Metrohm 944 Manual
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Metrohm 944 Manual

Professional uv/vis detector vario
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944 Professional UV/VIS Detector Vario
2.944.0010
Manual
8.944.8001EN / 2019-09-27

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Summary of Contents for Metrohm 944

  • Page 1 944 Professional UV/VIS Detector Vario 2.944.0010 Manual 8.944.8001EN / 2019-09-27...
  • 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 944 Professional UV/VIS Detector Vario 2.944.0010 Manual 8.944.8001EN / 2019-09-27...
  • 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

    Connecting the instrument to a computer ......19 3.6.2 Connecting the instrument to the power grid ......19 4 Start-up 5 Operation 6 Operation and maintenance Care ..................24 Maintenance by Metrohm Service ........24 Door ..................25 ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)
  • Page 6 8 Technical specifications Reference conditions ............34 UV/VIS detector ..............34 Lamps .................. 36 Ambient conditions ............36 Housing ................36 Weight ................. 37 Power connection ............... 37 Interfaces ................37 9 Accessories Index ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)
  • Page 7 Lamp intensity too high ..............22 Figure 13 Operating hours counter ..............25 Figure 14 Lamp module .................. 25 Figure 15 Lamp module – without UV lamp ............ 27 Figure 16 Flow-through cell – parts ..............31 ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 9: Introduction

    Additional information on operating MagIC Net can be found in the docu- ment "MagIC Net Tutorial" or in the software's online help. Intended use The 944 Professional UV/VIS Detector Vario is used as an independent detector with various analysis instruments of the Metrohm line of instru- ments.

  • Page 10: Symbols And Conventions

    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. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 11: Safety Instructions

    The electrical safety when working with the instrument is ensured as part of the international standard IEC 61010. WARNING Only personnel qualified by Metrohm are authorized to carry out service work on electronic components. WARNING Never open the housing of the instrument. The instrument could be damaged by this.

  • Page 12: Tubing And Capillary Connections

    This product is covered by European Directive 2012/19/EU, WEEE – Waste Electrical and Electronic Equipment. The correct disposal of your old instrument will help to prevent negative effects on the environment and public health. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)
  • Page 13 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction More details about the disposal of your old instrument can be obtained from your local authorities, from waste disposal companies or from your local dealer. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 14: Overview Of The Instrument

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2.1 Front 2 Overview of the instrument Front Figure 1 Front Flow-through cell Standby indicator ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 15: Rear

    11 USB 1 connection socket 12 PC connection socket For connecting additional USB devices. For connecting the USB cable to the PC. 13 VIS connection socket For connecting the cable of the VIS lamp. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 16: Installation

    Flex family. For many applications with photometric detection, a post-col- umn derivatization with the 943 Professional Thermostat / Reactor Vario (2.943.0110) is required. To build such a system, you will need a 944 Pro- fessional UV/VIS Detector Vario and the following instruments: any 940 Professional IC Vario, or ￭...

  • Page 17: Figure 3 Setup Configurations

    Base tray with sensor for Professional IC instruments (6.2061.110) ￭ If you would like to stack a 930 Compact IC Flex on a 944 Professional UV/VIS Detector Vario, a 943 Professional Thermostat / Reactor Vario and/or a 942 Extension Module Vario, then you will need the System Con- nector (6.2061.120) to accommodate the different base sizes.

  • Page 18: Base Tray And Bottle Holder

    Unplug the leak sensor cable before you remove the base tray. ￭ Remove all the capillaries from the capillary ducts before you remove ￭ the base tray. Removing the base tray Prerequisites The instrument is switched off. ￭ ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 19: Figure 4 Removing The Base Tray

    All of the cable connections on the rear have been disconnected. ￭ There are no loose parts in the instrument. ￭ The instrument is lying on its side, and the bottom surface is visible. ￭ Accessories 3 mm hex key (6.2621.100) ￭ ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 20: Figure 5 Mounting The Base Tray

    Drainage tubing is disconnected from the drainage tubing connection ￭ of the bottle holder. The capillaries are removed from the guide ducts between the instru- ￭ ment and the bottle holder. Accessories 3 mm hex key (6.2621.100) ￭ ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 21: Figure 6 Removing The Bottle Holder

    Stack other instruments in the required order. Mount the bottle holder (6.2061.100) onto the topmost instrument on the stack. Mounting the bottle holder Prerequisite The instrument is switched off. ￭ Accessories 3 mm hex key (6.2621.100) ￭ ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 22: Figure 7 Mounting The Bottle Holder

    5 If one of the instruments in the stack is equipped with a leak sensor connection socket, connect the leak sensor (see manual of the IC instrument). 6 Restore any capillary connections that may have been removed. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 23: Installing The Flow-Through Cell

    Cell holder Cover plate Holder for the flow-through cell. Protects the cell holder form contamination if no cell is installed. Knurled screws Cylinder screw For the correct alignment of the flow- through cell. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)
  • Page 24 In order to fix the flow-through cell in the correct position, the two knurled screws must be tightened symmetrically and with constant force. Any tilting, twisting or canting of the flow-through cell influences the light incidence and thus the measuring results. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 25: Connecting The Flow-Through Cell

    Slide the presssure screw over the detector input capillary such ￭ that a small part of the capillary is visible at the top. Tighten the detector input capillary in the detector inlet using the ￭ pressure screw. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 26: Figure 10 Connecting The Detector Outlet

    Screw the detector output capillary to the detector outlet with the ￭ pressure screw. NOTICE The detector output capillary (6.1831.100) is 1 m long and may not be shortened. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 27: Connecting The Instrument

    Unplug the power plug immediately if you suspect that moisture has ￭ gotten inside the instrument. Only personnel who have been issued Metrohm qualifications may ￭ perform service and repair work on electrical and electronic parts. Connecting the power cord...
  • Page 28 Do not use a not permitted power cord! 1 Plugging in the power cord Plug the power cord into the instrument's power socket. ￭ Connect the power cord to the power grid. ￭ ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 29: Start-Up

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 4 Start-up 4 Start-up The 944 Professional UV/VIS Detector Vario is put into operation together with the IC instrument. The following preconditions must be met before initial start-up: The 944 Professional UV/VIS Detector Vario is installed as outlined in ￭...

  • Page 30: Figure 11 Intensity Spectrum Ok

    Intensity spectrum OK If the intensity spectrum is cut off like the one in Figure 12, then the lamp settings must be adjusted (see chapter 6.6, page 28). Figure 12 Lamp intensity too high ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 31: Operation

    5 Operation The instrument is operated via MagIC Net software only. Additional infor- mation on operating MagIC Net can be found in the document "MagIC Net Tutorial" or in the software's online help. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 32: Operation And Maintenance

    Maintenance by Metrohm Service Maintenance of the instrument is best carried out as part of annual ser- vice, which is performed by specialist personnel from Metrohm. A shorter maintenance 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 33: Door

    Operating hours counter The UV lamp must be replaced if the noise on the baseline becomes too strong or when the lamp does not ignite. Figure 14 Lamp module Lamp cooling element VIS lamp holder ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)
  • Page 34 UV connection socket. 2 Loosening the fastening ring Loosen and remove the fastening ring of the UV lamp. 3 Removing the UV lamp Carefully remove the old UV lamp from the housing. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 35: Figure 15 Lamp Module - Without Uv Lamp

    Insert the new UV lamp (6.2804.060) into the opening for the UV lamp on the lamp cooling element. When doing so, make sure that the groove on the lamp socket and the screw in the lamp cooling element are aligned with each other. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 36: Replacing The Vis Lamp

    The UV lamp has been burning for at least 30 minutes. ￭ The flow-through cell is clean. ￭ The flow-through cell is rinsed with ultrapure water. ￭ The flow-through cell is free of air bubbles. ￭ ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 37: Cleaning The Flow-Through Cell

    The intensity spectrum has been checked and shows a cut-off (see fig- ￭ ure 12, page 22). 1 Starting the automatic lamp setting In MagIC Net, select the 944 UV/VIS Detector from the device ￭ table in the Configuration program part. Click on Edit ▶ Properties... to open the properties window.
  • Page 38 If the baseline is only slightly noisy, then the flow-through cell is clean. If the noise on the baseline persists, the flow-through cell must be dismantled and cleaned manually (see "Dismantling and cleaning the flow-through cell", page 31). ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 39: Figure 16 Flow-Through Cell - Parts

    Loosen and remove the knurled screws. ￭ Remove the flow-through cell from the optical block. ￭ Figure 16 Flow-through cell – parts Retaining screw Outer seal Lens Inner seal Measuring cell – opening Cell holder ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)
  • Page 40 5 Cleaning the second lens Repeat steps 2 to 4 on the opposite side of the cell holder. 6 Reinserting the flow-through cell Follow steps 3 and 4 of "Installing the flow-through cell", page 16. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 41: Troubleshooting

    Thermal equilibrium is not Ensure a constant temperature. attained. Lamp does not The lamp is defective. Replace the UV lamp (see chapter 6.4, page ignite. 25) or the VIS lamp (see chapter 6.5, page 28). ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 42: Technical Specifications

    ±1 - 50 nm Accuracy, abso- ±3 nm lute Stability ±1 nm (across temperature range) Optical resolu- 5 nm (at 254 nm) tion Measuring interval Data rate for 0.5 - 50 samples/sec each channel ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)
  • Page 43 Can only be terminated by service soft- ware or RS-232 commands. ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 44: Lamps

    370 mm Height 131 mm Depth 495 mm Base tray, housing Polyurethane hard foam (PUR) with flame retardation for fire class and bottle holder UL94V0, CFC-free, coated material Controls Indicators LED standby indicator ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 45: Weight

    1 plug, type B (for connection to PC) Output 2 plugs type A Further connec- tions Control 1 15-pin D-sub plug (female) Analog Output 1 15-pin D-sub plug (female) Service 1 15-pin D-sub plug (male) ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

  • Page 46: Accessories

    Downloading the accessories list 1 Enter https://www.metrohm.com/ into your Internet browser. 2 Enter the article number (e.g. 2.944.0010) into the search field. The search result is displayed. 3 Click on the product. Detailed information regarding the product is shown on various tabs.

  • Page 47: Index

    USB .......... 37 Adjust settings ....28 UV lamp Dimensions ......36 Lamp settings Replace ......25 Door ........25 Adjust ........ 28 VIS lamp Electrostatic charge ....4 Material ........36 Replacing ......28 ￭￭￭￭￭￭￭￭ 944 Professional UV/VIS Detector Vario (2.944.0010)

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