Metrohm 940 Professional IC Vario TWO Manual
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Metrohm 940 Professional IC Vario TWO Manual

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940 Professional IC Vario
940 Professional IC Vario TWO
Manual
8.940.8024EN /2017-07-31

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Summary of Contents for Metrohm 940 Professional IC Vario TWO

  • Page 1 940 Professional IC Vario 940 Professional IC Vario TWO Manual 8.940.8024EN /2017-07-31...
  • Page 3 Metrohm 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 /2017-07-31...
  • Page 4 Technical Communication Metrohm AG CH-9100 Herisau techcom@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 comments regarding possible errors to the address above.

  • Page 5: Table Of Contents

    3.10 Installing an inline filter ............. 27 3.11 Installing the pulsation absorber ........27 3.12 Injection valve ..............28 3.13 Installing the conductivity detector ........30 3.14 Installing the amperometric detector ....... 31 ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 6 Protecting the separation column .......... 70 5.14.3 Storing the separation column ..........70 5.14.4 Regenerating the separation column ........70 5.15 Quality management and qualification with Metrohm ... 71 6 Troubleshooting ..................... 72 ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 7 Eluent degasser ..............78 High-pressure pump ............78 7.10 Injection valve ..............79 7.11 Detector ................79 7.12 Sample degasser ..............79 7.13 Power connection ............... 79 7.14 Interfaces ................80 8 Accessories Index ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 8 Removing the piston cartridge from the pump head ......60 Figure 18 Inserting the piston seal into the tool ..........61 Figure 19 Parts of the piston cartridge ............62 Figure 20 Inline filter – Removing the filter ............66 ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 9: Introduction

    The software controls and monitors the instrument, evaluates the measured data and manages it in a data- base. The 940 Professional IC Vario TWO consists of the following modules: Housing The sturdy housing contains the instrument's electronic components, including their interfaces and three connections for separation columns (two of which are built into the installed column thermostat).
  • Page 10 Detector Metrohm offers a series of different detectors for various analysis tasks. A suitable detector type must be ordered as a separate device. Sample degasser The sample degasser removes gas bubbles and dissolved gases from the sample.

  • Page 11: Intended Use

    (start-up, operating hours, injections etc) are stored. Intended use The 940 Professional IC Vario TWO is used for the determination of cati- ons and anions (without suppression) using ion chromatography. The two channels can be operated simultaneously or completely inde- pendently of one another.

  • Page 12: Tubing And Capillary Connections

    Damaged tubing ends lead to leakage. Appropriate tools can be used to loosen connections. Check the connections regularly for leakage. If the instrument is used mainly in unattended operation, then weekly inspections are manda- tory. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 13: Flammable Solvents And Chemicals

    Method Dialog text, parameter in the software File ▶ New Menu or menu item [Next] Button or key WARNING This symbol draws attention to a possible life-threat- ening hazard or risk of injury. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 14 WARNING This symbol draws attention to a possible biological hazard. CAUTION This symbol draws attention to possible damage to instruments or instrument parts. NOTE This symbol highlights additional information and tips. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 15: Overview Of The Instrument

    Offers space for two embedded detectors additional accessories. and additional accessories. Column holder Column thermostat For a third separation column outside the With two column holders for two separation column thermostat. columns. Inline filter Sample degasser ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 16 13 Base tray 14 Purge valve With leak sensor. For deaerating the high-pressure pump. 15 High-pressure pump 16 Eluent degasser 17 Purge valve 18 High-pressure pump For deaerating the high-pressure pump. 19 Eluent degasser ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 17: Rear

    Up to two vac- tor chamber. uum pumps can be installed in an instru- ment. Only two transport locking screws are used if just one vacuum pump is installed. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 18: Feed-Throughs For Capillaries And Cables

    Openings on the door (see Figure 3, page 11) ￭ Openings on the back panel ￭ Ducts between the instrument and the base tray as well as between ￭ the instrument and the bottle holder (see Figure 5, page 13) ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 19: Figure 3 Feed-Throughs On The Door

    The two Luer connections above are not actually openings; the capillaries are fastened to the Luer connection from within using PEEK pressure screws. You can use a syringe to inject or draw out liquid from the out- side. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 20: Figure 4 Openings For Capillaries And Cables

    The capillaries can be fed to the front of the instrument from both sides of the instrument and from the front of the instrument to the back of the instrument. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 21: Figure 5 Ducts For Capillaries

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Overview of the instrument Figure 5 Ducts for capillaries ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 22: Installation

    High-pressure pump, purge valve, inline filter, pulsation absorber, separation columns 6.2744.090 Pressure screw, long MCS, sample degasser, 10- port valve Pressure screws are tightened and loosened by hand. A tool is not nee- ded. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 23 (6.2739.000). ￭ In order to achieve optimum analysis results, capillary connections in an IC system must be absolutely tight and free of dead volume. Dead volume ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 24 2 Heat the colored sleeve, e.g. with a hairdryer. The colored sleeve shrinks and adapts to the shape of the capillary. NOTE In order to arrange capillaries more clearly, they can be bundled with the spiral band (6.1815.010). ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 25: Removing The Handle

    The handle can be removed once the instrument is in place in the lab. Accessories You do not need any accessories for the following work steps. Removing the handle 1 Removing the handle Unscrew the four knurled screws. ￭ Remove the handle. ￭ ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 26: Removing Transport Locking Screws

    Transport locking screws For the vacuum pump. For the high-pressure pump. Transport locking screws For an additional high-pressure pump in the bottom drawer. 1 Remove all of the transport locking screws with the hex key. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 27: Connecting The Drainage Tubing And Leak Sensor

    Accessories For this step you need the following parts from the accessory kit: Vario/ Flex Basic (6.5000.000): 2 × silicone tubing (6.1816.020) ￭ Y connector (6.1807.010) ￭ You also need scissors. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 28 Attach the loose end to the right-side drainage tubing connection on the base tray. 6 Attach one end of the second piece of silicone tubing to the left-side drainage tubing connection on the base tray. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 29: Connecting The Leak Sensor

    The capillaries are fed through small openings on the inner front edge, so that they do not get pinched when the door is closed. The column thermostat is completely connected. No installation work is required. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 30: Connecting The Eluent Bottle

    Push the loose end of the eluent aspiration tubing through the ￭ M8 opening of the bottle cap and screw it on for the time being. Figure 7 Installing the eluent bottle cap ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 31 Place the loose end of the eluent aspiration tubing into the aspira- ￭ tion filter. The end of the tubing should reach approximately to the center of the aspiration filter. Tighten the aspiration filter to the filter holder. ￭ ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 32: Figure 8 Installing Tubing Weighting And Aspiration Filter

    Then fix it in place using the M8 tubing nipple. Seal the M6 opening on the bottle cap with the M6 threaded ￭ stopper from the accessory set. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 33 Fill the adsorber tube and close it again using the plastic cover. Insert the adsorber tube into the bottle cap's large opening. Fas- ￭ ten it to the bottle cap using the SGJ clip (6.2023.020). ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 34: Connecting The Eluent Degasser

    ￭ The purge valve used for bleeding the pump head. ￭ Figure 9 High-pressure pump with purge valve Pump head Purge valve The high-pressure pump is completely connected. No installation work is required. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 35: Installing An Inline Filter

    The pulsation absorber is installed between the high-pressure pump and the injection valve. It protects the separation column from damage caused by pressure fluctuations, e.g. when the injection valve is switched, and reduces interfering pulsations during highly sensitive measurements. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 36: Injection Valve

    The quantity of sample solution injected is determined by: the volume of the sample loop or ￭ by an 800 Dosino when the Metrohm intelligent Partial Loop Injection ￭ Technique (MiPT), the Metrohm intelligent Pick-up Injection Technique (MiPuT) or the Metrohm Inline Preconcentration (MiPCT, MiPCT-ME) is used.

  • Page 37: Figure 12 Exchanging The Sample Loop

    Only use PEEK pressure screws (6.2744.010) to connect capillaries and the sample loop to the injection valve. Figure 12 Exchanging the sample loop Pressure screw Sample loop Fastened to Port 6. Pressure screw Fastened to Port 3. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 38: Installing The Conductivity Detector

    (6.2744.040). Accessories For this step, you need the following accessories: 2 × coupling (6.2744.040) ￭ 4 × pressure screw (6.2744.010) ￭ ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 39: Installing The Amperometric Detector

    The rinsing time increases by at least two minutes when the sample degasser is connected. Accessories For this step, you need the following accessories: 2 × pressure screw, long (6.2744.090) ￭ ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 40 3 Connecting the inlet capillary Push a long pressure screw over one end of the PTFE capillary ￭ (6.1803.040) and tighten the pressure screw to the inlet of the sample degasser (labeled In). ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 41: Connecting The Instrument To A Computer

    Connecting the USB cable 1 Insert the USB cable into the computer connection socket on the rear of the instrument labeled PC. 2 Insert the other end into a USB port on the computer. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 42: Connecting The Instrument To The Power Grid

    Unplug the power plug immediately if you suspect that moisture has ￭ gotten 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 cord, three-core with IEC 60320 instrument plug type C13.

  • Page 43: Initial Start-Up

    Switch on the instrument. ￭ MagIC Net detects the instrument and all of its modules. 3 Starting equilibration Start the equilibration in MagIC Net: Workplace ▶ Run ▶ Equili- ￭ bration ▶ Start HW. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 44 Remove the syringe from the purge needle. ￭ Pull the purge needle out of the purge capillary. ￭ 5 Rinsing the instrument without columns Rinse the instrument (without columns) with eluent for 10 ￭ minutes. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 45: Connecting And Rinsing The Guard Column

    Connecting and rinsing the guard column Guard columns protect separation columns and significantly increase their service life. The guard columns available from Metrohm are either actual guard columns or guard column cartridges used together with a cartridge holder. The process of installing a guard column cartridge into the corre- sponding holder is described in the guard column leaflet.
  • Page 46 Rinsing the guard column 1 Rinsing the guard column Place a beaker under the guard column's outlet. ￭ ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 47: Connecting The Separation Column

    NOTE Information regarding 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 representative.
  • Page 48 3.20 Connecting the separation column 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 guard column and separation column. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 49 Remove the coupling (6.2744.040) from the column outlet capil- ￭ lary. 5 Installing the outlet of the separation column Fasten the column outlet capillary to the column outlet using a ￭ short PEEK pressure screw (6.2744.070). ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 50: Conditioning

    (arrow has to point in the direction of flow). Ensure that the eluent aspiration tubing is immersed in the eluent ￭ and that there is enough eluent in the eluent bottle. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 51 4 Conditioning the system Continue rinsing the system with eluent until the desired stability level for the baseline has been attained . The instrument is now ready for measuring samples. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 52: Operation

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 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 or in the online help. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 53: Operation And Maintenance

    Maintenance by Metrohm Service Maintenance of the instrument is best carried out as part of an annual service performed by specialist personnel from Metrohm. A shorter main- tenance interval is recommended if you frequently work with caustic and corrosive chemicals. Metrohm Service offers every form of technical advice for maintenance and service of all Metrohm instruments.

  • Page 54: Shutting Down And Recommissioning

    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 software, switch the Metrohm Suppressor Module (MSM) twice during the rinsing process at five-minute intervals in each case (STEP command).

  • Page 55: Capillary Connections

    Column thermostat – Replacing the capillaries There are two preheating grooves on both of the column thermostat's side walls, where the column inlet capillary has already been inserted and fastened in place with a holder plate. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 56: Figure 13 Column Thermostat

    5.4 Column thermostat – Replacing the capillaries Figure 13 Column thermostat Openings Preheating grooves For feeding capillaries into and out of the For regulating the temperature of the eluent. instrument. Column holder With column recognition. For fastening the column. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 57: Handling The Eluent

    "p.a.". They may be diluted only by using ultrapure water (resistance > 18.2 MΩ*cm). (These specifications apply generally for all reagents used in ion chromatography.) Newly manufactured eluents always need to be microfiltered (0.45 µm fil- ter). ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 58: Changing The Eluent

    You can find these parts in the accessory kit: Vario/Flex Basic (6.5000.000) Wrench (6.2621.050) ￭ Loosening the connecting tubing Loosen the clamping screws with the wrench. ￭ Unscrew the clamping screws by hand and pull them out of the ￭ connector. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 59: Notes On Operating The High-Pressure Pump

    In order to protect the pump seals, ensure that the pump is never oper- ￭ ated dry. Therefore ensure that the eluent supply is correctly connected and that there is enough eluent in the eluent bottle each time before turning on the pump. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 60: Servicing The High-Pressure Pump

    5.8 Servicing the high-pressure pump 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 Pressure screw, short (6.2744.070) Outlet valve holder Fastened to the outlet valve holder.
  • Page 61 Internet at http://ic-help.metrohm.com/. Servicing the outlet valve and inlet valve Accessories For this step, you need the following accessories: You can find these parts in the accessory kit: Vario/Flex Basic (6.5000.000). Adjustable wrench (6.2621.000) ￭ ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 62 RBS™ solution or acetone. The rinsing solution may only come out at the valve outlet. The outlet valve must be replaced if it is still clogged after cleaning. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 63 ¼ turn using the adjustable wrench (3). Tighten the connection capillary to the auxiliary piston back onto ￭ the outlet valve holder. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 64 RBS™ solution or acetone. The rinsing solution may only come out at the valve outlet. The inlet valve must be replaced if it is still clogged after cleaning. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 65 You can find these parts in the accessory kit: Vario/Flex Basic (6.5000.000). 4 mm hex key (6.2621.030) ￭ Removing the pump head Prerequisites: Is the high-pressure pump switched off? ￭ Has the pressure been released? ￭ Is the instrument switched off? ￭ ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 66 Servicing the piston Carry out the following work on both pistons in turn. Servicing a piston consists of the following tasks: Replace the piston seal. Clean or replace the zirconium oxide piston. Reinstall the piston. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 67: Figure 15 High-Pressure Pump - Cross-Section

    (6.5000.000). Adjustable wrench (6.2621.000) ￭ Tool for piston seals (6.2617.010) consisting of a tip (16-1) for remov- ￭ ing the old piston seal and a sleeve (16-2) for inserting the new piston seal. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 68: Figure 16 Tool For Piston Seal (6.2617.010)

    Loosen the piston cartridge (17-1) using the adjustable wrench and then unscrew it from the pump head by hand. Set it aside. 2 Removing the backup ring Shake the backup ring (17-2) out of the piston opening. Set it aside. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 69: Figure 18 Inserting The Piston Seal Into The Tool

    Press the seal into the pump head recess using the wide end of the tip (16-1) of the tool. Cleaning or replacing the zirconium oxide piston Prerequisites: ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 70: Figure 19 Parts Of The Piston Cartridge

    Place the backup ring you put aside with the remaining parts. ￭ Figure 19 Parts of the piston cartridge Piston cartridge screw Retaining washer Zirconium oxide piston (6.2824.070) Spring retainer Spring (6.2824.060) Inner plastic sleeve Protects from metallic abrasion. Piston cartridge Backup ring ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 71 Clean the second piston cartridge in the same way. Mounting the pump head Accessories For this step, you need the following accessories: You can find these parts in the accessory kit: Vario/Flex Basic (6.5000.000). ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 72 The bore hole with the greatest depth must therefore be aligned with the longest bolt. Push the pump head onto the four fastening bolts (1). ￭ Tighten the four fastening screws using the hex key (6.2621.030) ￭ alternating crosswise. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 73: Servicing The Inline Filter

    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 filter must be replaced at least every 3 months; it may need to be replaced more frequently, depending on the application.

  • Page 74: Figure 20 Inline Filter - Removing The Filter

    3 Unscrewing the filter screw Use two adjustable wrenches (6.2621.000) to loosen the filter screw (20-2) from the filter housing (20-1) and unscrew it by hand. 4 Removing the filter Remove the old filter (20-3) using tweezers. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 75 4 Rinsing the inline filter Dismantle the guard column (if present) and the separation col- ￭ umn and replace with a coupling (6.2744.040). Rinse the instrument with eluent. ￭ Reinsert the columns after 10 minutes. ￭ ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 76: Servicing The Pulsation Absorber

    1 Emptying the sample path Pump air through the sample path (pump tubing, tubing connec- tions, capillary in the degasser, sample loop) for several minutes until all liquid is displaced by the air. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 77 A. The smaller this ratio, the smaller the amount of sample carry- over. This ratio can be changed by varying the rinsing time. This can be used to determine the required rinsing time for the application. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 78: Separation Column

    You can find detailed information on the separation columns available from Metrohm in the leaflet provided along with your separation column, in the Metrohm IC Column Program (available from your Metrohm representative) or on the Internet at http://www.metrohm.com...

  • Page 79: Quality Management And Qualification With Metrohm

    Metrohm offers you comprehensive support in implementing 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 Installation Qualification (IQ) and Operational Qualification (OQ) are offered by Metrohm represen- tatives as a service.

  • Page 80: Troubleshooting

    Check the eluent bottle cap (see Chapter ￭ eluent is evaporating. 3.7, page 22). Constantly stir the eluent. ￭ The pressure in the The inline filter Replace the filter (6.2821.130) . system markedly (6.2821.120) is blocked. increases. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 81 Replace the separation column (see "Con- ￭ necting the separation column", page 41). Note: Samples should always be microfiltered . Injection valve – blocked. Have the valve cleaned (by a Metrohm service engineer). The retention times Eluent - Incorrect concen- Create eluent with correct concentration.
  • Page 82 29). Sample – There are gas Use the sample degasser . bubbles in the sample. Sample – The rinsing vol- Increase the rinsing time (see Chapter 5.13, ume is too small. page 68). ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 83 Request Metrohm Service. Vacuum is not being Eluent degasser – Vacuum Seal the Vacuum connector tightly with a ￭ built connection on the rear of threaded stopper (6.1446.040). the instrument is not (tightly) sealed. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 84: Technical Specifications

    Ambient conditions Operation Ambient tem- +5 - +45 °C perature Humidity 20 - 80% relative humidity Storage Ambient tem- –20 - +70 °C perature Transport Ambient tem- –40 - +70 °C perature ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 85: Housing

    Down to 20 °C below the ambient temperature Temperature ±0.2 °C reproducibility Stability < 0.05 °C Heating time < 30 minutes from 20 to 50 °C Cooling time < 40 minutes from 50 to 20 °C ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 86: Eluent Degasser

    The shutdown mechanism is inactive at 0 MPa ￭ The shutdown mechanism becomes active two minutes after sys- ￭ tem start The pump is automatically shut down after three piston strokes ￭ below the minimum pressure limit ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 87: Injection Valve

    65 W for typical analysis application ￭ tion 25 W standby (conductivity detector to 40 °C) ￭ Power supply unit Up to 300 W maximum, electronically monitored ￭ internal fuse 3.15 A ￭ ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 88: Interfaces

    Detector tor 2) Column recogni- 3 (including 2 in the column thermostat ) tion 1 jack plug (labeled Leak Sensor) Leak sensor Further connec- 1 15-pin D-sub (female) (labeled Extension Module) ￭ tions ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 89: Accessories

    The PDF file with the accessories data will be created. NOTE When you receive your new instrument, we recommend downloading the accessories list from the Internet, printing it out and keeping it together with the manual for reference purposes. ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

  • Page 90: Index

    Power connection ....34, 79 Injection valve ......2 Door ........47 Power consumption ....79 Installation ......28 Drainage tubing Power cord ....... 34 Maintenance ...... 68 Installation ......19 Power supply unit ..... 79 ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)
  • Page 91 Column thermostat .... 77 Safety instructions ...... 3 See also "Injection valve" ..28 Detector ......80 Safety shutdown ...... 78 Eluent degasser ....78 Sample High-pressure pump ... 78 Carry-over ......68 ￭￭￭￭￭￭￭￭ 940 Professional IC Vario TWO (2.940.2100)

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