The visible scope of the water gauge should not surpass the highest and the lowest safe water line. 水位表的可见范围应大于最高、最低安全水位。
With a water gauge made up by two or two more glass boards or mica pieces, to indicate the water line. 用两个及两个以上玻璃板或云母片组成一组的水位表,能连续显示水位;
Water line demarcation test should be carried out when starting up and adjusting the subcritical drum boiler, to certify the zero benchmark of the local water gauge. 亚临界压力的汽包锅炉在启动调试时应进行水位标定试验,以确定就地水位表的基准零位。
The setting up of water gauge used to observe water level had been and became prevalent, with technical great improvement during the Song Dynasty. 我国宋代时期普遍设置用以观测水位的水尺,技术水平较前大为提高。
Differential pressure remote water gauge should have pressure supplement function to ensure an actual indication of water line in the bubbles under all kinds of working circumstances. 差压式远传水位表应具有压力补偿功能,以保证各种工况下都能显示汽包中真实水位的变化。