Hach LANGE LT 200 User Manual
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Hach LANGE LT 200 User Manual

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DOC022.98.00742.JAN06
LT 200

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  • Page 1 DOC022.98.00742.JAN06 LT 200...
  • Page 2 DOC022.98.00742.JAN06 Thermostat LT 200 USER MANUAL (english) January 2006, Edition 2 © Hach Lange GmbH, 2006. All rights reserved. Printed in Germany. CK/SK...

  • Page 4: Table Of Contents

    Table of Contents Section 1 Specifications ............ 45 Section 2 General Information .......... 47 2.1 Safety Information ..............47 2.1.1 Use of Hazard Information ........47 2.1.2 Precautionary Labels ..........48 2.1.3 Warning ..............48 2.2 General Product Information ..........49 2.3 Important information about the manual ......49 2.3.1 Safety Against Risk of Fire ........50 2.3.2 Chemical and Biological Safety .........50 2.4 Overview of Product/Function ..........51...
  • Page 5 Table of Contents Section 8 Contact Information ...........73 Section 9 Warranty, liability and complaints ....75...

  • Page 6: Section 1 Specifications

    Section 1 Specifications Specifications are subject to change without notice. Performance Specifications Thermostat with one heating block or two separate Type heating blocks with integrated protective lid for heating cuvette tests and reaction vessels. COD program (148 °C, 120 min) 100 °C program (100 °C, 30, 60, 120 min) Temperature programs 40 °C program (40 °C, 10 min)
  • Page 7 Specifications...

  • Page 8: Section 2 General Information

    Section 2 General Information 2.1 Safety Information Please read this entire manual before unpacking, setting up, or operating this equipment. Pay attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment.

  • Page 9: Precautionary Labels

    General Information 2.1.2 Precautionary Labels Read all labels and tags attached to the instrument. Personal injury or damage to the instrument could occur if not observed. A symbol, if noted on the instrument, will be included with a danger or caution statement in the manual.

  • Page 10: General Product Information

    General Information 2.2 General Product Information The thermostat has been designed in accordance with the current state of the technology and the acknowledged safety regulations. The manufacturer certifies that this instrument was tested thoroughly, inspected and found to meet its published specifications when it was shipped from the factory.

  • Page 11: Safety Against Risk Of Fire

    General Information 2.3.1 Safety Against Risk of Fire Certain electrical circuits within this equipment are protected by fuses against over-current conditions. For continued protection against a risk of fire, replace fuses only with the same type and rating specified. 2.3.2 Chemical and Biological Safety DANGER Handling chemical samples, standards and reagents can be dangerous.

  • Page 12: Overview Of Product/Function

    The small openings (diameter 13 mm) in the heating block are suitable for the HACH LANGE cuvette tests, e.g. COD and phosphate cuvettes. The larger openings (diameter 20 mm) are intended for reaction vessels. Sample preparation, e.g.
  • Page 13 General Information...

  • Page 14: Section 3 Installation

    Section 3 Installation DANGER Only qualified personnel should conduct the tasks described in this section of the manual. 3.1 Unpacking the Instruments 1. Remove the LT 200 thermostat and accessories from the shipping container. 2. Do not push any loose objects under the instrument, as this could affect its stability.

  • Page 15: Front- And Back View

    Installation 3.2 Front- and back view Figure 1 Front view of the LT 200 thermostat Protective lid Touch-sensitive Keys 20 mm digestion cuvettes Display 13 mm cuvette tests Left heating block Right heating block...
  • Page 16 Installation Figure 2 Back view of the LT 200 thermostat On/Off switch Nameplate Plug in power supply...
  • Page 17 Installation...

  • Page 18: Section 4 Operation

    Section 4 Operation 4.1 Software Menu SELECT BLOCK Select the heating block. LEFT/RIGHT SELECT PROGRAM Selection of 100 °C temperature program. Heats 100 ° cuvettes for 30, 60, or 120 minutes at 100 °C. DIGESTION PERIOD? Selection of temperature time. 120’/60’/30 For example, the “100 °C, 60 minutes”...
  • Page 19 Operation...

  • Page 20: Section 5 Start Up

    Start up Section 5 Start up 5.1 Starting up Place the thermostats on a stable, level, heat-resistant surface. Plug one end of the power supply into the back of the thermostat, below the power switch, and plug the other into an earthed mains power socket (115/230 Volt +5%/-15% / 50/60 Hz).
  • Page 21 Start up Figure 3 Display and Keys of the LT 200 thermostat Display Touch-sensitive Keys The instrument is operated using three touch-sensitive keys located below the display (Figure 3). The function of the key depends on the display. If no function is shown for a specific key, that key is not currently active.

  • Page 22: Routine Operation

    Start up 5.2 Routine operation • Prepare the cuvettes as described in the working procedure. • Switch on the thermostat and open the protective lid. • Place the cuvettes in a heating block and close the protective lid. 1. Select the required temperature program using the appropriate keys.

  • Page 23: Clock Symbol

    Start up 5.2.2 Clock symbol Clock symbol Description The remaining time counts down to zero. 5.2.3 Beep functions Beep function Description Thermostat is ready for 1 beep operation after initialization. Set temperature has been 2 beeps reached. End of temperature 3 beeps program.

  • Page 24: Selecting The Program

    Start up 5.3 Selecting the program The temperature programs can be selected totally independently for the right and the left heating blocks. If a change of setting is selected, the user is prompted to specify whether the change concerns the right or the left heating block.
  • Page 25 Start up The 100 °C program heats cuvettes for 30, 60 or 120 minutes at 100 °C. The setting “100°C, 60 minutes” is needed, for example, to determine phosphate and chromium or for digesting heavy metals. Note: Press to confirm your selection or press the to return to the program selection UP ARROW KEY screen.

  • Page 26: User Programs

    Start up 5.4 User programs The LT 200 can accommodate 6 user programs in the storage locations PRG1 to PRG6. The following example illustrates how users can program their own temperature programs: 1. Press key below PRG1 2. Press key below PROG 3.

  • Page 27: Language

    Start up 5. Press the UP AND DOWN ARROW KEYS set the time to a value between 0 and 480 minutes. Note: Press to confirm the entry. 6. Press to confirm the program. Note: The program can be changed by pressing PROG Note: Press the to return to the...

  • Page 28: Section 6 Maintenance

    Section 6 Maintenance 6.1 Cleaning the Instrument The thermostat is a maintenance-free instrument. To ensure reliable and precise operation, it must be kept clean. • Before cleaning the thermostat you should switch it off, unplug the power cord and allow the instrument to cool. •...

  • Page 29: Instrument Test

    Maintenance 6.2 Instrument test The temperature shown in the display corresponds to the temperature in a closed LANGE cuvette filled with an aqueous medium. During the heating phase, the real block temperature in the vicinity of the heater may be higher than the temperature shown in the display.
  • Page 30 Maintenance 2. Press your thumb against the inside of the cover and carefully bend the cover upward and lift it out of its mounting (Figure 3. Lift the protective cover slightly and take the other side out of the mounting. 4.
  • Page 31 Maintenance...

  • Page 32: Section 7 Troubleshooting

    Section 7 Troubleshooting The temperature of the heating block is higher than BLOCK IS TOO HOT! the target temperature. Wait until the heating block PLEASE WAIT cools. The thermostat is defective. Please contact INIT ERROR Customer Service.
  • Page 33 Troubleshooting...
  • Page 34 Salford Manchester, M50 1DL Tel. +44 (0)161 872 14 87 Fax +44 (0)161 848 73 24 info@hach-lange.co.uk www.hach-lange.co.uk Information Required • Hach account number (if available) • Billing address • Your name and phone number • Shipping address • Purchase order number •...
  • Page 35 Contact Information...
  • Page 36 Section 9 Warranty, liability and complaints The manufacturer warrants that the product supplied is free of material and manufacturing defects and undertakes the obligation to repair or replace any defective parts at zero cost. The warranty period for instruments is 24 months.
  • Page 37 Warranty, liability and complaints...

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