3.1 Unit-by-unit temperature compensation test
During the production process, the temperature compensation test is carried out on the products in progress unit by unit to check the matching of the two spring tubes; each pair of matched two spring tubes must be subjected to the temperature compensation test, to ensure that the compensation accuracy reaches level 1.0, with an error of ≤±0.010MPa.
3.2 Overpressure test and fatigue test
Overpressure test is used to check the strength of welding (test pressure 1.25MPa); fatigue test is used to eliminate the welding and molding of spring tubes and welding over the key processes. /p>
The overpressure test is used to check the strength of the weld (test pressure of 1.25MPa); fatigue test is used to eliminate the spring tube molding and welding over into the stress generated; to ensure the reliability and stability of the density controller.
3.3 High-frequency vibration
Through high-frequency vibration, to further eliminate the spring tube stress.
3.4 Selection of high-quality spring tube
Through the test selection of good stability of the material for the CuSn8 "C" type spring tube, from the source to ensure the stability and reliability of the detection element and temperature compensation components.
3.5 Selection of Au-plated electrical contacts
In order to ensure that the SF6 density controller can reliably send out alarms, blocking signals, not due to the oxidation of the electrical contacts lead to high contact resistance, so that the alarm, blocking signals can not be sent, the selection of Au-plated electrical contacts, Au has a good electrical conductivity and chemical stability in order to ensure that the reliability of its electrical contact.
3.6 Laser welding process
The use of laser welding machine, greatly improving the stability and reliability of the mechanical parts connected to the electrical contact is fixed more secure, the set value is not due to vibration and deviation.
3.7 Vibration and shock
Through vibration and shock, it fully exposes various defects such as looseness in mechanical assembly, etc., and ensures the reliability of the factory products.