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Metrohm 940 Professional IC Vario TWO, Manual

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5.8 Servicing the high-pressure pump

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52

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940 Professional IC Vario TWO (2.940.2100)

5.8 

Servicing the high-pressure pump

NOTE

You can find a video sequence for this task in the 

Multimedia Guide IC

Maintenance

 or on the Internet at 

http://ic-help.metrohm.com/

.

Figure 14

High-pressure pump – Parts

1

Pressure screw, short (6.2744.070)

Fastened to the outlet valve holder.

2

Outlet valve holder

3

Fastening screw

4

Pump head

5

Inlet valve holder

6

Pressure screw, short (6.2744.070)

Fastened to the inlet valve holder.

7

Eluent aspiration tubing connector

Consists of a coupling with a pressure screw.

8

Pressure screw, short (6.2744.070)

Fastened to the pump output.

Maintenance interval

The following parts of the high-pressure pump must be serviced at least
once per year:

￭

Inlet valve (6.2824.170)

￭

Outlet valve (6.2824.160)

￭

Piston seal (6.2741.020)

￭

Zirconium oxide piston (6.2824.070)

Maintenance tasks can also be carried out if the following problems occur:

Summary of Contents for 940 Professional IC Vario TWO

Page 1: ...940 Professional IC Vario 940 Professional IC Vario TWO Manual 8 940 8024EN 2017 07 31...

Page 2: ......

Page 3: ...AG CH 9100 Herisau Switzerland Phone 41 71 353 85 85 Fax 41 71 353 89 01 info metrohm com www metrohm com 940 Professional IC Vario 940 Professional IC Vario TWO 2 940 2100 Manual 8 940 8024EN 2017 07...

Page 4: ...echcom metrohm com This documentation is protected by copyright All rights reserved This documentation has been prepared with great care However errors can never be entirely ruled out Please send comm...

Page 5: ...Installation 14 3 1 Setting up the instrument 14 3 1 1 Packaging 14 3 1 2 Checks 14 3 1 3 Location 14 3 2 Capillary connections in the IC system 14 3 3 Removing the handle 17 3 4 Removing transport lo...

Page 6: ...connections 47 5 3 Servicing the door 47 5 4 Column thermostat Replacing the capillaries 47 5 5 Handling the eluent 49 5 5 1 Manufacturing eluent 49 5 5 2 Changing the eluent 50 5 6 Servicing the elue...

Page 7: ...itions 76 7 2 Instrument 76 7 3 Ambient conditions 76 7 4 Housing 77 7 5 Weight 77 7 6 Leak sensor 77 7 7 Column thermostat 77 7 8 Eluent degasser 78 7 9 High pressure pump 78 7 10 Injection valve 79...

Page 8: ...ng weighting and aspiration filter 24 Figure 9 High pressure pump with purge valve 26 Figure 10 Inline filter 27 Figure 11 Pulsation absorber 28 Figure 12 Exchanging the sample loop 29 Figure 13 Colum...

Page 9: ...o contact with the electron ics to a large extent A leak sensor is integrated into the wet end Its environmental compatibility Its low noise emissions The intelligent MagIC Net software The 940 Profes...

Page 10: ...history operating hours service data etc are stored Inline filter Inline filters protect the separation column reliably from potential contami nation from the eluent The filter pads with 2 m pore siz...

Page 11: ...e 940 Professional IC Vario therefore requires the user to have basic knowledge and experience in handling toxic and caustic sub stances Knowledge regarding the application of fire prevention measures...

Page 12: ...st electrostatic charges WARNING Electronic components are sensitive to electrostatic charges and can be destroyed by discharges Do not fail to pull the power cord out of the power socket before you s...

Page 13: ...Equipment The correct disposal of your old instrument will help to prevent negative effects on the environment and public health More details about the disposal of your old instrument can be obtained...

Page 14: ...to electrical current WARNING This symbol draws attention to a possible hazard due to heat or hot instrument parts WARNING This symbol draws attention to a possible biological hazard CAUTION This symb...

Page 15: ...older Offers space for the eluent bottle s and additional accessories 2 Detector chamber Offers space for two embedded detectors and additional accessories 3 Column holder For a third separation colum...

Page 16: ...Inline filter 10 Sample degasser 11 Injection valve 12 Pulsation absorber 13 Base tray With leak sensor 14 Purge valve For deaerating the high pressure pump 15 High pressure pump 16 Eluent degasser 1...

Page 17: ...le Enables access to the detector chamber 3 Drainage tubing connection For connecting the drainage tubing which guides escaped liquids away from the detec tor chamber 4 Transport locking screws For se...

Page 18: ...e high pressure pump in the bottom plug in when transporting the instrument These screws are only installed if a plug in with a high pressure pump is used in the bottom slot 12 Base tray With leak sen...

Page 19: ...syringe 6 2816 020 from outside For manual sample injection 2 Opening for capillaries For up to 3 capillaries An opening for up to 3 capillaries is located on the door of the instru ment The two Luer...

Page 20: ...back panel is outfitted with openings through which capil laries and cables can be lead out of the detector chamber Ducts for capillaries There are ducts for capillaries between the instrument and ba...

Page 21: ...2 Overview of the instrument 940 Professional IC Vario TWO 2 940 2100 13 Figure 5 Ducts for capillaries...

Page 22: ...operation free of vibrations protected from corrosive atmosphere and contamination by chemicals The instrument should be protected against excessive temperature fluctua tions and direct sunlight 3 2...

Page 23: ...nert flexible and temperature resistant up to 80 C They can be readily cut down to the desired length with the capillary cutter 6 2621 080 Use PTFE capillaries 6 1803 0x0 are used for the low pressure...

Page 24: ...pened with ace tone 2 Slide the pressure screw over the capillary Ensure that the capillary protrudes 1 to 2 mm from the tip of the pressure screw 3 Push the capillary into the connection or coupling...

Page 25: ...is equipped with a handle in order to make it easier to transport The handle can be removed once the instrument is in place in the lab Accessories You do not need any accessories for the following wor...

Page 26: ...rument and labeled with Transport security screws Remove these transport locking screws before the initial start up Accessories For this step you need 4 mm hex key 6 2621 030 Removing the transport lo...

Page 27: ...f The software displays a warning The leak sensor functions properly only if the following preconditions are met The drainage tubing is connected The leak sensor connection cable is inserted into the...

Page 28: ...the bottle holder 3 Attach one end of the 20 cm long piece to the drainage tubing con nection on the detector chamber 4 Attach each of the loose ends of both pieces of silicone tubing to one end of th...

Page 29: ...lug the plug for the leak sensor connection cable into the leak sen sor connection socket labeled Leak Sensor 3 6 Column thermostat The column thermostat ensures that the flow of eluent and the separa...

Page 30: ...608 070 The eluent bottle cap GL 45 accessory set 6 1602 160 This accessory set contains the bottle cap an M6 tubing nipple an M8 tubing nipple two O rings and an M6 and M8 threaded stopper The tubing...

Page 31: ...lways wear gloves when handling the aspiration filter In order to avoid air bubbles after the installation of the aspiration fil ter we recommend pre rinsing the aspiration filter with water or elu en...

Page 32: ...ent bottle Insert the eluent aspiration tubing into the eluent bottle 6 1608 070 Tighten the bottle cap on the eluent bottle Adjust the length of the eluent aspiration tubing so that the aspi ration f...

Page 33: ...luents or eluents with a low buffer capacity first a little cotton then with CO2 adsorber material For all other eluents only with cotton Remove the plastic cover from the large opening of the adsorbe...

Page 34: ...t degasser is completely connected No installation work is required 3 9 Installing the high pressure pump The intelligent and low pulsation high pressure pump pumps the eluent through the system It is...

Page 35: ...orber as protection against particles 1 2 6 2744 070 6 2744 070 6 2821 120 Figure 10 Inline filter 1 Inlet capillary Connected to the purge valve 2 Outlet capillary Connected to the pulsation absorber...

Page 36: ...of the valve a defined quantity of sample solu tion is injected and flushed to the separation column with the eluent The quantity of sample solution injected is determined by the volume of the sample...

Page 37: ...allation work is required Optional Exchanging the sample loop The sample loop can be replaced to match the application see Table 1 page 28 NOTE Only use PEEK pressure screws 6 2744 010 to connect capi...

Page 38: ...3 Installing the conductivity detector The 940 Professional IC Vario provides enough space for two detectors and additional accessories in the detector chamber The detectors are available as separate...

Page 39: ...acing the detector in the instrument Follow the instructions in the chapter Inserting the detector in the manual for the detector 3 15 Connecting the sample degasser optional Gas bubbles in the sample...

Page 40: ...220 from the inlet and outlet of the sample degasser 2 Connecting the outlet capillary Push a long pressure screw over the loose end of the capillary connected to Port 1 of the injection valve Tighten...

Page 41: ...ible connections shorten the capil lary if necessary 3 16 Connecting the instrument to a computer NOTE If the instrument is connected to the computer then it must be switched off Accessories For this...

Page 42: ...n inside the instrument Only personnel who have been issued Metrohm qualification may perform service and repair work on electrical and electronic parts Connecting the power cord Accessories Power cor...

Page 43: ...ng 6 2744 040 is being used instead of the columns 1 Preparing the software Start the MagIC Net computer program Open the Equilibration tab in MagIC Net Work place Run Equilibration Import or create a...

Page 44: ...purge valve using the rotary knob approx turn Switch on the high pressure pump in MagIC Net Use the syringe to aspirate eluent until there are no more air bub bles in the eluent aspiration tubing Swi...

Page 45: ...mn can be found in the Metrohm Column Program which is available from your Metrohm representative the leaflet provided along with your separation column or the product information about the separation...

Page 46: ...pper and the sealing cap from the guard column 3 Connecting the guard column CAUTION When inserting the guard column ensure that it is inserted cor rectly based on the marked flow direction if specifi...

Page 47: ...ding which separation column is suitable for your application can be found in the Metrohm Column Program the product information for the separation column or it can be obtained through your representa...

Page 48: ...column 40 940 Professional IC Vario TWO 2 940 2100 NOTE Connect the separation column only after the initial start up of the instrument Until that point insert a coupling 6 2744 040 instead of the gua...

Page 49: ...no guard column is used not recommended Connect the col umn inlet capillary to the inlet of the separation column using a short pressure screw 6 2744 070 3 Rinsing the separation column Place a beake...

Page 50: ...tion of the eluent is modified Conditioning the system 1 Preparing the software CAUTION Ensure that the configured flow rate is not higher than the flow rate permitted for the corresponding column ref...

Page 51: ...p to the detector are leak tight If eluent is leaking out anywhere tighten the corresponding pressure screw further or loosen the pressure screw check the end of the capil lary and shorten it using th...

Page 52: ...IC Vario TWO 2 940 2100 4 Operation The 940 Professional IC Vario TWO is operated solely using the MagIC Net software You can find information on operating the software in the tuto rial for MagIC Net...

Page 53: ...instrument has been designed so that liquid is largely prevented from being able to get inside the instrument However unplug the power plug immediately if you suspect that corrosive media have got ten...

Page 54: ...irectly with each other using a coupling 6 2744 040 3 Rinse the IC system for 15 minutes with methanol ultrapure water mixture 1 4 4 Optional Only if the IC system is equipped with a suppressor In the...

Page 55: ...with an inner diameter of 0 25 mm between the high pressure pump and the detector high pressure section 5 3 Servicing the door CAUTION The door is made of PMMA poly methyl methacrylate It must never...

Page 56: ...l IC Vario TWO 2 940 2100 1 3 2 1 1 1 1 2 Figure 13 Column thermostat 1 Openings For feeding capillaries into and out of the instrument 2 Preheating grooves For regulating the temperature of the eluen...

Page 57: ...eneral measures in mind when handling the eluent The supply bottle with the eluent must be connected as indicated in chapter 3 7 page 22 This is particularly important for eluents with vol atile solve...

Page 58: ...ely successive solutions must be miscible If the system must be rinsed with organic solvents several solvents with rising or falling lipophilicity must be used NOTE To change the eluent remove the gua...

Page 59: ...nt through a filter with a pore size of 0 45 m and aspirating it via an aspiration filter 6 2821 090 Ensure that no precipitates can form when changing the eluent Salt crystals between the piston and...

Page 60: ...et valve holder 3 Fastening screw 4 Pump head 5 Inlet valve holder 6 Pressure screw short 6 2744 070 Fastened to the inlet valve holder 7 Eluent aspiration tubing connector Consists of a coupling with...

Page 61: ...let valve 2 Remove the pump head 3 Service both pistons one after the other a Remove piston b Dismantle the piston c Replace the piston seal d Replace the zirconium oxide piston e Assemble the piston...

Page 62: ...the outlet valve from the outlet valve holder 3 2 Cleaning the outlet valve Start by rinsing the outlet valve in the direction of eluent flow using a wash bottle filled with ultrapure water RBS soluti...

Page 63: ...sert the outlet valve into the outlet valve holder the seal must be visible 1 Screw the outlet valve holder up into the pump head 2 and tighten it firmly by hand and then retighten it one additional t...

Page 64: ...he inlet valve from the inlet valve holder 3 2 Cleaning the inlet valve Start by rinsing the inlet valve in the direction of eluent flow using a wash bottle filled with ultrapure water RBS solution or...

Page 65: ...and then retighten it one additional turn using the adjustable wrench 3 Refasten the connection capillary to the connection of the eluent aspiration tubing 14 7 Removing the pump head Accessories For...

Page 66: ...move the pressure screw on the pump head s outlet 14 8 3 Loosen and remove the four fastening screws 14 3 using the hex key 4 Remove the pump head 14 4 Servicing the piston Carry out the following wor...

Page 67: ...ad 6 Inlet valve 6 2824 170 7 Inlet valve holder 8 Zirconium oxide piston 6 2824 070 9 Piston cartridge Accessories For this step you need the following accessories You can find these parts in the acc...

Page 68: ...ston seal 6 2741 020 Replacing the piston seal Figure 17 Removing the piston cartridge from the pump head 1 Piston cartridge 2 Backup ring 1 Removing the piston cartridge Loosen the piston cartridge 1...

Page 69: ...new piston seal into the tool Insert the new piston seal into the recess of the sleeve 18 1 of the tool for piston seal The sealing spring must be visible from the out side Figure 18 Inserting the pi...

Page 70: ...n opening the piston cartridge counteract the pressure from the spring and carefully unscrew the cartridge Loosen the piston cartridge s screw with an adjustable wrench and carefully unscrew the screw...

Page 71: ...washer Assemble the retaining washer at the same point on the new pis ton 4 Putting the piston cartridge together Insert the inner plastic sleeve the spring and the spring retainer into the piston car...

Page 72: ...e mounted the wrong way as it has fastening bolts with different bore hole depths i e one fastening bolt is longer than all others The bore hole with the greatest depth must therefore be aligned with...

Page 73: ...let 2 5 9 Servicing the inline filter NOTE You can find a video sequence for this task in the Multimedia Guide IC Maintenance or on the Internet at http ic help metrohm com Maintenance interval The fi...

Page 74: ...er Part of the acces sories 6 2821 120 3 Filter 6 2821 130 Pack contains 10 pieces 1 Shutting off the flow Switch off the high pressure pump in the software 2 Removing the inline filter Unscrew both p...

Page 75: ...filter screw 20 2 back into the filter housing 20 1 and tighten by hand Then use two adjustable wrenches 6 2621 000 to tighten it slightly 3 Remounting the inline filter Screw pressure screws back on...

Page 76: ...y over The time required to rinse the sample path with the new sample is called the rinsing time The rinsing time depends on the transfer time The transfer time corresponds to the time the sample need...

Page 77: ...lied rinsing time is sufficient by measuring the sample carry over directly Proceed as follows to do this 1 Preparing two samples Sample A A typical sample for the application Sample B Ultrapure water...

Page 78: ...ive 5 14 2 Protecting the separation column We recommend using the following protective measures so that the sepa ration column retains its separating efficiency for as long as possible Microfilter bo...

Page 79: ...lementing quality man agement measures for instruments and software Qualification Please contact your local Metrohm representative for support in qualifica tion of instruments and software The Install...

Page 80: ...heck the eluent path and eliminate the block age Contaminations in the elu ent Check the quality of the chemicals and the water High pressure pump Defective piston seals Replace the piston seals see C...

Page 81: ...ace the separation column see Con necting the separation column page 41 The eluent contains gas bubbles Ensure that the connectors for the eluent degasser are firmly connected Deaerate the high pressu...

Page 82: ...14 4 page 70 Replace the separation column see Con necting the separation column page 41 Extreme spread of the peaks in the chromatogram Splitting dual peaks Capillary connections Dead volume in the s...

Page 83: ...00 75 Problem Cause Remedy Injection valve Defective Request Metrohm Service Vacuum is not being built Eluent degasser Vacuum connection on the rear of the instrument is not tightly sealed Seal the Va...

Page 84: ...Metal free IC system Compact system with modular design Up to two complete chromatographic systems in one housing Material Painted CFC free polyurethane hard foam fire class V0 Operating pres sure ran...

Page 85: ...accessories 7 6 Leak sensor Type Electronic no calibration necessary 7 7 Column thermostat Type Thermostat using Peltier technology for two intelligent separation col umns Adjustable tem perature rang...

Page 86: ...crement 1 L min Reproducibility of the eluent flow 0 1 deviation Pressure range Pump 0 50 0 MPa 0 500 bar Pump head 0 35 0 MPa 0 350 bar applies for the standard PEEK pump head Residual pulsa tion 1 S...

Page 87: ...ector You can find the technical specifications for the detector in the manual for the detector 7 12 Sample degasser Material Fluoropolymer Resistance to sol vents No restriction except PFC Time to es...

Page 88: ...type A labeled USB 1 and USB 2 MSB 2 MSB 8 pin Mini DIN female labeled MSB 1 and MSB 2 for Dosino stirrer remote lines etc Detector 2 15 pin high density D sub female labeled Detector 1 and Detec tor...

Page 89: ...ernet browser 2 Under Find products accessories and applications by enter the article number e g 2 940 2100 The search result is displayed 3 Under Products click on More information Detailed informati...

Page 90: ...ation filter 49 see Inline filter 27 Flow fluctuations 53 Flow increment 78 Flow range 78 Flow rate 78 Frequency 79 G Grip Also see Handle 17 Guard column Installation 37 Rinse 38 H Handle 17 Heating...

Page 91: ...lation 31 Technical specifications 79 Sample loop 28 Sample path Rinse 68 Separation column Installation 39 Protection 2 27 70 Regeneration 70 Rinse 41 Separating efficiency 70 Storage 70 Service 3 45...

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