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Metrohm 848 Titrino plus Manual

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848 Titrino plus
Manual
8.848.8008EN / 2015-01-19

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Summary of Contents for Metrohm 848 Titrino plus

  • Page 1 848 Titrino plus Manual 8.848.8008EN / 2015-01-19...
  • Page 3 Metrohm AG CH-9100 Herisau Switzerland Phone +41 71 353 85 85 Fax +41 71 353 89 01 info@metrohm.com www.metrohm.com 848 Titrino plus Manual 8.848.8008EN / 2015-01-19 jb/ebe...
  • Page 4 Technische Dokumentation Metrohm AG CH-9100 Herisau techdoc@metrohm.com This documentation is protected by copyright. All rights reserved. This document has been prepared with great care. However, errors can never be entirely ruled out. Please send comments regarding possible errors to the address above.

  • Page 5: Table Of Contents

    Monotonic equivalence point titration (MET) ....17 Endpoint titration (SET) ............. 18 5 Operation Switching the instrument on and off ....... 19 Fundamentals of operation ..........20 5.2.1 The keypad ................20 5.2.2 Structure of the dialog windows ..........21 ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 6 Editing the sensor data ............56 Managing solutions ............58 6.3.1 General ................. 58 6.3.2 Editing the solution data ............58 Managing common variables ..........60 6.4.1 General ................. 60 6.4.2 Editing common variables ............61 File management ..............62 ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 7 (CAL) ............110 7.4.1 Calibration parameters ............110 7.4.2 Buffers ................. 112 7.4.3 Reports ................113 8 Operation and maintenance Quality management and qualification with Metrohm 114 9 Troubleshooting SET titration ..............115 Miscellaneous ..............116 ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 8 Status diagram of the remote interface ........ 124 10.7 Remote control via an RS-232 connection ..... 125 10.7.1 Commands and variables ............. 126 10.8 Arithmetic algorithms in the 848 Titrino plus ....127 11 Technical specifications 11.1 Measuring inputs .............. 130 11.1.1 Potentiometry ..............
  • Page 9 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures Table of figures Figure 1 Front 848 Titrino plus ................ 7 Figure 2 Rear 848 Titrino plus ................. 8 Figure 3 Connecting pH or redox electrodes ........... 9 Figure 4 Connecting a reference electrode ............ 10 Figure 5 Connecting a temperature sensor ............

  • Page 11: Introduction

    1 Introduction Instrument description The 848 Titrino plus is a titrator for volumetric titrations for universal appli- cations. Methods can be created and saved under a new name. The meth- ods can be exported to a connected USB flash drive. This function allows you to copy methods quickly and easily from one device to another.

  • Page 12: Connectors

    1.1.3 Intended use The 848 Titrino plus is designed for usage as a titrator in analytical labora- tories. Its main application field is volumetric titration. This instrument is suitable for processing chemicals and flammable sam- ples.

  • Page 13: Symbols And Conventions

    WARNING This symbol draws attention to a possible biological hazard. CAUTION This symbol draws attention to possible damage to instruments or instrument parts. NOTE This symbol highlights additional information and tips. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 14: Safety Instructions

    The electrical safety when working with the instrument is ensured as part of the international standard IEC 61010. WARNING Only personnel qualified by Metrohm are authorized to carry out service work on electronic components. WARNING Never open the housing of the instrument. The instrument could be damaged by this.

  • Page 15: Tubing And Capillary Connections

    Recycling and disposal This product is covered by European Directive 2002/96/EC, WEEE – Waste from Electrical and Electronic Equipment. The correct disposal of your old equipment will help to prevent negative effects on the environment and public health. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 16 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1.3 Safety instructions More details about the disposal of your old equipment can be obtained from your local authorities, from waste disposal companies or from your local dealer. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 17: Overview Of The Instrument

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Overview of the instrument 2 Overview of the instrument Figure 1 Front 848 Titrino plus Piston rod Contact pins Of the dosing drive. For the data chip. Coupling Display For switching the flat stopcock. Keypad ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 18: Figure 2 Rear 848 Titrino Plus

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Figure 2 Rear 848 Titrino plus Electrode connector (Ind.) Type plate For connecting pH or redox electrodes with Contains specifications concerning mains integrated or separate reference electrode. voltage and serial number. Socket F. Electrode connector (Ref.) Mains connection socket For connecting reference electrodes.

  • Page 19: Installation

    The instrument should be protected against excessive temperature fluctu- ations and direct sunlight. Connecting a sensor Connecting pH or redox electrodes Figure 3 Connecting pH or redox electrodes ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 20: Figure 4 Connecting A Reference Electrode

    The red plug must always be plugged into the red socket at the temper- ature sensor for the purpose of shielding against disruptions. If you use an electrode with an integrated NTC probe, then you must plug the red plug into the red socket. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 21: Connecting A Stirrer

    You can connect the following stirrers: 801 Stirrer ￭ 803 Ti Stand ￭ 804 Ti Stand (requires rod stirrer) ￭ Figure 7 Connecting a stirrer CAUTION Make sure that the flat side of the plug matches the marking on the socket. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 22: Connecting A Balance

    Connecting a balance When a 6.2151.020 USB cable is used, then the 6.2148.030 RS-232/USB Box can be connected to the 848 Titrino plus by means of a USB hub or a 6.2151.100 adapter (see Chapter 3.5, page 12). Connect the 9-pin plug of the respective balance connecting cable to the RS 232/1 connector.

  • Page 23: Figure 9 Connecting Usb Devices

    USB hubs are available in specialty stores in a number of differ- ent models. The USB (OTG) connector of the 848 Titrino plus has no such hub. The 6.2147.000 numerical USB keypad has a USB hub and two USB con- nectors.

  • Page 24: Figure 10 Connecting The Usb Stick

    If you wish to connect several different instruments without own power supply, then you must possibly use a USB hub with own power supply (self powered). The USB (OTG) connector of the 848 Titrino plus is not designed for supplying power to several devices with elevated electric- ity requirements.

  • Page 25: Connecting Instruments To The Remote Connector

    Connecting the USB hub with USB stick, printer and the 6.2148.030 RS-232/USB Box (for connecting balances). Connecting instruments to the remote connector The 848 Titrino plus can be integrated in an automation system with the aid of a remote cable. Figure 13...

  • Page 26: Attaching The Exchange Unit

    Figure 14 Attaching the exchange unit To attach the exchange unit, proceed as follows: 1 Slide the exchange unit from the front onto the 848 Titrino plus and push all the way to the rear. It must snap in audibly.

  • Page 27: Titrations

    The reagent is added in constant volume steps. Measured value acceptance is drift-con- trolled (equilibrium titration) or after a waiting time. Equivalence points are evaluated automatically. U/mV V/mL Figure 16 Reagent dosing for MET ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 28: Endpoint Titration (Set)

    The volume dosed until the endpoint is used for calculating the con- tent of the sample. U/mV Control range V/mL V/mL Initial Continuous dosing dosing Figure 17 Reagent dosing for SET ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 29: Operation

    "Preparing the buret unit (PREP)", page 45. Confirm the message with [OK]. ￭ The display of this message can be deactivated in the system set- tings (see "PREP warning", page 54). The main dialog is displayed: ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 30: Fundamentals Of Operation

    Fundamentals of operation 5.2.1 The keypad Figure 18 Keypad 848 Titrino plus BACK Apply the input and exit the dialog. ⇧ ⇩ Move the selection bar either up or down by one line at a time.

  • Page 31: Structure Of The Dialog Windows

    [⇩] to move the selection bar upward or downward one line at a time. If a dialog text is marked with "＞", then additional settings are available in a subordinate dialog. Use [OK] to access this dialog. Example: System settings ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 32: Entering Text And Numbers

    The [BACK] key has the same function as Accept. A commercially available USB keyboard can be connected to make it eas- ier to enter text and numbers. The assignment of the keys on the PC key- board is described in chapter 10.4.2, page 120. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 33: Selecting From A Selection List

    Mean value of result R# (# = 1…5) TITER Titer of selected solution CONC Concentration of selected solution List of additional variables (see "Variables", page 24) Templates List of predefined calculation formulas (see "Calculation templates", page 24) ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 34 Measured value of fixed endpoint FP# (# = 1…9) Time at fixed endpoint FP# (# = 1…9) For Molw, see the following section. Calculation templates Pressing Templates displays a list with calculation templates. You can apply these templates directly with [OK]. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 35: Methods

    Blank value as single value Methods 5.4.1 Creating a new method Proceed as follows to create a new method: 1 Open the method table In the main dialog, select Method and press [OK]. ￭ The method table opens: ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 36: Saving A Method

    If you modify method parameters, then you can save these as your own method. A maximum of 100 methods can be saved. To save a method, proceed as follows: 1 Opening the method table In the main dialog, select Method and press [OK]. ￭ The method table opens: ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 37: Loading A Method

    The method will be saved and the method table is displayed. 5.4.3 Loading a method To load a method, proceed as follows: 1 Open the method table In the main dialog, select Method and press [OK]. ￭ The method table with the stored methods opens: ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 38: Exporting A Method

    To export a method, proceed as follows: 1 Opening the method table In the main dialog, select Method and press [OK]. ￭ The method table with the stored methods opens: 2 Selecting the method Select the desired method. ￭ ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 39: Control

    This parameter is visible only when Autostart = on. Number of automatic starts. Input range 1 - 50 Selection table Default value table table The number of automatic starts corresponds to the number of samples in the sample table. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 40: Sample Data

    For a sample, you can enter the sample data directly in the main dialog, even while the determination is running (see Chapter 5.9, page 37). Sample identification. The sample identification can be used in calculations as the variable CI1. Entry max. 10 characters Default value empty ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 41: Requesting Sample Data At The Start Of The Determination

    This dialog will be displayed until the entering of the sample data is confirmed with [START], even if the the titration is already completed. This ensures that the sample data is avail- able for calculations. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 42: Sample Table

    3 Activating the sample table Select Sample table and press [OK]. ￭ Select the entry on in the selection list and apply with [OK]. ￭ Press [BACK]. ￭ The menu item Sample table is displayed in the main menu: ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 43: Editing The Sample Data

    In this example, the first line is opened and the sample table contains four lines. One can scroll between the individual data sets with the keys [⇦] and [⇨]. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 44 | mg | µg | mL | µL | pieces | User-defined Default value User-defined A user-defined unit can be created. This will be added to the selection list. The previous entry will be overwritten as soon as the new unit has been defined. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 45: Sending The Sample Size From A Balance

    Send automatically from a connected balance. To do so, consult the ￭ operating instructions for your balance. The following instructions describe how to enter the sample size on the 848 Titrino plus. 1 Loading the method See Chapter "Loading a method", Page 27. ￭...
  • Page 46 Off switches off the stirrer. On then takes its place on the display. This can be used to switch the stirrer back on. The [BACK] key closes this dialog. After the completion of the titration, the results dialog is displayed: ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 47: Live Modifications

    Edit the sample data and apply with Accept or [BACK]. ￭ 3 Displaying the live dialog Press [BACK]. ￭ Select Menu and press [OK]. ￭ Select the menu item Live dialog and press [OK]. ￭ The live dialog is displayed once again. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 48: Editing The Sample Table While A Determination Is Running

    The main dialog is displayed. The determination continues to run in the background. 2 Opening the main menu Select Menu and press [OK]. ￭ 3 Selecting the sample data Select the menu item Sample table and press [OK]. ￭ Select the desired line. ￭ ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 49: Editing The Live Parameters

    Proceed as follows to edit the parameters: 1 Displaying the main dialog Press [BACK]. ￭ The main dialog is displayed. The determination continues to run in the background. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 50: Results

    After the completion of the titration, the results dialog is displayed: The calculated result and details concerning the endpoint are shown in the overview. Curve Display the curve of the current determination. Recalculate Recalculate the current determination. The procedure will be executed immediately. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 51: Statistics

    5.11 Statistics Menu ▶ Results ▶ Statistics The statistical overview of a determination series can be displayed in the Results dialog with the Statistics function. NOTE This function is visible only if statistics has been activated. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 52 If several calculations are defined in the method, then all the results will be removed from the statistics. Deleting statistical data All statistical data is deleted with the Reset function. The statistics data is deleted automatically in the following cases: ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 53: Printing A Report Manually

    Select the menu item Print reports and press [OK]. ￭ The dialog window with the available reports opens: 3 Selecting the report Select the desired report and press [OK]. ￭ The report is printed out. The following reports can be printed out manually: ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 54: Manual Control

    5.13 Manual control Menu ▶ Manual control The following functions are available in the manual control: Dosing ￭ Measuring ￭ Stirring ￭ The available subfunctions are listed for each function in the function bar. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 55: Dosing

    Select the menu item Manual control and press [OK]. ￭ Manual control opens. 2 Select the dosing function Select the Dosing item. ￭ In the function bar, select PREP and press [OK]. ￭ The following message is displayed: ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 56 The main menu opens. Select the menu item Manual control and press [OK]. ￭ Manual control opens. 2 Select the dosing function Select the Dosing item. ￭ In the function bar, select DOS and press [OK]. ￭ ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 57 You can dose a particular volume with the ADD function. Proceed as follows: 1 Open the manual control In the main dialog, select Menu and press [OK]. ￭ The main menu opens. Select the menu item Manual control and press [OK]. ￭ Manual control opens. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 58 5 Fill the cylinder Press [STOP] or [BACK]. ￭ The dosing cylinder is filled. If you start the filling with [BACK], then the dialog will also be exited. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 59: Measuring

    Enter the measuring temperature if no temperature sensor is con- ￭ nected. If a temperature sensor is connected, then the tempera- ture will be measured automatically. This temperature is used for automatic temperature compensation with pH measurements. 4 Start the measurement Press [START]. ￭ ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 60: Stirring

    The stirring rate will be increased or decreased by one step each time the [OK] key is pressed. The algebraic sign changes the direction in which the stirring is done. When viewing the stirrer from above, this means: – "+": counterclockwise rotation – "–": clockwise rotation ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 61 The stirrer is started and stirs at the rate which has been set. Off is now displayed in the function bar. 4 Switching off the stirrer In the function bar, select Off and confirm with [OK]. ￭ The stirrer is stopped. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 62: System Settings

    Time Current time. Only valid numbers can be entered. Format: hh:mm:ss Date Current date. Only valid numbers can be entered. Format: YYYY:MM:DD Language Setting the dialog language. An additional language can be selected besides English. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 63 If the limited dialog for routine operation is activated, then the expert dialog cannot be activated during ongoing operation. To change the dialog type, the 848 Titrino plus must be switched off and then back on again. The expert dialog can be forced as soon as the instrument is started up again.
  • Page 64 PREP (Preparing): After the instrument is switched on. ￭ Each time a buret unit is attached. ￭ All tubing and the cylinder are rinsed with this function (see Chapter 10.1.2, page 117). ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 65 This parameter is visible only when Temperature sensor = NTC. Material constant of the NTC sensor. B values of NTC sensors are fre- quently based on different reference temperatures (usually 25 °C and 50…100 °C). Input range 1000 - 9999 K Default value 4100 K ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 66: Managing Sensors

    Delete the selected sensor from the list. 6.2.2 Editing the sensor data Name The designation of the sensor is used for unambiguous identification. Entry max. 24 characters Default value empty Type The sensor type is displayed. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 67 You will be notified that this time interval (in days) has elapsed when start- ing a method. You can then select whether or not you would still like to start the method. 1 - 999 d Input range 999 d Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 68: Managing Solutions

    Delete the selected solution from the list. 6.3.2 Editing the solution data Name The designation of the solution is used for unambiguous identification. Entry max. 24 characters Default value empty Type The model of the buret unit is displayed. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 69 The previous entry will be overwritten as soon as the new unit has been defined. A blank entry can be generated this way as well. Date titer det. Date of the last titer determination. Monitoring Activating and deactivating the titer monitoring. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 70: Managing Common Variables

    CV05. The value is displayed for every variable. No unit can be assigned to the common variables. Edit See the following chapter for editing the data of the selected common variable. Delete Set the selected common variable to invalid. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 71: Editing Common Variables

    Result R1 ⇨ Common Variable CV01 ￭ Result R2 ⇨ Common Variable CV02 ￭ etc. ￭ NOTE If you have set the parameter Statistics to on, then the mean value of the results will be assigned to the respective common variable. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 72: File Management

    Directory structure on the USB flash drive A directory with the instrument number will be created on the USB flash drive. The structure within this directory appears as follows: Figure 19 Directory structure on the USB flash drive ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 73: Configuring External Devices

    The printers that have the designation ESC-POS are so-called POS printers (point-of-sale printers), i.e. they print on continuous paper. Selection Citizen (ESC-POS) | Custom (ESC-POS) | Epson | Epson (ESC-POS) | HP DeskJet | HP LaserJet | Seiko (ESC-POS) Default value HP DeskJet ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 74 Mettler AX, MX, UMX, PG, Mettler AX AB-S, PB-S Ohaus Voyager, Explorer, Ohaus Analytical Plus Precisa Precisa Sartorius Sartorius Shimadzu BX, BW Shimadzu Editing the COM1 settings Menu ▶ System ▶ External devices ▶ COM1 settings ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 75 Menu ▶ System ▶ External devices ▶ COM2 settings The interface parameters for instruments connected to the RS-232/2 con- nector of the RS-232/USB Box (e.g. PC) are set under COM2 settings. The parameters and input ranges are identical to those for the COM1 interface. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 76: Instrument Diagnosis

    Program files They are instrument-specific. The file name has the following structure: 5XXXyyyy.bin where XXX = Instrument type (e.g. 848 for the 848 Titrino plus) yyyy = Program version Language files They can be recognized by means of the two-digit language code in the file name.

  • Page 77: Diagnosis Functions

    No user intervention is required. 6.7.2 Diagnosis functions Electronic and mechanical functional groups in Metrohm instruments can and should be checked as part of regular maintenance by specialist per- sonnel from Metrohm. Please ask your local Metrohm representative regarding the precise terms and conditions involved in concluding a corre- sponding maintenance agreement.

  • Page 78: Parameters

    Selection max. Default value Pause Waiting time, e.g. for the electrode to settle down after the start or a reaction time after the dosing of a start volume. Input range 0 - 999,999 s Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 79: Titration Parameters

    For titrations in which the finest details are also to be visible. This could, however, also lead to an increase in noise, which could result in unwanted equivalence points. optimal For all standard titrations. The parameters have been optimized for the most frequent applications. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 80 A maximum volume increment should be selected in the following cases: when titration consumption is very low up until the equivalence point ￭ is reached. when a start volume is dosed up until shortly before the equivalence ￭ point is reached. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 81 Measuring mode pH, U and Ipol: Input range 0.1 - 999.0 mV/min Default value 50.0 mV/min Selection ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 82 26 s Table 1 Default values of the predefined titration rates for DET Titration rate slow optimal fast Meas. point density Min. increment 10.00 µL 10.00 µL 30.00 µL Max. increment Dosing rate max. max. max. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 83 Default value not defined not defined No check takes place. I(pol) The polarization current is the current that is applied to a polarizable elec- trode during voltametric measurement. This parameter is available only with I(pol) determinations. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 84 The algebraic sign of the stirring rate changes the stirring direction. When the stirrer is viewed from above, this means: "+": counterclockwise rotation ￭ "–": clockwise rotation ￭ Input range –15 - 15 Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 85: Stop Conditions

    Selection Volume after EP This volume will be added when the number of equivalence points defined under Stop EP has been found. The curve shape after the equiva- lence point can also be seen this way. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 86: Evaluation

    This parameter is visible only when Window = on. Measured value for the lower limit. Measuring mode pH: Input range –20.000 - 20.000 Default value –20.000 Measuring mode U, Ipol: Input range –1,250.0 - 1,250.0 mV Default value –1,250.0 mV ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 87 All equivalence points will be recognized. greatest Only the equivalence point with the greatest ERC value, i.e. the steep- est jump, will be recognized. last Only the last equivalence point will be recognized. No evaluation takes place. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 88 [1] C. F. Tubbs, Anal. Chem. 1954, 26, 1670–1671. [2] E. Bartholomé, E. Biekert, H. Hellmann, H. Ley, M. Weigert, E. Weise, Ullmanns Encyklopädie der technischen Chemie, Vol. 5, Verlag Chemie, Weinheim, 1980, p. 659. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 89: Calculation

    A definition can be made for each calcula- tion as to whether the result is to be saved as a titer or as a common vari- able. The result name is specified in the list for each calculation. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 90 Save as titer The result can be saved as titer for the selected solution. If statistics has been switched on, then the current mean value of the determination series will be saved. on | off Selection Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 91: Statistics

    The reports that will be printed out automatically in connection with a determination are defined under Reports. Results The result report contains the calculated results, equivalence points and endpoints, sample data, etc. Selection on | off Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 92 USB storage medium or sent via an RS-232 interface to a LIMS. The output location is defined in the system settings (see "PC/LIMS report", page 63). The file name of the TXT file is constructed as follows: PC_LIMS_Report- ID1-YYYYMMDD-hhmmss.txt. Selection on | off Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 93: Monotonic Equivalence Point Titrations (Met)

    Waiting time, e.g. for the electrode to settle down after the start or a reaction time after the dosing of a start volume. Input range 0 - 999,999 s Default value Request sample ID Selection of the sample identification that is queried in the method run. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 94: Titration Parameters

    For all standard titrations. The parameters have been optimized for the most frequent applications. fast For fast and less critical titrations. user The individual titration parameters can be modified. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 95 This parameter is visible only when Titration rate = user. Maximum permissible drift for the measured value acceptance, i.e. maxi- mum change of the measured value per minute. This type of titration is often referred to as equilibrium titration. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 96 This parameter is visible only when Titration rate = user. If the signal drift has been switched off or has not yet been reached, then the measured value will be accepted when the maximum waiting time has elapsed. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 97 The validity of the titer is checked for the selected solution at the start of the determination. Selection of configured solutions | not defined Selection Default value not defined ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 98 The algebraic sign of the stirring rate changes the stirring direction. When the stirrer is viewed from above, this means: "+": counterclockwise rotation ￭ "–": clockwise rotation ￭ Input range –15 - 15 Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 99: Stop Conditions

    Selection Volume after EP This volume will be added when the number of equivalence points defined under Stop EP has been found. The curve shape after the equiva- lence point can also be seen this way. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 100: Evaluation

    This parameter is visible only when Window = on. Measured value for the lower limit. Measuring mode pH: Input range –20.000 - 20.000 Default value –20.000 Measuring mode U, Ipol: Input range –1,250.0 - 1,250.0 mV Default value –1,250.0 mV ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 101 0.1 - 99.9 µA Default value 2.0 µA EP recognition This parameter allows you to filter out only the equivalence points that are being sought. for Window = off all | greatest | last | off Selection Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 102 –20.000 - 20.000 Selection Default value Measuring mode U, Ipol: Input range –1,250.0 - 1,250.0 mV Selection Default value Measuring mode Upol: Input range –125.00 - 125.00 µA Selection Default value Fixed EP2 at See Fixed EP1 at. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 103: Calculation

    Evaluation and equivalence point criterion with MET The equivalence points (EPs) are localized by a method based on the For- tuin method which has been adapted by Metrohm for numerical methods. A search is made for the largest measured value change ( ). The exact EP is determined by using an interpolation factor which depends on the Δ...
  • Page 104 A blank entry can be generated this way as well. Save as titer The result can be saved as titer for the selected solution. If statistics has been switched on, then the current mean value of the determination series will be saved. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 105: Statistics

    Menu ▶ Parameters ▶ Reports The reports that will be printed out automatically in connection with a determination are defined under Reports. Results The result report contains the calculated results, equivalence points and endpoints, sample data, etc. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 106 USB storage medium or sent via an RS-232 interface to a LIMS. The output location is defined in the system settings (see "PC/LIMS report", page 63). The file name of the TXT file is constructed as follows: PC_LIMS_Report- ID1-YYYYMMDD-hhmmss.txt. Selection on | off Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 107: Endpoint Titrations (Set)

    If the volume drift is known throughout a longer period of time, this can be entered manually. No drift correction takes place. Drift value This parameter is visible only when Drift correction = manual. Volume drift for manual drift correction. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 108: Start Conditions

    Dosimat (parameterization on the Dosimat). However, this requires that the Activation pulse be enabled. Input range 0 - 999,999 s Default value Start volume Volume that is dosed prior to the start of the titration. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 109 Hold at request If this parameter is activated, then the run will be paused during the request. If the parameter is switched off, the titration will be started in the background. Selection on | off Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 110: Titration Parameters

    U(pol) The polarization voltage is the voltage applied to the polarizable electrode during an amperometric measurement. This parameter is available only with U(pol) determinations. Input range –1,250 - 1,250 mV (Increment: 10) Default value 400 mV ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 111 If two endpoints have been set then the titration direction will be defined automatically. In this case the setting will be ignored. Selection + | - | auto Default value auto ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 112: Control Parameters Ep1

    EP1. Endpoint 1 at Measured value for the first endpoint. Measuring mode pH: –20.000 - 20.000 Input range Selection Default value Measuring mode U and Ipol: –1,250.0 - 1,250.0 mV Input range Selection Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 113 Max. rate. Measuring mode pH: Input range 0.001 - 20.000 Default value 2.000 Selection Measuring mode U and Ipol: Input range 0.1 - 1,250.0 mV Default value 100.0 mV Selection ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 114 If no stop criterion has been selected then the titration will not be canceled. The stop conditions (see Chapter 7.3.6, page 105) always lead to a stop, even if the stop criterion has not been reached. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 115: Control Parameters Ep2

    The titration is canceled when the specified volume has been dosed since the start of the titration. This volume should be adjusted to the size of the titration vessel in order to prevent the contents from running over. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 116: Calculation

    The result name is specified in the list for each calculation. Edit See the following chapter for editing the data of the selected calculation. Delete Delete the selected calculation. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 117 Selection on | off Default value Save as CV The calculated result can be saved as a method-independent variable, called a common variable. The result is then also available in other meth- ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 118: Statistics

    The result report contains the calculated results, equivalence points and endpoints, sample data, etc. Selection on | off Default value Curve Curve report. The width of the curve is defined in the system settings (see "Graphics width", page 64). ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 119 USB storage medium or sent via an RS-232 interface to a LIMS. The output location is defined in the system settings (see "PC/LIMS report", page 63). The file name of the TXT file is constructed as follows: PC_LIMS_Report- ID1-YYYYMMDD-hhmmss.txt. Selection on | off Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 120: Ph Calibration (Cal)

    Manually entered calibration temperature. If a temperature sensor is con- nected then the temperature will be measured continuously. The temperature can also be entered during the run. Input range –20.0 - 150.0 °C Default value 25.0 °C ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 121 The 848 Titrino plus sends a signal (EOD) to the sample changer via the remote connection as soon as the measurement of one buffer has been completed (see Figure 25, page 125).

  • Page 122: Buffers

    Baker | Beckman | DIN | Fisher | Fluka Basel | Selection Hamilton | Merck CertiPUR | Merck Titrisol | Metrohm | Mettler | NIST | Precisa | Radiome- ter | Special Merck CertiPUR Reference temperature = 25 °C. When using Merck CertiPUR buffers (20 °C) the buffer type Merck Titrisol must be selected.

  • Page 123: Reports

    USB storage medium or sent via an RS-232 interface to a LIMS. The output location is defined in the system settings (see "PC/LIMS report", page 63). The file name of the TXT file is constructed as follows: PC_LIMS_Report- ID1-YYYYMMDD-hhmmss.txt. on | off Selection Default value ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 124: Operation And Maintenance

    Maintenance The electronic and mechanical functional groups of Metrohm instruments can and should be checked by specialist personnel from Metrohm as part of a regular preventive maintenance schedule. Please ask your local Metrohm representative regarding the precise terms and conditions involved in concluding a corresponding maintenance agreement.

  • Page 125: Troubleshooting

    Define Titration rate = user and increase ￭ the minimum rate (Min. rate). The results are The minimum dosing rate Define Titration rate = user and reduce the spread widely. is too high. minimum rate (Min. rate) (see Chapter 7.3.4, page 102). ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 126: Miscellaneous

    Miscellaneous Problem Cause Remedy No report is printed. The printer is not recog- Switch the 848 Titrino plus off and then ￭ nized by the instrument. back on again. Use a USB hub and connect the printer to ￭ the USB hub.

  • Page 127: 10 Appendix

    You should carry out this function before the first determination or once per day. Preparing is carried out with the following, non-alterable settings: The entire cylinder volume is dosed twice with the maximum dosing ￭ rate. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 128: Stirring Rate

    NOTE With some balances, the sample identification and the method can be sent in addition to the sample size. Make sure that the balance does not send the sample size until the end. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 129: Usb Devices

    The respective editing dialog must be opened for the numerical input. Table 4 Key assignment Key of the 848 Titrino plus or Key on the numerical USB function in the editing dialog keypad...

  • Page 130: Key Assignment Of A Usb Keyboard

    The lettering of the USB keyboard may differ from above lettering, depending on the country-specific keyboard used. 10.4.3 PC mouse In order to make navigating in the dialog of the 848 Titrino plus easier, a PC mouse can be connected. Table 6 Mouse functions...

  • Page 131: Printer

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 10 Appendix Key of the 848 Titrino plus Mouse function [⇧] [⇩] [⇦] [⇨] Mouse movement vertical/hori- zontal [⇧] [⇩] Scroll wheel vertical 10.4.4 Printer The range of USB printers available is extremely varied and constantly changing. The following points must be taken into account when select-...

  • Page 132: Remote Interface

    Remote interface 10.6.1 Pin assignment of the remote interface Figure 22 Pin assignment of remote socket and remote plug The above figure of the pin assignment applies for all Metrohm instru- ments with 9-pin D-Sub remote connector. ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 133 5 kΩ Pull-up > 100 ms active = low, inactive = high Outputs Open Collector > 200 ms active = low, inactive = high = 20 mA, V = 40 V +5 V: maximum load = 20 mA ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 134: Status Diagram Of The Remote Interface

    Remote status diagram DET/MET Titration mode SET [START] [START] ready/EOD Output 0 Activ./Dos. Output 1 Titr/Determ Output 2 condOK Output 3 Error Output 4 Start Input 0 Stop Input 1 [STOP] Figure 24 Remote status diagram SET ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 135: Remote Control Via An Rs-232 Connection

    EOD = End of Determination 10.7 Remote control via an RS-232 connection The 848 Titrino plus can be remote controlled via an RS-232 connection. For this, a 6.2148.030 RS-232/USB Box is necessary. Connect the RS-232/USB Box to the USB interface of the instrument.

  • Page 136: Commands And Variables

    Parity: none ￭ Handshake: software ￭ On the 848 Titrino plus, adjust the interface parameters under Menu ▶ System ▶ External devices ▶ COM2 settings. Transfer protocol The data communication is synchronous. On each command there is an acknowledgement by the instrument.

  • Page 137: Arithmetic Algorithms In The 848 Titrino Plus

    Arithmetic algorithms in the 848 Titrino plus Numerical format The software of the 848 Titrino plus calculates in accordance with the widespread standard IEEE 754 (IEEE Standard for Binary Floating-Point Arithmetic for Microprocessor Systems). This means that the numbers are used in calculations in "double precision"...
  • Page 138 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 10.8 Arithmetic algorithms in the 848 Titrino plus imal difference may arise between an originally entered decimal number and the internal computer representation in complete accuracy in the range of the rear decimal places. This difference results from the fact that an exact binary equivalent does not exist for every decimal number.
  • Page 139 The above losses of accuracy by rounding off in the range of significant places are only relevant theoretically. They are generally several orders of magnitude less than measurement technique uncertainties (balance errors, dosing errors, measuring errors). ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 140: 11 Technical Specifications

    –125 - –121 µA / +121 - +125 µA: non-guaranteed values, dependent on reference voltage +2.5 V Measuring –1,200 - +1,200 mV range Resolution 0.1 mV ±0.2 mV Measuring (±1 digit, without sensor error, under reference conditions) accuracy ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 141: Temperature

    (For an NTC sensor with R (25 °C) = 30,000 Ω and B (25/50) = 4,100 K) Resolution Pt1000 0.1 °C 0.1 °C Measuring accu- racy Pt1000 ±0.2 °C (applies for measuring range –20 - +150 °C) ±0.6 °C (applies for measuring range +10 - +40 °C) ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 142: Dosing Drive

    2006/95/EC (Low Voltage Directive, LVD) ￭ 2004/108/EC (EMC Directive, EMC) ￭ Federal Inspectorate for Heavy Current Installations ESTI (Accreditation Number SCESp 033) Safety mark for certification type 2 in accordance with NEV (type ￭ testing with market monitoring, EMC conformity) ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 143: Electromagnetic Compatibility (Emc)

    ￭ EN/IEC 61000-4-6 ￭ EN/IEC 61000-4-11 ￭ EN/IEC 61000-4-14 ￭ 11.7 Ambient temperature Nominal function +5 - +45 °C range (at a maximum of 85% humidity) Storage –20 - +60 °C Transport –40 - +60 °C ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 144: Reference Conditions

    Instrument in operation at least 30 min ature status Validity of the After adjustment data 11.9 Dimensions Material of hous- Poly(butylene terephthalate) (PBT) Material of display Glass cover Width 142 mm Height 164 mm Depth 310 mm Weight 2,950 g ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 145: 12 Accessories

    The search results will be displayed. 4 In the search results, select the Devices tab (if it is not already selected) and then click on the Metrohm article number of the required instrument (e.g. 2.852.0050). The page with information pertaining to the searched article is dis- played.
  • Page 146 The Partslists webpage will be displayed. 2 Select the desired output language. 3 Enter the article number and click on the Generate PDF command. The PDF file with the accessories data will be created in the language selected. ￭￭￭￭￭￭￭￭ 848 Titrino plus...

  • Page 147: Index

    Parameters ....... 117 Keyboard layout ....... 64 Result ......... 40 Print ......... 43 Diagnosis ......... 67 Printer ......63, 121 Dialog language ....... 52 Connect ......12 Language ......... 52 Load ........66 Program crash ......121 ￭￭￭￭￭￭￭￭ 848 Titrino plus...
  • Page 148 Connect ......12 Stirring rate ......118 USB flash drive Stop conditions Directory structure ....62 DET ........75 Safety instructions ...... 4 User name ........ 52 MET ........89 Sample data SET ........105 Enter ........30 ￭￭￭￭￭￭￭￭ 848 Titrino plus...

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