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关于压力表的精度等级的那些事
作者:汉派瑞 | 关键词:关于,压力,压力表,精度,等级,那些,事关 | 添加日期:2020年04月02日 | 浏览次数:

关于压力表的精度等级的那些事

1压力表的工作原理working principle of pressure gauge

压力表通过表内的敏感元件(波登管、膜盒、波纹管)的弹性形变,再由表内机芯的转换机构将压力形变传导至指针,引起指针转动来显示压力。

压力表按其测量精确度:可分为精密压力表、一般压力表。精密压力表的测量精确度等级分别为0.1、0.16、0.25、0.4级0.05级;一般压力表的测量精确度等级分别为1.0、1.6、2.5、4.0级。

The pressure gauge shows the pressure through the elastic deformation of the sensitive elements (bourdon tube, diaphragm box, bellows) in the gauge, and then the pressure deformation is transmitted to the pointer by the conversion mechanism of the movement in the gauge, causing the pointer to rotate.

Pressure gauges according to its measurement accuracy: can be divided into precision pressure gauges, general pressure gauges.The measuring accuracy of precision pressure gauge is 0.1, 0.16, 0.25, 0.4 and 0.05 respectively.The measuring accuracy of general pressure gauge is 1.0, 1.6, 2.5, 4.0.

2.压力表的量程如何选择?

How to choose the range of the pressure gauge?

为了保证压力表弹性元件能在弹性变形的安全范围内可靠地工作,压力表量程的选择不仅要根据被测压力的大小,而且还应考虑被测压力变化的速度,其量程需留有足够的余地。使用压力表测量稳定压力时,最大工作压力不应超过量程的2/3;

使用压力表测量脉动压力,最大工作压力不应超过量程的1/2;

In order to ensure that the elastic element of the pressure gauge can work reliably within the safe range of elastic deformation, the range of the pressure gauge should be selected not only according to the size of the pressure being measured, but also considering the rate of change of the pressure being measured.When measuring stable pressure with a pressure gauge, the maximum working pressure should not exceed 2/3 of the range;

Use a pressure gauge to measure the pulsating pressure. The maximum working pressure should not exceed 1/2 of the range.

3.压力表精度等级是什么意思?What do you mean by the precision rating of the pressure gauge?

指示值与真实值接近的准确程度。它等于最大基本误差绝对值与测量上限比值的百分数,是依据校验中所产生误差的大小来决定的。

压力表的精度等级标在什么地方?

一般标注在表盘上,表盘的空白区域有限,因此习惯上去掉%符号,只将数值填写到一个圆圈内

The degree of accuracy to which the indicated value approximates the true value.It is equal to the percentage of the ratio of the absolute value of the maximum fundamental error to the upper limit of the measurement, which is determined by the magnitude of the error generated in the calibration.

Where is the accuracy rating of the pressure gauge?

Generally marked on the dial, dial space is limited, so it is customary to remove the % symbol, will only fill in the value of a circle

4.我国压力表规定的精度等级有哪些?

What are the accuracy levels of our pressure gauges?

中国一般工业用压力表共分为4个准确度等级,符合JJG52-1999 《弹簧管式一般压力表、压力真空表和真空表》检定规程对压力表拟定的允许误差。这 4 个准确度等级是 :1.0 级、 1.6 级、 2.5 级、 4 级。允许误差 (按测量上限的百分数计算) 分别为 ±1%、±1.6%、±2.5%、±4%。

The general industrial pressure gauges in China are divided into 4 accuracy classes, which are in accordance with the allowable errors of the calibration regulations of "spring-tube general pressure gauges, pressure vacuum gauges and vacuum gauges" (jjg52-1999).The four levels of accuracy are: level 1.0, level 1.6, level 2.5, and level 4.The allowable errors (calculated as a percentage of the upper limit of measurement) are ±1%, ±1.6%, ±2.5% and ±4%, respectively.


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