wtw pH/ION 7320P Operating Manual
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wtw pH/ION 7320P Operating Manual

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OPERATING MANUAL
ba75935e04 12/2017
pH/ION 7320P
pH/ION 7320
pH/ION 7320 (P)
PH/ION METER

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Summary of Contents for wtw pH/ION 7320P

  • Page 1 OPERATING MANUAL ba75935e04 12/2017 pH/ION 7320P pH/ION 7320 pH/ION 7320 (P) PH/ION METER...
  • Page 2 pH/ION 7320 Copyright © 2017 Xylem Analytics Germany GmbH Printed in Germany. ba75935e04 12/2017...

  • Page 3: Table Of Contents

    7320 meter ........7 pH/ION 7320P meter ....... . . 8 Sensors .
  • Page 4 Contents pH/ION 7320 5.4.4 Elements in menus and dialogs ....21 5.4.5 Example 1 on navigation: Setting the language ..23 5.4.6 Example 2 on navigation: Setting the date and time .
  • Page 5 pH/ION 7320 Contents Sensor-independent settings ......75 9.3.1 System ........75 9.3.2 Data storage .
  • Page 6 Contents pH/ION 7320 ba75935e04 12/2017...

  • Page 7: Overview

    pH/ION 7320 Overview Overview pH/ION 7320 meter The compact precision pH meter pH/ION 7320 enables you to carry out pH measurements, ORP measurements and ion selective measurements quickly and reliably. The pH/ION 7320 provides the maximum degree of operating comfort, reliabil- ity and measuring certainty for all applications.

  • Page 8: Ph/Ion 7320P Meter

    A measuring system ready to measure consists of the pH/ION 7320 meter and a suitable sensor. Suitable sensors are pH electrodes, ORP electrodes and ion selective elec- trodes (ISE). Information on available sensors is given on the Internet and in the WTW catalog, "Laboratory and field instrumentation". ba75935e04 12/2017...

  • Page 9: Safety

    pH/ION 7320 Safety 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 10: Safe Operation

    Safety pH/ION 7320 Safe operation 2.2.1 Authorized use This meter is authorized exclusively for pH, ORP and ISE concentrations measurements in the laboratory. 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 94).

  • Page 11: Commissioning

    pH/ION 7320 Commissioning Commissioning Scope of delivery  pH meter pH/ION 7320  4 batteries 1.5 V Mignon type AA  Power pack  USB cable (A plug on mini B plug)  Stand  Stand holder  Comprehensive operating manual ...

  • Page 12: Inserting The Batteries

    Commissioning pH/ION 7320 3.3.1 Inserting the batteries You can operate the meter either with normal batteries or with rechargeable batteries (Ni-MH). In order to charge the batteries, an external charging device is required. 1 Battery compartment Open the battery compartment (1) on the underside of the meter. CAUTION Make sure that the poles of the batteries are positioned cor- rectly.

  • Page 13: Connecting The Power Pack

    pH/ION 7320 Commissioning 3.3.2 Connecting the power pack CAUTION The line voltage at the operating site must lie within the input voltage range of the original power pack (see section 14 T , page 94). NICAL DATA CAUTION Use original power packs only (see section 14 T ECHNICAL DATA page 94).

  • Page 14: Printer (Only Ph/Ion 7320 P)

    Printer (only pH/ION 7320 P) pH/ION 7320 Printer (only pH/ION 7320 P) 1 Operating LED – Is illuminated: Printer is switched on – Flashes: Printer is switched off 2 Control panel with the keys <FEED> and <ON/OFF> 3 Lever to open the paper compartment 4 Lid of the paper compartment Commissioning / switching the printer on or off Switching on the...

  • Page 15: Operation / Printing

    pH/ION 7320 Printer (only pH/ION 7320 P) Operation / printing Data are only output to the printer if the following requirements are met  Data are transmitted manually or automatically (see section 11.1 O PTIONS , page 84) FOR DATA TRANSMISSION ...

  • Page 16: What To Do If

    Printer (only pH/ION 7320 P) pH/ION 7320 Use original WTW rolls of paper only. You will find information on this in the WTW catalog L ABORATORY or on the Internet. IELD NFORMATION The thermal paper will remain legible for at least 7 years if stored appropriately.

  • Page 17: Operation

    pH/ION 7320 Operation Operation General operating principles 5.1.1 Keypad In this operating manual, keys are indicated by brackets <..> . The key symbol (e.g. <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.

  • Page 18: Display

    Operation pH/ION 7320 5.1.2 Display 6.093 25.0 °C AutoCal HOLD AR 12.12.2012 USB output 12:12 1 Status information (sensor) 2 Measured value (with unit) 3 Measured parameter 4 Continuous measurement control (CMC function) 5 Channel display: Plug position of the sensor 6 Sensor symbol (calibration evaluation, calibration interval) 7 Measured temperature (with unit) 8 Status information (meter)

  • Page 19: Socket Field

    pH/ION 7320 Operation 5.1.4 Socket field 1 pH electrode or ion selective electrode 1 2 Reference electrode 1 3 Temperature sensor 1 4 pH electrode or ion selective electrode 2 5 Reference electrode 2 6 Temperature sensor 2 7 Mini USB-B interface 8 Power pack 9 Service interface CAUTION...

  • Page 20: Switching Off

    Operation pH/ION 7320 6.949 25.0 °C 12.12.2012 USB output 12:12 Switching off Switch the meter off with <On/Off>. Automatic switch-off The instrument has an automatic switch-off function in order to save the batteries (see section 9.3.1 S , page 75). The automatic switchoff YSTEM switches off the measuring instrument if no key is pressed for an adjustable period.

  • Page 21: Measured Value Display

    pH/ION 7320 Operation Operating Description mode Measuring The measurement data of the connected sensor are shown in the measured value display Calibration The course of a calibration with calibration information, func- tions and settings is displayed Storage in The meter stores measuring data automatically or manually memory Transmit- The meter transmits measuring data and calibration records...
  • Page 22 Operation pH/ION 7320 System General Interface Clock Service information Reset 12.12.2012 Back 12:12  Settings Settings are indicated by a colon. The current setting is displayed on the right-hand side. The setting mode is opened with <MENU/ENTER>. Subse- quently, the setting can be changed with <><> and <MENU/ENTER>. Example: General Language:...

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

    pH/ION 7320 Operation Calibration record Calibration data storage Serial number (sensor) Buffer One point calibration Calibration interval Unit for slope mV/pH ] 2.00 4.01 7.00 10.01 (25 °C) 12.12.2012 Back 12:12 5.4.5 Example 1 on navigation: Setting the language Press the <On/Off> key. The measured value display appears.
  • Page 24 Operation pH/ION 7320 System General Interface Clock Service information Reset 12.12.2012 Back 12:12 Select the General submenu with <><>. The current selection is displayed with a frame. Open the General submenu with <MENU/ENTER>. General Language: Deutsch Beep Illumination Contrast 50 % Switchoff time Temperature unit °C...

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

    pH/ION 7320 Operation 5.4.6 Example 2 on navigation: Setting the date and time The measuring instrument has a clock with a date function. The date and time are shown in the measured value display. When storing measured values and calibrating, the current date and time are automatically stored as well.
  • Page 26 Operation pH/ION 7320 If necessary, set the Date and Date format. The setting is made similarly to that of the time. To make further settings, switch to the next higher menu level with [Back]<F1>. Switch to the measured value display with <M>. The instrument is in the measuring mode.

  • Page 27: Channel Display

    pH/ION 7320 Operation Channel display The pH/ION 7320 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 filled bar indicates for 6.949 each connected sensor to which plug position of the 24.8 °C meter it is connected.

  • Page 28: Ph Value

    pH value pH/ION 7320 pH value Measuring 6.1.1 Measuring the pH value NOTE When connecting an earthed PC/printer, measurements cannot be performed in earthed media as the values would be incorrect. The USB interface is not galvanically isolated. To ensure the high measurement accuracy of the measuring sys- tem, always measure with a calibrated electrode (see section 6.2 , page 31).
  • Page 29 pH/ION 7320 pH value 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. Using <ENTER>, activate the Stability control function manually.

  • Page 30: Measuring The Temperature

    pH value pH/ION 7320 6.1.2 Measuring the temperature For reproducible pH measurements, it is essential to measure the temperature of the test sample. You have the following options to measure the temperature:  Automatic measurement of the temperature with the temperature sensor (NTC 30 or Pt 1000) integrated in the sensor.

  • Page 31: Calibration

    pH/ION 7320 pH value Calibration 6.2.1 Why calibrate? pH electrodes age. This changes the zero point (asymmetry) and slope of the pH electrode. As a result, an inexact measured value is displayed. Calibration determines and stores the current values of the zero point and slope of the electrode.
  • Page 32 pH value pH/ION 7320 Buffer -180.0 24.8 °C AutoCal TEC 12.12.2012 12:12 Thoroughly rinse the electrode with deionized water. Immerse the electrode in the first buffer solution. When measuring without temperature sensor: Enter the temperature of the buffer with <><>. Start the measurement with <ENTER>.
  • Page 33 pH/ION 7320 pH value 1 4 . Start the measurement with <ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. A progress bar is displayed and the display of the measured parameter flashes. 7.000 Buffer 24.8...

  • Page 34: Manual Calibration (Concal)

    pH value pH/ION 7320 2 1 . 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). 2 2 .
  • Page 35 pH/ION 7320 pH value 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. A progress bar is displayed and the display of the measured parameter flashes.
  • Page 36 pH value pH/ION 7320 1 4 . Immerse the electrode in the second buffer solution. 1 5 . When measuring without temperature sensor: Enter the temperature of the buffer with <><>. 1 6 . Start the measurement with <ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed.

  • Page 37: Calibration Points

    pH/ION 7320 pH value Buffer 9.958   24.8 °C ConCal 12.12.2012 12:12 2 6 . Set the nominal buffer value for the measured temperature with <><>. 2 7 . Accept the set calibration value with <ENTER>. The calibration display for the next buffer appears (voltage display). 2 8 .

  • Page 38: Calibration Data

    pH value pH/ION 7320 6.2.6 Calibration data The calibration record is automatically transmitted to the interface after calibrating. Displaying the The calibration record of the last calibration is to be found under the menu item, calibration data <MENU/ENTER> / Calibration / / Calibration record. To open it, press the <CAL__>...
  • Page 39 pH/ION 7320 pH value Display Calibration Zero point Slope record [mV] [mV/pH] - 15 ... + 15 -60.5 ... -58.0 - 20 ... <-15 >-58.0 ... -57.0 >+15 ... + 20 - 25 ... <- 20 -61.0 ... <-60.5 >+ 20 ... + 25 >-57.0 ...

  • Page 40: Continuous Measurement Control (Cmc Function)

    pH value pH/ION 7320 6.2.7 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 41: Orp Voltage

    pH/ION 7320 ORP voltage ORP voltage Measuring 7.1.1 Measuring the ORP NOTE When connecting an earthed PC/printer, measurements cannot be performed in earthed media as the values would be incorrect. The USB interface is not galvanically isolated. Connect the ORP electrode to the meter. If necessary, select the U (mV) display with <M>.
  • Page 42 ORP voltage pH/ION 7320 Measured parame- Time interval Stability in the time interval ORP voltage 15 seconds ∆ : better than 0.3 mV Temperature 15 seconds ∆ : better than 0.5 °C The minimum duration until a measured value is assessed as stable is the monitored time interval.

  • Page 43: Measuring The Relative Orp

    pH/ION 7320 ORP voltage Release the frozen measured value again with <AR>. The HOLD function is switched off. The [HOLD] status display disappears. 7.1.2 Measuring the relative ORP To measure the difference of the ORPs of two solutions, you have to define the ORP of one solution as the zero point first.

  • Page 44: Measuring The Temperature

    ORP voltage pH/ION 7320 Measured parame- Time interval Stability in the time interval 15 seconds ∆ : better than 0.3 mV Temperature 15 seconds ∆ : better than 0.5 °C The minimum duration until a measured value is assessed as stable is the monitored time interval.

  • Page 45: Ion Concentration

    pH/ION 7320 Ion concentration Ion concentration Measuring 8.1.1 Measuring the ion concentration NOTE When connecting an earthed PC/printer, measurements cannot be performed in earthed media as the values would be incorrect. The USB interface is not galvanically isolated. Incorrect calibration of ion selective electrodes will result in incor- rect measured values.
  • Page 46 Ion concentration pH/ION 7320  as soon as the measured value is outside the stability range  when the automatic Stability control is switched off. You can activate or switch off the automatic Stability control function (see section 9.3.1 S , page 75).

  • Page 47: Measuring The Temperature

    pH/ION 7320 Ion concentration 8.1.2 Measuring the temperature For reproducible ion-selective measurements, it is essential to measure the temperature of the test sample. You have the following options to measure the temperature:  Measurement by an external temperature sensor.  Manual determination and input of the temperature. The measuring instrument recognizes whether a suitable sensor is connected and automatically switches on the temperature measurement.

  • Page 48: Calibration

    Ion concentration pH/ION 7320 Calibration 8.2.1 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 49 pH/ION 7320 Ion concentration Thoroughly rinse the electrode with distilled water. Immerse the electrode in standard solution 1. When calibrating without temperature sensor:  Measure the temperature of the standard solution using a thermom- eter.  Use <F2>/[ T ⇅ C ] to select the setting of the temperature. ...
  • Page 50 Ion concentration pH/ION 7320 When calibrating without temperature sensor:  Measure the temperature of the standard solution using a thermom- eter.  Use <F2>/[ T ⇅ C ] to select the setting of the temperature.  Use <> <> to set the temperature. ...

  • Page 51: Calibration Standards

    pH/ION 7320 Ion concentration 8.2.4 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. Standard solution (Std 1 - 7) Values Unit [mg/l]...
  • Page 52 Ion concentration pH/ION 7320 Menu item Setting/func- Description tion Calibration / Displays the calibration record. Calibration data stor- age /Display Further options:  Scroll through the calibration records with <><>.  Output the displayed calibra- tion record to the interface with <F2>/[USB output].

  • Page 53: Selecting The Measuring Method

    pH/ION 7320 Ion concentration 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. If necessary, select the ISE display (unit, mg/l) with <M>.

  • Page 54: Standard Addition

    Ion concentration pH/ION 7320 8.3.1 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 8.3 S ELECTING THE MEASUR , page 53).
  • Page 55 pH/ION 7320 Ion concentration Select Continue with <> <> and start the measurement with <MENU/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 12.12.2012 Back 12:12 Add the standard solution to the sample.

  • Page 56: Standard Subtraction

    Ion concentration pH/ION 7320 8.3.2 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. Select the measuring method (see section 8.3 S ELECTING THE MEASUR , page 53).
  • Page 57 pH/ION 7320 Ion concentration Using <> <> and <MENU/ENTER>, select the values for the vol- ume of the sample (Sample volume) and the volume of the ISA/TISAB solution (ISA/TISAB vol.). Select Continue with <> <> and start the measurement with <MENU/ENTER>.
  • Page 58 Ion concentration pH/ION 7320 Confirm Yes with <MENU/ENTER>. Measurement with the selected method is completed. ba75935e04 12/2017...

  • Page 59: Sample Addition

    pH/ION 7320 Ion concentration 8.3.3 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 8.3 S ELECTING THE MEASUR , page 53).
  • Page 60 Ion concentration pH/ION 7320 Select Continue with <> <> and start the measurement with <MENU/ENTER>. When the measurement is finished an entry window appears. Sample addition Add sample! Sample volume 1.0 ml Continue 12.12.2012 Back 12:12 Add the sample to the standard solution. Using <>...

  • Page 61: Sample Subtraction

    pH/ION 7320 Ion concentration 8.3.4 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. The sample subtraction is one method for the indirect determination of ions.
  • Page 62 Ion concentration pH/ION 7320 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 12.12.2012 Back 12:12 Prepare the standard solution. If necessary, add the ISA/TISAB solution to the standard solution.

  • Page 63: Standard Addition With Blank Value Correction (Blank Value Addition)

    pH/ION 7320 Ion concentration Sample subtraction 0.321 mg/l 24.8 °C 12.12.2012 USB output 12:12 If necessary, start measuring further samples with <MENU/ENTER>. Repeat steps 8 - 16 for all samples. Terminate the measuring method with <M>. A safety query appears. Select Yes with <>...
  • Page 64 Ion concentration pH/ION 7320 CALIBRATION 12.12.2012 12:12:12 #1 0.010 mg/l 20.2 mV 25.0 °C #2 0.100 mg/l 79.2 mV 25.0 °C Slp.: 59.0 mV Sensor +++ (Ion type: Ag) 12.12.2012 Continue USB output 12:12 Measuring Start the measurement with <F1> Continue An entry window appears.
  • Page 65 pH/ION 7320 Ion concentration Add the standard solution to the sample. Using <> <> and <MENU/ENTER>, enter the values for the vol- ume of the standard solution (Std. volume) and concentration of the standard solution (Std. conc.). Select Continue with <> <> and start the measurement with <MENU/ENTER>.

  • Page 66: Settings

    Settings pH/ION 7320 Settings Measurement settings 9.1.1 Settings for pH measurements The settings for pH measurements are made in the menu for calibration and measurement settings of the pH/ORP measurement. To open the settings, dis- play the required measured parameter in the measured value display and press the <MENU/ENTER>...
  • Page 67 pH/ION 7320 Settings Menu item Possible set- Description ting Calibration/ Entry of the series number of the Serial number (sen- connected sensor. sor) The series number is output in the calibration record.  Change the contents of the high- lighted position with <><>. ...

  • Page 68: Buffer Sets For Calibration

    Buffer set * pH values ConCal NIST/DIN 1.679 25 °C DIN buffers according to DIN 19266 4.006 and NIST Traceable Buffers 6.865 9.180 12.454 2.000 25 °C WTW Technical buffers 4.010 7.000 10.011 ba75935e04 12/2017...
  • Page 69 pH/ION 7320 Settings 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 25 °C 7.000...
  • Page 70 Settings pH/ION 7320 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 4.010...

  • Page 71: Calibration Interval

    pH/ION 7320 Settings 9.1.3 Calibration interval The calibration evaluation is displayed as a sensor symbol. The sensor symbol flashes after the adjusted calibration interval has expired. It is still possible to measure. To ensure the high measuring accuracy of the measuring system, calibrate after the calibration interval has expired.

  • Page 72: Settings For Orp Measurements

    Settings pH/ION 7320 9.1.4 Settings for ORP measurements The settings for ORP measurements are made in the menu for calibration and measurement settings of the pH/ORP measurement. To open the settings, dis- play the required measured parameter in the measured value display and press the <MENU/ENTER>...

  • Page 73: Settings For Ise Measurements

    pH/ION 7320 Settings Settings for ISE measurements The settings are made in the measuring menu of the ISE measurement. To open the settings, activate the relevant measuring window in the measured value display and press the <MENU/ENTER> key shortly. After completing the settings, switch to the measured value display with <M>.
  • Page 74 Settings pH/ION 7320 Menu item Possible setting Description Alternative tempera- Takes the temperature ture value from the 2nd sensor. Man. temperature -25 ... +25 ... +130 °C Entry of the manually deter- mined temperature. For measurements without tem- perature sensor only. ISE setup / Selection of the AutoRead AutoRead criterion...

  • Page 75: Sensor-Independent Settings

    pH/ION 7320 Settings Sensor-independent settings 9.3.1 System 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 Possible set- Description...

  • Page 76: Data Storage

    Settings pH/ION 7320 Menu item Possible set- Description ting System / Printer Settings for the integrated printer of the pH/ION 7320P. For details, see section 4 H/ION 7320 RINTER ONLY P P), page 14 System /Clock Date format Time and date settings (see Datum section 5.4.6 E...

  • Page 77: Resetting The System Settings

    pH/ION 7320 Settings Setting Default settings Resolution mV Asymmetry 0 mV Slope -59.2 mV Man. temperature 25 °C One point calibration Stability control Temperature unit °C The sensor settings are reset under the Reset menu item in the menu for cali- bration and measurement settings.

  • Page 78: Data Storage

    Data storage pH/ION 7320 Data storage You can transmit measured values (datasets) to the data storage:  Manual data storage (see section 10.1 M , page 78) ANUAL DATA STORAGE  Automatic storage at intervals (see section 10.2 A UTOMATIC DATA STORAGE , page 79) AT INTERVALS With each data storage process, the current datasets of the sensors indicated...

  • Page 79: Automatic Data Storage At Intervals

    pH/ION 7320 Data storage Warning Data storage full. Erase? 12.12.2012 Back 12:12 You have the following options:  To erase the entire storage, confirm Yes.  To cancel the storage process and switch to the measured value display, confirm No. Then you can e.g. transmit the stored data to a PC (see section 10.3.1 E , page 81) and subse- DITING THE MEASUREMENT DATA STORAGE...
  • Page 80 Data storage pH/ION 7320 Settings You can configure the automatic data storage function with the following settings: Menu item Possible set- Description ting ID number 1 ... 10000 ID number for the dataset series. Interval 1 s, 5 s, 10 s, Storage interval.

  • Page 81: Measurement Data Storage

    pH/ION 7320 Data storage Energy saving mode If the automatic storing function is active, the meter provides an energy saving ([Eco mode]) mode ([Eco mode]) to avoid unnecessary energy consumption. The energy saving mode switches off functions of the meter that are not required for the automatic storage of measurement data (such as the display).
  • Page 82 Data storage pH/ION 7320 Settings Menu item Setting/ Description function Data storage / Displays all measurement datasets Manual data storage page by page. / Display Further options:  Scroll through the datasets with <><>.  Output the displayed dataset to the interface with <F2>/[USB output].

  • Page 83: Erasing The Measurement Data Storage

    pH/ION 7320 Data storage Quitting the display To quit the display of stored measurement datasets, you have the following options:  Switch directly to the measured value display with <M>.  Quit the display and move to the next higher menu level with <F1>/[Back]. 10.3.2 Erasing the measurement data storage Erasing the measurement data storage (see section 10.3.1 E DITING THE...

  • Page 84: Transmitting Data (Usb Interface)

    pH/ION 7320 Transmitting data (USB interface) Transmitting data (USB interface) 11.1 Options for data transmission Via the USB interface you can transmit data to a PC. The following table shows which data are transmitted to the interface in which way: Data Control Operation / description...

  • Page 85: Connecting A Pc

    pH/ION 7320 Transmitting data (USB interface) 11.2 Connecting a PC Connect the pH/ION 7320 to the PC via the USB interface. NOTE When connecting an earthed PC/printer, measurements cannot be performed in earthed media as the values would be incorrect. The USB interface is not galvanically isolated.
  • Page 86 Transmitting data (USB interface) pH/ION 7320 ba75935e04 12/2017...

  • Page 87: Maintenance, Cleaning, Disposal

    pH/ION 7320 Maintenance, cleaning, disposal Maintenance, cleaning, disposal 12.1 Maintenance 12.1.1 General maintenance activities The only maintenance activity required is replacing the batteries. See the relevant operating manuals of the electrodes for instruc- tions on maintenance. 12.1.2 Replacing the batteries You can operate the meter either with normal batteries or with rechargeable batteries (Ni-MH).

  • Page 88: Cleaning

    Maintenance, cleaning, disposal pH/ION 7320 Close the battery compartment (1). Set the date and time (see section 5.4.6 E XAMPLE ON NAVIGATION , page 25) ETTING THE DATE AND TIME When the batteries are nearly discharged, the status indi- cator is displayed. Dispose of used batteries according to the local regulations of your country.

  • Page 89: What To Do If

    pH/ION 7320 What to do if... What to do if... 13.1 pH/ORP More information and instructions on cleaning and exchange of sensors are given in the documentation of your sensor. Error message The measured value is outside the measuring range. OFL, UFL Cause Remedy...
  • Page 90 What to do if... pH/ION 7320 No stable measured Cause Remedy value pH electrode: – Junction contaminated – Clean the junction – Membrane contaminated – Clean the membrane Test sample: – pH value not stable – Measure with air excluded if necessary –...

  • Page 91: Ise

    pH/ION 7320 What to do if... 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 Error message, Cause Remedy...
  • Page 92 What to do if... pH/ION 7320 ba75935e04 12/2017...

  • Page 93: General Information

    pH/ION 7320 What to do if... 13.3 General information Sensor symbol Cause Remedy flashes – Calibration interval expired – Recalibrate the measuring system Cause Remedy display – Batteries almost empty – Replace the batteries (see section 12.1 M AINTENANCE page 87) Meter does not react Cause Remedy...

  • Page 94: Technical Data

    Technical data pH/ION 7320 Technical data 14.1 Measuring ranges, resolution, accuracy 14.1.1 pH/ORP Measuring ranges, Parameter Measuring range Resolution resolution -2.0 ... +20.0 -2.00 ... +20.00 0.01 - 2.000 ... + 19.999 0.001 U [mV] -1200.0 ... +1200.0 -2500 ... +2500 T [°C] -5.0 ...

  • Page 95: Ise

    pH/ION 7320 Technical data 14.1.2 ISE Measuring ranges, Parameter Measuring range Resolution resolution ISE [mg/l] 0.000 ... 9.999 0.001 10.00 ... 99.99 0.01 100.0 ... 999.9 1000 ... 999999 ISE [µmol/l] 0.000 ... 9.999 0.001 10.00 ... 99.99 0.01 100.0 ... 999.9 1000 ...

  • Page 96: General Data

    Technical data pH/ION 7320 14.2 General data Dimensions pH/ION 7320: Approx. 230 x 190 x 80 mm pH/ION 7320 P: Approx. 280 x 230 x 80 mm Weight pH/ION 7320: Approx. 0.8 kg pH/ION 7320 P: Approx. 1.0 kg Mechanical structure Type of protection IP 43 Electrical safety...
  • Page 97 pH/ION 7320 Technical data 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 EN 60529 FCC Class A Equipment Statement Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.

  • Page 98: Firmware Update

    Firmware update pH/ION 7320 Firmware update Available firmware updates are provided on the Internet. With the firmware update program and a PC you can update the firmware of the pH/ION 7320 to the newest version. For the update you have to connect the meter to a PC. For the update via the USB interface, the following is required: ...

  • Page 99: Glossary

    pH/ION 7320 Glossary Glossary pH/ORP/ISE Asymmetry see zero point Electromotive force of The electromotive force U of the electrode is the measurable electromo- a electrode tive force of an electrode in a solution. It equals the sum of all the gal- vanic voltages of the electrode.
  • Page 100 Glossary pH/ION 7320 Measured value The measured value is the special value of a measured parameter to be determined. It is given as a combination of the numerical value and unit (e. g. 3 m; 0.5 s; 5.2 A; 373.15 K). Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g sol- vent.

  • Page 101: Index

    pH/ION 7320 Index Index Measurement data storage Edit ......81 Automatic switch-off ....20 Erase .
  • Page 102 Index pH/ION 7320 Temperature measurement ISE ......47 pH ......30, 44 Three-point calibration ISE .
  • Page 104 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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