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10秒装修报价 装修要花多少钱?获得精准报价,省钱30%
168211
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数字压力开关 只有输出,没有接受输入的可能。 可以设置上下限,请将模式更改为 上下限比较模式, 默认的是迟滞模式,只有一个参考值和一个迟滞H可以设置
产品作用: 压力开关用于测量流经管道的液体(水及氟化处理的制冷剂)或空气的压力状态,其典型应用是显示压力与控制压力。 ●机械寿命≥10万次(参考值JC系列≥40万次) ●设定值调整:当设定值精度要求不高时,可根据控制器标度尺和系统中的压力表进行调试,当设定值要求较高时,请用专用压力校验仪和精密压力表进行调试。 压力开关内部安装有一个高灵敏度的单刀双掷接近开关。开关可设定二个切换值,通常称为上限切换值和下限切换值。 具体调试方法: 1. 压力开关顶部的右侧调节螺丝是直接调节上限切换值; 2. 压力开关顶部的左侧调节螺丝是调节开关压差; 3. 它们的关系是:上限切换值-开关压差
下限切换值 即:上限切换值可以直接在标尺上调节下限切换值要通过1~3操作来调节 *例如:(高压保护器的用法) 要求被控介质的压力保持在0.5~0.8Mpa之间。 1. 选用设定值范围在0.1~1.0Mpa的压力控制器(JC-210,HNS-210) 2. 旋动顶部右边的压力调节螺丝,使指针指示在标度尺的0.8Mpa(8kg或8bar)处,此值为上限切换值。 3. 旋动顶部左边的压力调节螺丝,使指针指示在标度尺的0.3Mpa, 下限切换值
上限切换值-开关压差
0.8-0.3
0.5,此值为下限切换值。 4. 将控制器的接线端子接入被控的电气回路。 请注意:①为公共接线。③为常开端输出。⑤为常闭端输出。 高压保护,请连接① ⑤ ,在正常升压时,①-⑤接通(①-③不通)。压力升到设定上限时即0.8Mpa处,①-⑤不通(①-③接通)。压力下降时,此时①-③接通,压力下降到下限设定点即0.3Mpa处时。又切换为①-⑤接通(①-③不通)。降压停止,压力回升,则自动循环。 5. 接通电源,让被控介质(水、气)压力上升。请注意观察调正,使压力开关的设定值与压力表指示一致,(如压力升至上限设定时,开关尚未动作,即旋动压力调节螺丝,微调到切换动作,并再次重复验证一次)并作下限验证,过程同上。(反复验证几次)用红漆固定压力开关铁壳顶部的压力调节螺丝和压差调节螺丝。 *例如:(低压保护器的用法) 用户的正常水压为0.25Mpa要求当水压低于0.1Mpa,压力开关要关闭水泵。