DMC-1770
DMC-1770
DMC-1770
压力仪表处于工作位置,在未加压力或升压前和降压后,其指针零值误差应符合下列要求:
1、有零值限止钉的压力仪表,其指针应紧靠在限止钉上,“缩格”不得过大允许基本误差的值。
2、无零值限止钉的压力仪表,其指针须在零值分度线宽度范围内,零值分度线宽度不得过大允许基本误差值的两倍。
压力仪表的外观检查:
1、检查压力仪表的各种部件。各部件应装配牢固,没有影响计量性能的锈蚀、裂纹、孔洞等。
2、检查压力仪表的表盘分度数值及符号,表盘分度数值及符号应完整清晰;分度标尺应均匀分布,所包的中心角为270度,标有数字的分度线宽度不过1.2毫米。
3、压力仪表的指针检查,指针应伸入所有分度线内,且指针指示端宽度应不大于小分度间隔的1/5。指针与分度盘平面的距离在1~3毫米范围内。
4、检查压力仪表的封印装置,封印装置应完好,在此情况下,应触及不到仪表内部机件。
◆ 企业名称:厦门泰尼电气有限公司
◆ 主营业务:DCS,PLC
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◆ QQ:2917675397
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