原理

重锤料位计的先进电子器件采用智能电机控制。每个测量周期均以测锤/钢缆组件降至容器内部的方式启动。钢缆下降/提升的量等于在W55安装点下方自测量起始点至物料表面之间的无料空间距离。 该距离使用霍尔效应探测技术和微控制器计时器电路进行测量，测量分辨率在0.045"之内。在探测与物料表面接触时还采用了磁技术。测量数据刷新后，电机反向运行，测锤/钢缆返回至初始位置。达到介质可视化，过程自动化的目的。在上升过程中对距离进行测量和校验。

根据测得的距离和在配置过程中由操作员或安装员设定的有效测量范围确定料位。料位报警(高位和低位)与测得的料位进行比对，如必要，高位和低位报警继电器输出将改变状态。

重锤式料位计的智能电机传动系统控制着系在不锈钢钢缆上的重锤向下降，重锤接触介质表面的瞬间停止下降，而后重锤式料位计改变电机的转动方向将重锤收回。测量过程中，重锤式料位计通过专利的双光学传感器的精确计量，获取料位信号，并将料位信号变送为4~20mA模拟量信号、RS485信号或脉冲信号输出。

技术参数

供电电压: 115 VAC or 230 VAC, 50/60 Hz                                                                                                功率消耗: 6 VA 连续, 50 VA 间歇                                                                                                                  操作温度: -40° C ~ 65° C                                                                                                                              介质温度: 149°C(使用不锈钢钢缆时)/ 93°C(使用不锈钢衬套钢缆时)                                                            测量范围: 45.7 m                                                                                                                                         测量速度: 0.3 m/s                                                                                                                                      精 度: <测量距离的0.25%                                                                                                                         重 复 性: 30 mm                                                                                                                                            分 辨 率: 3mm                                                                                                                                            法 兰: "K" flange, 8" dia. w/ 7" bolt circle                                                                                                   电气接口: (2) 3/4" NPT                                                                                                                              钢 缆: 1/16 尼龙护层 (123kg 张力)                                                                                                                  3/64    不锈钢(无护层) (123kg 张力)                                                                                                              1/16 聚丙烯护层 (123kg 张力)                                                                                                                     输出信号:标准输出: RS-485 半双工                                                                                                             配线距离: 1,220 m                                                                                                                                     可 巡 址: 1-16 (可选开关)                                                                                                                           脉冲输出: 每1/10 英寸或分米一个脉冲,                                                                                                    模拟输出: 4-20 mA, 500 Ohms最大环路阻抗

运输重量: 18.2 kg (普通型)    31.8 kg (防爆型)                                                                                          外壳材质: 铸铝/ Noryl树脂涂层(普通型)       

          铸铝(防爆型)