wtw Multi 9420 Operating Manual
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wtw Multi 9420 Operating Manual

Digital meter for ids sensors
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OPERATING MANUAL
ba75964e04 04/2015
Multi 9420
DIGITAL METER FOR IDS SENSORS

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  • Page 1 OPERATING MANUAL ba75964e04 04/2015 Multi 9420 DIGITAL METER FOR IDS SENSORS...
  • Page 2 For the most recent version of the manual, please visit <hyperlink>www.WTW.com. © Copyright Weilheim 2015, WTW GmbH Reproduction in whole - or even in part - is prohibited without the express written permission of WTW GmbH, Weilheim. Printed in Germany. ba75964e04 04/2015...

  • Page 3: Table Of Contents

    Meter Multi 9420 ........
  • Page 4 Contents Multi 9420 pH value......... . 27 Measuring .
  • Page 5 Multi 9420 Contents 7.3.3 Calibration procedures ......73 7.3.4 Calibration in water vapor-saturated air ... . . 73 7.3.5...
  • Page 6 15 Firmware update ........124 15.1 Firmware update for the meter Multi 9420 ....124 15.2 Firmware-Update for IDS Sensors.

  • Page 7: Overview

    Overview Overview Meter Multi 9420 The Multi 9420 meter enables you to perform measurements (pH, U, ISE, con- ductivity, D.O.) quickly and reliably. The Multi 9420 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications.

  • Page 8: Sensors

     have quick-lock couplings with which to fix the sensors to the meter. Information on available IDS sensors is given on the Internet and in the WTW catalog, "Laboratory and field instrumentation". Sensor data from IDS sensors transmit the following sensor data to the meter: IDS sensors ...

  • Page 9: Ids Adapter For Analog Sensors

    1.2.2 IDS adapter for analog sensors With the aid of an IDS adapter, you can also operate analog sensors on the Multi 9420. The combination of the IDS adapter and analog sensor behaves like an IDS sensor. The following IDS adapters can be operated on the Multi 9420:...

  • Page 10: Safety

    Safety Multi 9420 Safety Safety information 2.1.1 Safety information in the operating manual This operating manual provides important information on the safe operation of the meter. Read this operating manual thoroughly and make yourself familiar with the meter before putting it into operation or working with it. The operating manual must be kept in the vicinity of the meter so you can always find the infor- mation you need.

  • Page 11: Requirements For Safe Operation

    Multi 9420 Safety Only the operation and running of the meter according to the instructions and technical specifications given in this operating manual is authorized (see section 14 T , page 120). ECHNICAL DATA Any other use is considered unauthorized.

  • Page 12: Commissioning

     Detailed operating manual (4 languages)  CD-ROM Power supply The Multi 9420 is supplied with power in the following ways:  Mains operation with the supplied power pack  Operation of the system clock with a buffer battery if there is no mains power supply (see section 12.1.2 E...

  • Page 13: Connecting The Power Pack

    Use original power packs only (see section 14.2 G ENERAL DATA page 120). Connect the plug of the power pack to the socket for the power pack on the Multi 9420. Connect the original power pack to an easily accessible power outlet. The meter performs a self-test. ba75964e04...

  • Page 14: General Operating Principles

    Multi 9420 Operation General operating principles 3.4.1 Keypad In this operating manual, keys are indicated by brackets <..> . The key symbol (e.g. <ENTER>) generally indicates a short keystroke (press and release) in this operating manual. A long keystroke (hold for approx. 2 sec) is indicated by the underscore behind the key symbol (e.g.

  • Page 15: Display

    Multi 9420 3.4.2 Display Example (pH): AutoCal TEC HOLD AR 03.04.2013 08:00 Info 1 Status information (meter) 2 Status information (sensor) 3 Measured value 4 Measured parameter 5 Continuous measurement control (CMC function) 6 Channel display: Plug position of the sensor...

  • Page 16: Instrument Connectors

    CAUTION Only connect sensors to the meter that cannot return any volt- ages or currents that are not allowed (> SELV and > current cir- cuit with current limiting). WTW IDS sensors and IDS adapters meet these requirements. ba75964e04 04/2015...

  • Page 17: Channel Display

    Multi 9420 3.4.5 Channel display The Multi 9420 manages the connected sensors and displays which sensor is plugged to which connection. Info 03.04.2013 08:00 1 Channel display: Display of the plug position for the respective parameter The red bar indicates for each connected sensor to which plug posi- tion (channel) of the meter it is connected.

  • Page 18: Display Of Several Sensors In The Measuring Mode

    Multi 9420 SenTix 940 B092500013 More 03.04.2013 08:00 Display further sensor data (settings) with [More]. SenTix 940 B092500013 Man. temperature: 25 °C pH resolution 0.001 mV resolution Buffer Calibration interval Unit for slope mV/pH QSC: Software version 1.00 01.08.2013 08:00 3.4.7 Display of several sensors in the measuring mode...

  • Page 19: Switching On The Meter

    Multi 9420 Switching on the meter Switch the meter on with <On/Off>. The meter performs a self-test. Connect the sensor. The meter is ready to measure. Info 03.04.2013 08:00 If the user administration function is activated, the Login dialog appears after the meter is switched on (see section 3.7 L OGIN WITH , page 19).
  • Page 20 Multi 9420 Login User name Admin Password #### Change password 01.08.2013 08:00 Using <><>, select the menu item, User name and confirm with <ENTER>. The user name is highlighted. Using <><>, select a user name and confirm with <ENTER>. The login is done immediately if no password is required.

  • Page 21: Navigation

    Multi 9420 In the Password field, enter the old password with <><> and <><>and confirm it with <ENTER>. In the New password field, enter the new password with <><> and <><>and confirm it with <ENTER>. The password is changed. The login takes place. If a sensor is connected the measured value dis- play appears.
  • Page 22 Multi 9420 The selection is made with the <><> keys. The current selection is dis- played with a frame.  Submenus The name of the submenu is displayed at the upper edge of the frame. Sub- menus are opened by confirming with <ENTER>. Example:...

  • Page 23: Example 1 On Navigation: Setting The Language

    Multi 9420  Messages Information is marked by the [ ] symbol. It cannot be selected. Example: Calibration record Calibration data storage Buffer: Single-point calibration: Calibration interval: Unit for slope: mV/pH ] 2.00 4.01 7.00 10.01 01.08.2013 08:00 3.8.4 Example 1 on navigation: Setting the language Press the <On/Off>...
  • Page 24 Multi 9420 Select the System submenu with <><>. The current selection is displayed with a frame. Open the System submenu with <ENTER>. System General Interface Clock function Service information Reset 01.08.2013 08:00 Select the General submenu with <><>. The current selection is displayed with a frame.

  • Page 25: Example 2 On Navigation: Setting The Date And Time

    Multi 9420 Confirm the setting with <ENTER>. The meter switches to the measuring mode. The selected language is active. 3.8.5 Example 2 on navigation: Setting the date and time The meter has a clock with a date function. The date and time are indicated in the status line of the measured value display.
  • Page 26 Multi 9420 Change and confirm the setting with <><> and <ENTER>. The seconds are highlighted. Change and confirm the setting with <><> and <ENTER>. The time is set. If necessary, set the Date and Date format. The setting is made simi- larly to that of the time.

  • Page 27: Ph Value

    This facilitates interference-free measurements also in the following cases:  Measurement in grounded test samples  Measurement with several sensors connected to one Multi 9420 in one test sample Connect the IDS pH sensor to the meter. The pH measuring window is displayed.

  • Page 28: Measuring The Temperature

    Multi 9420 You can terminate the Stability control function and the HOLD func- tion with <AR> or <M> at any time. Using <ENTER>, activate the Stability control function manually. The [AR] status indicator appears while the measured value is assessed as not stable.

  • Page 29: Ph Calibration

    Multi 9420 pH value The display of the temperature indicates the active temperature measuring mode: Temperature Resolution of the Temp. measurement sensor temp. display 0.1 °C Automatic with temperature sensor 1 °C Manual pH calibration 4.2.1 Why calibrate? pH electrodes age. This changes the zero point (asymmetry) and slope of the pH electrode.
  • Page 30 Multi 9420 03.04.2013 08:00 Thoroughly rinse the sensor with deionized water. Immerse the sensor in the first buffer solution. For measurements without temperature sensor (e.g. when using an IDS adapter Enter the temperature of the buffer with <><>.
  • Page 31 Multi 9420 pH value Immerse the pH sensor in buffer solution 2. When measuring without temperature sensor: Enter the temperature of the buffer with <><>. Start the measurement with <ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. The measured parameter flashes.

  • Page 32: Carrying Out A Manual Calibration (Concal)

    Multi 9420 4.011 03.04.2013 08:00 Wait for the measurement with stability control to be completed or termi- nate the stability control and take over the calibration value with <ENTER>. The calibration display for the next buffer appears (voltage display).
  • Page 33 Multi 9420 pH value 03.04.2013 08:00 Thoroughly rinse the sensor with deionized water. Immerse the pH sensor in buffer solution 1. For measurements without temperature sensor (e.g. when using an IDS adapter Enter the temperature of the buffer with <><>.
  • Page 34 Multi 9420 Set the nominal buffer value for the measured temperature with <><>. Accept the calibration value with <ENTER>. The calibration display for the next buffer appears (voltage display). If necessary, finish the calibration procedure as a single-point calibration with <M>.

  • Page 35: Calibration Points

    Multi 9420 pH value Continuing with Thoroughly rinse the sensor with deionized water. three- to five-point calibration Immerse the sensor in the next buffer solution. When measuring without temperature sensor: Enter the temperature of the buffer with <><>. Start the measurement with <ENTER>.

  • Page 36: Calibration Data

    Multi 9420 Calibration Determined val- Displayed calibration data 1-point  Zero point = Asy  Slope = Nernst slope (-59.2 mV/pH at 25 °C) 2-point  Zero point = Asy Slp.  Slope = Slp. 3-point to 5- ...
  • Page 37 Multi 9420 pH value Menu item Setting/ Explanation function Calibration / Displays the calibration records. Calibration data stor- Further options: age /Display  Scroll through the calibration records with <><>.  Using <PRT>, output the dis- played calibration record to the USB-B (PC) interface or the USB- A (USB printer) interface.

  • Page 38: Continuous Measurement Control (Cmc Function)

    Multi 9420 Display Calibration Zero point Slope [mV/pH] record [mV] Clean the IDS sensor according to the sensor operating manual Error Error <-30 <-62.0 >+30 > -50,0 Error elimination (see section 13 ..., page 114) HAT TO DO IF For pH IDS sensors you can optionally enable a more finely graded calibration evaluation (QSC) (see section 4.2.8 QSC...
  • Page 39 Multi 9420 pH value The following information is displayed: Info 03.04.2013 08:00 1 Currently measured pH value (needle) 2 Marking lines for all nominal buffer values used with the last valid cali- bration 3 Measuring range for which a valid calibration is available. Measured values in this range are suitable for documentation.

  • Page 40: Qsc Function (Sensor Quality Control)

    Multi 9420 4.2.8 QSC function (sensor quality control) General information The QSC function (Quality Sensor Control) is a new sensor evaluation for on the QSC function digital IDS sensors. It evaluates the condition of an IDS pH sensor individually and with a very fine grading.
  • Page 41 Multi 9420 pH value Carry out the normal calibrations for your special measuring range with your usual standard solutions as previously done. As soon as the QSC function was enabled for an IDS sensor, it is not possible to return to the sensor evaluation with the sensor symbol for this sensor.
  • Page 42 Multi 9420 sor evaluation. Info 03.04.2013 08:00 1 QSC scale The double arrow on the QSC scale indicates the current sensor eval- uation Carrying out a QSC A QSC control calibration can, e.g. be useful if the sensor evaluation noticeably control calibration changed (after some normal calibrations).

  • Page 43: 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 9420 in one test sample IDS ORP sensors are not calibrated. However, you can check IDS ORP sensors using a test solution.

  • Page 44: Measuring The Relative Orp

    ORP voltage Multi 9420 Freeze the measured value with <AR>. The [HOLD] status indicator is displayed. The HOLD function is active. You can terminate the Stability control function and the HOLD func- tion with <AR> or <M> at any time.
  • Page 45 Multi 9420 ORP voltage ORP electrodes can be used to determine the relative ORP. Connect the ORP electrode to the meter. Prepare the reference solution for the determination of the reference point. Select the ΔU (mV display with <M>. Immerse the ORP electrode in the reference solution.

  • Page 46: Measuring The Temperature

    ORP voltage Multi 9420 5.1.3 Measuring the temperature For reproducible ORP measurements, it is essential to measure the tempera- ture of the test sample. When operating a sensor without integrated temperature sensor, you first have to measure and enter the temperature of the sample.

  • Page 47: Ion Concentration

    This facilitates interference-free measurements also in the following cases:  Measurement in grounded test samples  Measurement with several sensors connected to one Multi 9420 in one test sample Incorrect calibration of ion selective electrodes will result in incor- rect measured values.
  • Page 48 Ion concentration Multi 9420 01.08.2013 08:00 Stability control The stability control function (AutoRead) continually checks the stability of the (AutoRead) measurement signal. The stability has a considerable impact on the reproduc- & HOLD function ibility of measured values. The measured parameter flashes on the display ...

  • Page 49: Measuring The Temperature

    Multi 9420 Ion concentration Using <ENTER>, start a further measurement with stability control. Release the frozen measured value again with <AR> or <M>. The [AR] status display disappears. The display switches back to the previous indication. Criteria The AutoRead criteria affect the reproducibility of the measured values. The following criteria can be adjusted: ...

  • Page 50: Calibration

    Ion concentration Multi 9420 Calibration 6.2.1 Why calibrate? Ion-selective electrodes age and are temperature-dependent. This changes the slope. As a result, an inexact measured value is displayed. Calibration determines the calibration line of the electrode and stores this value in the meter.
  • Page 51 Multi 9420 Ion concentration Immerse the electrode in standard solution 1. When calibrating without temperature sensor:  Measure the temperature of the standard solution using a thermom- eter.  Use <F4>/[ ⇅ ] to select the setting of the temperature.
  • Page 52 Ion concentration Multi 9420 When calibrating without temperature sensor:  Measure the temperature of the standard solution using a thermom- eter.  Use <F4>/[ ⇅ ] to select the setting of the temperature.  Use <> <> to set the temperature.

  • Page 53: Calibration Standards

    Multi 9420 Ion concentration 6.2.4 Calibration standards Use two to seven different standard solutions. The standard solutions have to be selected in either increasing or decreasing order. Select the unit of the standard solution and measurement result in the ISE setup/Unit menu.
  • Page 54 Ion concentration Multi 9420 Menu item Setting/ Explanation function Calibration / Displays the calibration records. Calibration data stor- Further options: age /Display  Scroll through the calibration records with <><>.  Using <PRT>, output the dis- played calibration record to the USB-B (PC) interface or the USB- A (USB printer) interface.
  • Page 55 Multi 9420 Ion concentration Calibration record Multi 9420 (example) Ser. no. 12345678 CALIBRATION ISE 18.01.2013 08:09:10 Sensor Ser. no. 12345678 Standard 1 0.010 mg/l Standard 2 0.020 mg/l Voltage 1 38.5 mV Voltage 2 58.0 mV Temperature 1 24.0 øC Temperature 2 24.0 øC...

  • Page 56: Selecting The Measuring Method

    Ion concentration Multi 9420 Selecting the measuring method The following methods are supported:  Standard addition  Standard subtraction  Sample addition  Sample subtraction  Blank value addition Connect the ISE combination electrode to the meter. The pH/ISE measuring window is displayed.

  • Page 57: Standard Addition

    Multi 9420 Ion concentration 6.3.1 Standard addition In the "Standard addition" procedure, a known amount of standard solution is added to the sample. The ion concentration in the sample is calculated from the change in potential. Select the measuring method (see section 6.3 S ELECTING THE MEASU , page 56).
  • Page 58 Ion concentration Multi 9420 Select continue with <> <> and start the measurement with <ENTER>. When the measurement is finished an entry window appears. Standard addition Add standard! Std. volume 1.0 ml Std. conc. 1.0 mg/l continue 01.08.2013 08:00 Add the standard solution to the sample.

  • Page 59: Standard Subtraction

    Multi 9420 Ion concentration 6.3.2 Standard subtraction In the "Standard Subtraction" procedure, a known amount of standard solution is added to the sample (as complexing agent or precipitating agent) and, thus, the ion concentration lowered. The ion concentration in the sample is calculated from the change in potential.
  • Page 60 Ion concentration Multi 9420 Immerse the electrode in the sample. Using <> <> and <ENTER>, select the values for the volume of the sample (Sample volume) and the volume of the ISA/TISAB solution (ISA/TISAB vol.). Select continue with <> <> and start the measurement with <ENTER>.
  • Page 61 Multi 9420 Ion concentration Terminate the measuring method with <M>. A safety query appears. Select yes with <> <>. Confirm yes with <ENTER>. Measurement with the selected method is completed. ba75964e04 04/2015...

  • Page 62: Sample Addition

    Ion concentration Multi 9420 6.3.3 Sample addition In the "Sample addition" procedure, a known amount of sample is added to the standard solution. The ion concentration in the sample is calculated from the change in potential. Select the measuring method (see section 6.3 S ELECTING THE MEASU , page 56).
  • Page 63 Multi 9420 Ion concentration Using <> <> and <ENTER>, enter the values for the volume of the standard solution (Std. volume), the concentration of the standard solu- tion (Std. conc.) and the volume of the ISA/TISAB solution (ISA/TISAB vol.). Select continue with <> <> and start the measurement with <ENTER>.

  • Page 64: Sample Subtraction

    Ion concentration Multi 9420 6.3.4 Sample subtraction With the "Sample subtraction" procedure, a known amount of sample is added to the standard solution (complexing agent or precipitating agent). The ion concentration in the sample is calculated from the change in potential.
  • Page 65 Multi 9420 Ion concentration Measuring Start the measurement with <F1> continue. An entry window appears. Sample subtraction Immerse sensor in standard Std. volume 100.0 ml Std. conc. 1.0 mg/l ISA/TISAB vol. 1.0 ml continue 01.08.2013 08:00 Prepare the standard solution.

  • Page 66: Standard Addition With Blank Value Correction (Blank Value Addition)

    Ion concentration Multi 9420 Sample subtraction 01.08.2013 08:00 If necessary, start measuring further samples with <ENTER>. Repeat steps 8 - 16 for all samples. Terminate the measuring method with <M>. A safety query appears. Select yes with <> <>. Confirm yes with <ENTER>.
  • Page 67 Multi 9420 Ion concentration CALIBRATION ADA 94/IDS DIN B092500013 01.08.2013 08:00 #1 0.010 mg/l 20.2 mV 25.0 °C #2 0.020 mg/l 79.2 mV 25.0 °C Slp.: 54.1 mV Sensor +++ (Ion type: Ag) 01.08.2013 08:00 Measuring Start the measurement with <F1> continue An entry window appears.
  • Page 68 Ion concentration Multi 9420 Blank value addition Add standard! Std. volume 100.0 ml Std. conc. 1.0 mg/l continue 01.08.2013 08:00 Add the standard solution to the sample. Using <> <> and <ENTER>, enter the values for the volume of the standard solution (Std.

  • Page 69: Dissolved Oxygen (D.o.)

    Multi 9420 Dissolved oxygen (D.O.) Dissolved oxygen (D.O.) Measuring 7.1.1 Measuring D.O. Connect the IDS D.O. sensor to the meter. The D.O. measuring screen is displayed. If necessary, select the measured parameter with <M>. Check or calibrate the meter with the sensor.
  • Page 70 Dissolved oxygen (D.O.) Multi 9420 Air pressure The integrated air pressure sensor of the Multi 9420 measures the current air correction pressure. The air pressure is automatically used for air pressure correction during calibrating and for the display of the oxygen saturation [%] parameter.

  • Page 71: Measuring The Temperature

    Multi 9420 Dissolved oxygen (D.O.) Criteria for a stable The Stability control function checks whether the measured values are stable measured value within the monitored time interval. Measured parameter Time interval Stability in the time interval D.O. concentration 20 seconds ∆...

  • Page 72: Evaluation

    Dissolved oxygen (D.O.) Multi 9420 ® Stability control In the FDO Check procedure, the Stability control function (AutoRead) is (AutoRead) automatically activated. ® Proceed as follows to carry out the FDO Check procedure: Connect the D.O. sensor to the meter.

  • Page 73: Calibration

     When the calibration interval has expired  When your accuracy requirements are especially high  Routinely within the framework of the company quality assurance 7.3.3 Calibration procedures The Multi 9420 provides 2 calibration procedures:  Calibration in water vapor-saturated air. ® Use an OxiCal air calibration vessel for calibration.

  • Page 74: Calibration With Comparison Meas. (Fdo Comp)

    Dissolved oxygen (D.O.) Multi 9420 ® Place the FDO 925 D.O. sensor in the check and storage bea- ® ker, FDO Check. The sponge in the check and storage beaker must be moist (not wet). Leave the sensor in the check and storage beaker long enough so it can adapt to the ambient temperature.

  • Page 75: Calibration Data

    Multi 9420 Dissolved oxygen (D.O.) 03.04.2013 08:00 Start the measurement with <ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. The measured parameter flashes. Wait for the end of the AutoRead measurement or accept the calibration value with <ENTER>.
  • Page 76 Dissolved oxygen (D.O.) Multi 9420 the <CAL_> key. The calibration records of the last 10 calibrations are to be found in the menu, Calibration / Calibration data storage / Display. To open the Calibration menu, press the <ENTER> key in the measured value display.
  • Page 77 Multi 9420 Dissolved oxygen (D.O.) Display Calibration record Relative slope Error Error S < 0.90 Error elimination (see section 13 W ..., HAT TO DO IF S > 1.10 page 114) Calibration record CALIBRATION Ox 03.04.2013 07:43:33 FDO 925 Ser. no. 10146858...

  • Page 78: Conductivity

    This facilitates interference-free measurements also in the following cases:  Measurement in grounded test samples  Measurement with several sensors connected to one Multi 9420 in one test sample Connect the conductivity sensor to the meter. The conductivity measuring window is displayed.
  • Page 79 Multi 9420 Conductivity You can start the Stability control manually at any time, irrespective of the set- ting for automatic Stability control (see section 9.6.3 A UTOMATIC TABILITY CON , page 96) in the System menu. TROL Freeze the measured value with <AR>.

  • Page 80: Measuring The Temperature

    Conductivity Multi 9420 8.1.2 Measuring the temperature For reproducible conductivity measurements, it is essential to measure the temperature of the test sample. IDS sensors measure the temperature with a temperature sensor integrated in the IDS sensor. Temperature compensation The calculation of the temperature compensation is based on the preset refer- ence temperature, 20 °C or 25 °C.

  • Page 81: Calibration

    Multi 9420 Conductivity Calibration 8.3.1 Why calibrate? Aging slightly changes the cell constant, e. g. due to coatings. As a result, an inexact measured value is displayed. The original characteristics of the cell can often be restored by cleaning the cell. Calibration determines the current value of the cell constant and stores this value in the meter.

  • Page 82: Calibration Data

    Conductivity Multi 9420 Immerse the conductivity sensor in the control standard solution, 0.01 mol/l KCI. Start the measurement with <ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. The measured parameter flashes. Wait for the end of the measurement with stability control take over the calibrated value with <ENTER>.
  • Page 83 Multi 9420 Conductivity Menu item Setting/ Explanation function Calibration / Cali- Outputs the stored calibration data bration data stor- to the USB-A interface (USB mem- age / Output to ory device/USB printer) USB flash drive or printer Calibration / Outputs the stored calibration data...

  • Page 84: Settings

    Settings Multi 9420 Settings pH measurement settings 9.1.1 Settings for pH measurements The settings are made in the menu for calibration and measurement settings of the pH/ORP measurement. To open the settings, display the required mea- sured parameter in the measured value display and press the <ENTER> key.
  • Page 85 Multi 9420 Settings Menu item Possible Explanation setting Alternative temperature Takes the measured temperature value from an IDS sen- sor. This menu item is only available if an IDS adapter and an IDS sensor with temperature sensor are connected. Man. temperature -25 ...

  • Page 86: Buffer Sets For Calibration

    Settings Multi 9420 9.1.2 Buffer sets for calibration You can use the buffer sets quoted in the table for an automatic calibration. The pH values are valid for the specified temperature values. The temperature dependence of the pH values is taken into consideration during the calibration.
  • Page 87 Multi 9420 Settings Buffer set * pH values Fisher * 2.007 25 °C 4.002 7.004 10.002 Fluka BS * 4.006 25 °C 6.984 8.957 Radiometer * 1.678 25 °C 4.005 7.000 9.180 Baker * 4.006 25 °C 6.991 10.008 Metrohm * 3.996...

  • Page 88: Calibration Interval

    Settings Multi 9420 Buffer set * pH values USABlueBook * 4.000 25 °C 7.000 10.000 YSI * 4.000 25 °C 7.000 10.000 * Brand names or trade names are trademarks of their respective owners protected by law. The buffers are selected in the menu, pH / <ENTER> / Calibration / Buffer (see section 9.1.1 S...

  • Page 89: Ise Measurement Settings

    Multi 9420 Settings Default settings are printed in bold. Menu item Possible setting Explanation mV resolution Resolution of the mV display Reset Resets all sensor settings to the delivery condition (see section 9.7.1 R ESETTING THE MEASUREMENT , page 97).
  • Page 90 Settings Multi 9420 Menu item Possible setting Description Man. temperature -25 ... +25 ... +130 °C Entry of the manually deter- mined temperature. For measurements without tem- perature sensor only. Alternative tempera- Takes the measured tem- ture perature value from an IDS sensor.
  • Page 91 Multi 9420 Settings ba75964e04 04/2015...

  • Page 92: Measurement Settings

    Settings Multi 9420 D.O. measurement settings 9.4.1 Settings for D.O. measurement The settings are available in the menu for measurement and calibration set- tings. To open the settings, display the required measured parameter in the measured value display and press the <ENTER> key. After completing the set- tings, switch to the measured value display with <M>.
  • Page 93 Multi 9420 Settings Menu item Possible Explanation setting Type Used measuring cell Measuring cells whose cell constant is determined by calibration in the KCl control standard solution. Calibration range: 0.450 to 0.500 cm The currently valid cell constant is dis- played in the status line.
  • Page 94 Settings Multi 9420 Setting menu of Menu item Possible Explanation LR 925/01 setting Cell constant 0.090 ..Display and setting options for the 0.100 ... cell constant 0.110 cm Temp. comp. (TC) / Procedure for temperature compen- Method sation (see section 8.2 T EMPERA , page 80).

  • Page 95: Sensor-Independent Settings

    Multi 9420 Settings Sensor-independent settings 9.6.1 System To open the Storage & config menu, press the <ENTER_> key in the measured value display. After completing the settings, switch to the measured value dis- play with <M>. Default settings are printed in bold.

  • Page 96: Data Storage

    Multi 9420 9.6.2 Data storage This menu contains all functions to display, edit and erase stored measured values. Detailed information on the memory functions of the Multi 9420 are given in section 10 D , page 101. ATA STORAGE 9.6.3 Automatic Stability control The automatic Stability control (AutoRead) function continuously checks the stability of the measurement signal.

  • Page 97: Reset

    Multi 9420 Settings Reset You can reset (initialize) all sensor settings and sensor-independent settings separately from each other. 9.7.1 Resetting the measurement settings The calibration data are reset to the default settings together with the measuring parameters. Recalibrate after performing a reset.
  • Page 98 Settings Multi 9420 The following settings for ISE measurements are reset to the default settings with the Reset function: Setting Default settings AutoRead criterion high Ion type Unit mg/l Man. temperature 25 °C Alternative temperature Method Standard addition The sensor settings are reset under the Reset menu item in the menu for cali- bration and measurement settings.
  • Page 99 Multi 9420 Settings Setting Default settings Reference temperature 25 °C Temperature coefficient (TC) of the 2.000 %/K linear temperature compensation Multiplier for TDS 1.00 The sensor settings are reset under the Reset menu item in the menu for cali- bration and measurement settings. To open the settings, display the required measured parameter in the measured value display and press the <ENTER>...

  • Page 100: Resetting The System Settings

    Settings Multi 9420 9.7.2 Resetting the system settings The following system settings can be reset to the default condition: Setting Default settings Language English Audio signal Baud rate 4800 Baud Output format ASCII Decimal separator Dot (xx.x) Brightness Temperature unit °C...

  • Page 101: Data Storage

    Multi 9420 Data storage Data storage You can transmit measured values (datasets) to the data storage:  Manual data storage (see section 10.1 M , page 101) ANUAL DATA STORAGE  Automatic data storage at intervals (see section 10.2 A...
  • Page 102 Data storage Multi 9420 Automatic data storage ID number Interval 30 s Duration 180 min continue 0d03h00min 1d17h33min 01.08.2013 08:00 1 Adjusted entire storage duration 2 Max. available storage duration 3 Graphical display of the storage usage Settings You can configure the automatic data storage function with the following...
  • Page 103 Multi 9420 Data storage Starting the To start the automatic storage function, select continue with <><> and con- automatic storage firm with <ENTER>. The meter switches to the measured value display. function 0d03h00min 03.04.2013 08:00 1 Remaining storage duration 2 Graphical display of the storage duration The active automatic data storage function can be recognized by the progress bar in the status line.

  • Page 104: Measurement Data Storage

    Data storage Multi 9420 10.3 Measurement data storage 10.3.1 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.

  • Page 105: Erasing The Measurement Data Storage

    Multi 9420 Data storage Display presentation Manual data storage 3 of 64 of a dataset 03.04.2013 11:24:16 ID number: 1 SenTix 940 B20294008565 pH 7.000 24.8 °C AR Sensor: +++ 01.08.2013 08:00 Sample printout 03.04.2013 09:56:20 Multi 9420 Ser. no. 09250023 SenTix 940 Ser.

  • Page 106: Storage Locations

    - 4 levels (+++, ++, +, -, or no evaluation) or - QSC (percentage) 10.3.4 Storage locations The Multi 9420 meter has two measurement data storages. The measured values recorded either manually or automatic are stored separately in indi- vidual measurement data storages.

  • Page 107: Transmitting Data

    Via the USB-A interface (USB Host) it is possible to transfer data to an external USB memory device/USB printer. 11.3 Connecting the PC / USB-B interface (USB Device) Connect the Multi 9420 to the PC via the USB-B interface. Installation of the System requirements of the PC for installation of the USB driver: USB driver on the ...

  • Page 108: Connecting A Usb Memory Device/Usb Printer

    – Stop bits: 2 11.4 Connecting a USB memory device/USB printer (USB-A interface (USB Host)) Connect the USB-A interface (USB Host) of the Multi 9420 to a USB flash drive/ USB printer. Connect a USB memory device/USB printer to the USB Host interface.

  • Page 109: Options For Data Transmission To The Usb-B (Pc) Interface And The Usb-A (Usb Printer) Interface

    Multi 9420 Transmitting data 11.5 Options for data transmission to the USB-B (PC) interface and the USB-A (USB printer) interface Via the USB-B interface you can transmit data to a PC. Via the USB-A interface, you can transmit data to a USB printer or USB mem- ory device.

  • Page 110: Data Transmission To The Usb-A Interface

    Transmitting data Multi 9420 11.6 Data transmission to the USB-A interface (USB memory device) Via the USB-A interface, you can transmit data to a USB memory or USB printer device. How to transmit data to a USB printer device is described in an extra section (see section 11.6 D...

  • Page 111: Maintenance, Cleaning, Disposal

    See the relevant operating manuals of the IDS sensors for instruc- tions on maintenance. 12.1.2 Exchanging the battery The Multi 9420 has a battery (CR2032 type) to buffer the system clock in case of a power failure. To retain the current setting of the date and time during the battery exchange, supply the meter with power with the power pack while changing the battery.

  • Page 112: Cleaning

    Maintenance, cleaning, disposal Multi 9420 Open the battery compartment (1) on the underside of the meter. Remove the battery from the battery compartment. Insert a new battery in the battery compartment. Close the battery compartment (1). The date (day) flashes on the display.
  • Page 113 Multi 9420 Maintenance, cleaning, disposal ba75964e04 04/2015...

  • Page 114: What To Do If

    What to do if... Multi 9420 What to do if... 13.1 pH More information and instructions on cleaning and exchange of sensors are given in the documentation of your sensor. Error message Cause Remedy OFL, UFL IDS pH sensor: – Measured value outside the measur- –...
  • Page 115 Multi 9420 What to do if... No stable measured Cause Remedy value IDS pH sensor: – Diaphragm contaminated – Clean diaphragm – Membrane contaminated – Clean membrane Test sample: – pH value not stable – Measure with air excluded if necessary –...

  • Page 116: Ise

    What to do if... Multi 9420 13.2 ISE Error message OFL Cause Remedy – Measuring range exceeded – Dilute the test sample Obviously incorrect Cause Remedy measured values – Electrode not connected – Connect the electrode – Cable broken – Replace the electrode...

  • Page 117: Dissolved Oxygen

    Multi 9420 What to do if... 13.3 Dissolved oxygen More information and instructions on cleaning and exchange of sensors are given in the documentation of your sensor. Error message, Cause Remedy – Measured value outside the measur- – Select a suitable measuring...

  • Page 118: General Information

    What to do if... Multi 9420 13.5 General information Sensor symbol Cause Remedy flashes – Calibration interval expired – Recalibrate the measuring sys- Meter does not react Cause Remedy to keystroke – Operating condition undefined or – Processor reset: EMC load unallowed Press the <ENTER>...
  • Page 119 Multi 9420 What to do if... Data transmission to Cause Remedy USB printer does not – The USB-B interface is connected to – Disconnect the PC from the work a PC USB-B interface – Connected USB memory device – Use a suitable USB printer (see does not work section 11.4 C...

  • Page 120: Technical Data

    Technical data Multi 9420 Technical data 14.1 Measuring ranges, resolution, accuracy Measuring ranges, Parameter Measuring range Accuracy accuracy Air pressure (abso- 300 ... 1100 mbar ± 43 mbar lute)* *Available only if a D.O. sensor is connected Further data are given in the documentation of your sensor.
  • Page 121 Multi 9420 Technical data Handshake RTS/CTS Cable length Max. 3 m USB interface (host) Type USB 2.0 USB-A (host), USB device Guidelines EC directive 2004/108/EC and norms used EN 61326-1 EN 61000-3-2 EN 61000-3-3 FCC Class A Meter safety EC directive 2006/95/EC...
  • Page 122 Technical data Multi 9420 Keypad (antibacterial) Autotype International Limited Client: Job Ref: 04I0712 Grove Road Sample Ref No.: LSN 25/71815 Wantage Date Received: Oxon 15/07/2004 OX12 7B2 Date Reported: 03/03/2005 United Kingdom CERTIFICATE OF ANALYSIS AUTOTEX AM FILM TEST Supplier: AUTOTYPE Meth.
  • Page 123 Multi 9420 Technical data Autotype International Limited Client: Job Ref: 05B1760 Grove Road Sample Ref No.: LSN 26/38123 Wantage Date Received: Oxon 24/10/2004 OX12 7B2 Date Reported: 21/02/2005 United Kingdom CERTIFICATE OF ANALYSIS AUTOTEX AM AGED 15 YEARS Harmonised JIS Z2801/AATCC 100 Meth.

  • Page 124: Firmware Update

     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 9420). Install the downloaded firmware update on a PC.

  • Page 125: Firmware-Update For Ids Sensors

    IDS sensor to the newest version. You can find available firmware update files for your IDS sensor on the Internet. For updating, connect the IDS sensor to the Multi 9420, and the Multi 9420 to a PC. For the update via the USB-B interface, the following is required: ...

  • Page 126: Glossary

    Glossary Multi 9420 Glossary pH/ORP/ISE Asymmetry see zero point Electromotive force of The electromotive force U of the combination electrode is the measur- a combination able electromotive force of an electrode in a solution. It equals the sum electrode of all the galvanic voltages of the combination electrode. Its depen- dency on the pH results in the electrode function, which is characterized by the parameters, slope and zero point.
  • Page 127 Pressure caused by the oxygen in a gas mixture or liquid. D.O. % saturation Short name for the relative D.O. saturation. ® OxiCal WTW name for a procedure to calibrate D.O. measuring systems in water vapor saturated air. Salinity The absolute salinity S of seawater corresponds to the relationship of the mass of dissolved salts to the mass of the solution (in g/Kg).
  • Page 128 Glossary Multi 9420 Calibration Comparing the value from a measuring system (e. g. the displayed value) to the correct value or a value that is regarded as correct. Often, this expression is also used when the measuring system is adjusted at the same time (see adjusting).

  • Page 129: Index

    Multi 9420 Index Index Air calibration beaker ....73 Keys ......14 AutoRead .
  • Page 130 Index Multi 9420 Standard addition ....57 Standard addition with blank value correction ....66 Standard subtraction .
  • Page 132 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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