wtw Turb 350 IR Operating Manual
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wtw Turb 350 IR Operating Manual

Portable turbidimeter
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Operating manual
Turb 350 IR
Portable Turbidimeter
ba41114e02
04/2003
43

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Summary of Contents for wtw Turb 350 IR

  • Page 1 Operating manual Turb 350 IR Portable Turbidimeter ba41114e02 04/2003...
  • Page 2 Copyright Weilheim 2000, WTW GmbH & Co. KG © Reproduction in whole - or even in part - is prohibited without the express written permission of WTW GmbH & Co. KG, Weilheim. Printed in Germany.

  • Page 3: Table Of Contents

    List of contents Overview ......47 1.1 Display ....... .48 1.2 Keypad .
  • Page 4 List of contents...

  • Page 5: Overview

    Overview Overview The Turb 350 IR enables rapid and reliable turbidity mea- surements to be carried out on individual samples. This complies with the measuring method used by ISO 7027 / DIN EN 27027. 4 2 8 3 TURB 350 IR...

  • Page 6: Display

    Overview Display The LCD display has the following display elements: ...8 Calibration symbol - instrument in the Calibration mode - Number of the selected calibration standard (when the CAL display appears), or: - Error number (flashes when the error symbol appears) Error symbol - flashes when an error occurs Battery symbol - flashes if the battery needs to be...

  • Page 7: Keypad

    Overview Keypad The Turb 350 IR has a keypad with the following 5 keys: Function Switch measuring instrument on/off Increase a value; Select settings Start measurement Reduce value; Select settings Call up Calibration mode...
  • Page 8 Overview...

  • Page 9: Safety

    Safety Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and main- tenance of the measuring instrument. Consequently, all re- sponsible personnel must read this operating manual before working with the measuring instrument. The operating manual must always be available within the vicinity of the measuring instrument.

  • Page 10: Authorized Use

    Safety Authorized use Authorized use consists exclusively of the turbidity mea- surement of individual samples on site or in a laboratory en- vironment. The technical specifications given in the T ECHNICAL chapter must be observed. Only the operation and running of the measuring instrument according to the instructions given in this operating manual is authorized.
  • Page 11 Safety Safe operation If safe operation is no longer possible, the instrument must be taken out of service and secured against inadvertent op- eration! Safe operation is no longer possible if the measuring instru- ment has been damaged in transport has been stored under adverse conditions for a lengthy period of time is visibly damaged...
  • Page 12 Safety...

  • Page 13: Commissioning

    Commissioning Commissioning Scope of delivery Turb 350 IR portable turbidity measuring instrument Operating manual 4 calibration standards (0.02 / 10.0 / 100 / 1000 NTU) Two empty cuvettes 4 alignment rings Cleaning cloths Carrying case with short operating manual 4 alkali-manganese batteries, type AAA/Micro...
  • Page 14 Commissioning 1 Place the instrument with the operating panel face down on a soft surface. 2 Undo the two screws (1). 3 Open the lid of the battery compartment (2). 4 Insert the batteries (3). While doing so, check that the poles are correct according to the diagram in the bat- tery compartment.

  • Page 15: Operation

    Operation Operation Instructions for operating 4.1.1 Marking and aligning cuvettes Even completely clean quality cuvettes exhibit tiny direction- al differences in their light transmittance. Therefore, each cuvette should be marked - both the measuring cuvettes as well as the cuvettes with the calibration standards (refer to section 2130 of the "Standard Methods for the Examination of Water and Wastewater", 19th edition).
  • Page 16 Operation 6 With the cuvette in this position, place an alignment ring on the cuvette so that the arrow on the alignment ring points to the mark on the enclosure. 7 Leave the marker ring on the light protection cap of the cuvette.

  • Page 17: Venting The Sample

    Operation 4.1.2 Venting the sample Air bubbles in the sample affect the measuring result to a massive extent because they have an extensive scattering effect on the incident light. Larger air bubbles cause sudden changes in the measured values whereas smaller air bub- bles are recorded by the instrument as turbidity.

  • Page 18: Measuring Turbidity

    Never pour liquid directly into the cuvette shaft. Always use a cuvette for the measurement. The measuring instrument only measures precisely when the cuvette is closed with the black light protective cap (WTW cuvettes). Note The outside of the cuvette always has to be clean, dry, and free of fingerprints.
  • Page 19 4 2 8 3 10 Repeat steps 2 to 9 for further samples. Display when If the measured value lies outside the measuring range of the Turb 350 IR, the display shows " -Or- -Or- -Or- " (Overrange): -Or- measuring range is...
  • Page 20 Operation The measuring instrument may briefly display " ---- ---- ": ---- ---- Display when mea- suring range is switched over or due to air bubbles - - - - This can be caused by the following: The measuring instrument carries out an automatic switchover of the measuring range.

  • Page 21: Calibration

    4.3.1 Basic information on calibration Why calibrate? Just like any other measuring instrument, the measuring ac- curacy of the Turb 350 IR has to be checked and adjusted at regular intervals. When to calibrate? Under normal conditions, we recommend calibrating the measuring instrument at least every three months.
  • Page 22 Operation Calibration points For optimum calibration over the entire measuring range of and measuring the instrument, you will require the following four calibration ranges standards: Standard no. NTU 1000 10.0 0.02 The calibration can also be performed with less than the four calibration standards if the anticipated measured values lie in a limited range (partial calibration).

  • Page 23: Preparing The Calibration

    Operation 4.3.3 Preparing the calibration Perform the following preparatory activities when you want to calibrate: 1 Have the required calibration standards ready. 2 Make sure that the outsides of the cuvettes are clean, dry, and free of fingerprints. Warning Never open the cuvettes containing the calibration stan- dards.
  • Page 24 Operation CAL 1 1 0 0 4 3 Insert the 1000 NTU calibration standard in the cu- vette shaft so that it clicks into place. 4 Align the cuvette (see section 4.1.1 M ARKING AND ALI GNING CUVETTES 5 Press the key.

  • Page 25: Partial Calibration

    Operation 1 0 0 4 7 Repeat steps 3 to 6 for the remaining calibration stan- dard nos. 3 and 4 in the same way. After calibration with calibration standard no. 4 (0.02 NTU), the mea- suring instrument automatically terminates the cali- bration program and returns to the measuring mode.
  • Page 26 Operation CAL 1 1 0 0 4 3 If required, select another calibration standard no. x (display CAL x) with the key. 4 Insert the displayed calibration standard into the cu- vette shaft so that it clicks into place. 5 Align the cuvette (see section 4.1.1 M ARKING AND ALI GNING CUVETTES 6 Press the...
  • Page 27 Operation 9 Repeat steps 4 to 8 until all required calibration stan- dards have been measured. After calibration with cal- ibration standard no. 4 (0.02 NTU), the measuring instrument automatically terminates the calibration program and returns to the measuring mode. Terminating the When you want to terminate the calibration prematurely af- calibration...
  • Page 28 Operation...

  • Page 29: Maintenance, Cleaning, Disposal

    Maintenance, cleaning, disposal Maintenance, cleaning, disposal Changing the batteries Battery symbol The batteries must be changed if the battery symbol the display flashes: 4 2 8 3 In this case, change the batteries as soon as possible. If the batteries are too weak to provide a precise measurement, the turbidity measuring instrument switches itself off.
  • Page 30 Maintenance, cleaning, disposal 1 Switch off the turbidity measuring instrument and press the key. 2 Place the instrument with the operating panel face down on a soft surface. 3 Undo the two screws (1). 4 Open the lid of the battery compartment (2). 5 Remove the old batteries from the battery compart- ment.

  • Page 31: Cleaning

    Maintenance, cleaning, disposal Cleaning 5.2.1 Cleaning the measuring instrument Occasionally wipe the outside of the measuring instrument with a damp, lint-free cloth. Disinfect the housing with iso- propanol as required. Warning Avoid contact with acetone or similar detergents that contain solvents as these can damage the housing.

  • Page 32: Disposal

    Maintenance, cleaning, disposal Disposal Packing This measuring instrument is sent out in protective transport packing material. We recommend keeping the packing material in case you have to send the measuring instrument back for service. The original packing prevents the measuring instrument from being damaged during transport.

  • Page 33: What To Do If

    What to do if... What to do if... ---- Display " " Cause Remedy - The measuring - Wait for the end of the instrument automatically measuring range switches over the switchover measuring range. - There are air bubbles in - Vent sample (see section the sample.
  • Page 34 " " appears Cause Remedy instead of the mea- - Several errors are - See ERR 1 to ERR 4 sured value present at the same time Note If a fault cannot be remedied, send the instrument to WTW.

  • Page 35: Technical Data

    Technical data Technical data Measuring principle Nephelometric acc. to ISO 7027 / DIN EN 27027 Light source Infrared LED Measuring range 0.01 - 1100 NTU Resolution Within the range 0.01 - 9.99 NTU Max 0.01 NTU Within the range 10.0 - 100.0 NTU Max 0.1 NTU Accuracy Within the range...
  • Page 36 Technical data Dimensions of Length 165 mm portable turbidity Width 70 mm measuring Height 35 mm instrument Carrying case set Depth 213 mm Width 257 mm Height 60 mm Total weight of set 1.22 kg Test certificates CE, GS...

  • Page 37: Accessories, Options

    Accessories, Options Accessories, Options Description Model Order Set, calibration stan- Kal. Kit P Turb 350 IR 600 541 dards for Turb 350 IR 0.02 / 10.0 / 100 / 1000 NTU Set, empty cuvettes Cell Turb 350/SET 600 606 for Turb 350 IR...
  • Page 38 Accessories, Options...

  • Page 39: Lists

    Lists Lists This chapter provides additional information and orientation aids. Abbreviations The list of abbreviations explains the abbreviations that ap- pear on the display or when dealing with the instrument. Index The index will help you to find the topics that you are looking for.
  • Page 40 Lists Abbreviations Calibration ERR 1 ... Error message (see chapter 6 W HAT TO DO ERR 4 ...) Liquid Crystal Display Nephelometric turbidity units -Or- Overrange Measuring range exceeded -rd- Read Calibration step active...
  • Page 41 Lists Index Calibration using Authorized use Initial commissioning 55, 71 Batteries 55, 71 Keys Calibrating LCD Display when? why? Calibration Measuring range changeover Four-point Measuring range exceeded 61, 75 Partial Measuring unit Single point terminating prematurely 67, 69 Calibration points and measuring Obligations of the operator ranges Operating safety...
  • Page 42 Lists...

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