一般壓力表適用于測(cè)量無爆炸危險(xiǎn)、不結(jié)晶、不凝固及對(duì)銅及銅合金不起腐蝕作用的液體、蒸汽和氣
體等介質(zhì)的壓力。
精確度等級(jí)：2.5。
測(cè)量范圍：0-0.1~0-60MPa,-0.1-0,-0.1-2.4MPa。
一般壓力表屬于就地指示型壓力表，就地顯示壓力的大小，不帶遠(yuǎn)程傳送顯示、調(diào)節(jié)功能。在工業(yè)過
程控制與技術(shù)測(cè)量過程中，由于一般壓力表的彈性敏感元件具有很高的機(jī)械強(qiáng)度以及生產(chǎn)方便、安裝簡單
讀數(shù)方便等特性，使得一般壓力表得到越來越廣泛的應(yīng)用。
工作原理：
壓力表通過表內(nèi)的敏感元件--波登管的彈性形變，經(jīng)由表內(nèi)機(jī)芯的轉(zhuǎn)換機(jī)構(gòu)將波登管的彈性形變轉(zhuǎn)
換為旋轉(zhuǎn)運(yùn)動(dòng)，引起指針偏轉(zhuǎn)來顯示壓力。
波登管分為C型管、盤簧管、螺旋管等型式。一般采用冷作硬化型材料（常用材料是銅合金），在退
火狀態(tài)下具有很高的可塑性，經(jīng)冷作加工硬化及定性處理后獲得很高的彈性和強(qiáng)度。
C型波登管敏感元件截面顯橢圓形，測(cè)量介質(zhì)的壓力作用在波登管的內(nèi)側(cè)，這樣波登管橢圓截面會(huì)趨
于圓形截面。由于波登管微小變形，形成一定的環(huán)應(yīng)力。此環(huán)應(yīng)力會(huì)使波登管向外延伸。由于彈性波登管
頭部沒有固定，其就會(huì)產(chǎn)生小小變形。
技術(shù)參數(shù)：
1）表盤直徑（mm）：￠50；
2）精度等級(jí)（%）：2.5
3)測(cè)量范圍(Mpa):0~0.1、0~0.16、0~0.25、0~0.4、0~0.6、0~1、0~1.6、0~2.5、0~4、0~6、
0~10、0~16、0~25、0~40、0~60；-0.1~0、-0.1~0.06、-0.1~0.15、-0.1~0.3、-0.1~0.5、-0.1~0.9、
-0.1~1.5、-0.1~2.4
4）接口尺寸：G1/4、M14×1.5其他特殊螺紋均可定制。
5)參比工作條件
在下列條件下，儀表的基本誤差、回差、輕敲位移及指針偏轉(zhuǎn)的平穩(wěn)性應(yīng)符合本標(biāo)準(zhǔn)有關(guān)的規(guī)定。
a)環(huán)境溫度為：20℃±5℃;
b)儀表處于正常工作位置;
c)負(fù)荷變化均勻;
注：未指明時(shí)，正常工作位置系指垂直安裝；
5)溫度影響：不大于0.4%/10℃(使用溫度偏離20±5℃);
6)執(zhí)行標(biāo)準(zhǔn)：GB/T1226-2017。
安裝方式:
1)徑向直接安裝
2)徑向帶后邊
3)軸向直接安裝
4)軸向帶前邊
使用注意事項(xiàng)：
1)工作壓力使用全量程的1/3～2/3為宜，使用范圍不得超過滿刻度的3/4。
2)檢定周期一般不超過半年,測(cè)壓部位介質(zhì)波動(dòng)大，使用頻繁，準(zhǔn)確度要求較高，以及對(duì)安全因素要求
較嚴(yán)的，可按具體情況將檢定周期適當(dāng)縮短。
3)工作環(huán)境應(yīng)無腐蝕性氣體。
Product application:
General pressure gauges are suitable for measuring the pressure of liquids, vapors, and gases that are non explosive, non crystalline, non solidifying, and do not corrode copper and copper alloys.
Accuracy level: 2 5.
Measurement range: 0-0.1~0-60MPa, -0.1-0, -0.1-2.4MPa.
Generally, pressure gauges belong to local indication type pressure gauges, which display the magnitude of pressure locally and do not have remote transmission display or adjustment functions. In the process of industrial process control and technical measurement, due to the high mechanical strength, easy production, simple installation, and convenient reading of the elastic sensitive components of general pressure gauges, they have been increasingly widely used.
working principle:
The pressure gauge converts the elastic deformation of the Bourdon tube, a sensitive element inside the gauge, into rotational motion through the conversion mechanism of the movement inside the gauge, causing the pointer to deflect to display pressure.
Bourdon tubes are divided into C-shaped tubes, reed tubes, spiral tubes, and other types. Generally, cold work hardening materials (commonly copper alloys) are used, which have high plasticity in the annealed state. After cold work hardening and qualitative treatment, high elasticity and strength are obtained.
The cross-section of the C-type Bourdon tube sensitive element appears elliptical, and the pressure of the measuring medium acts on the inner side of the Bourdon tube, causing the elliptical cross-section of the Bourdon tube to tend towards a circular cross-section. Due to the slight deformation of the Boden tube, a certain amount of ring stress is formed. This ring stress will cause the Bourdon tube to extend outward. Due to the lack of fixation at the head of the elastic Boden tube, it will undergo slight deformation.
Technical parameters:
1) Dial diameter (mm): ￠ 50;
2) Accuracy level (%): 2.5
3) Measurement range (Mpa): 0~0.1, 0~0.16, 0~0.25, 0~0.4, 0~0.6, 0~1, 0~1.6, 0~2.5, 0~4, 0~6, 0~10, 0~16, 0~25, 0~40, 0~60- 0.1~0, -0.1~0.06, -0.1~0.15, -0.1~0.3, -0.1~0.5, -0.1~0.9, -0.1~1.5, -0.1~2.4
4) Interface size: G1/4, M14 × 1.5. Other special threads can be customized.
5) Reference working conditions
Under the following conditions, the basic error, backlash, tap displacement, and pointer deflection stability of the instrument shall comply with the relevant provisions of this standard.
a) The ambient temperature is 20 ℃± 5 ℃;
b) The instrument is in its normal working position;
c) The load changes uniformly.
Note: When not specified, the normal working position refers to vertical installation;
5) Temperature impact: not greater than 0.4%/10 ℃ (deviation from operating temperature of 20 ± 5 ℃);
6) Execution standard: GB/T1226-2017.
Installation method:
1) Radial direct installation
2) Behind the radial belt
3) Axial direct installation
4) Axial belt front
Precautions for use:
1) It is advisable to use 1/3 to 2/3 of the full range for work pressure, and the maximum range of use should not exceed 3/4 of the full scale.
2) The calibration cycle generally does not exceed six months. For pressure measuring parts with large fluctuations in the medium, frequent use, high accuracy requirements, and strict safety factors, the calibration cycle can be appropriately shortened according to specific circumstances.
3) The working environment should be free of corrosive gases.
