具配以先进的激光雕刻手段,使得产品更加紧凑。为适合国内自动化水平的不断提高和发展,该系列产品除设计小巧精致外,更推出具有HART现场总线协议的智能化功能。并具有很强的通用性和替代能力。
二、工作原理
电容式压力差压变送器采用单晶硅谐振传感器,采用微电子表面加工技术,除了保证测量精度外,还可实现抵制静压、温飘对其影响。当被测压力P1和P2分别由导入管进入高、低压室时,由于P1 >P2隔离膜片中心将发生位移,压迫电解质使高压侧容积变小。当电解质为不可压缩体时,其容积变化量将引起检测膜片中心向低压侧位移,此位移量和隔离膜片中心位移量相等。根据电工学,当组成电容的两极板极间距发生变化时,其电容量也将发生变化,即从C1=C2变为C1≠C2。此电容变化量由电容/电流转换电路转换成电流信号Id,Id信号经信号处理器处理后经放大得到整机的输出信号IO。
三、产品特点
应用范围广,用于压力、差压、液位、流量等测量
直接感测、不受介质起泡、沉积的影响
精度高:数字精度±0.05%;模拟精度±0.5%~±0.1%F.S
量程、零点外部连续可调,量程比100:1
正迁移可达500%、负迁移可达600%
稳定性能好,稳定性:0.25% 60个月
抗干扰设计、抗干扰能力强
LCD液晶显示
接触介质的膜片材料可选
低压浇铸铝合金壳体
测量速率:0.2S
小型化全不锈钢法兰,易于安装
过程连接与其它产品兼容,实现最佳测量
采用16位计算机的智能变送器
标准4-20mA,带有基于HART协议的数字信号。
采用激光打标签,确保产品可溯源
四、产品应用
广泛应用于食品、饮料、乳业、酿酒、制药、自来水厂、城市用水、水处理工程、环保净化、水产养殖、农业灌溉、畜牧业、石油、化工、煤矿开采、冶金、电力、水泥建材、机械、造纸、纺织、陶瓷、化纤、橡胶等工业领域
五、技术参数
使用对象 :液体、气体和蒸汽
测量范围:0-40MPa
供电电压 :12~30V DC,标准值24VDC;
输出信号 :4~20mADC、1~5V、(可选HART协议);
环境温度 :-25~70℃ (一般变送器),
-15~70℃ (带现场指示器)
测量温度 :-20-100℃,法兰灌充硅油-20-104℃,灌充高温硅油
15-300℃
储藏温度 : -20~80℃;
相对温度 :0-100%RH
防护等级 :dⅡBT4 iaⅡCT5 ;
电源影响 :小于输出范围的 ±0.005%/V;
振动影响 :在任何方向上振动 200Hz ,引起的误差为最大范围
的 0.05%/g(微差压为0.25%/g) ;
安装位置影响:当工作膜片未垂直安装时,可能产生不大于
0.24Pa 的零位误差,误差可通过调整零位来消除,对量程无影响;
现场显示 :现场输出指示器有电流表,线性指示 0~100%;3-1/2位LCD 液晶显示 量程和零位 :外部连续可调;
正负迁移:差压变送器:最大正迁移量为 500% ,最大负迁移量为 600%
材料隔离膜片 :316L不锈钢,哈式合金-C ,蒙耐尔合金,钽
排气/排液阀 : 316L不锈钢,哈式合金-C,蒙耐尔合金
法兰和接头 : 316L不锈钢,哈式合金-C ,蒙耐尔合金
"O" 型圈:氟橡胶
灌充液 :硅油 惰性油
螺栓 : 316L 不锈钢
电子壳体 :低铜铝合金
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