Contents Typographical conventions ............7 Warning symbols ..................7 Note symbols ....................7 General information ..............8 Preface ......................8 Intended use ....................8 Safety information ..................8 Notes on operation and maintenance ............10 2.4.1 Battery operation ..................10 2.4.2 Power supply unit operation ..............10 Identifying the device version ..........11 Nameplate ....................11 Order details ....................11 Accessories ....................11...
Page 4
Contents Calibration with temperature probe ............22 6.3.1 Calibration with standard buffer series, example using technical buffer series ....................22 6.3.2 Calibration with any buffers ...............23 Calibration without temperature probe ............25 6.4.1 Calibration with standard buffer series, example using technical buffer series ....................25 6.4.2 Calibration with any buffers ...............27 Display of the condition of the pH combination electrode ......29...
Page 5
Contents 11.3 Operating life ....................50 11.4 General handling of pH combination electrodes ........50 The redox combination electrode ......... 51 12.1 General handling ..................51 Returns and disposal .............. 52 13.1 Returns .......................52 13.2 Disposal .....................52 Technical data ................. 53 China RoHS ................55...
1 Typographical conventions Warning symbols DANGER! This symbol indicates that personal injury from electrocution may occur if the appropriate precautionary measures are not taken. CAUTION! This symbol in connection with the signal word indicates that damage to assets or data loss will occur if the respective precautionary measures are not taken.
2 General information Preface Read through this document carefully and familiarize yourself with the opera- tion of the device before you start using it. Keep this document close at hand and in the immediate vicinity of the device so that you or the specialist person- nel can consult it at all times in case of doubt.
Page 9
2 General information DANGER! If it is to be assumed that risk-free operation of the device is no longer possi- ble, the device must be taken out of service and guarded against subsequent startup by means of an identification marking. The safety of the user may be compromised by the device if, for example, the device •...
2 General information NOTE! Please do not connect any devices to socket 1 (see Chapter 4.3 "Con- nections", page 14)! Notes on operation and maintenance NOTE! The device and sensors must be handled with care and deployed according to the technical data (do not throw, do not subject to impact, etc.). The con- nectors and sockets must be protected against pollutants.
Nameplate Position The nameplate is fitted to the base of the battery compartment. Example Handmessgerät 202710/20 – 000 F – Nr. 00822713 01 0 1815 0001 Fabrication number (F-Nr.) The fabrication number provides information such as the production date (year/week). The production date relates to the characters in positions 12 to 15 (from the left).
4 Operation Display MAX DIF MIN HL D AL Logg Display of the measured value unit Warning signal: In case of low battery or recalibration request No function Subsidiary display/subsidiary measured value: Temperature measured value Signals in operating mode "pH" that the device is in the calibration procedure Signals a stable measured value Signals that a temperature probe has been connected and that the auto-...
4 Operation Control elements The descriptions printed in black on the control keys relate to functions that are available in measurement mode. The descriptions and symbols printed in red on the control keys relate to func- tions that are available when setting the device. Function Function during the measurement...
4 Operation Connections BNC socket to connect a pH or a redox combination electrode This socket doesn‘t have a function, please don‘t connect any devices Socket for connecting a power supply unit (4)/(5) Banana sockets to connect a Pt1000 temperature probe (part no.
5 Measuring Preparing the device for the measurement NOTE! The device is preconfigured per default for measuring the pH value. NOTE! When measuring, always ensure that your pH and redox combination electrode is in good condition and was cleaned and dried before being inserted into the solution.
Page 16
5 Measuring The pH value is calculated based on the negative common logarithm of the hydrogen ion activity (this is often approximately the same as the hydrogen ion concentration): ¦ c(H ) × (H ) = hydrogen ion concentration pH value = –log 1 mol/l in mol/l...
5 Measuring Measuring with temperature probe Insert the pH combination electrode and the temperature probe into the solution and gently stir until a stable measured value is achieved. The measured pH value appears in the main display and the measured temperature appears on the subsid- iary display of the device.
5 Measuring Detecting the rH value Selecting the measurand If the device has been configured for a different measurand in a user- defined operation, first select the measurand "rH" (see "Parameter "InP": selection of a measurand", page 35). Definition The rH value is a value calculated from a pH and a redox measurement. It is used, for example, to describe the antioxidant power of food.
5 Measuring The determined rH value appears on the main display, the measured value for the temperature and the input value for the pH appear alter- nately on the subsidiary display of the device. AL Logg AL Logg 5.4.2 Determining the rH value by automatically transferring the pH value Prerequisites •...
5 Measuring NOTE! Do not switch off the device until the rH measurement is finished or the saved pH value will be deleted. Connect the redox combination electrode to the device. Configure the device for measurand "rH". Gently stir the measurement solution. The determined rH value appears on the main display, the measured values for the temperature and pH...
6 Calibration of the pH combination electrode General information regarding calibration The parameters of pH combination electrodes are subject to fluctuations due to aging and individual variations. It is therefore advisable to check the calibra- tion of the combination electrode before taking a measurement. If the devia- tion is unacceptable, the combination electrode must be recalibrated.
6 Calibration of the pH combination electrode Calibration with temperature probe 6.3.1 Calibration with standard buffer series, example using technical buffer series Calibration point 1 Press the key for at least 2 seconds to start the calibration. Insert the combination electrode and the temperature probe into the first buffer solution and gently stir.
6 Calibration of the pH combination electrode The device detects the selected buffer solution automatically and saves the measured pH value as calibration point 2 as soon as it is stable. With 2 point calibration selected, the condition of the combination electrode is then briefly displayed and then the 2 point calibration is completed and the device returns to measurement mode.
Page 24
6 Calibration of the pH combination electrode The set value is on the main display of the device, "Pt.1" and a revolving symbol appear on the subsidi- ary display of the device. AL Logg Press the key when the measured value is stable (small triangle appears on the display above the yellow "ok"...
6 Calibration of the pH combination electrode Calibration point 3 Insert the combination electrode and the temperature probe into the third buffer solution and gently stir. Press the key when the measured value is stable (small triangle appears on the display above the yellow "ok" label). Finally, the condition of the combination electrode is briefly displayed and then the 3 point calibration is completed and the device returns to measurement mode.
Page 26
6 Calibration of the pH combination electrode With 1 point calibration selected, the condition of the combination electrode is then briefly displayed and then the 1 point calibration is completed and the device returns to measurement mode. The values "4.0" and "10.0" appear alternately on the main display of the device, "Pt.2"...
6 Calibration of the pH combination electrode The display changes so that the temperature value for the third buffer solution can be entered. AL Logg Use the keys to set the temperature value for the third buffer solution and then save by pressing the key.
Page 28
6 Calibration of the pH combination electrode The display changes so that the temperature value (t.1) for the first buffer solution can be entered. AL Logg Use the keys to set the temperature value for the first buffer solution and then save by pressing the key.
6 Calibration of the pH combination electrode The value on the main display of the device flashes, "Pt.3" and a revolving symbol appear in the subsidi- ary display of the device to indicate that the input of the pH value for the third buffer solution is expected. AL Logg Use the keys to set the value for the third buffer solution.
6 Calibration of the pH combination electrode less than 30 %: The combination electrode is severely aged or contami- nated. If there is no improvement after cleaning (see chapter 11.2 "Cleaning", page 50) and subsequent calibration, the com- bination electrode must be replaced. NOTE! During the evaluation, both the asymmetry and the slope of the combination electrode are considered.
6 Calibration of the pH combination electrode NOTE! After prior 2 point calibration, the slope for the entire measuring range is displayed (SL.). After prior 3 point calibration, the slope for the acidic range is displayed first (SL. 1). After pressing the key again, the slope for the alkaline range (SL.
7 Calibration of the measuring inputs Offset/zero point correction and slope correction of the voltage input and the temperature input A zero point correction or slope correction of both the voltage input and the temperature input can be carried out using the parameters "OFFS" (See page 42) and "SCAL"...
8 Device settings Calling up the setting menu Overview of the setting menu The setting menu is called up from measurement mode by pressing the key for at least 2 seconds (main display "SEt"). The 4 individual submenus in the setting menu are then selected by repeatedly pressing the key.
8 Device settings Resetting to default settings NOTE! If the keys are pressed simultaneously for over 2 seconds, the device is reset to the default settings. Configuring the device 8.3.1 Submenu "SEt ConF": general settings Overview of the parameters After calling up the setting menu with and selecting the submenu "SEt ConF", use the key to select the parameter to be configured.
Page 35
8 Device settings Parameters "CAL.P": selection of the buffer series, See page 37 "C.int": calibration timer, See page 37 "Unit t": temperature unit °C/°F, See page 38 "Auto HLD": automatic saving of a measured value, See page 38 "P.oFF": automatic device switch-off, See page 39 "Out": universal output, See page 39 (10) "Adr.": universal output...
Page 36
8 Device settings Parameter "rES pH": resolution of the pH display The parameter "rES pH" can only be accessed when the "pH" measurand has been selected. Use the keys to set the resolution: Menu/parameter Setting option Meaning Resolution in tenths pH 0.01 Resolution in hundredths pH AL Logg...
Page 37
8 Device settings Parameter "CAL.P": selection of the buffer series The parameter "CAL.P" can only be accessed when the "pH" measurand has been selected. Use the keys to select the desired buffer series: Menu/parameter Setting option Meaning Technical buffer series (capsules), pH 4|7|10 Technical buffer series (liquid buffer), pH 4|7|10...
Page 38
8 Device settings Parameter "Unit t": temperature unit °C/°F Use the keys to select the temperature unit: Menu/parameter Setting option Meaning °C All temperatures stated in degrees Cel- sius °F All temperatures stated in degrees Fahren- heit AL Logg Press the key to save the setting and move to the next parameter or press the key to save the setting and move to the next submenu of the...
Page 39
8 Device settings Parameter "P.oFF": automatic device switch-off Use the keys to set the switch-off delay: Menu/parameter Setting option Meaning 1 to Switch-off delay in minutes. 20 to If no key is pressed, the device switches off automatically once this period of time has elapsed Automatic switch-off deactivated (permanent operation)
8 Device settings 8.3.2 Submenu "SEt Out": serial interface settings Overview of the parameters After calling up the setting menu with and selecting the submenu "SEt Out", use the key to select the parameter to be configured. mg/l kOhm µS AL Logg %/K 1/cm Parameter "Out": serial interface...
8 Device settings Parameterizing the device 8.4.1 Submenu "SEt Corr": offset/zero point correction and slope cor- rection of the voltage and temperature measurement Overview of the parameters After calling up the setting menu with and selecting the submenu "SEt Corr", use to select the parameter to be configured.
Page 42
8 Device settings Parameter "SCAL": slope correction of the voltage measurement Use the keys to set the slope correction: Menu/parameter Setting option Meaning no slope correction of the voltage mea- surement -5.0 to 5.0 slope correction of the voltage measure- ment in % AL Logg Press the...
8 Device settings Parameter "SCAL": slope correction of the temperature measurement Use the keys to set the slope correction: Menu/parameter Setting option Meaning No slope correction of the temperature measurement -5.0 to 5.0 Slope correction of the temperature measurement in % AL Logg Press the key to save the setting and move to the next parameter or...
Page 44
8 Device settings Parameter "CLOC": setting the time Use the keys to set the time: Menu/parameter Setting option Meaning HH:MM Hours (HH) and minutes (MM) Press the keys to set the time in incre- ments of 1 minute Press and hold the keys to continu- ously move through the time setting;...
8 Device settings Parameter "dAtE": setting the date Use the keys to set the date: Menu/parameter Setting option Meaning DD:MM Days (DD) and months (MM) AL Logg Press the key to save the setting and move to the next parameter or press the key to save the setting and move to the next submenu of the setting menu or...
9 Maintenance Good laboratory practice (GLP) Good laboratory practice involves regularly monitoring the device and the accessories. In the case of pH measurements, the correct pH calibration must be ensured in particular. The device provides support in this regard with the functions "C.int"...
9 Maintenance The date of the last calibration is shown in the main display. The time of the last calibration is shown in the subsidiary dis- play. AL Logg With the 1 point calibration, the acidic slope = the alkaline slope = -59.16 mV/pH is assumed. With the 2 point calibration, the acidic slope = the alkaline slope.
10 Error and system messages Error messages during measurement Display Cause Remedy Battery voltage low, Insert new battery the function can still be guaranteed only for a short time. Battery is used up Insert new battery During mains operation: incorrect voltage Test power supply unit, replace if necessary No display or Battery voltage too low Insert new battery...
11 The pH combination electrode NOTE! pH combination electrodes are wearing parts that need to be replaced after chemical and mechanical exposure when the required values can no longer be obtained, even after thorough cleaning. When in use, it is important to remember that various substances (for exam- ple, hydrofluoric acid (HF)) corrode glass in aqueous solutions.
11 The pH combination electrode 11.2 Cleaning The ion-sensitive glass membrane of the combination electrode can be rinsed under lukewarm water. More severe pollutants can be removed using a soft cloth and a mild household detergent. Never clean combination electrodes with abrasive cleaning agents (scouring powder, scouring cream, etc.) or with a scouring pad! Deposits containing protein on the sensor part of the combination electrode can be cleaned by being immersed in 0.1 molar of hydrochloric acid solution...
12 The redox combination electrode CAUTION! The manual measuring device is designed for using electrodes with the Ag/ ACl (silver/silver chloride) reference system. If using other types, the measuring function mV will yield incorrect measure- ment results. 12.1 General handling Combination electrodes should be stored in a dry place at a temperature between 10 °C and 30 °C.
13 Returns and disposal 13.1 Returns DANGER! All devices that are returned to the manufacturer must be free from measuring material residue and other hazardous substances. Measuring material residue on the case or on the sensor may pose a hazard to persons or the environ- ment.
14 Technical data Measuring ranges 0.00 to 14.00 pH Redox voltage (mV) -1999 to +2000 mV Redox voltage (mV -1792 to +2207 mV (referring to hydrogen system, at 25 °C, DIN 38404) 0.0 to 70.0 rH Temperature -5.0 to +150.0 °C, Pt1000 23.0 to 302.0 °F Accuracy ±0.01 pH...
Page 54
14 Technical data Power supply Battery operation 9 V battery, type IEC 6F22 (included in scope of delivery) Mains operation External power supply unit (DC 10.5 to 12 V) with coaxial power connector, exterior Ø 5.5 mm (-), inner pin Ø 1.9 mm (+) (not included in scope of delivery) Current consumption <1 mA (with serial interface switched off) "...
Page 58
JUMO GmbH & Co. KG JUMO Instrument Co. Ltd. JUMO Process Control, Inc. Street address: JUMO House 6733 Myers Road Moritz-Juchheim-Straße 1 Temple Bank, Riverway East Syracuse, NY 13057, USA 36039 Fulda, Germany Harlow, Essex, CM20 2DY, UK Delivery address:...
Need help?
Do you have a question about the 202710/20 and is the answer not in the manual?
Questions and answers