Operating manual pH 3110 69 pH 92 24 8 °C TP AR pH meter ba75791e02 11/2008
pH 3110 Accuracy when going to press Copyright The use of advanced technology and the high quality standard of our instruments are the result of a continuous development. This may result in differences between this operating manual and your meter. Also, we cannot guarantee that there are absolutely no errors in this manual. Therefore, we are sure you will understand that we cannot accept any legal claims resulting from the data, figures or descriptions.
pH 3110 Contents pH 3110 - Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 1.2 1.3 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 2.2 3 4.2 4.3 4.4 4.5 4.6 5.2 5.3 11/2008 13 13 13 14 General operating principles . . . . . . . . . . . . . . . . . . . . . . 4.1.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 4.1.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents pH 3110 5.4 6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 7.1 7.2 8 4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 44 Lists . . . . . . . . . . . . . . . . . . . . . . . . . .
pH 3110 Overview 1 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.
Overview pH 3110 1.1 Keypad pH 3110 In this operating manual, keys are indicated by brackets <..> . The key symbol (e.g. ) 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. ).
pH 3110 Overview 1.
Overview pH 3110 1.3 Socket field 1 4 2 3 Connectors: 1 pH electrode 2 Reference electrode 3 Temperature sensor 4 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). Almost all customary sensors fulfill these conditions.
pH 3110 Safety 2 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. Target group Safety instructions The meter was developed for work in the field and in the laboratory.
Safety pH 3110 2.1 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 TECHNICAL DATA must be observed. Only the operation and running of the meter according to the instructions given in this operating manual is authorized. Any other use is considered unauthorized. 2.
pH 3110 Safety Safe operation If safe operation is no longer possible, the meter must be taken out of service and secured against inadvertent operation! Safe operation is no longer possible if the meter: z has been damaged in transport z has been stored under adverse conditions for a lengthy period of time z is visibly damaged z no longer operates as described in this manual. If you are in any doubt, please contact the supplier of the meter.
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pH 3110 Commissioning 3 Commissioning 3.1 Scope of delivery z Handheld meter, pH 3110 z 4 batteries 1.5 V Mignon type AA z Operating manual 3.2 Initial commissioning Perform the following activities: z Insert the supplied batteries z Switch on the meter 3.2.1 Inserting the batteries 1 Unscrew the two screws (1) on the underside of the meter. 2 Open the battery compartment (2) on the underside of 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. The ± signs on the batteries must correspond to the ± signs in the battery compartment. 4 3.2.2 Close the battery compartment (2) and tighten the screws (1).
pH 3110 Operation 4 Operation 4.1 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: z Measurement The display indicates the measurement data in the measured value display z Calibration The display guides you through a calibration procedure with calibration information z Configuration The system menu or a sensor menu with submenus, settings and functions is displayed 4.1.
Operation pH 3110 4.2 Preparatory activities Measuring Perform the following preparatory activities when you want to measure: 1 Connect the pH combination electrode to the meter. 2 Adjust the temperature of the buffer solutions or test solutions, or measure the current temperature, if you measure without a temperature sensor. 3 Calibrate or check the meter with the combination electrode. 4 Select the measured parameter with .
pH 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 1 Perform the preparatory activities according to section 4.2. 2 Immerse the pH combination electrode in the test sample. 3 Using , scroll as necessary until the measured parameter pH is displayed. 4 Wait for a stable measured value.
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. 1 Perform the preparatory activities according to section 4.2. 2 Immerse the ORP electrode in the test sample. 3 If necessary, call up the measured parameter U with . 4 Wait for a stable measured value. The AR display indicator flashes as long as the measured value is not yet stable. U 4 8 63 213 mV TP °C AR Note ORP electrodes are not calibrated.
pH 3110 Operation 4.3 Why calibrate? When do you have to calibrate? Calibration 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. Thus, you should calibrate at regular intervals.
Operation Calibration record Displaying the calibration data Calibration evaluation pH 3110 When finishing a calibration, the new calibration values are first displayed as an informative message and stored. You can display the data of the last calibration (see section 4.4). After calibrating, the meter automatically evaluates the calibration. The zero point and slope are evaluated separately. The worse evaluation of both is taken into account.
pH 3110 Operation 5 4.3.1 Set the buffer set to be used for calibration as necessary. 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. Note To ensure the high measuring accuracy of the measuring system, calibrate after the calibration interval has expired. Setting the calibration interval The calibration interval (Int.
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. 1 Press repeatedly until the AutoCal TEC or AutoCal DIN function display indicator appears.
pH 3110 Operation Note Here you can cancel the calibration procedure with . This corresponds to a single-point calibration. The value of the zero point (ASY) is displayed. Pressing displays the value of the slope (SLO). Continuing with twopoint calibration 5 Thoroughly rinse the combination electrode with distilled water. 6 If necessary, set the temperature of the second buffer solution with <▲><▼>. 7 Immerse the combination electrode in the second buffer solution.
Operation pH 3110 12 Press the 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. 13 Press the key. The value of the slope (mV/pH) appears on the display. 14 To return to the measuring mode: Press the key. Note While the zero point (ASY) is being displayed, you can change the unit of the zero point with <▲><▼>.
pH 3110 Operation ASY 248 TP °C ConCal 2 If necessary, set the temperature of the first buffer solution with <▲><▼>. 3 Immerse the pH combination electrode in the first buffer solution (pH 7.0 ± 0.5 for two-point calibration). 4 Press the key. The measured pH value appears on the display. 5 When the measured value is stable, using <▲><▼>, set the measured value to the nominal pH value of the buffer solution (at the current temperature). 6 Press the key.
Operation pH 3110 7 To continue the two-point calibration, thoroughly rinse the combination electrode with deionized water. 8 If necessary, set the temperature of the second buffer solution with <▲><▼>. 9 Immerse the combination electrode in the second buffer solution. 10 Press the key. The second pH value appears on the display. 11 When the measured value is stable, using <▲><▼>, set the measured value to the nominal pH value of the buffer solution (at the current temperature).
pH 3110 Operation 4.4 Downloading calibration data You can download calibration data to the display as follows: 1 Pressing displays the calibration data (asymmetry). 02 mV ASy ConCal Note While the calibration data is displayed you can press <▲><▼> to switch over the unit of the zero point (ASY). 2 With display the slope. - 592 mV/pH SL O ConCal Note While the calibration data is displayed you can press <▲><▼> to switch over the unit of the slope (SLO).
Operation pH 3110 4.5 Settings You can adapt the meter to your individual requirements. The settings are done in the following menus: z System settings () – Switch-off interval (t.Off) z Measurement settings () – Display of the buffer during calibration (pH nominal value or measured voltage value in mV) – Unit of the value for the slope (mV/pH or %) – Unit of the value for the zero point (mV, pH) – Measured value resolution, pH (0.000 / 0.00 / 0.0) – Measured value resolution, U (0.
pH 3110 Operation 4.5.1 System settings The default setting is printed in bold. Switch-off interval (t.Off) 1 10, 20, 30, 40, 50 min, 1, 2, 3, 4, 5, 10, 15, 20, 24 h Open the menu for system settings with . Switch-off interval (t.Off) Time ba75791e02 11/2008 t Of f 010 0 2 Set the switch-off interval with <▲><▼>. 3 Confirm with . The system settings are completed. The meter switches to the measuring mode.
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) mV/pH, % Unit of the value for the zero point (ASY) mV, pH Measured value resolution, pH 0.000 , 0.00 , 0.0 Measured value resolution, U 0.0 , 0 Temperature unit (UnIt) °C, °F Calibration interval (Int.C) 0 ... 7 ...
pH 3110 Operation Unit of the value for the slope (SLO) pH SL O 4 Using <▲><▼>, select the unit for the slope. 5 Confirm with . ASY, the unit of the value for the zero point (mV or pH) is displayed. Unit of the value for the zero point (ASY) ba75791e02 11/2008 mV/pH pH ASY mV 6 Using <▲><▼>, select the unit for the zero point. 7 Confirm with . res, the resolution of the pH display (0.0, 0.00 or 0.000) appears on the display.
Operation pH 3110 pH resolution (res) pH res o o oo 8 Select the resolution for the pH display with <▲><▼>. 9 Confirm with . res, the resolution of the voltage display (0.0, 0.00 or 0.000) appears on the display. U resolution (res) U res mV oo 32 10 Using <▲><▼>, select the unit for the voltage display. 11 Confirm with . Unit, the setting of the unit of the temperature value is displayed.
pH 3110 Operation Temperature unit (Unit) Unit oC TP °C 12 Using <▲><▼>, toggle between °C and °F. 13 Confirm with . Int.C, the setting of the calibration interval is displayed. Calibration interval (Int.C) Time INT C d AutoCal DIN 7 AutoCal TEC ba75791e02 11/2008 14 Set the interval with <▲><▼>. 15 Confirm with . The measurement settings are completed. The meter switches to the measuring mode.
Operation pH 3110 4.6 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 default condition Zero point 0 mV (pH 7.000) Slope -59.16 mV/pH (100 %) Note The measuring system is not calibrated after a reset. Before measuring, recalibrate the meter. Resetting calibration values 1 _ Press to open the menu for the reset of the calibration data. Init.C is displayed.
pH 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: Resetting the meter settings System settings section 4.5.1 Measurement settings section 4.5.2 1 Switch on the meter with . The display test appears briefly on the display. 2 During the display test, press to open the menu for the reset of the meter settings. Init is displayed.
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pH 3110 Maintenance, cleaning, disposal 5 Maintenance, cleaning, disposal 5.1 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 1 Unscrew the two screws (1) on the underside of the meter. 2 Open the battery compartment (2) on the underside of the meter. 1 2 3 Remove the four batteries from the battery compartment.
Maintenance, cleaning, disposal pH 3110 5 5.2 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. Remove any splashes immediately. 5.3 Packing This meter is sent out in a protective transport packing.
pH 3110 What to do if... 6 Error message OFL, UFL Error message CalError What to do if...
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pH 3110 What to do if...
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pH 3110 Technical data Dimensions Weight Mechanical structure 7 Technical data 7.1 General data approx. 240 x 190 x 80 mm approx. 0.4 kg Type of protection IP 67 Electrical safety Protective class III Test certificates CE Ambient conditions Power supply Sensor input Guidelines and norms used ba75791e02 11/2008 Storage - 25 °C ... + 65 °C Operation -10 °C ... + 55 °C Climatic class 2 Batteries 4 x 1.
Technical data pH 3110 7.2 Measuring ranges, resolution Measuring ranges, resolution, accuracy Variable Measuring range Resolution pH - 2.0 ... + 20.0 0.1 - 2.00 ... + 20.00 0.01 - 2.000 ... + 19.999 0.001 - 1200.0 ... + 1200.0 0.1 - 2000 ... + 2000 1 T [°C] - 5.0 ... + 105.0 0.1 T [°F] 23.0 ... + 221.0 0.1 Variable Range Increment Tmanual [°C] - 25 ... + 130 1 Tmanual [°F] -13 ...
pH 3110 Lists 8 Lists This chapter provides additional information and orientation aids. Specialist terms Index 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. The index helps you to find the topics that you are looking for. Glossary Adjusting To manipulate a measuring system so that the relevant value (e. g.
Lists pH 3110 Measured value Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g solvent. ORP voltage The ORP is caused by oxidizing or reducing substances dissolved in water, if these substances become effective at an electrode surface (e. g. a gold or platinum surface). pH value The pH is a measure of the acidic or basic effect of an aqueous solution. It corresponds to the negative decadic logarithm of the molal hydrogen ions activity divided by the unit of the molality.
pH 3110 Lists Index A P Authorized use . . . . . . . . . . . . . . . . . . . . . . 10 AutoCal . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 AutoRead . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . 9 R Battery compartment . . . . . . . . . . . . . . 13, 37 Baud rate setting . . . . . . . . . . . . . . . . . . . . 29 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 All meter settings . . . . . . . . . .
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