Hand-held digital microprocessor pH meters

M. K. JuchheimGmbH & Co UK USAJumo Instrument Co. Ltd. Jumo Process Control Inc.36035 Fulda, Germany Temple Bank, Riverway 735 Fox ChasePhone (0661) 6003 - 0 Harlow, Essex CM20 2TT Coatesville, PA 19320Fax (0661) 6003 - 607 Phone (01279) 63 55 33 Phone 610 - 380 - 8002Telex 49 701 juf d Fax (01279) 63 52 62 800 - 554 JUMOemail JUMO_de@e-mail.com Fax 610 - 380 - 8009Data Sheet 20.2710Page 1/3Hand-held digital microprocessorpH metersBrief descriptionThe pH meters Series 202710/10 and 202710/11 are handy battery-operated measuringinstruments for connection to pH electrodes with BNC plug.On model 202710/10 the temperature compensation is performed by manual input of thetemperature of the medium into the meter.On model 202710/11 the temperature is compensated automatically by an insertion resistancethermometer (Pt100) which is included as standard.The electronics controlled by a microprocessor provides a high degree of accuracy andlinearity over the full measuring range. The environmentally-friendly lithium battery ensuresan operating life of 5 to 8 years with 2 hours’ use per day. This is ensured through atiming circuit which automatically switches off the instrument 2 hours after switch-on.The minimum and maximum values during a measurement are stored by the instrument.A hold function permits freezing the instantaneous reading.Type 202710/10Applications:k The compact hand-held pH meters are an essential companion for the service engineer duringstart-up, maintenance and checking for environmental installations.k In combination with insertion pH electrodes these instruments can be used for quality controlin the food industry (meat processing, cheese factories, drinks industry etc.)k Further applications are in water monitoring on fish farms or aquaria, in the factory laboratoryor in environmental measurements outdoors.The selection of accessories should depend on the application( see also “Accessories”).Type designationType 202710/11202710 hand-held digital pH meter/10 manual temperaturecompensation/11 automatic temperaturecompensation by Pt100(insertion Pt100 suppliedas standard)Stock instruments (shipment 3 working days after receipt of order)Sales No.Type20/00349524 202710/1020/00349525 202710/1103.03/00353137

M. K. JUCHHEIM GmbH & Co • 36035 Fulda, Germany Data Sheet 20.2710Page 2/3Technical dataInstrument versions202710/10 and 202710/11:pH range0—14pHResolution0.01pHpH accuracy±0.02pH ±1digitUpdate rate1.5sec approx.Operating temperature-10 to +50°CStorage temperature-10 to +60°CSupplylithium battery 3.6V / A, 15AhSonnenschein SL-761/PBattery life5 - 8 years approx.Special functions:– segment test at switch-on– measuring circuit monitor– automatic switch-off after 2 hours– “hold” function(freezing current value)– max/min memorypH electrode connectionBNCCaseDimensions125x54x22mm (LxWxH)MaterialABSProtectionIP54Weight(without sensors)90g approx.Version 202710/11 only:DisplaypH/°C (switched)Temperature range:-10°C to +100°CResolution0.1°CTemperature accuracy±0.3°CTemperature probe (included)Pt100 insertion resistance thermometerwith 1.2m attached cableTemperature probe connectionLemosa size 0, 2-pinVersion 202710/10 only:Temperature setting range(manual temperature compensation)-10°C to +120°CStep size1°CAccessoriesStandard accessoriesk 1 Operating Instructions B 20.2710(in 3 languages: English, French, German)k additionally on Version 202710/11 only:1 insertion resistance thermometer (Pt100 with attached cable)Available accessoriespH electrodes (not included with the instrument)Electrode Type 2GE-4-KCI-CM-2-1-BNC (insertion electrode)Sales No.20/00350517Technical datainsertion tip 6mm dia.2 ceramic diaphragmsKCI reference electrolyte (free from Ag ions)1m attached cableBNC plugApplicationsk food industry for insertion measurement in meat, sausage, cheese, fruit, dough and othersemi-solid foodstuffsk measurement in soilk measurement in small liquid samplesElectrode Type 2GE-4-KCI-U-1-1-BNC (glass combination electrode)Sales No.20/00300196Technical dataspherical membraneceramic diaphragmKCI reference electrolyte (free from Ag ions)1m attached cableBNC plugApplicationsk general aqueous media, drinks industry, factory laboratory, fish farming, aquarium, electroplating,waste water plants, chemicals, pharmaceuticals, drinking waterElectrode Type 2GEP-4-KCI-U-1-1-BNC (plastic shaft)Sales No.20/00300191Technical dataspherical membrane with protection basketglassfibre diaphragmKCI reference electrolyte (free from Ag ions)1m attached cableBNC plugApplicationsk unbreakable plastic shaft with protection basket for heavy-duty applicationsk general aqueous media, drinks industry, factory laboratory, fish farming, aquarium, electroplating,waste water plants03.03/00353137

M. K. JUCHHEIM GmbH & Co • 36035 Fulda, Germany Data Sheet 20.2710Page 3/3Recommended accessoriespH buffer for calibrating the instrumentsType Sales No. NoteBuffer solution pH 4.00 (250ml) 20/00344977Calibration is only possible using these bufferBuffer solution pH 7.00 (250ml) 20/00338371values!Cleaning agents for pH electrodesType Sales No. NoteDiaphragm cleaner 20/00307586 thiourea solutionElectrode cleaner 20/00307114 protein removerKCI solution for refilling the pH electrodesType Sales No. NoteKCI solution 20/00306215 3-molar KCI solution, free from Ag ionsOther accessoriesType Sales No. NotePricking toolfor insertion measurement20/00057928 Pricking in semi-solid materials,e.g. meat, fruit, soil etc.(protects the pH insertion electrode)DimensionsType 2GE-4-KCI-CM-2-1-BNCSales No. 20/00350517Type 2GE-4-KCI-U-1-1-BNCSales No. 20/00300196Type 2GEP-4-KCI-U-1-1-BNCSales No. 20/0030019103.03/00353137