Dwyer DH3系列微差压变送器 品牌创新

产品介绍：

dh3系列 digihelic®微差压控制器和photohelic®尺寸一样的数显微差压控制器，有用于流量测量的开方输出，是一款三合一的组合仪表，它将数显表，控制开关和变送器组合成一体。这样组合不仅仅节约了仓储空间，还节省了安装费用和时间。digihelic®微差压控制器Zui适用于测量差压，风速或风量的应用场合。量程低至0.25到2.5英寸水柱的范围时精度为1%，量程大于或等于5英寸水柱时的精度为0.5%，还可以有正负组合量程。

digihelic®微差压控制器可选各种通用的压力，风速，风量工程单位，它带有2个单刀双掷的开关，可调回差，并且还输出可对应量程的4-20ma输出信号。

采用面板上的按键编程配置非常容易：安全设置，工作方式选择（压力，风速或风量），工程单位选择，k系数选择，圆管方管选择，报警设定点设置，手动自动复位选择，报警延迟，峰谷值记录，数字阻尼，4-20ma对应量程等等。

应用

•管道scfm流量

• 过滤器状态

• 管道和建筑物的静压

• 风门控制装置

• 风机控制

技术参数：

介质:空气、不可燃兼容气体

材质:联系工厂.

外壳材料:铸铝外壳和遮光板.

度: ±1.5%对于量程是 0.25??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771和±0.25??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771 w.c..量程 0.5??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771-5??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771 w.c. 和相应双向的(除了±2.5??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771 w.c.) ±1%;所有其它量程: ±0.5% @77°f (25°c) 包括迟滞和重复性(在变热1小时之后).

稳定性: < ±1%每年.

压力范围: 量程≤ 2.5 in w.c.: 25 psi; ±2.5??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771, 5 in w.c.: 5 psi; 10 in w.c.: 5psi; 25 in w.c.: 5 psi; 50 in w.c.: 5 psi; 100 in w.c.: 9 psi.

温度范围: 32 to 140°f (0 to 60°c).

补偿温度范围: 32 to 140°f (0 to 60°c).

温度效应: 0.020%/°f (0.036/°c) from 77°f (25°c). for 0.25??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771 and ±0.25??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771w.c. ranges: ±0.03%/°f (±0.054%/°c).

电源: 12-28 vdc, 12-28 vac 50 to 400 hz.

电源消耗: Zui大3 va

输出信号: 4-20 ma dc into 900 ohms max.

零点和量程调整:通过面板菜单.

响应时间: 250 ms (阻尼设定到1).

显示: 0.4??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771高led指示器4位lcd背光显示 ，用于设定值和警示状态

电气连接: 15芯高密度插头（航空插头）. 包含10个导体的18??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771 (46 cm)电缆. 可选4′和10′电缆 .

过程连接: 1/8??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771 外螺纹npt.侧面或者背面连接.

安装方向:垂直安装.

尺寸: 5??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771 (127 mm) od x 3-1/8??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771 (79.38 mm).

重量: 1.75 lbs. (794 g).

认证: ce.

开关参数：

卡关类型: 2个单刀双掷继电器.

额定功率: 1 amp @ 30 vac/vdc.

设定点调整: 通过面板上的按键调整.

附件：

a-298, 适合面板安装的平直的铝支架

a-301, 静压取压头用于1/4??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771金属管线连接

a-302, 静压取压头用于3/16??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771和 1/8??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771直径塑料和橡胶管

a-302f-a, 带安装法兰的303不锈钢静压取压头，用于3/16??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771直径橡胶或塑料管，4??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771插入深度，包含安装螺丝。

a-320-b, 仪表外壳

a-370, 齐平安装支架，然后安装支架进行表面安装，灰色覆膜钢材。

a-489, 4??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77770??1??71??1??771??1??71??1??7771??1??71??1??771??1??71??1??77771 带法兰直式静压取压头    

选项：

需要nist溯源证书的,添加 -nist 在型号后面.例如 dh3-004-nist.

需要工厂检测证书,在型号后面加 -fc.例如 dh3-004-fc. 

选型表

 *速度和流量体积不适合双向量程单位和dh3-009以及dh3-010型号.