Transformer Oil Dissolved Gas Analyzer

I. Introduction

The Transformer oil dissolved gas analyzer is suitable for the determination of the dissolved gas content in the insulating oil of the power system. The total analysis of the dissolved gas content in the insulating oil can be completed by one injection, and the minimum detection concentration of acetylene is 0.1ppm.The instrument is equipped with large screen LCD display interface, menu type English operation, intuitive display and convenient operation.The instrument adopts double column parallel shunt system, equipped with thermal conductivity detector, double hydrogen flame detector and nickel catalyst converter, which can complete the analysis of H2, CO,CO2,CH4, C2H2, C2H4, C2H6,O2, C3H8, N2 in the transformer oil

II. Main function and configuration

III.Feature

HM-GC20 Host Feature

★Adopt advanced Gigabit / Gigabit Ethernet communication interface, built-in IP protocol stack, enables the instrument to achieve long-distance data transmission; convenient laboratory setup, simplify laboratory configuration, convenient analysis data management;

★The instrument internal design of 3 independent connection IP addresses, can be connected to the working computer (laboratory site), in charge of the computer (such as quality inspection department, production department, etc.), and senior management computer (such as the Environmental Protection Bureau, technical supervision Bureau, etc.), can monitor the operation of the instrument, and analyze the data results in real time when needed;

★The special workstation equipped with the instrument can support multiple chromatograph access at the same time, realize data processing and instrument reverse control, simplify document management;★The instrument can be connected to the manufacturer through the Internet to realize remote diagnosis, remote update, etc. (user Settings);

★The instrument is equipped with an 8-inch color LCD touch screen, support hot plug, can be used as a handheld controller；

★The instrument works in parallel to make it more stable and reliable, with various optional high-performance detectors, such as FID, TCD, ECD, FPD and NPD, to meet the analysis requirements of complex samples.

★The instrument adopts the modular structure design, and the later maintenance is simple and convenient.★The new microcomputer temperature control system, high temperature control accuracy, superior reliability and anti-interference performance; with eight completely independent temperature control output, can achieve 20 order program heating, with column box automatic rear door opening system, near room temperature control ability is improved, liter / cooling speed is faster;

★The instrument configuration of advanced electronic flow control unit (EFC), electronic pressure control unit (EPC) to realize the digital control of the gas path, greatly improve the stability of the instrument and the reproducibility of the analysis results;

★The chromatograph has a low-noise, high-resolution 24-bit AD circuit, and has a baseline storage, baseline deduction function.

★The standard workstation is suitable for WinXP, Win2000, Win7, Win8, Win10 and other operating systems.★The chromatograph microcomputer system with fully independent intellectual property rights has the standard protocol of MODBUS / TCP, and can connect with the DCS system.

Host Technical ：

●Operation display: a 5.7-inch color LCD touch screen

●Temperature control area: 8 channels

●Temperature control range: 4℃ ~450℃ above room temperature, increment: 1℃, precision: ± 0.1℃

●Program heating order: 20

●Range lift rate: 0.1~60℃ / min

●Gas path control: full electronic pressure (EPC), electronic flow rate (EFC) control

●Range: 0~100Psi (pressure); 0 ~ 1000 mL/min (flow)

●Resolution: 0.01Psi (pressure); 0.01 mL/min (flow)

●External event: 8 channels; auxiliary control output 2 channels

●Sampler type: filling column inlet sample, capillary sample inlet sample, six-way valve gas inlet sample, automatic sample inlet device

●Number of detectors: 3 (maximum); the FID, TCD, ECD, FPD, and NPD are optional

●Start the incoming sample: manual, automatically optional

●Communication Interface: Ethernet: IEEE802.3

Generators technical

Hydrogen flame ionization detector （FID）

●Detection limit： ≤1Pg

●Baseline noise： ≤1PA

●Baseline drift： ≤1PA/30min

●Linearity： ≥106

Thermal conductivity detector（TCD）

●Sensitivity： S≥6000mV•ml/mg(n-hexadecane / isooctane)

●Baseline noise： ≤20μV

●Baseline drift： ≤30μV/30min

●Linearity： ≥104

Electron capture detector (ECD)

●Detection limits： ≤1×10-13g/ml（Propyl hexa-hexa-isooctane solution）

●Baseline noise： ≤0.03mV

●Baseline drift： ≤0.2mV/30min

●Linearity：103

●radioactive source ：63Ni

flame photometric detector (FPD)

●Detection limits： (S)≤5×10-11g/s 、

(P)≤1×10-12g/s；Methyl parathion - absolute ethanol solution）

●baseline noise： ≤3×10-13A

● baseline drift ： ≤2×10-12A/30min

● linearity range： to sulphur≥102、to phosphorus≥103

Backcontrol chromatography workstation：

The HM-GC-20 gas chromatography, different from a general gas chromatograph, requires a 10 / 100M adaptive network environment (Internet access services when remote data transmission is needed over the Internet) and a computer already equipped with English Windows2000, XP, win7, win8 operating systems.

Below is the working interface.

Technical indicator ：

───────────────────────

Items Reserved time Gas potency peak area

───────────────────────

1 0.455 H2 100 36392

2 2.040 CO 70 1529926

3 12.922 CO2 300 8835319

4 17.572 CH4 10 213463

5 19.316 C2H6 10 354775

6 19.823 C2H4 10 402530

7 20.435 C2H2 5 192036

───────────────────────

Total hydrocarbon concentration ：35

Three-ratio coding：100