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wtw Turb 355 IR/T Operating Manual

Portable turbidimeter
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Operating Manual
Turb 355 IR/T
Portable turbidimeter
ba75454e03
09/2010
41

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Summary of Contents for wtw Turb 355 IR/T

  • Page 1 Operating Manual Turb 355 IR/T Portable turbidimeter ba75454e03 09/2010...
  • Page 2 Copyright Weilheim 2010, WTW GmbH © Reproduction in whole - or even in part - is prohibited without the express written permission of WTW GmbH, Weilheim. Printed in Germany.

  • Page 3: Table Of Contents

    Inhaltsverzeichnis Overview ......45 1.1 Display ........46 1.2 Keypad .
  • Page 4 Inhaltsverzeichnis...

  • Page 5: Overview

    Overview Overview The Turb 355 IR/T enables rapid and reliable turbidity measurements to be carried out on individual samples. The measuring method used corresponds to DIN EN ISO 7027 (Turb 355 IR) or US EPA 180.1 (Turb 355 T). 4 2 8 3...

  • Page 6: Display

    Overview Display The LCD display has the following display elements: ...8 Calibration symbol - instrument in Calibration mode Error symbol - flashes when an error occurs Battery symbol - is illuminated if the battery needs to be changed Measuring unit NTU or FNU Main line...

  • Page 7: Keypad

    Overview Keypad The Turb 355 IR/T has a keypad with the following 5 keys: Function Switch measuring instrument on/off Select calibration standard Start measurement; press and hold: index the cell; release again: start measurement or calibration Call up or terminate 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 maintenance of the measuring instrument. Consequently, all responsible 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 measurement of individual samples on site or in a laboratory environment. 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 operation! Safe operation is no longer possible if the measuring instrument has been damaged in transport has been stored under adverse conditions for a lengthy period of time is visibly damaged no longer operates as described in this manual.
  • Page 12 Safety...

  • Page 13: Commissioning

    Commissioning Commissioning Scope of delivery Turb 355 IR or Turb 355 T handheld turbidimeter Operating manual 3 calibration standards (0.02 / 10.0 / 1000 NTU/FNU) Two empty cuvettes 3 marking rings Cleaning cloths Carrying case with short operating manual 4 alkaline manganese batteries, type AAA/Micro (in the meter) Initial commissioning Switching on...
  • Page 14 Commissioning Display when After switching on or calibrating the following display ready to measure indicates that the instrument is ready to measure: - r d - Display during While measuring, the instrument displays moving dashes measurement prior to displaying a stable measured value: After approx.

  • Page 15: Operation

    Operation Operation Instructions for operating 4.1.1 Marking and indexing cuvettes Even completely clean quality cuvettes exhibit tiny directional differences in their light transmittance. Therefore, if you want to achieve accurate and reproducible measurement results, it is necessary to always index the sample cuvettes and calibration standards in the same way (see section 2130 of the "Standard Methods for the Examination of Water and Wastewater", 19th edition).
  • Page 16 Operation Mark a calibration standard as follows: 1 Switch on the turbidimeter: Press the key. 2 Make sure that the outside of the cuvette is clean, dry, and free of fingerprints. 3 Insert the calibration standard in the cuvette shaft so that it clicks into place.

  • Page 17: Venting The Sample

    Operation Indexing a A marked calibration standard is indexed as follows: calibration standard during calibration 1 Insert the marked calibration standard in the cuvette shaft so that it clicks into place. 2 Turn the calibration standard so that the arrow on the marking ring points to the mark on the enclosure.

  • 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 Operation 5 Make sure that the outside of the cuvette is clean, dry, and free of fingerprints. 6 Insert the cuvette in the cuvette shaft so that it clicks into place. 7 Align the cuvette: Slowly rotate the cuvette by one complete rotation (by 360 °) in small steps and hold the depressed while doing so.
  • Page 20 Operation Display when If the measured value is outside the measuring range of the measuring range is Turb 355 IR/T, 1100 flashes on the display: exceeded CAL 1 1 1 0 0 Switching the meter To switch the meter off, press the key.

  • Page 21: Calibration

    4.3.1 Basic information on calibration Why calibrate? Just like any other measuring instrument, the measuring accuracy of the Turb 355 IR/T has to be checked and adjusted at regular intervals. When to calibrate? Under normal conditions, we recommend calibrating the turbidimeter at least every three months.

  • Page 22: Preparing The Calibration

    Operation three calibration standards if the anticipated measured values lie in a limited range (partial calibration). However, when selecting the calibration points, the following rules must be followed so that the instrument measures with the precision specified in chapter 7 T within the ECHNICAL DATA calibration period:...

  • Page 23: Three-Point Calibration

    Operation 4.3.4 Three-point calibration Calibration The three-point calibration according to the calibration sequence program calibrates the instrument using the calibration standards in the following order: 1000 > 10.0 > 0.02 NTU/FNU Note If, after the end of a calibration step, you do not resume the calibration within 5 minutes, the instrument automatically switches itself off.
  • Page 24 Operation 3 Insert the 1000 NTU/FNU calibration standard in the cuvette shaft so that it clicks into place. 4 Press the key and align the cuvette as described on page 55. After releasing the key a 30 seconds countdown is displayed. The instrument measures the calibration standard and afterwards shortly displays the 1000.
  • Page 25 Operation 0 0 2 7 Insert the 0.02 NTU/FNU calibration standard in the cuvette shaft so that it clicks into place. 8 Press the key and align the cuvette as described on page 55. After releasing the key a 30 seconds countdown is displayed.

  • Page 26: Partial (User-Defined) Calibration

    Operation 4.3.5 Partial (user-defined) calibration You can also calibrate the instrument using two or only one calibration standard. When doing so, please follow the notes in 4.3.2 C ALIBRATION PROCEDURES 1 Switch on the turbidimeter: Press the key. 2 Press the key.
  • Page 27 Operation Note After calibration with the 0.02 NTU/FNU calibration standard, the instrument automatically terminates the calibration program and returns to the measuring mode. Terminating the When you want to terminate the calibration after a calibration calibration step is finished press the key.
  • Page 28 Operation...

  • Page 29: Maintenance, Cleaning, Disposal

    Maintenance, cleaning, disposal Maintenance, cleaning, disposal Changing the batteries Battery symbol The batteries must soon be changed if the battery symbol flashes flashes on the display: 4 2 8 3 The batteries are nearly empty and should soon be exchanged. The instrument still measures with the specified accuracy.
  • Page 30 Maintenance, cleaning, disposal Battery replacement 1 Switch off the turbidimeter: 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 compartment.

  • Page 31: Cleaning

    Maintenance, cleaning, disposal Cleaning 5.2.1 Cleaning the instrument Occasionally wipe the outside of the instrument with a damp, lint-free cloth. Disinfect the housing with isopropanol as required. Caution Avoid contact with acetone or similar detergents that contain solvents as these can damage the housing. Remove any splashes immediately.

  • 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 instrument back for service. The original packing prevents the instrument from being damaged during transport.

  • Page 33: What To Do If

    – Air bubbles in the cuvette – Remove air bubbles – Measuring instrument – Calibrate the instrument not correctly calibrated Error message Cause Remedy – Internal error – Have the instrument repaired by the WTW service department...
  • Page 34 Then release both keys. The meter switches itself off when completed. When the meter is turned on again, ERR will no longer be displayed. The meter may operate with reduced accuracy Note If a fault cannot be remedied, send the instrument to WTW.

  • Page 35: Technical Data

    Technical data Technical data Measuring principle Turb 355 IR Nephelometric acc. to DIN EN ISO 7027 Turb 355 T Nephelometric according to US EPA 180.1 Light source Turb 355 IR Infrared LED Turb 355 T White light tungsten lamp Measuring range 0.01 - 1100 NTU/FNU Resolution In the range...
  • Page 36 Technical data Ambient Storage - 25 °C ... + 65 °C temperature Operation 0 °C ... + 50 °C Sample temperature 0 °C - 50 °C Power supply Batteries 4 x alkali-manganese, size AAA/Micro Lifetime Approx. 5000 measurements Dimensions of Length 165 mm hand-held...

  • Page 37: Accessories, Options

    Description Model Order Set of calibration standards Kal. Kit P 600 547 for Turb 355 IR/T Turb 355 IR/T 0.02 / 10.0 / 1000 NTU/ Set of empty cuvettes Cell Turb 350/SET 600 606 (3 pieces) for Turb 350/355 IR or...
  • 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 appear 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 Error message (see chapter 6 W ...) HAT TO DO IF Formazine nephelometric unit Liquid Crystal Display Nephelometric turbidity units -rd- Read Calibration step active...
  • Page 41 Lists Index Air ......57 Indexing Aligning and marking a cell ..55 calibration standard .
  • Page 44 For more information on how Xylem can help you, go to xyleminc.com. ® Service address: Xylem Analytics Germany Sales GmbH & Co. KG Dr.-Karl-Slevogt-Str. 1 82362 Weilheim Germany Tel.: +49 881 183-325 Fax: +49 881 183-414 E-Mail wtw.rma@xyleminc.com Internet: www.WTW.com Xylem Analytics Germany GmbH Dr.-Karl-Slevogt-Str. 1 82362 Weilheim Germany...

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