Oil and Gas Equipment/Laboratory Gas Chromatograph
GC-7890 Gas Chromatograph is a universal, multi-purpose, high-performance chromatographic analysis equipment. The instrument is equipped with dual gas-line analysis system, can be configured TCD, FID, ECD, FPD, NPD five detectors; can be operated on constant temperature or 7-step program heating; can be installed packed column or capillary column; can be used for stigma injection or rapid vaporization injection analysis; can be configured thermal analyzer, headspace sampler, automatic liquid sampler and other different injection device,to form different performance instruments to meet different users, different objects, different application place.
The instrument is controlled by computer, operated by keyboard, displayed by Chinese/English switchable LCD screen, with the advantages of high electronic circuit integration, good reliability, simple operation, long-term operation.
The oven is equipped with a rear door automatic cooling system. Each heating zone (the incubator incubator, capillary injector incubator, detector incubator, auxiliary incubator, oven thermostat) is separated from each other by a heat insulating material, so that the heat conduction between the heating zones is minimized and the temperature of each heating zone can be independently controlled.
Injector incubator can accommodate two packed columns and one capillary column at the same time. The gas flow and pressure control system is installed inside the instrument gas-line box. The injection system installed at the top of the instrument requires vertical injection.
The signal output of the instrument can be connected to a peripheral drawing device such as a recorder, an integrator, and a computer.
Temperature control index
Oven temperature:
Room temperature plus 6 ºC ~ 370 ºC; (in increments of 1 ºC),
(set effectively parameter up to 399 ºC, allowing using but not to guarantee the technical index)
Temperature fluctuation: no more than ± 0.1 ºC; (ambient temperature change 10 ºC or power supply voltage change 10%).
Temperature gradient: ± 1% (temperature range 100 ºC ~ 350 ºC).
Program heating step: 7 step.
Heating rate: 0 ~ 40 ºC / min (set in increments of 0.1 ºC).
Cooling rate: not more than 3 min when oven cool from 200 ºC to 100 ºC.
Time setting: 6000 (min).
Detector temperature:
Room temperature plus 20 ºC ~ 350 ºC (index parameters).
(Set parameters: room temperature plus 6 ºC ~ 399 ºC effective, allowing using but not to guarantee the technical index ).
Temperature control accuracy: not more than ± 0.1 ºC.
The remaining heating zone temperature:
Room temperature plus 20 ºC ~ 350 ºC (index parameters).
(Set parameters: up to 399 ºC effective, allowing using but not to guarantee the technical index ).
Temperature control accuracy: not more than ± 0.2
Features
1. Large-screen LCD display; rich and intuitive displaying content; convenient to set parameters.
2. Unique microcomputer automatic ignition device.
3. Stable and reliable digital zero setting to avoid baseline instability caused by the zero setting of potentiometer.
4. Have analysis acquisition automatic start function to seriously guarantee the synchronization of analysis and acquisition.
5. Sample injector adopts ration card to guarantee accurate sample injection and good repeatability.
6. Intelligent back pullout automatic cooling system with frequency conversion function; with fast cooling speed; achieve real near room temperature operation.
7. Column adopts unique tracking temperature rising to avoid detector contamination caused by rapid heating of column chamber .
8. With gas stopping/leaking protection and prompts functions; maximize the protection for TCD tungsten and column from damage.
9. Temperature control adopts Multichannel Integration Solid-State Relay to make temperature control stable and reliable.
10. Fault self-diagnosis function. At any time to show failure cause and alarm indication.
11. Adopt microcomputer control, keyboard setting, LCD display, with memory function.
12. High performance detector and methanator. The detection capability completely meet the Electric Power Ministry's determination of gas component content in transformer oil.
13. Adopt one injection, second diffluence column with quick analysis speed and good repeatability.
14. Double hydrogen flame design to make low content hydrocarbons and high content CO, CO2 separately detected to avoid mutual interference.
15. Adopt new type column packing material, double column temperature flow to make the C2H2 detection time quicker, sensitivity higher and analysis period shorter.
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