Jiangsu Runyi teach basic knowledge to customers that should be paid attention to in the purchase and use of pressure gauges .
First,The consumer purchasing pressure gauges that should be paid attention to basic knowledge:
1, The following points should be made clear in a general gauge purchasing and ordering:
a. meter Name: To clear the general pressure gauge, oxygen pressure gauge, electric contact pressure gauge, ammonia pressure gauge;
b.Instrument Type: different manufacturers have different models, but explicitly written in the contract;
c .meter diameter size: Φ40, Φ60, Φ100, Φ150, Φ200, Φ250.
d. installation: radial, axial, with front belt behind.
e .measuring range: vacuum table --- 0.1MPa
Pressure gauge - measuring caps
The pressure vacuum - measuring range
f. Accuracy class: 1.0; 1.6; 2.5; 4.0
In addition to the above points should be clear in the procurement and ordering of special gauge, depending on the pressure gauge should be clear the following points:
A.The instrumentation Name: diaphragm pressure gauge, anti-corrosion pressure gauge, pressure gauge, diaphragm pressure gauge.
B. Diaphragm pressure gauge:
a. Depending on the purpose, clear spring tube, fill fluid (silicone oil, glycerine, cooking oil, fluorine oil)
b .Based on measured media corrosion, diaphragm material (such as SUS316, tantalum sheet, titanium sheet, Monel, Hastelloy, coating, etc.) should be clearly.
c .Case flange connection flanges implementation of standards, size, material should be clearly.
C .Anti-seismic pressure gauge should be clearly the case within the damping fluid (silicone oil, glycerine, etc.)
D. Anti-corrosion pressure gauge should be based on the measured medium corrosive or corrosive working environment, clear joints, spring tube and case material.
Second,The consumer using pressure gauges that should be paid attention to basic knowledge:
⑴ Instrument must be vertical: 17mm wrench to tighten the installation should be, should not twist the case; the transportation should avoid collision.
⑵ Instrument using appropriate ambient temperature -25 ~ 55 ℃.
⑶ Work environment vibration frequency <25HZ, amplitude is not greater than 1 mm.
⑷ Using the ambient temperature is too high, the instrument indicated value back to zero or showing the value of tolerance, the case upper seal
The rubber plug is cut open, so that the instrument is communicated with the atmosphere. ⑸ instrumentation used, should be in the range of the upper limit of 1/3 to 2/3.
⑹ in measuring corrosive media, the the possible crystallization medium, the viscosity of the media should be added to the isolation device.
⑺ instrument should always check (at least once every three months), if the failure should be promptly repaired.
⑻ meter factory on the date six months under normal storage conditions of use by the company responsible for the repair or replacement due to poor manufacturing quality failure or damage.
⑼The instrument measuring corrosive media required ordering please indicate the required conditions.