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Hach Lachat User Instructions
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Hach Lachat User Instructions

Hach Lachat User Instructions

Amperometric detector
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DOC272.97.80511
Lachat Amperometric Detector
04/2015, Edition 1
User Instructions

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Summary of Contents for Hach Lachat

  • Page 1 DOC272.97.80511 Lachat Amperometric Detector 04/2015, Edition 1 User Instructions...

  • Page 3: Table Of Contents

    Table of contents Specifications on page 3 Startup on page 22 General information on page 3 Maintenance on page 22 Installation on page 9 Troubleshooting on page 26 User interface on page 20 Replacement parts on page 27 Specifications Specifications are subject to change without notice. Amperometric detector enclosure Specification Details...
  • Page 4 Safety information N O T I C E The manufacturer is not responsible for any damages due to misapplication or misuse of this product including, without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent permitted under applicable law.
  • Page 5 Supporting test records reside with the manufacturer. The device complies with Part 15 of the FCC Rules. Operation is subject to the following conditions: 1. The equipment may not cause harmful interference. 2. The equipment must accept any interference received, including interference that may cause undesired operation.
  • Page 6 Figure 1 System overview 1 Potentiostat (LC-3D) 6 Amperometric detector enclosure (open) 2 Direct voltage plate 7 Flow cell 3 Cell lead cable 8 Outlet tubing for the flow cell 4 BNC cable 9 Inlet tubing for the flow cell 5 Power supply for potentiostat 10 QC8500 channel Product components...
  • Page 7 Figure 2 Product components 1 Amperometric detector enclosure (closed) 8 Potentiostat (LC-3D) with power supply 2 Principles of EC Detection and Troubleshooting 9 Direct voltage plate Guide Manual 3 Cross-flow cell kit (refer to Figure 10 BNC cable 4 Electrode polishing kit (refer to Figure 11 Cell lead cable 5 Storage vial for the reference electrodes...
  • Page 8 Figure 3 Cross-flow cell kit 1 Reference electrodes with O-rings (3x) 4 Quick-release clamp 2 Carbon working electrode (MF-1000) 5 Flow cell dowel plate 3 Reference electrode holder 6 Cell gaskets, 51-μM (0.002-in.) thick (4x) Figure 4 Electrode polishing kit 1 Glass plates (2x) 5 3-μm fine diamond polish, 2 mL 2 Nylon diamond polish pads (10x)

  • Page 9: Installation

    Installation C A U T I O N Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the document. Installation guidelines Amperometric detection is a highly sensitive technique because the currents measured are usually in the picoampere or nanoampere range.
  • Page 10 Figure 5 Flow cell parts 1 Auxiliary electrode (factory installed) 4 Silver working electrode, MF-1008 (item 13 in Figure 2 on page 7) 2 Cell gasket (item 6 in Figure 3 on page 8) 5 Flow cell dowel plate (item 5 in Figure 3 on page 8) 3 Working electrode jumper (item 14 in...
  • Page 11 Condition the reference electrodes N O T I C E Do not use a tool to remove the reference electrode cap or damage to the reference electrode will occur. Condition the reference electrodes in 3 M NaCl solution for a minimum of 3 hours before initial use. Make sure that the glass part of the reference electrode is fully in the 3 M NaCl solution.
  • Page 12 Install a reference electrode Install one of the reference electrodes in the flow cell. Make sure that the reference electrode has an O-ring on it. Refer to the illustrated steps that follow. 12 English...
  • Page 13 Electrical installation Remove the cell lead cable Remove the cell lead cable that is installed in the enclosure. The installed cell lead cable is not used. Refer to the illustrated steps that follow. English 13...
  • Page 14 Install the cell lead cable Install the cell lead cable that has a red clip connector. Refer to the illustrated steps that follow. 14 English...
  • Page 15 Connect the cell lead cable Connect the cell lead cable to the flow cell and the potentiostat. Refer to Figure Figure 6 Connect the cell lead cable Install the direct voltage plate N O T I C E Set the QC8500 power to off before this procedure to prevent damage to components. Refer to the illustrated steps that follow to remove the colorimetric detector module from the QC8500 channel and install the direct voltage plate.
  • Page 16 Connect the BNC cable and the power supply W A R N I N G Fire hazard. Use only the external power supply that is specified for this instrument. N O T I C E Set the POWER switch on the potentiostat to OFF to prevent damage to the potentiostat. Connect the BNC cable to the potentiostat and the direct voltage plate.
  • Page 17 Figure 7 Connect the BNC cable and the power supply 1 BNC connector 4 Red banana jack to I OUT connector 2 BNC cable 5 Power supply plug 3 Black banana jack to GND connector Plumbing Install the manifold C A U T I O N Chemical exposure hazard.
  • Page 18 Plumb the outlet tubing Use the supplied nut, ferrule and Teflon tubing to plumb the outlet of the flow cell to a waste container. Refer to Figure Figure 8 Plumb the outlet tubing 1 Waste container 3 Enclosure drain tubing (factory installed) 2 Outlet tubing for the flow cell 4 Nut and ferrule for the outlet tubing 18 English...
  • Page 19 Connect the inlet tubing Connect the inlet tubing of the flow cell to the manifold for the QuikChem amperometric cyanide method. Refer to Figure Figure 9 Plumb the inlet tubing 1 Manifold 3 Inlet tubing for the flow cell 2 Tubing to heater 4 Inlet fitting and tubing for the flow cell (factory installed) Remove bubbles from the system...
  • Page 20 4. When the deionized water level is almost at the top of the hole, install the reference electrode. Refer to Install a reference electrode on page 12. 5. Clean all spills with a lint-free cloth. Look for leaks and blockages Make sure that there are no leaks or blockages at the flow cell, the tubing or the fittings.
  • Page 21 Figure 10 Potentiostat switches and knobs 1 APP E knob 4 RANGE nA knob 7 POWER switch 2 OFFSET knob 5 CELL MODE knob 3 DISPLAY knob 6 FILTER (Hz) switch Table 1 Knob descriptions Knob Description APP E Sets the applied potential in volts (±1.500 V). Full clockwise position is +1.500 V. Full counter- clockwise position is –1.500 V.

  • Page 22: Startup

    Startup Configure the potentiostat N O T I C E Do not set the CELL MODE knob to CELL unless liquid flows through the flow cell. Configure the potentiostat for the QuikChem amperometric cyanide methods. 1. Close the amperometric detector enclosure. 2.
  • Page 23 Clean the instrument Clean the exterior of the instrument with a moist cloth and a mild soap solution and then wipe the instrument dry as necessary. Replace the reference electrode To increase the life of the reference electrodes, replace the installed reference electrode with one of the other reference electrodes each day.
  • Page 24 6. Assemble the flow cell. Refer to Figure 5 on page 10. 7. Identify if the electrode response has increased sufficiently. • Yes—Stop. It is not necessary to polish the working electrode. • No—Polish the working electrode. Refer to Polish the working electrode on page 24.
  • Page 25 c. Push the pad down onto the glass plate. Push down from the center out to the edge to prevent air pockets between the pad and the plate. Note: The pad is less likely to lift from the glass plate when put on the day before use. 6.

  • Page 26: Troubleshooting

    5. Open the cover. The battery is attached with velcro to the back of the cover. 6. Disconnect the used battery and discard. 7. Connect the new battery. 8. Put velcro on the new battery. Attach the battery to the back of the cover. 9.

  • Page 27: Replacement Parts

    Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to the company website for contact information. Contact BASi to buy BASi replacement parts. Contact Hach to buy Lachat replacement parts. Replacement parts—BASi...
  • Page 28 Tubing, Teflon, 0.009 in. ID x 1/16 in. OD, inlet and outlet tubing for varies MR-5000 the flow cell Working electrode, silver each MF-1008 Working electrode jumper each MW-2010 Replacement parts—Lachat Description Item no. BNC cable 20925 Direct voltage plate 85272 28 English...
  • Page 30 Tel. +49 (0) 2 11 52 88-320 SWITZERLAND Fax (970) 669-2932 Fax +49 (0) 2 11 52 88-210 Tel. +41 22 594 6400 orders@hach.com info@hach-lange.de Fax +41 22 594 6499 www.hach.com www.hach-lange.de © Hach Company/Hach Lange GmbH, 2015. All rights reserved. Printed in U.S.A.