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ZNLUCB型插入式 涡街流量计 主要用于各种行业工业管道中大口径气体、液体、蒸汽介质流体的流量测量,插入式 涡街流量计 特点是压力损失小,量程范围大,精度高,在测量工况体积流量时几乎不受流体密度、压力、温度、粘度等参数的影响。无可动机械零件，因此可靠性高,维护量小。仪表参数能长期稳定。插入式 涡街流量计 采用压电应力式传感器,可靠性高,可在-20℃～+250℃的工作温度范围内工作。有模拟标准信号,也有数字脉冲信号输出,容易与计算机等数字系统配套使用,是一种比较先进、理想的流量仪表。。
ZNLUCB 型插入式 涡街流量计 防爆型，符合GB3836-83《爆炸性环境用防爆电气设备》的有关规定，防爆标志为ExdIIBT6。
工作原理
按国际标准化组织IS07145(在环形截面封闭管道中的流体流量测定—在截面一点的速度测量法)，采用埋入压电晶体的涡街测速探头，插入大口径工业管道内，将卡门旋涡频率转换为与流量成正比的电流或电压脉冲信号或4～20mADC电流信号。
仪表特点
1、 可测量蒸汽,气体,液体的体积流量和质量流量；
2、无机械运动部件,测量精度高,结构紧凑维护方便；
3、压力损失小,量程范围宽；范围度达1:25；
4、采用消扰电路和抗振传感头；
5、采用消扰电路和抗振传感头，使仪表具有一定抗环境振动性能；
6、可测介质温度达+250℃。
7、可实现不断流拆装传感器，可实现放大器与传感器分离（分离距离15m）；
技术参数
表1
| 公称通经（mm） |
250～1500 |
|
仪表材质 |
1Cr18Ni 9Ti |
|
公称压力（Mpa） |
PN1.6Mpa；PN2.5Mpa |
|
被测介质温度（℃） |
－40～+250℃ |
|
环境条件 |
温度－10～+55℃，相对湿度5％～90％，大气压力86～106Kpa |
|
精度等级 |
示值的±2.5% |
|
量程比 |
1:10；1:15 |
|
阻力损失系数 |
Cd<2.6 |
|
输出信号 |
传感器：脉冲频率信号0.1 ~ 3000Hz 低电平≤1V 高电平≥6V |
|
供电电源 |
传感器：、+24VDC |
|
信号传输线 |
KVVP3×0.3（三线制），2×0.3（二线制） |
|
传输距离 |
≤500m |
|
信号线接口 |
内螺纹M20×1.5 |
|
防爆等级 |
ExdIIBT6 |
|
防护等级 |
IP65 |
|
允许振动加速度 |
1.0g |
型号及功能选择
ZNLUCB型插入式涡街
|
代号 |
口径 |
|||||
|
020 |
200mm |
|||||
|
025 |
250mm |
|||||
|
030 |
300mm |
|||||
|
035 |
3500mm |
|||||
|
040 |
400mm |
|||||
|
045 |
450mm |
|||||
|
050 |
500mm |
|||||
|
-------- |
-------- |
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|
200 |
2000mm |
|||||
|
代号 |
功能1 |
|||||
|
N |
无温压补偿 |
|||||
|
Y |
有温压补偿 |
|||||
|
代号 |
输出型号 |
|||||
|
F1 |
4-20mA输出（二线制） |
|||||
|
F2 |
4-20mA输出（三线制） |
|||||
|
F3 |
RS485通讯接口 |
|||||
|
代号 |
被测介质 |
|||||
|
J1 |
液体 |
|||||
|
J2 |
气体 |
|||||
|
J3 |
蒸汽 |
|||||
|
代号 |
功能2 |
|||||
|
E |
2.5级 |
|||||
|
T1 |
常温 |
|||||
|
T2 |
高温 |
|||||
|
T3 |
蒸汽 |
|||||
|
P1 |
1.6MPa |
|||||
|
P2 |
2.5MPa |
|||||
|
P3 |
4.0MPa |
|||||
|
D1 |
内部3.6V供电 |
|||||
|
D2 |
DC24V供电 |
|||||
|
B1 |
不锈钢 |
|||||
|
B2 |
碳钢 |
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