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wtw inoLab pH 720, Руководство по эксплуатации

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Operation

pH 720

 20

Calibration

evaluation

After the calibration, the instrument automatically evaluates 
the current status. The asymmetry and slope are separately 
evaluated. The worst evaluation appears on the display.

Display

Asymmetry 

[mV]

Slope 

[mV/pH]

-15 ... +15

-60.5 ... -58

-20 ... +20

-58 ... -57

-25 ... +25

-61 ... -60.5 
or
-57 ... -56

Clean the electrode accord-
ing to the sensor operating 
manual

-30 ... +30

-62 ... -61
or
-56 ... -50 

E3

Clear the fault according to 
chapter 6 W

HAT TO DO IF

...

< -30 or 
> 30

< -62 or 
> -50 

1 Switch on the instrument by pressing 

e

.

2 Connect the pH electrode to the instrument.

3 Keep the buffer solutions ready.

4 Adjust the temperature of the solutions and measure 

the current temperature if the measurement is per-
formed without a temperature probe.

Preparatory

activities

Содержание inoLab pH 720

Страница 1: ......

Страница 2: ...of purchase The instrument warranty extends to manufacturing faults that are determined within the period of warranty The warranty excludes components that are replaced during maintenance such as bat...

Страница 3: ...2 Initial commissioning 13 4 Operation 15 4 1 Switch on the instrument 15 4 2 Measuring 16 4 2 1 Measuring the pH value 17 4 2 2 Measuring the Redox voltage 18 4 3 Calibrating 19 4 3 1 AutoCal TEC 21...

Страница 4: ...Contents pH 720 4...

Страница 5: ...bility and measuring safety for all applications The proven MultiCal calibration procedures and special AutoRead function support your work with the pH meter Note The measuring instrument can also be...

Страница 6: ...board 1 Activate deactivate AutoRead function 2 Call up calibration procedure 3 Select measuring mode 4 Measuring instrument ON OFF 5 Reduce values scroll 6 Increase values scroll 7 Confirm inputs sta...

Страница 7: ...or currents SELV and circuit with cur rent limiter Almost all commercial electrodes especially WTW elec trodes meet these requirements Connectors 1 pH electrode 2 Temperature probe 3 Reference electro...

Страница 8: ...Overview pH 720 8...

Страница 9: ...in the lab oratory Thus we assume that as a result of their professional train ing and experience the operators will know the necessary safety precautions to take when handling chemicals Symbols used...

Страница 10: ...hnical condition Function and opera tional safety The smooth functioning and operational safety of the instru ment can only be guaranteed if the generally applicable safety measures and the specific s...

Страница 11: ...or a lengthy period of time the instrument is visibly damaged the instrument no longer operates as described in this manual If you are in doubt contact the supplier of the instrument Obligations of th...

Страница 12: ...Safety pH 720 12...

Страница 13: ...the C or F Set the resolution Connect the plug in power supply optional Setting C or F The temperature can be displayed in C or in F In the de livery condition the measuring instrument is preset to C...

Страница 14: ...r supply unit see chapter 7 TECHNICAL DATA Caution Use original plug in power supplies only see chapter 7 TECHNICAL DATA 1 Press and hold down the g key 2 Press the m key The measured values are displ...

Страница 15: ...n hour The energy saving feature is not active if the instrument is supplied by the plug in power supply 1 Place the instrument on a flat surface and protect it against intense light and heat 2 Press...

Страница 16: ...odes with the NTC30 or Pt1000 The temperature measurement is absolutely essential for a reproducible pH measurement If the measurement is made without a temperature probe proceed as follows Note When...

Страница 17: ...e preparatory activities according to sec tion 4 2 2 Immerse the pH electrode into the test sample 3 Press the m key until pH appears in the status dis play The pH value appears on the display 1 Call...

Страница 18: ...tion when connected with a Redox electrode e g SenTix ORP Note Redox electrodes are not calibrated However you can check Redox electrodes using a test solution 1 Perform the preparatory activities acc...

Страница 19: ...d ASY2 S2 are determined for the two ranges between the three buff ers For measuring the calibration values relevant for the respective range are used You can choose between 3 calibration procedures A...

Страница 20: ...58 57 25 25 61 60 5 or 57 56 Clean the electrode accord ing to the sensor operating manual 30 30 62 61 or 56 50 E3 Clear the fault according to chapter 6 WHAT TO DO IF 30 or 30 62 or 50 1 Switch on t...

Страница 21: ...o an erroneous calibration The correct buffer solutions are given in the WTW catalog or in the Internet Note Steps 2 6 and 13 are not required if you use a temperature probe 1 Press the c key repeated...

Страница 22: ...ution by pressing 28 7 Submerse the electrode in the second buffer solution 8 Press the g key AR flashes on the display The electrode voltage mV appears on the display As soon as a stable value is rec...

Страница 23: ...the third buffer solution by pressing 28 14 Submerse the electrode in the third buffer solution 15 Press the g key AR flashes on the display The electrode voltage mV appears on the display As soon as...

Страница 24: ...6 and 13 are not required if you use a temperature probe 1 Press the c key repeatedly until the AutoCal DIN function display appears 2 If necessary set the temperature of the buffer solu tion by pres...

Страница 25: ...ion by pressing 28 7 Submerse the electrode in the second buffer solution 8 Press the g key AR flashes on the display The electrode voltage mV appears on the display As soon as a stable value is recog...

Страница 26: ...third buffer solution by pressing 28 14 Submerse the electrode in the third buffer solution 15 Press the g key AR flashes on the display The electrode voltage mV appears on the display As soon as a s...

Страница 27: ...n display appears 2 If necessary set the temperature of the buffer solu tion by pressing 28 3 Submerse the pH electrode in the pH 7 0 0 5 buffer solution 4 Press the g key The measured pH value appear...

Страница 28: ...0 Submerse the electrode in the second buffer solution 11 Press the g key The second measured pH value appears on the dis play 12 Set the nominal pH value of the second buffer solu tion at the current...

Страница 29: ...probe The TP display indicates an active temperature measurement 1 Press the c key repeatedly until the ConCal func tion display appears 2 Set the temperature of the buffer solution by pressing 28 3...

Страница 30: ...suring mode pH Asymmetry 0 mV Slope 59 16 mV pH Calibration procedure AutoCal TEC Temperature manual 25 C Resolution of pH display 0 01 1 Press and hold down the g key 2 Press the c key 3 Toggle betwe...

Страница 31: ...round The signs in the battery compartment must correspond to the signs on the batteries Only use leakproof alkaline manganese batteries Note See the relevant operating manual of the electrode for in...

Страница 32: ...ts the instrument against damage during transport Batteries This note refers to the battery regulation that applies in the Federal Republic of Germany We would ask end consum ers in other countries to...

Страница 33: ...pH electrode Diaphragm contaminated Clean diaphragm Membrane contaminated Clean membrane Moisture in the plug Dry plug Electrolyte obsolete Replenish electrolyte or replace electrode Electrode obsole...

Страница 34: ...inated Clean diaphragm Membrane contaminated Clean membrane Sample pH value not stable Measure with air excluded if necessary Temperature not stable Adjust temperature if necessary Electrode sample Co...

Страница 35: ...st temperature of buffers or samples Measuringprocedurenot suitable Follow special procedure Cause Remedy Operating state undefined or EMC electric stress unallowed Processor reset Press the a key and...

Страница 36: ...What to do if pH 720 36...

Страница 37: ...V 999 9 999 9 1999 1999 T C 5 0 105 0 T F 23 0 221 0 pH in the measuring range of 2 pH units around the calibration point 0 005 at operating temperature 15 C 35 C 0 01 U mV 0 3 at 15 C 35 C 1 T C NTC...

Страница 38: ...lug in power supplies Plug in power supply unit Euro US UK Australian plug FRIWO FW7555M 09 15 1432 Friwo Part No 1822089 Input 100 240 V 50 60 Hz 400 mA Output 9 V 1 5 A EMC E C guideline 89 336 EEC...

Страница 39: ...inst harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance wi...

Страница 40: ...Technical Data pH 720 40...

Страница 41: ...ns explains abbreviations that appear on the display or when dealing with the instrument Specialist terms The glossary briefly explains the meaning of the specialist terms However terms that should al...

Страница 42: ...ions Cal Calibration Cd Calibration with DIN buffer solutions acc to DIN 19 266 ConCal Conventional one two point calibration Ct Calibration with WTW technical buffer so lutions E3 Error message see W...

Страница 43: ...pH 720 Lists 43 SLO Slope Slope setting on calibration TP Temperature probe Temperature measurement active UASY Asymmetry potential C Temperature unit Celsius F Temperature unit Fahrenheit...

Страница 44: ...able solution with a precisely known pH value Diaphragm Contact point between the reference electrolytic solution and the sample Drift control See AUTOREAD MultiCal Group term for the various WTW cali...

Страница 45: ...ages 33 I initial commissioning 13 initialize 30 K keys 6 L LoBat 34 O operational safety 10 P place of the instrument 15 plug in power supply 14 R Redox electrode 18 Redox voltage 18 replacing the ba...

Страница 46: ...46 Lists pH 720...

Страница 47: ......

Страница 48: ...Wissenschaftlich Technische Werkst tten GmbH Dr Karl Slevogt Stra e 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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