Supervisory switch is preset and tested in accordance with all applicable agency requirements at the factory. No adjustment is possible once the valve is assembled.
监控开关都是按照所有相关管理机关的要求在工厂进行预置和测试。一旦阀门装配后，就不可能进行调整。
The preset can be done by two calibrated dials, a coarse adjustment calibrated dial and a fine adjustment calibrated dial.
选择的预设定值可通过两部分刻度盘来完成，即粗调刻度盘与精调刻度盘。
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