Gas Chromatograph Series Common Fault Classification
As gas chromatography analysis technology is widely used in more and more fields, gas chromatography has become a routine analytical device in component analysis. The correct use, maintenance and troubleshooting of the instrument has become an important issue for the majority of users.
Today's gas chromatographs are high-precision and valuable equipment that integrates light, machine, electricity and computer. It is different from ordinary electronic equipment. Some problems and failures during use are inevitable. However, due to the user's understanding of the structure of the instrument and the limitations of the experience of using it, the faults and problems that arise are often overwhelmed and cannot be started. In view of the above new situation, it is necessary to provide users with a set of easy-to-understand fault analysis and judgment and routine maintenance guidance materials. Guide the user to check, analyze, and judge according to the phenomenon, gradually narrow the scope according to the phenomenon, and finally find the fault point.
Classification of instrument faults:
1. According to the cause of the instrument failure, it can be divided into:
(1) Failure caused by improper installation, operation, and maintenance of the user;
(2) Instrument failure caused by long-term use, wear and aging of the components on the instrument, exceeding the service life;
(3) The factory quality (assembly quality, component quality) of the instrument itself does not meet the instrument failure caused by the technical process standards of the national industry appraisal.
2, according to the instrument's fault procedures can be divided into:
(1) All functions of the instrument are invalid;
(2) Some functions of the instrument are invalid;
(3) causing damage to components on the instrument;
(4) does not cause damage to components on the instrument;
3. According to the location of the instrument fault distribution, it can be divided into:
(1) Failure of the gas path, valve body and mechanical part;
(2) a fault on the detector component;
(3) Failure of the host electrical appliance and functional electronic components.
4. According to the type of phenomenon of instrument failure, it can be divided into:
(1) Gas path failure (leakage, blockage);
(2) Startup failure (cannot start, protect);
(3) Temperature control failure (temperature display is abnormal, no heating, heating out of control);
(4) Abnormal spectrum faults (noise, drift, strange peaks);
(5) Detector, amplifier zeroing fault.
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