wtw Multi 3420 Operating Manual
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wtw Multi 3420 Operating Manual

Digital meter for digital ids sensors
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OPERATING MANUAL
ba75864e18 01/2015
Multi 3420
DIGITAL METER FOR DIGITAL IDS SENSORS

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Summary of Contents for wtw Multi 3420

  • Page 1 OPERATING MANUAL ba75864e18 01/2015 Multi 3420 DIGITAL METER FOR DIGITAL IDS SENSORS...
  • Page 2 The latest version of the present operating manual is avail- www.wtw.com. able on the Internet under Copyright © 2015, WTW GmbH Reproduction in whole - or even in part - is prohibited without the express written permission of WTW GmbH, Weilheim. Printed in Germany. ba75864e18 01/2015...

  • Page 3: Table Of Contents

    Contents Multi 3420 - Contents Overview ........7 Keypad .
  • Page 4 Contents Multi 3420 Sensor info........36 Channel display .
  • Page 5 Appendix: Firmware update....123 Firmware update for the meter Multi 3420... 123 Firmware-Update for IDS Sensors.
  • Page 6 Multi 3420 ba75864y18 01/2015...

  • Page 7: Overview

    The Multi 3420 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications. The Multi 3420 supports you in your work with the following functions:  proven calibration procedures  automatic stability control (AR), ...
  • Page 8 Multi 3420 Overview The key symbol (e.g. <MENU/ENTER>) generally indicates a short keystroke (under 2 sec) in this operating manual. A long keystroke (approx. 2 sec) is indicated by the underscore behind the key symbol (e.g. <MENU/ENTER >). <F1>: Softkeys providing situation dependent functions, e.g.: <F2>:...

  • Page 9: Display

    Multi 3420 Overview Display 22.09.2009 08:00 Info Status information Measured value (with unit) Measured parameter Continuous measurement control (CMC function) Channel display: Plug position of the sensor Sensor symbol (calibration evaluation, calibration interval) Measured temperature (with unit) Softkeys and date + time...
  • Page 10 Multi 3420 Overview Function display AutoCal Calibration with automatic buffer recognition, e.g. indicators e.g. TEC with the buffer set: Technical buffers ConCal Calibration with any buffers Error An error occurred during calibration Stability control (AutoRead) is active HOLD Measured value is frozen (<AR> key)

  • Page 11: Socket Field

    Service interface CAUTION Only connect sensors to the meter that cannot return any voltages or currents that are not allowed (> SELV and > current circuit with current limiting). WTW IDS sensors and IDS adapters meet these requirements. ba75864y18 01/2015...

  • Page 12: Automatic Sensor Recognition

     to hide menus automatically that do not concern this sensor To be able to use the automatic sensor recognition, a meter that sup- ports the automatic sensor recognition (e.g. Multi 3420) and a digital IDS sensor are required. In digital IDS sensors, sensor data are stored that clearly identify the sensor.

  • Page 13: Ids Adapter For Analog Sensors

    IDS adapter for analog sensors With the aid of an IDS adapter, you can also operate analog sensors on the Multi 3420. An IDS adapter and analog sensor together behave like an IDS sensor. The measuring electronics with the stored adapter data are in the adapter head.
  • Page 14 Multi 3420 Overview ba75864y18 01/2015...

  • Page 15: Safety

    Multi 3420 Safety Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the meter. Consequently, all responsible personnel must read this operating man- ual before working with the meter. The operating manual must always be available within the vicinity of the meter.

  • Page 16: Authorized Use

    Multi 3420 Safety Authorized use The authorized use of the meter consists exclusively of the measure- ment of the pH, ORP, conductivity and dissolved oxygen in a field and laboratory environment. The technical specifications as given in chapter 7 T...
  • Page 17  Safety datasheets of the chemical manufacturers. CAUTION In addition to the safety instructions mentioned here, also follow the safety instructions of the sensors used. The operating manuals of the sensors are available on the sup- plied CD and on the Internet under www.wtw.com. ba75864y18 01/2015...
  • Page 18 Multi 3420 Safety ba75864y18 01/2015...

  • Page 19: Commissioning

     Detailed operating manual (4 languages)  CD-ROM Power supply The Multi 3420 is supplied with power in the following ways:  Battery operation with NiMh rechargeable batteries  Mains operation with the supplied power pack. The NiMh rechargeable batteries are automatically charged while the power pack is connected.

  • Page 20: Inserting The Rechargeable Batteries

    Multi 3420 Commissioning 3.3.1 Inserting the rechargeable batteries Unscrew the two screws (1) on the underside of the meter. Open the battery compartment (2) on the underside of the meter. CAUTION Make sure that the poles of the rechargeable batteries are posi- tioned correctly.

  • Page 21: Switching On The Meter

    Make sure that the ambient temperature is max. 40 °C while the power pack is connected. Connect the plug of the power pack to the socket for the power pack on the Multi 3420. Connect the original power pack to an easily accessible power outlet.

  • Page 22: Setting The Date And Time

    Multi 3420 Commissioning cable. 3.3.4 Setting the date and time See section 4.3.5 ba75864y18 01/2015...

  • Page 23: Operation

    Multi 3420 Operation Operation Switching on the meter Switching on Press the <On/Off> (or <On/Off >) key. The meter performs a self-test. The display shows the manufacturer's logo while the self-test is being performed. If a sensor is connected, the measured value display appears.
  • Page 24 Multi 3420 Operation Login User name Admin Password #### Change password 15.03.2014 08:00 Using <><>, enter the User name menu item and confirm with <MENU/ENTER>. The user name is highlighted. Using <><>, select a user name and confirm with <MENU/ ENTER>.
  • Page 25 Multi 3420 Operation Changing the password If the administrator has set up the access with password protection: Switch on the meter with <On/Off> (or <On/Off >). The Login dialog box appears. Using <><>, enter the User name menu item and confirm with <MENU/ENTER>.

  • Page 26: General Operating Principles

    An overview of the operating elements and the display is given in sec- display tion 1.1 and section 1.2. Operating modes, An overview of the operating modes and navigation of the Multi 3420 is navigation given in section 4.3.1 and section 4.3.3. 4.3.1 Operating modes The meter has the following operating modes: ...

  • Page 27: Display Of Several Sensors In Measuring Mode

    Multi 3420 Operation 4.3.2 Display of several sensors in measuring mode The measured values of the connected sensors can be displayed in the following ways:  Clear display of all connected sensors  Detailed display of one sensor (e.g. incl. CMC feature with pH sensors) With the softkey you can very easily switch between the two display types.
  • Page 28 Multi 3420 Operation Menus and dialogs The menus for settings and dialogs in procedures contain further sub- menus. The selection is made with the <><> keys. The current selection is displayed with a frame.  Submenus The name of the submenu is displayed at the upper edge of the frame.
  • Page 29 Multi 3420 Operation Calibration record Calibration data storage Buffer: Single-point calibration: Calibration interval: Unit for slope: mV/pH ] 2.00 4.01 7.00 10.01 (25 °C) 15.03.2014 08:00  Messages Information is marked by the [ ] symbol. They cannot be selected.

  • Page 30: Example 1 On Navigation: Setting The Language

    Multi 3420 Operation 4.3.4 Example 1 on navigation: Setting the language Press the <On/Off> key. The measured value display appears. The instrument is in the measuring mode. Info 15.03.2014 08:00 Open the Storage & config menu with <MENU/ENTER >. The instrument is in the setting mode.
  • Page 31 Multi 3420 Operation System General Interface Clock function Service information Reset 15.03.2014 08:00 Select the General submenu with <><>. The current selection is displayed with a frame. Open the General submenu with <MENU/ENTER>. General Language: Deutsch Acoustic signal: Volume Illumination:...

  • Page 32: Example 2 On Navigation: Setting The Date And Time

    Multi 3420 Operation Confirm the setting with <MENU/ENTER>. The meter switches to the measuring mode. The selected language is active. 4.3.5 Example 2 on navigation: Setting the date and time The measuring instrument has a clock with a date function. The date and time are indicated in the status line of the measured value display.

  • Page 33: Sensor-Independent Settings

    Multi 3420 Operation Select and confirm the Time menu with <><> and <MENU/ ENTER>. The hours are highlighted. Change and confirm the setting with <><> and <MENU/ ENTER>. The minutes are highlighted. Change and confirm the setting with <><> and <MENU/ ENTER>.
  • Page 34 Multi 3420 Operation Settings To open the Storage & config menu, press the <MENU/ENTER > key in the measured value display. After completing the settings, switch to the measured value display with <M>. Default settings are printed in bold. Menu item...

  • Page 35: Data Storage

    This menu contains all functions to display, edit and erase stored mea- sured values. Note Detailed information on the storage functions of the Multi 3420 is given in section 4.12. 4.4.3 Automatic Stability control The automatic Stability control (AutoRead) function continuously checks the stability of the measurement signal.

  • Page 36: Automatic Switch-Off

    Multi 3420 Operation  when the automatic Stability control is switched off. 4.4.4 Automatic switch-off The instrument has an automatic switchoff function in order to save the batteries (see section 4.4.1). The automatic switchoff switches off the measuring instrument if no key is pressed for an adjustable period.

  • Page 37: Channel Display

    Unit for slope mV/pH QSC: 15.03.2014 08:00 Channel display The Multi 3420 manages the connected sensors and displays which sensor is plugged to which connection. Channel display Display of the plug position for the respective parameter The red bar indicates for...

  • Page 38: Ph Value

    This facilitates interference-free measurements also in the following cases:  Measurement in grounded test samples  Measurement in one test sample with several sensors connected to one Multi 3420 Temperature For reproducible pH measurements, it is essential to measure the tem- measurement perature of the test sample.

  • Page 39: Measuring The Ph Value

    Multi 3420 Operation 4.7.2 Measuring the pH value Perform the preparatory activities according to section 4.7.1. Immerse the IDS pH sensor in the test sample. Info 15.03.2014 08:00 Select the pH or mV display with <M>. Stability control The stability control function (AutoRead) continually checks the stability (AutoRead ) of the measurement signal.

  • Page 40: Settings For Ph Measurements

    Multi 3420 Operation interface without the AutoRead info. Release the frozen measured value again with <AR> or <M>. The [AR] status display disappears. The display switches back to the previous indication. Criteria for a stable The Stability control function checks whether the measured values are measured value stable within the monitored time interval.
  • Page 41 Multi 3420 Operation Menu item Possible setting Description Calibration / Calibration data Outputs the calibration data storage to the storage / Output to USB flash interface USB-B (USB flash drive/USB drive or printer printer) Calibration / Calibration data Outputs the calibration data storage to the...

  • Page 42: Ph Calibration

    Multi 3420 Operation Menu item Possible setting Description Alternative temperature Takes the measured temperature value from an IDS sensor. This menu item is only available if an IDS adapter and an IDS sensor with temperature sensor are connected. pH resolution 0.001...
  • Page 43 Multi 3420 Operation Buffer set* pH values Merck 1* 4.000 20 °C 7.000 9.000 Merck 2 * 1.000 20 °C 6.000 8.000 13.000 Merck 3 * 4.660 20 °C 6.880 9.220 Merck 4 * 2.000 20 °C 4.000 7.000 10.000 Merck 5 * 4.010...
  • Page 44 Multi 3420 Operation Buffer set* pH values Metrohm * 3.996 25 °C 7.003 8.999 Beckman * 4.005 25 °C 7.005 10.013 Hamilton Duracal * 4.005 25 °C 7.002 10.013 Precisa * 3.996 25 °C 7.003 8.999 Reagecon TEC * 2.000 25 °C...
  • Page 45 Multi 3420 Operation Calibration points Calibration can be performed using one to five buffer solutions in any order (single-point to five-point calibration). The meter determines the following values and calculates the calibration line as follows: Determined Displayed calibration data values ...
  • Page 46 Multi 3420 Operation Sample record Multi 3420 Ser. no. 09250023 CALIBRATION pH Calibration date 15.03.2014 16:13:33 SenTix 940 Ser. no. B092500013 Buffer 1 4.01 Buffer 2 7.00 Buffer 3 10.01 Voltage 1 184.0 mV 24.0 °C Voltage 2 3.0 mV 24.0 °C...

  • Page 47: Calibration Interval

    Multi 3420 Operation Preparatory activities Perform the following preparatory activities when you want to calibrate: Connect the IDS pH sensor to the meter. The pH measuring window is displayed. Keep the buffer solutions ready. 4.7.5 Calibration interval The calibration evaluation is displayed as a sensor symbol.
  • Page 48 Multi 3420 Operation Note If single-point calibration was set in the menu, the calibration procedure is automatically finished with the measurement of buffer solution 1 and the calibration record is displayed. In the measured value display, select the measured parameter pH or mV with <M>.
  • Page 49 Multi 3420 Operation Wait for the end of the measurement with stability control or accept the calibration value with <MENU/ENTER>. The calibration display for the next buffer appears (voltage dis- play). If necessary, finish the calibration procedure as a single-point cal- ibration with <M>.
  • Page 50 Multi 3420 Operation Continuing with three- Thoroughly rinse the IDS pH sensor with deionized water. to five-point calibration Immerse the IDS pH sensor in the next buffer solution. When measuring without temperature sensor: Measure the temperature of the buffer manually and enter it with <><>.

  • Page 51: Carrying Out A Manual Calibration (Concal)

    Multi 3420 Operation 4.7.7 Carrying out a manual calibration (ConCal) Make sure that in the sensor menu, Buffer menu, the ConCal buffer set is correctly selected (see section 4.7.3). Use any one to five buffer solutions in ascending or descending order.
  • Page 52 Multi 3420 Operation VariCal 15.03.2014 08:00 Wait for the measurement with stability control to be completed or terminate the stability control and take over the calibration value with <MENU/ENTER>. The pH value of the buffer solution is displayed. VariCal 15.03.2014 08:00 Set the nominal buffer value for the measured temperature with <><>.
  • Page 53 Multi 3420 Operation Continuing with two- Thoroughly rinse the IDS sensor with deionized water. point calibration Immerse the IDS pH sensor in buffer solution 2. When measuring without temperature sensor: Measure the temperature of the buffer manually and enter it with <><>.
  • Page 54 Multi 3420 Operation Continuing with three- Thoroughly rinse the IDS pH sensor with deionized water. to five-point calibration Immerse the IDS pH sensor in the next buffer solution. When measuring without temperature sensor: Measure the temperature of the buffer manually and enter it with <><>.

  • Page 55: Displaying Calibration Records

    Multi 3420 Operation 4.7.8 Displaying calibration records The calibration data can be displayed and then output to the interface. Displaying the The calibration record of the last calibration is to be found under the calibration record menu item, Calibration / Calibration record. To open it in the measured value display, press the <CAL...

  • Page 56: Continuous Measurement Control (Cmc Function)

    Multi 3420 Operation 4.7.9 Continuous measurement control (CMC function) The Continuous Measurement Control (CMC function) facilitates to evaluate the current measured value instantly and definitely. After each successful calibration the scale of the pH measuring range is displayed in the measured value display. Here you can very clearly see whether or not the current measured value is in the calibrated part of the measuring range.

  • Page 57: Qsc Function (Sensor Quality Control)

    Multi 3420 Operation 4.7.10 QSC function (sensor quality control) General information The QSC function (Quality Sensor Control) is a new sensor evaluation on the QSC function for digital IDS sensors. It evaluates the condition of an IDS pH sensor individually and with a very fine grading.
  • Page 58 Multi 3420 Operation QSC calibration The QSC function is enabled by once carrying out an additional three- point calibration with special QSC buffer solutions. It covers the mea- suring range of the sensor from pH 2 to pH 11. The QSC initial calibra- tion determines the actual condition of the sensor and stores it as a reference in the sensor.
  • Page 59 Multi 3420 Operation the sensor evaluation with the sensor symbol. As soon as the three-point calibration has been successfully carried out you can decide whether to accept or discard the cal- ibration as the QSC initial calibration. The QSC initial calibration is completed. The sensor is calibrated. If you want to calibrate with special buffers for your measurements, you can subsequently carry out a normal calibration with your buffers.

  • Page 60: Orp Voltage

    This facilitates interference-free measurements also in the following cases:  Measurement in grounded test samples  Measurement with several sensors connected to one Multi 3420 in one test sample Preparatory activities Perform the following preparatory activities when you want to measure: Connect the IDS ORP sensor to the meter.
  • Page 61 Multi 3420 Operation Select the mV display with <M>. Stability control The stability control function (AutoRead) continually checks the stability (AutoRead ) of the measurement signal. The stability has a considerable impact on the reproducibility of measured values. The display of the measured parameter flashes until a stable measured value is available.

  • Page 62: Settings For Orp Measurements

    Multi 3420 Operation 4.8.3 Settings for ORP measurements Overview The following settings are possible for ORP measurements:  Resolution  Automatic stability control Settings The settings are made in the menu for measuring settings of the ORP measurement. To open the settings, display the required parameter in the measured value display and press the <MENU/ENTER>...

  • Page 63: Dissolved Oxygen

    This facilitates interference-free measurements also in the following cases:  Measurement in grounded test samples  Measurement in one test sample with several sensors connected to one Multi 3420 Temperature IDS D.O. sensors measure the temperature with a temperature sensor measurement integrated in the IDS sensor.

  • Page 64: Measuring

    Multi 3420 Operation 4.9.2 Measuring Perform the preparatory activities according to section 4.10.1. Immerse the D.O. sensor in the test sample. Info 15.03.2014 08:00 Selecting the You can switch between the following displays with <M>: displayed  D.O. concentration [mg/l] measured parameter ...
  • Page 65 Multi 3420 Operation Note If the HOLD function is active, you can, e.g. start a manual measure- ment with stability control. Release the frozen measured value again with <AR>. The HOLD function is switched off. The [HOLD] status display disappears.

  • Page 66: Settings For D.o. Sensors (Menu Or Measurement And Calibration Settings)

    Multi 3420 Operation Criteria for a stable The Stability control function checks whether the measured values are measured value stable within the monitored time interval. Measured Time interval Stability in the time interval parameter Δ D.O. concen- 20 seconds : Better than 0.03 mg/l tration Δ...
  • Page 67 Multi 3420 Operation Menu item Possible Description setting Calibration / Outputs the calibration data storage Calibration data to a connected USB flash drive/USB storage / Output printer to USB flash drive or printer Calibration / Outputs the calibration data storage...
  • Page 68 Multi 3420 Operation Menu item Possible Description setting Response time 30 ... 300 Response time of the signal filter (in seconds). A signal filter in the sensor reduces the fluctuation range of the measured value. The signal filter is character- ized by the response time t90.

  • Page 69: Check Procedure (Check Of The Fdo ® 925)

    Multi 3420 Operation ® ® 4.9.4 FDO Check procedure (check of the FDO 925) ® Why should you check With the FDO Check procedure, you can find out in a simple manner ® whether the FDO the sensor? 925 D.O. sensor should be cleaned or calibrated.
  • Page 70 Multi 3420 Operation Start the measurement with <MENU/ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. The measured parame- ter flashes. Wait for the AutoRead measurement to be completed ([HOLD][AR]) display or accept the measured value with <MENU/ENTER>.

  • Page 71: Calibration

    Multi 3420 Operation 4.9.5 D.O. calibration Why calibrate? D.O. sensors age. This changes the slope of the D.O. sensor. Calibra- tion determines the current slope of the sensor and stores this value in the instrument. Note ® The FDO 925 D.O. sensor ages so little it does not have to be regu- larly calibrated.
  • Page 72 Multi 3420 Operation Calibration evaluation of Display Calibration record Relative slope ® the FDO S = 0.94 ... 1.06 S = 0.92 ... 0.94 or S = 1.06 ... 1.08 S = 0.90 ... 0.92 or S = 1.08 ... 1.10 S <...
  • Page 73 Multi 3420 Operation Start the measurement with <MENU/ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. The measured parame- ter flashes. Wait for the AutoRead measurement to be completed ([HOLD][AR]) display or accept the calibration value with <MENU/ENTER>.

  • Page 74: Displaying Calibration Records

    Multi 3420 Operation 4.9.6 Displaying calibration records The calibration data can be displayed and then output to the interface. Displaying the The calibration record of the last calibration is available under the menu calibration record item, Calibration / Calibration record. To open it in the measured value display, press the <CAL...

  • Page 75: Conductivity

    This facilitates interference-free measurements also in the following cases:  Measurement in grounded test samples  Measurement in one test sample with several sensors connected to one Multi 3420 Temperature IDS sensors measure the temperature with a temperature sensor inte- measurement grated in the IDS sensor.
  • Page 76 Multi 3420 Operation Info 15.03.2014 08:00 Selecting the You can switch between the following displays with <M>: displayed  Conductivity [μS/cm] / [mS/cm] measured parameter  Resistivity [Ω·cm] / [kΩ·cm] / [MΩ·cm]  Salinity SaL [ ]  Total dissolved solids TDS [mg/l] / [g/l] The factor to calculate the total dissolved solids is set to 1.00 in the fac-...
  • Page 77 Multi 3420 Operation Freeze the measured value with <AR>. The [HOLD] status indicator is displayed. Using <MENU/ENTER>, activate the Stability control function manually. The [AR] status indicator appears while the measured value is assessed as not stable. A progress bar is displayed and the display of the measured parameter flashes.

  • Page 78: Temperature Compensation

    Multi 3420 Operation 4.10.3 Temperature compensation The calculation of the temperature compensation is based on the pre- set reference temperature, 20 °C or 25 °C. It appears on the display as Tr20 or Tr25. You can select one of the following temperature compensation meth- ods: ...

  • Page 79: Settings For Ids Conductivity Sensors

    Multi 3420 Operation 4.10.4 Settings for IDS conductivity sensors Overview The following settings are possible for IDS conductivity sensors:  Calibration record (display)  Calibration data storage (display)  Calibration interval  Reference temperature  Temperature compensation  TDS factor ...
  • Page 80 Multi 3420 Operation Menu item Possible Description setting Type Measuring cell used Measuring cells whose cell con- stant is determined by calibration in the KCL control standard solu- tion. Calibration range: 0.450 to 0.500 cm The currently valid cell constant is displayed in the status line.
  • Page 81 Multi 3420 Operation Setting menu of Menu item Possible set- Description LR 925/01 ting Cell constant 0.090 ..The cell constant can be dis- 0.100 ... played and set here 0.110 cm Temp. comp. (TC) / Procedure for temperature...

  • Page 82: Determining The Cell Constant (Calibration In Control Standard)

    Multi 3420 Operation 4.10.5 Determining the cell constant (calibration in control standard) Why determine the cell Aging slightly changes the cell constant, e. g. due to coatings. As a constant? result, an inexact measured value is displayed. The original character- istics of the cell can often be restored by cleaning the cell.
  • Page 83 Multi 3420 Operation Display Calibration Cell constant [cm record Outside the range Error Error 0.450 ... 0.500 cm Eliminate the error according to chapter 6 W HAT TO DO IF Determining the cell For this calibration procedure, the Type setting must be set to cal . Pro-...

  • Page 84: Displaying Calibration Records

    Multi 3420 Operation 4.10.6 Displaying calibration records The calibration data can be displayed and then output to the interface. Displaying the The calibration record of the last calibration is to be found under the calibration record menu item, Calibration / Calibration record. To open it in the measured value display, press the <CAL...

  • Page 85: Turbidity Measurement (Visoturb ® 900-P)

    This facilitates interference-free measurements also in the following cases:  Measurement in grounded test samples  Measurement with several sensors connected to one Multi 3420 in one test sample  Avoid gas bubbles (e.g. air bubbles) in the test sample.

  • Page 86: Measuring

    Multi 3420 Operation Note To position the sensor optimally and permanently while it is measuring, fix it on a support. 4.11.2 Measuring You can carry out turbidity measurements as follows: Perform the preparatory activities according to section 4.11.1. Immerse the sensor in the test sample at an angle and then position it in the measuring vessel (see section 4.11.1).

  • Page 87: Settings For Turbidity Sensors

    Multi 3420 Operation parameter flashes until a stable measured value is available. Irrespective of the setting for automatic Stability control (see section 4.4.3) in the System menu, you can start the Stability control function manually at any time. Freeze the measured value with <AR>.

  • Page 88: Calibration

    Multi 3420 Operation Settings The settings are made in the menu for the measured parameter, turbid- ity. To open the settings, display the required measured parameter in the measured value display and press the <MENU/ENTER> key. After completing the settings, switch to the measured value display with <M>.
  • Page 89 4.11.1). This standard should be freshly prepared prior to every calibration. Suitable bottles are listed in the price list of the WTW catalog "Lab and field instrumentation“. Standards with turbidity values for the calibration ranges 2 and 3 are available as accessories (see price list of the WTW catalog "Lab and field instrumentation“).
  • Page 90 Multi 3420 Operation In the measured value display, select the TRB measuring win- dow with <> <> and <M>. Start the calibration with <CAL>. The calibration display appears. Standard 0.0 FNU 15.09.2014 08:00 Thoroughly rinse the turbidity sensor with distilled water and dry it with a lint-free cloth.

  • Page 91: Calibration Data

    Multi 3420 Operation Immerse the turbidity sensor in the test sample at an angle. Position the turbidity sensor in the measuring vessel (see sec- tion 4.11.1). Use <> <> and <><> to set the concentration of the standard solution for each digit and confirm with <MENU/ ENTER>.
  • Page 92 Multi 3420 Operation Menu item Setting/ Explanation function Calibration / Displays the calibration Calibration data record. storage / Display Further options:  Scroll through the cali- bration records with <><>.  Output the displayed cal- ibration record to the interface with <PRT>.
  • Page 93 Multi 3420 Operation Calibration record Multi 3420 (example) Ser. no. 12345678 CALIBRATION TRB: VisoTurb 900-P Ser. no. 14E999003 18.09.2014 08:09:10 0.0 FNU 124.0 FNU Sensor _____________________________________ ba75864y18 01/2015...

  • Page 94: Data Storage

    - 4 levels (+++, ++, +, -, or no evaluation) or - QSC (percentage) Storage locations The Multi 3420 meter has two measurement data memories. The mea- sured values recorded either manually or automatic are stored sepa- rately in individual measurement data memories.

  • Page 95: Manual Storage

    Multi 3420 Operation 4.12.1 Manual storage You can transmit a measurement dataset to the data storage as fol- lows. The dataset is at the same time output to the interface: Press the <STO> key shortly. The menu for manual storage appears.
  • Page 96 Multi 3420 Operation Automatic data storage ID number Set entire storing dura- Interval 30 s tion Duration 180 min continue Max. available storing 0d03h00min duration 1d17h33min 15.03.2014 08:00 Graphical display of the storage usage Settings You can configure the automatic storage function with the following set-...
  • Page 97 Multi 3420 Operation Remaining storage duration Graphical display of the storage duration 0d03h00min 15.03.2014 08:00 The active automatic storage function can be recognized by the prog- ress bar in the status line. The progress bar indicates the remaining storing duration.

  • Page 98: Editing The Measurement Data Storage

    Multi 3420 Operation 4.12.3 Editing the measurement data storage The contents of the manual or automatic measurement data storage can be shown on the display. Each of the measurement data storages has a function to erase the entire contents. Editing the data storage The storage is edited in the menu, Storage &...

  • Page 99: Erasing The Measurement Data Storage

    Multi 3420 Operation Display presentation Manual data storage 3 of 64 of a dataset 15.03.2014 11:24:16 ID number: 1 SenTix 940 B20234008565 pH 7.000 24.8 °C AR Sensor: +++ 15.03.2014 08:00 Sample printout 15.03.2014 09:56:20 Multi 3420 Ser. no. 09250023 SenTix 940 Ser.

  • Page 100: Transmitting Data

    Via the USB-A interface (USB Host) it is possible to transfer data to an external USB memory device/USB printer. 4.13.2 Connecting the PC (USB-B interface (USB Device)) Connect the Multi 3420 to the PC via the USB-B interface. Installation of the USB System requirements of the PC for installation of the USB driver: driver on the PC ...

  • Page 101: Connecting A Usb Memory Device/Usb Printer (Usb-A Interface (Usb Host))

    Multi 3420 Operation 4.13.3 Connecting a USB memory device/USB printer (USB-A interface (USB Host)) Connect the USB-A interface (USB Host) of the Multi 3420 to a USB flash drive/USB printer. Connect a USB memory device/USB printer to the USB Host interface.

  • Page 102: Data Transmission To The Usb-A Interface

    Multi 3420 Operation  Displayed dataset with Stored measured Manual values <PRT> after calling up from the storage  All datasets with the Output to RS232/USB function (USB-B interface)  All datasets with the Output to USB flash drive or printer function (USB-A interface) For details, see section 4.12.3.

  • Page 103: Multilab Importer

    Multi 3420 Operation 4.13.6 MultiLab Importer With the aid of the MultiLab Importer software, you can record and eval- uate measurement data with a PC. Note More detailed information can be found in the MultiLab Importer oper- ating manual. 4.14 MultiLab User The user administration function is activated via the MultiLab User PC software.
  • Page 104 Multi 3420 Operation Setting Default settings Man. temperature 25 °C Single-point calibration The sensor settings are reset under the Reset menu item in the menu for calibration and measurement settings. To open the settings, display the required parameter in the measured value display and press the <MENU/ENTER>...
  • Page 105 Multi 3420 Operation Setting Default settings ϰ Measured parameter Cell constant (c) Depending on the connected measuring cell: 0.475 cm (calibrated) 0.475 cm (set up) 0.100 cm Temperature compensation Reference temperature 25 °C Temperature coefficient (TC) of the 2.000 %/K...

  • Page 106: Resetting The System Settings

    Multi 3420 Operation 4.15.2 Resetting the system settings The following system settings can be reset to the default condition: Setting Default settings Language English Acoustic signal Volume Baud rate 4800 Baud Output format ASCII Decimal separator Brightness Illumination Auto Switchoff time Temperature unit °C...

  • Page 107: Maintenance, Cleaning, Disposal

    Multi 3420 Maintenance, cleaning, disposal Maintenance, cleaning, disposal Maintenance The only maintenance activity required is replacing the batteries. Note See the relevant operating manuals of the IDS sensors for instructions on maintenance. 5.1.1 Replacing the rechargeable batteries Unscrew the two screws (1) on the underside of the meter.

  • Page 108: Cleaning

    Multi 3420 Maintenance, cleaning, disposal country. End users within the European Union are obligated to return used bat- teries (even ecologically compatible ones) to a collection point set up for recycling purposes. Batteries are marked with the crossed-out waste container symbol.

  • Page 109: What To Do If

    Multi 3420 What to do if... What to do if... General information Sensor symbol flashes Cause Remedy – Calibration interval expired – Recalibrate the measuring system Cause Remedy – Batteries almost empty – Charge the batteries (see section 3.3.2 C...
  • Page 110 Multi 3420 What to do if... Data transmission to Cause Remedy USB memory device does not work – Connected USB memory device – Use other USB memory has not been recognized, e. g. device – the USB memory device has –...
  • Page 111 Multi 3420 What to do if... Error message, Cause Remedy Memory error 1 – Instrument storage was not – Please contact the service. found ba75864y18 01/2015...
  • Page 112 Multi 3420 What to do if... Error message, OFL, UFL Cause Remedy IDS pH sensor: – Measured value outside the – Use suitable IDS pH sensor measuring range – Air bubble in front of the junction – Remove air bubble –...

  • Page 113: Dissolved Oxygen

    Multi 3420 What to do if... No stable measured Cause Remedy value IDS pH sensor: – Junction contaminated – Clean junction – Membrane contaminated – Clean membrane Test sample: – pH value not stable – Measure with air excluded if necessary –...

  • Page 114: Conductivity

    Multi 3420 What to do if... Error message, Cause Remedy Error – Sensor contaminated – Clean the sensor – Measured temperature outside – Observe the temperature the operating conditions range for the measuring (OFL/UFL displayed instead of medium temperature value) –...

  • Page 115: Turbidity

    Multi 3420 What to do if... Turbidity Implausible turbidity values Cause Remedy – There are gas bubbles (e.g. air – Remove the gas bubbles, bubbles) in front of the measure- e.g. by immersing the sen- ment window sor at an angle –...
  • Page 116 Multi 3420 What to do if... ba75864y18 01/2015...

  • Page 117: Technical Data

    Multi 3420 Technical data Technical data General data Dimensions Approx. 180 x 80 x 55 mm Weight Approx. 0.4 kg Mechanical structure Type of protection IP 67 Electrical safety Protective class Test certificates CE, cETLus Ambient Storage - 25 °C ... + 65 °C...

  • Page 118: Measuring Ranges, Resolution, Accuracy

    Multi 3420 Technical data USB interface (host) Type USB 2.0 USB-A (host), USB device Applicable directives EC directive 2004/108/EC and standards EN 61326-1 EN 61000-3-2 EN 61000-3-3 FCC Class A Meter safety EC directive 2006/95/EC EN 61010-1 IP protection class...

  • Page 119: Lists

    Multi 3420 Lists Lists This chapter provides additional information and orientation aids. Specialist terms The glossary briefly explains the meaning of the specialist terms. How- ever, terms that should already be familiar to the target group are not described here.
  • Page 120 Multi 3420 Lists Oxygen saturation Short name for "Relative D.O. saturation". pH value The pH value is a measure of the acidic or basic effect of an aqueous solution. It corresponds to the negative decadic logarithm of the molal hydrogen ions activity divided by the unit of the molality. The practical pH value is the value of a pH measurement.
  • Page 121 Multi 3420 Lists Index Air calibration beaker ....68 Firmware update ....107 Authorized use .
  • Page 122 Lists Multi 3420 Setting the date ..... 23 Setting the time ..... 23 Single-point calibration pH .

  • Page 123: Appendix: Firmware Update

    Multi 3420 Appendix: Firmware update Appendix: Firmware update With the Multi 3420 you can update the firmware of your meter and IDS sensors. Firmware update for the meter Multi 3420 General information Available firmware updates for the meter are provided on the Internet.

  • Page 124: Firmware-Update For Ids Sensors

     a free USB interface (virtual COM port) on the PC  the driver for the USB interface (on the enclosed CD-ROM)  the USB cable (included in the scope of delivery of the Multi 3420). Program installation Install the downloaded firmware update on a PC.
  • Page 126 For more information on how Xylem can help you, go to www.xyleminc.com Wissenschaftlich-Technische Werkstätten GmbH Dr.-Karl-Slevogt-Straße 1 D-82362 Weilheim Germany Tel: +49 881 183-0 Fax: +49 881 183-420 E-Mail: info@wtw.com Internet: www.wtw.com...

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