wtw pH 3110 Operating Manual
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wtw pH 3110 Operating Manual

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Operating manual
pH 3110
pH meter
ba75791e02
11/2008

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  • Page 1 Operating manual pH 3110 pH meter ba75791e02 11/2008...
  • Page 2 © Copyright Weilheim 2008, WTW GmbH Reproduction in whole - or even in part - is prohibited without the express written permission of WTW GmbH, Weilheim. Printed in Germany. ba75791e02 11/2008...

  • Page 3: Table Of Contents

    Contents pH 3110 - Contents Overview ........5 Keypad .
  • Page 4 Contents pH 3110 Disposal ........38 What to do if...

  • Page 5: Overview

    3110 Overview Overview The compact pH 3110 precision pH meter enables you to perform pH measurements rapidly and reliably. The pH 3110 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications. The proven calibration procedures and automatic stability control function (AR) support your work with the pH meter.

  • Page 6: Keypad

    Overview pH 3110 Keypad pH 3110 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 7: Display

    3110 Overview Display Status display Sensor symbol (calibration evaluation) Measured value display Function and temperature display indicators Function display AutoCal TEC Calibration with automatic buffer recognition indicators (buffer set: Technical buffers ) AutoCal DIN Calibration with automatic buffer recognition...

  • Page 8: Socket Field

    Overview pH 3110 Socket field Connectors: pH electrode Reference electrode Temperature sensor Service interface Caution Only connect sensors to the meter that cannot return any voltages or currents that are not allowed (> SELV and > current circuit with current limiting).

  • Page 9: Safety

    3110 Safety Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the meter. Consequently, all responsible personnel must read this operating manual before working with the meter. The operating manual must always be available within the vicinity of the meter.

  • Page 10: Authorized Use

    Safety pH 3110 Authorized use This meter is authorized exclusively for pH and ORP measurements in a laboratory or field environment. The technical specifications as given in chapter 7 T must ECHNICAL DATA be observed. Only the operation and running of the meter according to the instructions given in this operating manual is authorized.
  • Page 11 Safety datasheets of the chemical manufacturers. Caution In addition to the safety instructions mentioned here, also follow the safety instructions of the sensors used. The operating manuals of the sensors are available on the supplied CD and on the Internet under www.WTW.com. ba75791e02 11/2008...
  • Page 12 Safety pH 3110 ba75791e02 11/2008...

  • Page 13: Commissioning

    3110 Commissioning Commissioning Scope of delivery Handheld meter, pH 3110 4 batteries 1.5 V Mignon type AA Operating manual Initial commissioning Perform the following activities: Insert the supplied batteries Switch on the meter 3.2.1 Inserting the batteries Unscrew the two screws (1) on the underside of the meter.

  • Page 14: Switching On The Meter

    Commissioning pH 3110 Note Alternatively, you can also use Ni-MH rechargeable batteries (type Mignon AA). In order to charge the batteries, an external charging device is required. Caution Make sure that the poles of the batteries are positioned correctly. ±...

  • Page 15: Operation

    3110 Operation Operation General operating principles This section contains basic information on the operation of the pH 3110. 4.1.1 Operating modes The meter has the following operating modes: Measurement The display indicates the measurement data in the measured value...

  • Page 16: Measuring

    Operation pH 3110 Measuring Preparatory activities Perform the following preparatory activities when you want to measure: Connect the pH combination electrode to the meter. Adjust the temperature of the buffer solutions or test solutions, or measure the current temperature, if you measure without a temperature sensor.

  • Page 17: Measuring The Ph Value

    3110 Operation Note When calibrating without temperature sensor, also set the current temperature of each buffer solution manually with the <▲><▼> keys. 4.2.1 Measuring the pH value Perform the preparatory activities according to section 4.2. Immerse the pH combination electrode in the test sample.

  • Page 18: Measuring The Orp

    Operation pH 3110 4.2.2 Measuring the ORP The meter can, in conjunction with an ORP electrode, measure the ORP (mV) of a solution. Perform the preparatory activities according to section 4.2. Immerse the ORP electrode in the test sample. If necessary, call up the measured parameter U with <M>.

  • Page 19: Calibration

    3110 Operation Calibration Why calibrate? pH combination electrodes age. This changes the zero point (asymmetry) and slope of the pH combination electrode. As a result, an inexact measured value is displayed. Calibration determines the current values of the zero point and slope of the combination electrode and stores them in the measuring instrument.
  • Page 20 Operation pH 3110 Calibration record When finishing a calibration, the new calibration values are first displayed as an informative message and stored. Displaying the You can display the data of the last calibration (see section 4.4). calibration data Calibration evaluation After calibrating, the meter automatically evaluates the calibration.

  • Page 21: Calibration Interval (Int.c)

    3110 Operation Set the buffer set to be used for calibration as necessary. 4.3.1 Calibration interval (Int.C) The calibration interval reminds you to calibrate regularly. When the adjusted calibration interval (Int.C) has expired, the sensor symbol flashes. It is still possible to measure.

  • Page 22: Automatic Calibration (Autocal)

    Operation pH 3110 4.3.2 Automatic calibration (AutoCal) For the AutoCal TEC and AutoCal DIN procedures, use one to three buffer solutions of the relevant buffer set (Technical buffers or DIN buffers) in any order. Note The steps 2 and 6 are not necessary if you use a temperature sensor.
  • Page 23 3110 Operation Note Here you can cancel the calibration procedure with <M>. This corresponds to a single-point calibration. The value of the zero point (ASY) is displayed. Pressing <ENTER> displays the value of the slope (SLO). Continuing with two- Thoroughly rinse the combination electrode with distilled water.

  • Page 24: Conventional Calibration (Concal)

    Operation pH 3110 Press the <ENTER> key. The AR display indicator flashes. The electrode voltage (mV) or the nominal value of the buffer (setting: see section 4.5.2) is displayed. The asymmetry is displayed as soon as a stable value is recognized.
  • Page 25 3110 Operation °C ConCal If necessary, set the temperature of the first buffer solution with <▲><▼>. Immerse the pH combination electrode in the first buffer solution (pH 7.0 ± 0.5 for two-point calibration). Press the <ENTER> key. The measured pH value appears on the display.
  • Page 26 Operation pH 3110 To continue the two-point calibration, thoroughly rinse the combination electrode with deionized water. If necessary, set the temperature of the second buffer solution with <▲><▼>. Immerse the combination electrode in the second buffer solution. Press the <ENTER> key. The second pH value appears on the display.

  • Page 27: Downloading Calibration Data

    3110 Operation Downloading calibration data You can download calibration data to the display as follows: Pressing <CAL > displays the calibration data (asymmetry). ConCal Note While the calibration data is displayed you can press <▲><▼> to switch over the unit of the zero point (ASY).

  • Page 28: Settings

    Operation pH 3110 Settings You can adapt the meter to your individual requirements. The settings are done in the following menus: System settings (<ENTER >) – Switch-off interval (t.Off) Measurement settings (<M >) – Display of the buffer during calibration (pH nominal value or measured voltage value in mV) –...

  • Page 29: System Settings

    3110 Operation 4.5.1 System settings The default setting is printed in bold. Switch-off interval (t.Off) 10, 20, 30, 40, 50 min, 1, 2, 3, 4, 5, 10, 15, 20, 24 h Open the menu for system settings with <ENTER >.

  • Page 30: Measurement Settings

    Operation pH 3110 4.5.2 Measurement settings These settings apply to calibration and measurement (the default setting is printed in bold). Display during calibration (BUFFER) pH (buffer nominal value), U (combination electrode voltage) Unit of the value for the slope (SLO)
  • Page 31 3110 Operation Unit of the value for the slope (SLO) mV/pH Using <▲><▼>, select the unit for the slope. Confirm with <ENTER>. ASY, the unit of the value for the zero point (mV or pH) is displayed. Unit of the value for the...
  • Page 32 Operation pH 3110 pH resolution (res) Select the resolution for the pH display with <▲><▼>. Confirm with <ENTER>. res, the resolution of the voltage display (0.0, 0.00 or 0.000) appears on the display. U resolution (res) Using <▲><▼>, select the unit for the voltage display.
  • Page 33 3110 Operation Temperature unit (Unit) °C Using <▲><▼>, toggle between °C and °F. Confirm with <ENTER>. Int.C, the setting of the calibration interval is displayed. Calibration interval (Int.C) Time AutoCal DIN AutoCal TEC Set the interval with <▲><▼>. Confirm with <ENTER>.

  • Page 34: Reset

    Operation pH 3110 Reset 4.6.1 Resetting calibration values This function resets the calibration values to the default condition. All other meter settings are retained. Calibration values in the Zero point 0 mV (pH 7.000) default condition Slope -59.16 mV/pH (100 %) Note The measuring system is not calibrated after a reset.

  • Page 35: Resetting All Meter Settings

    3110 Operation 4.6.2 Resetting all meter settings This function resets all meter settings to the default condition. The relevant values are given in the following sections: System settings section 4.5.1 Measurement settings section 4.5.2 Resetting the meter Switch on the meter with <On/Off>.
  • Page 36 Operation pH 3110 ba75791e02 11/2008...

  • Page 37: Maintenance, Cleaning, Disposal

    3110 Maintenance, cleaning, disposal Maintenance, cleaning, disposal Maintenance The only maintenance activity required is replacing the batteries. Note See the relevant operating manuals of the combination electrodes for instructions on maintenance. 5.1.1 Replacing the batteries Unscrew the two screws (1) on the underside of the meter.

  • Page 38: Cleaning

    Maintenance, cleaning, disposal pH 3110 Close the battery compartment (2) and tighten the screws (1). Cleaning Occasionally wipe the outside of the meter with a damp, lint-free cloth. Disinfect the housing with isopropanol as required. Caution The housing is made of synthetic material (ABS). Thus, avoid contact with acetone or similar detergents that contain solvents.

  • Page 39: What To Do If

    3110 What to do if... What to do if... Error message Cause Remedy OFL, UFL pH combination electrode: – Measured value outside the – Use suitable combination measuring range electrode – Air bubble in front of the – Remove air bubble diaphragm –...
  • Page 40 What to do if... pH 3110 No stable measured Cause Remedy value pH combination electrode: – Diaphragm contaminated – Clean diaphragm – Membrane contaminated – Clean membrane Test sample: – pH value not stable – Measure with air excluded if necessary –...
  • Page 41 3110 What to do if... Obviously incorrect Cause Remedy measured values pH combination electrode: – pH combination electrode – Use suitable combination unsuitable electrode – Temperature difference – Adjust temperature of buffer between buffer and test sample or sample solutions too high –...
  • Page 42 What to do if... pH 3110 ba75791e02 11/2008...

  • Page 43: Technical Data

    3110 Technical data Technical data General data Dimensions approx. 240 x 190 x 80 mm Weight approx. 0.4 kg Mechanical structure Type of protection IP 67 Electrical safety Protective class Test certificates Ambient Storage - 25 °C ... + 65 °C...

  • Page 44: Measuring Ranges, Resolution, Accuracy

    Technical data pH 3110 Measuring ranges, resolution, accuracy Measuring ranges, Variable 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 - 2000 ... + 2000 T [°C]...

  • Page 45: Lists

    3110 Lists Lists This chapter provides additional information and orientation aids. Specialist terms The glossary briefly explains the meaning of the specialist terms. However, terms that should already be familiar to the target group are not described here. Index The index helps you to find the topics that you are looking for.
  • Page 46 Lists pH 3110 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).
  • Page 47 3110 Lists Index Authorized use ..... . 10 Precautions ......9 AutoCal .
  • Page 48 Lists pH 3110 ba75791e02 11/2008...
  • Page 49 Wissenschaftlich-Technische Werkstätten GmbH Dr.-Karl-Slevogt-Straße 1 D-82362 Weilheim Germany Tel: +49 (0) 881 183-0 +49 (0) 881 183-100 Fax: +49 (0) 881 183-420 E-Mail: Info@WTW.com Internet: http://www.WTW.com...

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