RoHS 2.0 测试设备

After years of research and exploration,LISUN officially launches the new RoHS2.0

Pyrolysis Ph tha lates Detector – EDX-4. Which is developed and produced in accordance with the standard “Q31/0110000048C001-2015 GC-9860 Series Gas Chromatograph. “

The working principle of EDX-4:

GC is a technique for the separation and analysis of multi-component mixtures . It primarily utilizes the differences in boiling points , polarity, and adsorption coefficients of the components in the sample to separate them within the chromatographic column , and then performs qualitative and quantitative analysis on the separated components . A gas chromatograph uses gas as the mobile phase (carrier gas) . When the sample is introduced into the injector and vaporized , it is carried into the packed column or capillary column by the carrier gas . Due to the differences in boiling points , polarity, and adsorption coefficients of the components in the sample , they are separated within the column . Then , a detector connected to the rear end of the column detects each component sequentially based on their physical and chemical properties . Finally, the gas chromatogram of each component is sent to the chromatography workstation via a local area network (or the internet) , where the chromatography workstation records and analyzes the chromatograms to produce analytical reports for each component .

This analytical method is characterized by high separation efficiency, fast analysis speed , and minimal sample consumption . Therefore , it has been widely applied in fields such as petrochemicals , biochemistry, medical health , health quarantine , environmental protection , food industry, and clinical medicine . GC has addressed issues related to quality inspection of intermediates and industrial products , scientific research , pollution detection , and production control in these areas .

The EDX-4 gas chromatograph adopts the latest high-integration industrial-grade chips , bus technology, Ethernet technology, micro-flow gas control technology, and data processing technology. It has optimized temperature control programs and gas flow control , fundamentally enhancing the reliability and maintainability of the instrument .

EDX-4 Pyrolysis Ph tha lates Detector

About

EDX-4 Pyrolytic Ph tha lates Detector Main Functions and Features:

of Equipped with a technologically advanced 10/100M auto-adaptive Ethernet communication interface and an integrated IP protocol stack , EDX-4 gas chromatograph allows for effortless long-distance data transmission via corporate intranets or the internet . This feature streamlines the establishment laboratories , simplifies the configuration of lab settings , and enhances the management of analytical data .

Equipped with three separate connection processes , which can be linked to local processing ( laboratory site) , department supervisors ( production plant managers , etc . ) , and higher authorities ( Environmental Protection Agency, etc . ) . This feature facilitates real-time monitoring of the instrument’s operation and analysis of data results by both department supervisors and higher authorities .

Equipped with the NetCh rom ™ workstation , which has the capability to support multiple chromatographs at the same time . It facilitates data processing and remote control , simplifies document management , and minimizes the laboratory investment and operational expenses for the users to the greatest extent .

Connecting via internet , allowing for remote diagnostics and software updates with the user’s permission .；

Equipped with two operating systems in both Chinese and English with easy switch .；

The temperature control zones can be custom-named by the users；

Utilizes a multi-processor parallel working method , enhancing stability and reliability. It offers a range of high-performance detectors , including FID , TCD , ECD , FPD , and NPD . The capability to install up to three detectors at once accommodates the analysis of complex samples . Also provides flexibility to purchase and install additional detectors conveniently after the initial purchase .

Modular structural design facilitates convenient maintenance and easy updates/iterations in the future.；

Sampling time is 20 minutes, with direct solid/liquid sampling for ultra-fast results;

No chemical pretreatment is required, direct solid/liquid sampling is possible;

Featuring a globally leading ceramic heating module with less than 10% degradation over

60,000 hours;

Has a 5-degree/stage programmable temperature ramp function;

Low operating costs down to 8000 yuan/year;

Capable of controlling the instrument remotely, displaying all operations, and saving operation logs;

No involvement of any chemical reagents, no environmental assessment is needed, no laboratory construction required.

Contents

Maintenance of Key Components

Injector and Replacement of Septa, Liners, O-Rings, and Graphite Ferrules – – – 09 、 10 Flame Ionization Detector ( FID) Maintenance, Nozzle Replacement – – – – – – – 10 、 11 Thermal Desorption Instrument and replacement of syringe needle, septa, liners and

O-rings – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – 12 、 13 、 14

Installation & Replacement of the Chromatography Column – – – – – – – – – – – 15 、 16

Instrument Installation

Installation Environment Requirements – – – – – – – – – – – – – – – – – – – – – – – – – – – 17 、 18 、 19

A. The RoHS P ht halates Testing Procedure

Testing Operation Procedure

Liquid Sample Preparation – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – 29 、 30

Instrument Testing Procedure

C. Standard Solution Data Processing

Construct Component Table and Calibration Curve, Standard Solution Integration

and Create New Component Table – – – – – – – – – – – – – – – – – – – – – – – – – – – 36 、 37

D. How to generate Sample Test Results

Open the Processed Standard Liquid Chromatogram, Overlay Chromatograms and

Safety Precautions EDX-4 Appearance

Front View Gas ChromatographPlease strictly adhere to the following warning signs to avoid any injury to the users and to prevent damage to the equipment.

WarningHeating Element（Injector）This sign indicates danger. Be cautious! Be vigilant!

广州金谷科仪

1. Improper operation may cause serious personal injury accidents.

Remote Rate Final Temp EDX-4热裂解邻苯检测仪2. Not used according to the User Manual, it may cause personal injury / equipment damage. Precautions

A. High Temperature Hazard:

StartPrepRunStopWhen the instrument is in operation, it should be kept away from the heat-generating components. Before proceeding maintenance or disassembly, be sure to turn off the power first and wait until the instrument has completely stopped working & the high-temperature parts have fully cooled down!

●The sampler, detector, column compartment and rear exhaust port will still be at a certain high temperature when the instrument is working or shortly after it is turned off. Avoid

contact with these parts to prevent burns. Before replacement of parts, please wait until the temperature has decreased or use protective measures!

●Be aware of the hot gases expelled when the instrument is cooling down to prevent burns!

●Do not place flammable items behind the instrument to avoid ignition.

Power广 州 金 谷 科 学 仪 器EDX-4热裂解邻苯检测仪 警告/WARNING有电危险！非专业人员禁止操作ELECTRIC SHOCKAUTHORIZED PERSON ONLYPyrolyzer Power On Button●The polyethylene gas supply lines should be kept away from the rear exhaust port to prevent the hot gases from melting the gas supply lines, causing greater danger!

警告/ WARNING	警告/ WARNING
高温表面 切勿触摸	高温表面 切勿触摸

Back View B. High Voltage Hazard:

●Do not touch plugs with wet hands to prevent electric shock , leakage, or causing a fire.

Cold Trap Gas Fitting Gas ValveCooling FanProhibit plugging / unplugging while the device is powered to avoid damaging equipment!

●Forbidden to dismantle the instrument cover when the instrument is running. The high voltage inside could cause personal injury.

●When replacing fuses or performing maintenance, please first unplug the power cord. It does not completely cut off the high voltage by turning off the power switch.

警告/WARNING非专业人员请勿打开！NON-PROFESSIONALSDO NOT OPEN清洗口清洗阀C. Gas Source Hazards:●If the power cord is worn out or damaged, it must be replaced immediately.

	危险 DANGER	危险 DANGER
		禁止带电插拔 HOT PLUGGING IS PROHIBITED

清洗口

载气出口稳流阀触发Remote●It is necessary to follow the relevant regulations for the transportation, storage, management and safe use of gas cylinders!

进样口LAN稳压阀载气Makeup氢气H2空气Air载气入口●When using hydrogen as a carrier gas o r FID fuel gas, be aware that hydrogen may flow into the column box and cause an explosion hazard. Therefore, before connecting the pipeline,

气 相 色 谱 仪TP PRO产品型号 : SN序列号 :测量对象 : 常规色谱分析组分always close the gas source. After installing the chromatographic column and connecting the sample r and detector connectors, check all connections, pipelines, and valves before opening the hydrogen gas source.

●When analyzing special samples (toxic), the exhaust should be discharged to a safe outdoor

to prevent indoor pollution or poisoning. 注 意气源进气口Air source inletElectrical/Pneumatic PortElectrical SocketPorts Power Outlet & Switch

0201

Techin ical Specification

Schematic Diagram of Electrical and Pneumatic Connections

MonitorMonitorComputerComputerPressure reducing valvePressure reducing valveOrange Gas CableOrange Gas CableBlue signal CableBlue signal CableRed Power CableRed Power CablePyrolyzerPyrolyzerHydrogen GeneratorHydrogen GeneratorAir GeneratorAir GeneratorHeating ElementHeating ElementGas ChromatographGas ChromatographNitrogen CylinderNitrogen Cylinder

Packing List

EDX-4 Pyrolysis Phtha lates Detector Packing List	EDX-4 Pyrolysis Phtha lates Detector Packing List	EDX-4 Pyrolysis Phtha lates Detector Packing List	EDX-4 Pyrolysis Phtha lates Detector Packing List	EDX-4 Pyrolysis Phtha lates Detector Packing List
Item	Products	Main Specifications and Model	QTY	Remarks
1	Gas Chromatograph	Equipped with an FID + Capillary Sampler System + Split/Custom- Designed Injection Port + a Cold Trap	1 SET	FID+Mechanical Valve Control
2	Gas Chromatograph Accessories Kit	User Manual (or electronic version if not included) Certificate of Conformity / Factory Inspection Report (1 copy) Accessories List / High-Temperature Resistant O-Ring (? 5.0*1.9, 1pc) Gas Line Hose (? 3 – 30 meters, white)/ Chromatographic Quartz Liner (? 6.3*78.5, 1pc)/Ignition Torch (1pc) Three-Way Connector 3mm (2pcs)/ Leak Detection Fluid (1 can) Crescent Wrenches (3 different sizes x 1)/Phillips Screwdriver (? 5, 1pc) Gas Line Nuts ( M8*1 ? 3.2, 20pcs)/Column Nuts ( M5* ? 1.0, 4pcs)/ Sampling Syringes(10μ l /1μ l, 1pc each) Three-Way Connectors ( M8*1 ? 3.2, 2pcs) / Soap Film Flowmeter (1pc) Pressure Regulator Outlet Connectors ( M8*1, 3pcs)/ Ethernet Cable (2 meters, 1pc)/ Graphite Gaskets (? 0.5, 10 pieces; ? 3, 10pcs)/ Chromatographic Quartz Liner (1pc)/Plugs (? 3, 5pcs)/ Injection Septa	1 SET	Packed with Gas Chromatograph
3	Workstation	NetCh rom Chromatography Workstation Software	1 SET
4	Capillary Column	Phthalate-Dedicated Chromatographic Column	1 SET
5	KINVALL EDX-4 Pyrolyzer	Featuring both thermal desorption and pyrolysis functions. Programmable temperature control Desorption temperature: 50°C to 500°C Heating rate: 50°C/min to 150°C/min	1 SET	Heating Element and Enclosure
6	KINVALL Thermal Desorption Control System	V1.0	1 SET
7	Hydrogen Generator	Flow Rate:0-320ml/min 0.4MPa	1 SET
8	Air Generator	Flow Rate:0-2000ml/min 0.4MPa	1 SET
9	Electronic Balance	Accuracy:0.1mg Weighing Range:0~120g	1 SET
10	Nitrogen Cylinder	99.999%High Purity Nitrogen, equipped with a pressure reducing valve	1 SET	user-provided
11	PC	Brand Commercial Desktop PC + Monitor + Genuine Operating System	1 SET	windows10/windows11
12	Standard Solution	Four phthalate reference standards and others	1 SET
13	Standard Refrigerator	Storage of reference material	1 SET	user-provided
14	Tool Kit	Weighing Paper 500pcs / Tweezers 1pc Sample Cutting Knife 1pc / Hexane 500ml Nitrile Gloves 1 box / Beaker 1000ml 1pc Solvent Bottles 1.5ml 10pcs / Beaker 200ml 1pc Syringe Needles 4pcs / Quartz Cotton 1g Dongle 1pc / Graphite Gasket 10 pcs Septa 10pcs / Solvent Bottles 10ml 1pc	1SET
15	Consumables Kit	Sampler Quartz Tubes 100pcs Sampler Quartz Outer Tube 1pc Sealing Film 1 bag	1SET

07

Test Procedure

1. Open belows

Nitrogen cylinder Air generator Hydrogen generator

2. Power on belows

Computer Pyrol yzer Chromatograph

yh d

3. Start software

Connected Successfull Activate“Channel 1 ” Execute the“Ph tha late” met o

4. Start thermal desorption control system

Load the test heating program

5. Waiting

Wait untill the Chem Lab software indicates“Ready”

6. Cleaning

Inject 5 µL n-hexane and click“Start ” on the thermal desorption control system

Detection Process Diagram

5 f plsContinuous testing on sets o sam e

p h l PASS &out ut t e resu ts

onten700ppm

content <700ppmCt

/

10. Formal sample analysis Sample test

9. Cleaning again

Inject 5 µL n-hexane

8. Software operate

7. Testing standards

Take 1 µL standards for testing

11. Test finish

Inject 5 µL n-hexane and run the cleaning procedure

12. Chromatograph software operate

Send the ” Shutdown” method

13. Awaiting cooling

Wait until ” Equipment Parameter Status ” : Column oven temp. < 50°C All other temp. < 100°C

14. Power off belows

Software Chromatograph Pyrolyzer

15. Turn off belows

Nitrogen cylinder Air generator Hydrogen generator

08

Maintenance of Main Components

1 . Sample Injector

The main function is to introduce the sample into the GC column in a reproducible and

consistent manner. The introduced sample should be representative ( except for special requirements), no chemical reactions should occur during the introduction process .

Injector Structure

The injector is typically installed on the top left front side of the column compartment, with its temperature and gas pathways set and controlled by the microcomputer

controller. The structural composition is shown as below.

进样口

隔垫吹扫载气

进样帽

进样隔垫

分流

分流

样品管

外壳

衬管

接检测器到检测器

柱螺母

色谱柱

Structure Schematic Diagram( Left) Structure Schematic Diagram( Right) The injector ‘s gas path

The gas path has a carrier gas entering the chamber, blowing upwards to sweep the

injection septum and then returning to be expelled through the septum purge channel; it is then divided into two paths through the sample tube: one path continues downward into the chromatographic column, and the other is blown towards the outside of the liner and expelled through the split channel. As shown in the diagram on the right above .

Replacement of the sample injector pad

Long-term and high-frequency use can cause age and leak , leading to a drop in column pressure o r uncontrol lability, poor repeatability of peak area, retention time drift, and increased baseline noise . High-quality injection needles can effectively reduce lifespan of the injector pad. Needles with smooth surface, sharp tip and no burrs recommended ( Please consult with LISUN after-sales for purchase) .

Replacement Steps:

Turn off the gas chromatograph and ensure the column compartment & the injector are at room temperature . Unscrew the injector ca p and u se tweezer s to re move the pad.

09

Maintenance of Sample Injector

Be careful not to scratch the other components . Insert the new pad by tweezers and gently press it down . Tighten the injector cap(Over-tightening can cause damage or debris of pad that could fall into the injector) .

Replacement of the liner and O-rings

Dirty samples can contaminate the liner, leading to abnormal baseline noise and ghost peaks, etc . The O-rings will lose their sealing function under high temperature &

pressure . Generally, O-rings should be replaced each time the liner is replaced ( O-rings are consumables, and liners can be re-used after ultrasonic cleaning) .

The replacement steps are as follows:

Turn off the gas chromatograph, and ensure they are at room temperature . Unscrew

the largest nut on the top, and slowly lift the entire nut assembly upward ( not to lift it too high/ move it too far to avoid bending the connected gas lines) . Use tweezers to

hold the upper end of the liner along with the O-ring and pull them out vertically. Take a new/ clean liner, place a new O-ring on the upper part of the liner, and insert them

into the injector with gently press and then tighten the nut.

Installation of the Chromatographic Column

See the following section “Installation& Replacement of the Chromatographic Column ” .

Maintenance of F ID

2 . Hydrogen Flame Ionization Detector （ FID）

FID is a mass-sensitive detector known for its high sensitivity and wide linear range . It’s relatively insensitive to changes in operating conditions, offering good stability. It’s suitable for routine

analysis of major or trace components because of its fast response . When coupled with capillary column technology, it can perform rapid analysis of trace amounts . It’s one of the most widely

used detector s in GC instruments .

The principle of F ID: The sample to be analyzed is burned in a hydrogen flame, generating an ion current. Under the influence of a polarizing electric field, positive & negative ions move

directionally to the collection electrode, thereby producing a weak electrical current signal. This signal is then amplified and processed by a microcurrent amplifier before being sent to the

chromatographic data processing system .

The combustion gas used by FID is hydrogen . Do not open the hydrogen valve when disconnected with column in case the hydrogen will enter the column box and causing an explosion .

When shutting down the instrument, close the hydrogen valve first, then the carrier gas after cooling down .

The high-sensitivity FID requires the use of high-purity carrier gas, hydrogen, and air.

To prevent contamination of the detector, do not connect the column to the detector during column aging. The bottom of the detector can be sealed with a nut.

Before powering on, check the electrical connections are correct, the gas connections are complete, and the types of gases match the requirements .

When the detector is operating, the polarization voltage is 220–250V high voltage .

Even when the instrument is turned off, there may still be high voltage on the polarization electrodes! Please take precautions to prevent electrical shock!

Discharge to ground before operating!

10

Gas Chromatograph-FID

The structure of hydrogen flame ionization detector ( FID)

FI D is located at the top front of the GC. Its base is mounted on a heat conductor, which also houses the electric heating elements and temperature measurement sensors . These

components are connected to the temperature control system to regulate the heating

temperature . The polarizing electrode is connected to the FID ‘s microcurrent amplifier ‘s

polarizing voltage output. The signal output from the collecting electrode is connected to the FID ‘s microcurrent amplifier via a low-noise cable . Hydrogen and a ir a re introduced via stainless steel tubes from the gas line control system ‘s connectors located above the GC.

ignition wire

i on line

collection bucket

nozze l

support plate

gasket

main bodynegative high voltage line

support

temperature sensor

heat conductor。 。Electronic component

lower nut

stud nut

The structure of F ID diagram

Maintenance of F ID

The nozzle in the detector needs to be cleaned or replaced regularly.

Even under normal operation, deposits can form inside the nozzle ( usually white silicon dioxide and black carbon-containing black carbon from column bleeding) . These deposits can reduce sensitivity and cause chromatographic baseline noise and peak signals . Although it is possible to clean the

nozzle, simply replacing it with a new one is often more practical and faster. If you do decide to clean the nozzle, please be careful not to damage it.

11

Gas Chromatograph-FID

When detecting different samples or changing the chromatography column, you need to replace the nozzle . For example, the nozzle used for packed columns is different from that used for

capillary columns . You must install the appropriate nozzle before changing the column .

Step s to re place the nozzle:

Turn off the GC and ensure the column oven and detector are at room temperature . Remove the

chromatography column from the column oven . Open the top cover of the GC and remove the two screws holding the collector electrode support. Slide the collector electrode support out to

separate it from the collector electrode component. Carefully lift the collector electrode

component straight up (be careful of its connecting wires, do not pull or tug forcefully) and set

it aside . Insert a socket wrench into the detector body and attach it to the nozzle, then unscrew

the nozzle counterclockwise . Use tweezers to remove the detached nozzle and nozzle gasket, and manually unscrew the nozzle tube at the bottom of the nozzle . Obtain a new or thoroughly cleaned nozzle and re install it.

( Note that the nozzle gas ket is a sealing part and must be replaced to ensure gas tightness) .。

PY-Heating Element

The PY Thermal Desorbe r is a sample pretreatment device that can seamlessly and efficiently

interface with GC or GCMS. It features an independent temperature control system and allows for direct solid/liquid sampling. Pre-de sorption or thermal de sorption can reduce sample

contamination of the GC or GCMS.

Two main parts of PY: the chassis and the heating element. The chassis houses the electrical and temperature control components, while the heating element is the main body for sample

introduction and de sorption, equipped with a sampling needle that directly fits into the GC or GCMS injection port. This setup ensure s a seamless and efficient connection, optimizing the analytical process and maintaining the integrity of the system .

injection portinjection gas inletinjection nutcleaning outletprotective tubecaseceramic heating elementline tubetemperature sensorsample tubecarrier gas inletsupport connect wireconnect to GC

The structure of the heating element

12

PY-Heating Element PY-Heating Element

Pneumatic circuit of heating element Replace the liner, O-ring and injection septum

—心 cleaning outletinjection Turn off the PY, get down the heating element from GC， wait until all parts of heating element have cooled down to room temperature .

injection nutgasketupper nut assembly O ringAfter removing the case, place the heating element flat on the desk , manually unscrew the injection nut to expose the sample septum, and use tweezers to lift and discard the

septum;Unscrew the upper nut assembly and gently move it aside

sample tube carrier gasliner tube(be careful not to pull off the 2 gas lines which connected to the upper nut assembly) . And you will see the upper O-ring seated 3-4 mm from the upper port of the liner. Use tweezers to remove it; Remove the bottom support and bottom cover assembly, then unscrew the lower nut assembly and gently move it aside (be careful not to pull off the 1 gas line which connected to the lower nut assembly) . And you will see the lower O-ring seated 3-4 mm from the lower port of the liner. Use tweezers to remove the line r and the lower O-ring

together.

connect to GC case

main bodyPneumatic circuit of heating element diagram

Replace the injection needle

1 .Turning off the gas chromatograph, wait until all parts have cooled down to room temp., then disconnectheating element as well as all the gas lines, and remove them all from the injection port;2. Unscrew the 2 screws at the top to remove the casing,Place the heating element flat, take a new or

O ringthoroughly cleaned liner, and slide a new O-ring

onto the liner about 3-4 mm away from the port

lower nut assemblyunscrew the 4 screw s on both sides to detach the support base, and unscrew the 4 screws at the bottom to remove the bottom cover and the aluminum column;3. lnvert the heating element, use the wrench1 to enterthrough the side s lot and hold it in place on the lower hex nut, keep it still, use the wrench2 to grip the hex of thecover plateend. Then, insert the other end of the liner into the heating element until it stops at the O-ring. Slide the other new O-ring onto the part of the liner that is now protruding from the heating element, again about 3-4 mm from the port end.

bottom cover assembly wrench 2Hold one end of the liner that is exposed from the top of the heating element with one hand (to

injectionneedle locking nut and turncounterclockwise to removethe injection needle (you can;use pliers to extract it), replace it with a new one .suportprevent the liner from shifting), and with the other hand, pick up the lower nut assembly and tighten it onto the bottom of the heating element. Tighten

Handle with care during replacement to avoid damaging other components!the upper nut assembly onto the top of the heating element. Place a new sample septum into the upper

wrench 1nut assembly and then screw on the injection nut. Be cautious of the injection need el! Be cautious of the injection need el!

upside down

1314

Installation& replacement of Column

Installation of capillary column

When installing or replacing a capillary column, the new capillary column is already quite neat and

does not require any additional tidying up. However, the column ends should be freshly cut to ensure they are smooth without burrs, and to remove any particulate matter from the column, the stationary phase, and the sealing gaskets . These details are very important. Therefore, the column ends should be freshly cut using the ceramic cutting wheel provided in the accessory box, by scoring at the point where you want to make the cut. It is common to attach the column nut and gasket before cutting.

Note: Wear protective eyewear to prevent potential eye injuries and skin punctures .

Due to the considerable rigidity of capillary columns, extra care should be taken when handling them, and pay attention to personal safety

FID检测器柱插入长度

分流/不分流进样时

抵到检测器端后回退一点留出约80 ~85mm(切勿穿过喷嘴)

使用分流裤管作不分流进样时

留出约20mm

留出15 mm

石墨锥垫

石墨锥垫卡套螺帽

卡套螺帽

毛细管柱

卡套螺帽

柱铭牌柱铭牌

capillary column installation diagram

Capillary columns come coiled on a metal frame from the factory. The installation of capillary columns is done by suspending this frame on the capillary holder inside the column oven of the GC. The position of the holder depends on the diameter of the metal frame . Typically, the capillary column is located in the center of the

column oven of the GC. The ends of the capillary column extend from the bottom of the frame and should be

smoothly curved towards the injector and detector interfaces without touching the walls of the column oven . The capillary column may be contaminated by the graphite ferrule when it is inserted; this can be mitigated by cutting off the top of the ferrule with a razor knife after it has been inserted into the capillary column . The cut

should be made to ensure that it i s even and smooth without any burrs (left is o k but right is NG) .

15切割端口OK 切割端口NG

Installation& replacement of Column

Column installation steps

① Take a new capillary column, keep column name plate facing you, and hang it on the holder inside the column oven of the GC.

② Insert one end of the capillary column into a fer rule nut, and then insert a 0.5 mm graphite ferrule with the tapered end facing upwards ( as shown in the figure below) .；

石墨锥垫

卡套螺帽

毛细管柱一端 石墨锥垫 卡套螺帽

毛细管柱一端

beforeafter

③ Uss ceramic cutter to cut off 30 to 40 mm from the end of the capillary column that has been fitted with a fer rule nut and a graphite ferrule . Ensure that the cut surface is even and free of burrs or rough edges . If the cut is not perfect on the first attempt, you can make additional cuts as needed.

④ After cutting, align the column with the small hole at the tail end of the injector and insert it approximately 20 mm . Then, slide the graphite ferrule and ferrule nut up and tighten them at the bottom end of the injector using a wrench.

⑤ Follow the steps ② to ④ mentioned above to handle the other end of the capillary column, and finally tighten it at the bottom end of the detector. The capillary column installation is complete .

Replace of column

① Columns can experience long-term use, aging, or damage, which may lead to abnormal peak shapes, unstable baselines, and separation that does not meet requirements . These issues can significantly

impact the analysis results or cause contamination and even damage to th e GC or GCMS system .

② When the detection method is altered, it becomes necessary to replace the chromatography column ；

③ When the separation of target components is not ideal, it is necessary to replace the chromatography column .

Changing the column follows similar steps to its installation . First, remove the column to be

replaced from the column oven of the GC by loosening the ferrule nuts at the bottom ends of the

injector and detector (this will allow the column to be taken out) . Then, follow the same steps

used for installing a chromatography column to fit the new one . If the column being replaced has been used before, pay attention to its orientation: the end that was originally connected to the

injector should be reconnected to the injector, and the end that was connected to the detector

should be reconnected to the detector port. How to distinguish which end o f a used column

connects to the injector and which end connects to the detector? Generally, this can be determined by the length of the impression left on the column by the graphite ferrule at each port:

If the distance from the port to the impression is about ②0 mm, it i s the end that connects to the injector.

If the distance from the port to the impression is about ⑧0 mm, it i s the end that connects to the detector.

of the chromatography column .16By correctly identifying and reconnecting each end, you will have completed the replacement

Instrument Installation Instrument Installation

3. Installation site space (for reference only)1. Installation of gas source

The gas source should be installed in a safe location, preferably close to the GC. It’s recommended to use stainless

Minimum installation space: 3000mm(W)*3000mm( D)*2800m ( H); Recommended workbench 2000mm(W)*700mm( D)*750mm( H) ( strong and stable enough)； At least a 500mm distance recommended between the workbench and the wall to facilitate equipment cooling, personnel installation, and subsequent maintenance .steel gas lines, and to standardize the installation of pressure regulators, ball valves, and other necessary components on the gas lines .

For other forms of gas sources ( such as gas generators, cylinder gas sources, air compressors, etc .), it’s essential to carefully check the quality of the produced gas to ensure it meets the requirements . Otherwise, it may affect the

4. Installation diagram (for reference only)analysis results or cause contamination and even damage to the GC!

Nitrogen CylinderGenerally, cylinder gas sources are used, which should be secured to prevent them from tipping over and causing accidents . Installation steps for the pressure valves are as follows:

PyrolyzerGas Chromatograph1. Remove the low-pressure outlet heads from the two oxygen pressure valves and one hydrogen pressure valve, attach the regulator connecters, and screw on the low-pressure output adjustment rods without tightening them for now;

Monitor2. Mount the pressure valves onto the cylinders, tighten the caps, and then open the high-pressure cylinder valves . The high-pressure gauge on the pressure regulator should indicate some pressure;

Workbench3. After closing the high-pressure cylinder valve, the reading on the high-pressure gauge of the pressure regulator should not drop. If it does, there is a leak that needs to be addressed before use can proceed.

For the installation and connection of the external gas lines, please refer to the ” Electrical and Gas Line Connection Schematic Diagram ” specifically.

AirHydrogen GeneratorGenerator Installation Precautions：

1. The gas outlets for the pneumatic circuit and the detector should be connected to pipes that

vent the gases outside to prevent indoor air pollution when analyzing toxic and harmful substances .

Trap2. In actual operations, pay attention to regular leakage checks . If a leak occurs, it can at best affect the normal operation of the instrument, and at worst, cause accidental incidents (for example,

Computer Casea hydrogen leak could potentially cause an explosion)

Trap3. Ajust pressure of carrier gas to GC：0.5 MPa；

4. Ajust pressure of Air to GC：0.5 MPa；

5. Grounding adviceTo ensure the safe and reliable operation of the instrument, it is crucial to have a proper groundingmethod in place . Generally, most countries and regions require the installation of a g rounding wire for electrical equipment to ensure personal safety.According to safety standards, electrical equipment must be installed with a safety conductor for grounding.The safety conductor must be connected to the conductive surface s of t he electrical equipment that operators may come into contact with, or to conductive surfaces that could become energized due to electrical accidents .Under normal operating conditions, this wire should not carry any returning alternating current.If the instrument ‘s frame is not grounded, or if the live wire accidentally comes into contact with theframe, the voltage on the frame could reach a level that poses a significant hazard. Grounding the safety wire to the chromatograph ‘s chassis can prevent the risk of electric shock. The safety grounding wire in the chromatograph is typically connected to the building ‘s conduit through an insulated groundingdevice, and in all cases, it must comply with local and national safety standards .We recommend using a noiseless grounding device . This type of grounding is also known as “insulated grounding ” because it is separate from other electrical grounding devices in the building. Whenconnecting the gas chromatograph to other instruments, using “insulated grounding ” can helpmaintain system reliability. This is because, in most cases, ordinary grounding will inevitably introduce some noise caused by poor grounding ( noise may also come from radio frequency broadcasters) .185. Ajust pressure of Hydrogen to GC：0.5 MPa； Gas line leak checking：

After the external gas lines are installed, it is imperative to conduct a leak check to prevent accidents .

Follow steps for leak checking:

Close all the carrier gas steady flow valves, hydrogen, and air needle valves on the main unit;

Place the low-pressure regulation lever of the cylinder in a relaxed state, open the cylinder ‘s high –

pressure valve, and then slowly adjust the low-pressure regulation lever until the low-pressure gauge indicates 0.5 MPa;

Close the cylinder ‘s high-pressure valve . The reading on the low-pressure gauge of the pressure regulator

should not drop. If it does, there is a leak in the external gas lines, and a careful inspection is necessary to identify and rectify the leak .

2 . The equipment should be installed in a clean indoor environment, avoiding direct sunlight, dust, noise, and gas pollution .

The indoor ambient temp. should be 5°C ~ 35°C, with a relative humidity not exceeding 85% .

Avoid violent vibrations and frequent movements, strong air currents, and corrosive substances .

The power supply should be AC 220V ± 22V with frequency of 50Hz ± 1 Hz, and grounding the electrical connection .

As the gas chromatograph is a high-power equipment, it is essential to provide an independent power interface and not share it with other devices .

If the power supply is unstable or the voltage fluctuates greatly, it is recommended to use an AC

17UPS of more than 4000W and an electronic voltage stabilizer.

RoHS P ht halates Testing Procedure Installation Environment Requirements

1 . 1 Power On and Off Sequence1. 1. 1 Turn on Nitrogen Cylinder The gas pressure is 0.4 MPa, and the gas capacity value is 8 Grounding methods:

1. Use a wire of appropriate size to connect to the building ‘s main pipeline or to the entry point of the main conduit.

2. Drive a long grounding stake into the damp soil and connect it to the entry point.

3. Connect to other reliable entry points .

Adjust gas pressure to 0.4 MPa

It is generally understood that the ground wire impedance returning to the main

Total pressure gauge to observe the gas consumptionTurn the valve handle counterclockwise to open the nitrogen supplygrounding bus bar f rom any load must be less than 11 ohms . The insulated ground wire

must be securely fastened to the device . Do not use clips to attach the ground wire to

pipes or g rounding terminals, nor use any other method that could loosen the connection . Minimize the reduction of insulation resistance at the grounding connection points as

much as possible . If installed improperly, resistance can be measured at the connection

lpoints, and the addition of resistance on the ground wire can create an unwanted potentia on the insulated grounding device . When installing the ground wire, prevent it from

accidentally contacting other ground wires, which could adversely affect insulation .

Note:When the gas capacity is below 2, it indicates that the nitrogen capacity is low, should immediately replace the gas cylinder！

1. 1.2 Turn on Hydrogen/Air Generator

① ② ③ ④ ⑤ ⑥ ⑦ Front Hydrogen Generator Back ⑧ ⑨

① Hydrogen Purifier	④ Electrolyte Water Level Line	⑦ Power Switch
② Electrolyte Storage Tank	⑤ Hydrogen Digital Flow Meter	⑧ Power Cord
③ Pressure Gauge	⑥ Electrolysis Indicator Light	⑨ Hydrogen Output Port

Note: Prepare the electrolyte solution: once every six months . In a beaker, add 500 ml of distilled water and weigh out approximately 200g of potassium hydroxide ( KOH, analytical grade) . Gradually and slowly add the KOH to the distilled water, ensuring it dissolves

completely. After the solution has cooled, pour it into the storage tank and top up with

distilled water to the maximum water level mark.

19 20

RoHS P ht halates Testing Procedure RoHS P ht halates Testing Procedure

Caution: Potassium hydroxide ( KOH) in solid form and when dissolved inliquid is highly corrosive and poses a significant risk of injury. Always wear gloves when preparing the solution and take care to prevent it from splashing into your eyes .2. Please replace the silica gel when it changes from blue to pink. After powering off theinstrument, open the exhaust port to release the gas . When the pressure is at ‘0 ‘, unscrewthe entire silica gel tube counterclockwise . Pour out the pink silica gel particles into a beaker, and dry the m in a drying oven at 120 degrees Celsius for about two hours until the silica gel turns blue again .1. 1.3 Turn on computer Ensure that the power cord of the computer are correctly

connected to the USB data cable, heating element and the gas linesof the gas chromatograph.

1. 1.4 Turn on Pyrol yz er

Ensure that the power cord of the Pyro lyze r are correctly connected to the computer, USB data cable, heating element and the gas lines of the gas chromatograph.

.

AB

① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩

Pyrol yz er SideBack

① ② ③ Front Air generator Back ④ ⑤ ⑥ ⑦① Pressure Gauge③ Power Switch⑤ Power Cord② Pressure Regulator④ Automatic Drain Pipe⑥ Air Outlets (2 sets)⑦ Filters (2 sets)Note: The power switch for the thermal de sorption system is located on the back of the chassis ( as indicated by in the above diagram) .

Before turning on the power, please ensure that the computer has been turned on first to prevent the thermal de sorption system from emitting an alarm beep.

1.1.5 Open the Gas Chromatograph ( GC)

When the GC is connected to the power supply, press the power button located at the

bottom right on the front panel inward. The power button indicator light will illuminate, turning on the gas chromatograph.

22

RoHS P ht halates Testing Procedure RoHS P ht halates Testing Procedure

1 . 2 Open Gas Chromatography Workstation Software

KINY LL 广州金谷科仪1.2.2 open”NetCh rom在线”(as below)1.2. 1 Locate the ‘ NetCh rom Online’ icon and double-click to open it.

		– Remote Rate Final Temp – O O O Start PrepRun Stop Power	– Remote Rate Final Temp – O O O Start PrepRun Stop Power
		– Remote Rate Final Temp – O O O Start PrepRun Stop Power	– Remote Rate Final Temp – O O O Start PrepRun Stop Power
		– Remote Rate Final Temp – O O O Start PrepRun Stop Power	– Remote Rate Final Temp – O O O Start PrepRun Stop Power
		– Remote Rate Final Temp – O O O Start PrepRun Stop Power	– Remote Rate Final Temp – O O O Start PrepRun Stop Power
		– Remote Rate Final Temp – O O O Start PrepRun Stop Power	– Remote Rate Final Temp – O O O Start PrepRun Stop Power
		– Remote Rate Final Temp – O O O Start PrepRun Stop Power	– Remote Rate Final Temp – O O O Start PrepRun Stop Power
		– Remote Rate Final Temp – O O O Start PrepRun Stop Power	– Remote Rate Final Temp – O O O Start PrepRun Stop Power
		– Remote Rate Final Temp – O O O Start PrepRun Stop Power	– Remote Rate Final Temp – O O O Start PrepRun Stop Power

GC Power On ButtonPressure Gauges

Notes ：Check the three pressure gauge s on the lower right side of the gas

chromatograph ( as shown in the upper right figure) . The carrier gas should be at

0.3 MPa, hydrogen at 0. 1 MPa, and air at 0. 15 MPa . If there is no pressure or you are unable to adjust it, please consul t a professional or the equipment manufacturer for assistance .

1.2.3 After a moment, on the main interface of the ‘ NetCh rom Online’ software, at the

bottom left under ‘ Device Management ‘, a green sphere icon will light up, indicating that the computer is successfully connected to th e gas chromatograph ( a gray sphere icon

indicates disconnection) . Double-click on this sphere icon, and the operating parameters of the gas chromatograph will be displayed in the functional area at the top right of the

software .

2423

RoHS P ht halates Testing Procedure

1.2.4 Check if the parameters for the chromatograph in the top right function area of the

detection software are correct: ‘Injector at 250°C ‘, ‘ Column Oven at 50°C ‘, ‘ Detector at 250°C ‘

1.2.5 Click on t he ‘ Start Temperature Control ‘ button on the far right of the parameter area, and the gas chromatograph will begin its temperature programming.

25

RoHS P ht halates Testing Procedure

1.2.6 While the program-controlled temperature increase is in progress, adjust the hydrogen valve handle located at the top rear of the gas chromatograph by turning it counterclockwise to the position marked by the red number 6 (the number 6 is red, and the number 0 is black)

1.2.7 Wait for the temperatures of the injector, column oven, and detector of the gas chromatograph to reach the set values . Once they have reached the set temperatures,

the ‘ Prepare’ sphere icon in the parameter area will be lit up, changing from gray to green .

1 . 3 FID Detector Ignition

When the automatic ignition occurs, you will hear a s light popping sound. When the

‘ Current Signal ‘ box at the top of the software’s main interface shows an increase in the signal value to 80-300pA , it indicates that the ignition is successful. After the ignition, adjust the hydrogen valve handle in the clockwise direction to reduce it by 4-5 turns,

until the signal value is approximately 20-30pA.

26

RoHS P ht halates Testing Procedure

1 .4 OpenLISUN Thermal De sorption Control System

1.4. 1 Double-click to open the software

1.4.2 click the ‘ Load ‘ button located at the top and select the required test program .

1.4.3 In the pop-up open dialog box, double-click on the ‘Test Program ‘ folder, locate the ‘Test Program . dat ‘ file, and double-click to open it to load the test program .

27

RoHS P ht halates Testing Procedure

1.4.4 After the test program has been loaded, confirm that on the main interface of the thermal desorption control system, the temperature display in the ‘ Equipment Status ‘ section is below 60°C, and the pressure display is as adjusted by the field engineer.

1.4.5 Open the main interface of the thermal desorption control system . Once the system is

running normally, minimize it temporarily. Then, return to th e gas chromatography workstation software interface to perform sample introduction related operations .

1.4.6 Set up the spectrum save folder for the current day.

28 Return to the ‘ NetCh rom Online’ main interface, click on ‘ System ‘, then ‘ Options ‘, followed by ‘ Operations ‘, and finally ‘ Save Start Directory ‘ . Create a new folder with the current date and c lic k ‘ OK ‘

RoHS P ht halates Testing Procedure

1 . 5 Testing procedure

Once all the preparatory work is completed and ready, the first step is

to conduct a cleaning test, followed by a standard sample test. After the standard sample test and subsequent cleaning, proceed with the

sample testing.

1. 5. 1 Liquid sample preparation

1. 5. 1. 1 Sample size

Cleaning test： 5 uL n-hexane

Standard solution test： 1 uL4 P standard

Sample test： 0.5-1.5 mg non-viscous sample

or 0.5-1.0 mg viscous sample

1.5. 1.2 Standard sample preparation Preparation List as below： A. n-hexane or anhydrous ethanol C. standard soliton（消耗材料） E. big quartz cotton（消耗材料） G. quartz sample tube（消耗材料） I. weighing paper（消耗材料） K. electronic balance

B. 1 pc beaker D. 1 pc micro pipette F. small quartz cotton（消耗材料） H. special sample cutter J. tweezers

29

RoHS P ht halates Testing Procedure

① First, take out the micro pipette and rinse it in n-hexane at least five times . Continue rinsing

until there are no bubbles inside the micro pipette . “

Note: The liquid used for rinsing should not be returned to its original container. Instead, it should be injected into a prepared beaker and disposed of at the end of the workday.

② After cleaning, use the pipette to ri nse with the standard sample reagent at least five times, ensuring that there are no air bubbles inside the pipette . Only then should you aspirate 1 µL of

the reagent specimen sample . Keep the micro pipette horizontal.

Keep it horizontal

Note: The liquid used for rinsing should not be returned to its original container. Instead, it should be injected into a prepared beaker and disposed of at the end of the workday.

③ a ke a quartz sample tube and use tweezers to place a small amount of quartz cotton in the middle section of the tube . Then, inject the liquid specimen obtained from ‘ Step 4.2.2.2 ‘ into

30the

RoHS P ht halates Testing Procedure

1 . 6 Testing Operation Procedure

1.6. 1 Single sample testing

① Wait for the ‘ NetCh rom Online’ workstation software main interface ‘ Prepare’ circle icon to turn green

② Place the quartz sample tube prepared in step ‘1 .5. 1.2 ‘ into the heating head. Put on the

septum for sample introduction, then cover with the sampling cap and tighten it appropriately (for the correct tightness, refer to the maintenance guide at the back of this manual— > Item 2 regarding the gas chromatograph)

样品小石英管进样隔垫→ 螺丝帽

③ Check the pressure gauge for the column head pressure on the rear top of the gas

chromatograph. Ensure that the ‘ column head pressure’ value returns to a stable number.

31

RoHS P ht halates Testing Procedure

④ On the main interface of the ‘LISUN Thermal Desorption Control System ‘ (where the set temperature is displayed as a green curve), ensure that the temperature of the heating head

does not exceed 70°C, and at the same time, confirm that the pressure value is stable .

⑤ On the main interface of the ‘LISUN Thermal Desorption Control System ‘, click ‘ Start ‘ .

32

RoHS P ht halates Testing Procedure

Prerequisite: If a single sample does not exceed the standard, continuous sampling can be carried out.After clicking ‘ Start ‘, the program begins to run, and the temperature control curve is shown in

e,the figure below. The ‘ Current Temperature’ blue curve should follow the ‘ Set Temperature’ cu rv and the fluctuation should be minimal

⑥ After the test is completed, locate the ‘ NetCh rom Offline’ workstation software, double-click to open it, and then click ‘Open’ on the main interface . Follow the save path to find the tested

33spectrum and name it with ‘(Sample Name + Sample Weight)

RoHS P ht halates Testing Procedure

1.6.2 Continuous sampling

① Instrument Preparation: Ensure the temperature of the thermal desorption control system is below 60°C; in the ‘ NetCh rom Online’ workstation software, the ‘ Prepare’ sphere icon on the

main interface should be l it u p in green .

② Testing：To repeat 1.5 process

③ When 5 consecutive samples all pass the test without exceeding the limits, a cleaning test must be performed once . If any one sample exceeds the limit, a cleaning test must be conducted and

repeated until the residue is completely clean before proceeding to the next sample .

Solid sample Sampling & Testing

2 . 1 Sample Cutting & Weighting

Principle: Sample at multiple points, with small quantities each time .

Use sample-specific knife and collect small amounts of samples from different locations .

Sample locations should not be less than five points, and the total sample mass should be within the range of 0.5 to 1.5 mg.

“When sampling sticky or soft materials, the sample size should be within the range of 0 .5 mg to 1.0 mg. “

“Always wear gloves when taking samples to prevent contamination and ensure that the experimental results are not affected. ” “Take samples directly on the weighing paper. “

:

2 . 2 First, use a calibration weight to adjust the scale . During calibration, ensure the water droplet is centered. After sampling, weigh t he sample .

34

Solid Sample Testing

2 . 3 First, weigh t he weighing paper and then press the ta re button ‘T ‘ (indicated by the red arrow in the diagram above) . Next, place the sample onto the weighing paper and weigh them together. The final displayed number will be the sample weight+weighing paper weight.

To ensure accurate weighing, please adhere to the following guidelines:

Avoid any strong air currents or drafts around the scale.

Position the sample precisely in the center of the weighing tray.

Maintain the cleanliness and orderliness of the tray.

Any deviation from these conditions could compromise the weighing

results.

2 .4 After weighing, place the sample in the middle section of the quartz sample tube and seal both ends with quartz cotton . As below:

Tip:

Use tweezers to ho ld a small amount of quartz cotton to block one end of the quartz tube first, then place the test sample inside, and finally use

tweezers to ho ld a small amount of quartz cotton to block the other end. This method helps prevent solid

samples from being blown into the instrument.

2 . 5 Testing

35To repeat 1 . 5 process

Standard Solution Data Processing

3 . 1 Construct component table and build calibration curve To open and rename the standard solution file for the current day

Note: This step must be completed after the standard solution testing is finished and before the first sample test is conducted

3 . 2 Standard solution integration

Click ‘ Delete Peak ‘ to remove all peaks; then click ‘Add Peak ‘ to integrate the peaks for DI BP, DB P, BB P, and DE HP, and finally click ‘ Save’（ as below）

3 . 3 Create a new component table

36Click on ‘ File’ and then select ‘ Edit Component Table’（ as below）

Standard Solution Data Processing

In the pop-up window, open the integrated standard solution spectrum, then click ‘Open

Component Table’, select the 4p. cal file, and choose ‘Add All Peaks ‘ . Verify that the component names ( DI BP, DB P, BB P, DE HP) are correct and the concentration is at 1000 ppm . Click ‘ Save’ to complete the standard solution processing.

37

How to generate the test report

4 . 1 Open the processed standard solution spectrum . ( as shown in the figure below)

4 . 2 Spectrum Overlay

Click on ‘ Spectrum Overlay ‘, open the folder, and over lay the sample spectrum .

4 . 3 Delect Peak

38Click on ‘ Delete Peak ‘ to remove all integrations from the sample spectrum .

How to generate the test report

4 .4 Add Peak

” Click ‘Add Peak ‘ to integrate the four peaks that overlap with the phtha late 4 P standard so lution, t hen c lic k ‘ Save’ . “。

4 . 5 Click on ‘ Quantitative Result Calculation’, then select ‘ Quantitative Component Table File’, open the 4pcal file, and confirm .

39

How to generate the test report

4 . 6 To calculate the sample content, go to ‘ Quantitative Result Calculation’ and then to ‘ Concentration Factor ‘ . Enter the sample mass and click ‘Apply Settings ‘ . As below

4 . 7 Print Report

After checking the sample content results, click ‘ Save’ and then print the re port.

40

Power off process

5 . 1 Turn off Temperature Control

In the ” NetCh rom Online ” software, on the main interface, click on “Instrument Settings ” panel located at the top right corner, and select “Turn Off Temperature Control ” . Wait until

the temperature drops below 100 degrees ( as shown in the figure below) .

5 . 2 Turn off the Hydrogen Supply

Turn the hydrogen valve handle counterclockwise to the 0 position, and the signal value should display as “0 ” ( as shown in the figure below)

5 . 3 Turn off Gas Chromatograph

When both the injector temperature and the detector temperature are below 100°C, press the power button on the front panel.

5 .4 Turn off the Pyrol yzer

41Boat-shaped power switch at the back of case

Power off process

5 . 5 Turn off the Air Generator

Power Butter at the front

5 . 6 Turn off the Hydrogen Generator

Power Butter at the front

5 . 7 Turn off the Nitrogen Cylinder

Warranty Notice

In order to better serve our valued customers , our company hereby commits that all

products and accessories provided are in good quality and meet the product ‘ s functionality and requirements . The product warranty period is one year from the date of acceptance after delivery. We will provide free software upgrades if the product hardware is still in good

condition .

Warranty Terms: After the product is delivered and put into use , if defects repeat ly occur,

we will provide analysis report and solution until the final correction . The one-year warranty period for the corrected parts will be recalculated from the date of correction .

Response Time: During the warranty period , once getting the customer ’s urgent request for warranty service , our response time will be to arrive on-site within 24-48 hours . If the defect affects normal operation , our company will promptly replace it with a spare equipment to

ensure the normal operation of the customer.

After Sales Service Info.

Customer		Phone
Address
Supplier
Product
Model		Purchase Date
Service Technician		Arranged Date

42

Maintenance and Care Fault Analysis and Troubleshooting

Item	Maintenance Checklist
Gas Chromatograph	1. Equipment Aging: With the equipment operating normally, load the “Aging ” method and perform routine aging for 4 hours. After the aging process is complete, reload the “4P” method. 2.Chromatography Injection Septum: It is recommended to regularly replace the septum, typically once a month. Excessive use of the septum can lead to debris falling into the liner. Tighten the septum nut by hand and then loosen it by 60 degrees; there should be a 1mm gap between the crescent-shaped piece above the septum nut and the nut itself. If the septum is too tight, it will produce debris prematurely; if too loose, it may lead to air leaks. 3.GC Injection Port Liner: Regularly replace the liner on a weekly basis. It can be cleaned ultrasonically and reused. Replace the liner when it becomes dirty, or if there are signs of debris, black contaminants, transparent crystalline salts, or poor sample repeatability. Secure the liner’s nut with a wrench without overtightening to avoid crushing the liner. The quartz cotton should not be packed too tightly; keep it fluffy. 4. FID Nozzle (Ignition Port): A clogged nozzle can cause abnormal peaks or ignition difficulties. The solution is to remove the nozzle, clean it with a fine wire to remove blockages. But generally, no need frequent disassembly and cleaning. 5.Used quartz tube: After removing the quartz cotton, clean the quartz tube ultrasonically with n-hexane, and repeat the ultrasonic cleaning with n-hexane six times and drying. 6.Split-Flow Trap: Replace the activated carbon every two weeks. After replacing, the activated carbon can be reused. It is installed at the split and septum purge gas outlet of the injection port and effectively adsorbs organic samples from the carrier gas, preventing sample condensation in the subsequent pipeline that could lead to blockages. Loosen the nuts at both ends with a wrench and put in fresh activated carbon. 7.Carrier Gas Trap (Oxygen, Hydrocarbon, and Moisture Removal): With a capacity of 750 cm3, the trap typically lasts for 2 years. It is used for gas purification inside the gas chromatograph. The trap is for single use and should not be reused. 8. Liner O-Ring: Replace when the gas chromatography airtightness is poor, and routinely replace it every six months.
Pyrolyzer	1. Heating Element Liner: Clean it every 2-3 days: Clean the inner wall of the liner 2-3 times by a cotton swab with n-hexane. Replace the liner every 2 weeks. The liner can be resused after ultrasonic cleaned with n- hexane. 2. Injection Needle: Replace it once a week. 3. Large Nut on Heating Element: Clean by a cotton swab with n-hexane once a week. 4. Large Nut Below Heating Element: Clean it once a week, first wipe by a cotton swab with n-hexane, then ultrasonic clean with n-hexane for 5-6 rounds. 5. Liner O-Ring: Replace when the Thermal Desorber’s airtightness is poor, and replace it every 6 months. 6. Graphite Paper: Replace when it is damaged.
Hydrogen Generator	1. Electrolyte Solution Preparation: Prepare the solution every 6 months. In a beaker, gradually add 200g potassium hydroxide(KOH, analytical grade) into 500ml distilled water in small amounts, allowing it to dissolve slowly. After complete dissolution and cooling, put the solution into the storage tank and then top up with distilled water to the Max water level. Wear gloves during preparation to prevent corrosion and take care to prevent splashing into the eyes. 2. Silica Gel Replacement: Replace when it changes from blue to pink. Turn off the equipment, then open the exhaust port to release the gas till pressure is at “0 “. Unscrew the tube counterclockwise and put the pink silica gel into a beaker, then place it in a oven at 120 degrees Celsius for about 2 hours until the silica gel turns blue again.
Air Generator	1. Activated Carbon: The built-in dual activated carbon filters should be replaced (500g one time) after continuous use for about 500 hours or intermittent operation for about 3 months. Turn off the equipment, then open the exhaust port to release the gas till the pressure is at ‘0’, unscrew the filter counterclockwise.

4443

Warranty and Repair

Repair Record

Date	Troubleshooting and Maintenance Guide	Customer	Signature	Service Technician	Signature

45

Disclaimer

1 . LISUN reserves the right to interpret and correct any printing errors in this manual . Changes to the materials due to product upgrades or updates will not be notified

separately and will be directly included in the new version of the manual .

2 . This user manual is as comprehensive and detailed as possible based on the existing materials , but LISUN reserves the right to modify the

product ‘ s colors , parameters , and other information . Any changes will not be notified separately.

3 . There may be differences between the product information of this user manual and of the actual product . Please refer to the actual product .

4 . Users should strictly follow industry standards when using the product . Any injury or consequences caused by incorrect use or improper operation of the product , not due to the product itself , shall be borne by the user.

5. Any personal and property losses caused by force majeure or the user ‘ s own serious fault are not the responsibility of LISUN INSTRUMENTS LIMITED.

6 . LISUN INSTRUMENTS LIMITED is not responsible for any impaired functionality of the product , due to user improper actions

such as using external ports ( such as USB , serial ports , etc . ) or installing third-party software to change or add other functions .

46 Controlled document, for internal use only!