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Summary of Contents for wtw 330i
- Page 1 Operating manual Handheld meter pH 330i/340i pH measuring instrument ba52310e03 03/2004...
- Page 2 © Copyright Weilheim 2004 WTW GmbH Reproduction in whole - or even in part - is prohibited without the ex- press written permission of WTW GmbH, Weilheim. Printed in Germany.
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Page 3: Table Of Contents
330i/340i List of contents Overview ........5 SETs of equipment . - Page 4 List of contents pH 330i/340i Lists ........61...
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Page 5: Overview
Note If you need further information or application notes, you can obtain the following material from WTW: l Application reports l Primers l Safety datasheets. You will find information on available literature in the WTW catalog or via the Internet. -
Page 6: Sets Of Equipment
SETs of equipment The measuring instrument is also available as part of individual SETs of equipment. You will find additional information on this and other ac- cessories in the WTW catalog or via the Internet. Set (sample configuration): Measuring instrument, pH 330i/340i Stand –... -
Page 7: Keypad
330i/340i Overview Keypad RUN/ENTER Key functions Select the measuring mode <M>: – pH value – ORP voltage Save a measured value <STO> Switch measuring instrument on/off <ON/OFF> Calibration of the current measured variable; <CAL> Display/transmit measured values <RCL> Activate/deactivate the AutoRead function <AR>... -
Page 8: Display
Warning Only connect electrodes to the measuring instrument that cannot return any voltages or currents that are not allowed (> SELV and > current circuit with current limiting). Nearly all electrodes - especially WTW electrodes - fulfill these condi- tions. -
Page 9: Safety
330i/340i Safety Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the pH meter. Consequently, all responsible personnel must read this operating man- ual before working with the measuring system. The operating manual must always be available within the vicinity of the measuring system. -
Page 10: General Safety Instructions
Safety pH 330i/340i General safety instructions This instrument is built and inspected according to the relevant guide- lines and norms for electronic measuring instruments (see chapter 7 ECHNICAL DATA It left the factory in a safe and secure technical condition. -
Page 11: Commissioning
330i/340i Commissioning Commissioning Scope of delivery l Handheld meter, pH 330i or 340i l Plug-in power supply, optional (340i only) l Operating manual and short operating manual l 4 batteries, 1.5 V Mignon type AA (in the instrument) Initial commissioning... - Page 12 R e f Plug the jack (1) into the socket (2) of the measuring instru- ment. Connect the original WTW plug-in power supply (3) to an easily accessible mains socket. Note You can also measure without the plug-in power supply.
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Page 13: Operation
330i/340i Operation Operation Switching on the measuring instrument Press the <ON/OFF> key. The display test appears briefly on the display. Subsequently, the slope and asymmetry used appear for ap- prox. one second one after the other. In addition, the calibration... -
Page 14: Measuring
Operation pH 330i/340i Measuring 4.2.1 General information You can measure the following variables: l pH value l ORP voltage Preparatory activities Perform the following preparatory activities when you want to measure: Connect the electrode to the measuring instrument. Adjust the temperature of the buffer solutions or test solutions, or measure the current temperature, if you measure without a temperature sensor. -
Page 15: Measuring The Ph Value
330i/340i Operation The temperature measurement is absolutely essential for a reproduc- ible pH measurement. If the measurement is made without a tempera- ture sensor, proceed as follows: Measure the current temperature of the test sample using a thermometer. Enter the temperature on the instrument: Set the temperature value of the test sample using <... - Page 16 Operation pH 330i/340i AutoRead The AutoRead function (drift control) checks the stability of the mea- (drift control) surement signal. The stability has a considerable impact on the repro- ducibility of the measured values. For identical measurement conditions, the following criteria apply:...
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Page 17: Measuring The Orp Voltage
330i/340i Operation 4.2.3 Measuring the ORP voltage In conjunction with an ORP electrode, e.g. SenTix ORP, the measuring instrument can measure the ORP voltage (U) of a solution. Perform the preparatory activities according to section 4.2.1. Immerse the ORP electrode in the test sample. -
Page 18: Calibrating
ONFIGURATION You can select between 3 calibration procedures: AutoCal TEC is specially adapted to the WTW technical buffer solutions as a fully au- tomatic two-point or three-point calibration. The buffer solutions are automatically recognized by the measuring instrument. Depending on the instrument setting (see section 4.6 C... - Page 19 330i/340i Operation AutoRead When calibrating with AutoCal TEC and AutoCal DIN, the AutoRead function is automatically activated. The current AutoRead measurement can be terminated at any time (accepting the current value) by pressing <RUN/ENTER>. Displaying calibration Each time the instrument is switched on, the calibration data are shown data on the display for a short time (see section 4.1 S...
- Page 20 Operation pH 330i/340i Calibration evaluation After the calibration, the measuring instrument automatically evaluates the current status of the electrode. The asymmetry and slope are eval- uated separately. The worst evaluation appears on the display. Display Asymmetry Slope [mV] [mV/pH] -15 ... +15 -60.5 ...
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Page 21: Autocal Tec
330i/340i Operation 4.3.1 AutoCal TEC For this procedure, use any two or three WTW technical buffer solu- tions in ascending or descending order (pH values at 25 °C: 2.00 / 4.01 / 7.00 / 10.01). Note The calibration for pH 10.01 is optimized for the WTW technical buffer solution TEP 10 Trace or TPL 10 Trace. - Page 22 Operation pH 330i/340i mV/pH mV/pH mg/l mg/l mbar mbar 1/ cm Time Baud Time Baud ° ° Day.Month No. Day.Month No. ° ° Year Ident Year Ident Tref20 AutoCal DIN Auto Store Tref20 AutoCal DIN Auto Store Tref25 Tref25 ARng...
- Page 23 330i/340i Operation mV/pH mV/pH mg/l mg/l mbar mbar 1/ cm Time Baud Time Baud ° ° Day.Month No. Day.Month No. ° ° Year Ident Year Ident Tref20 AutoCal DIN Auto Store Tref20 AutoCal DIN Auto Store Tref25 Tref25 ARng...
- Page 24 Operation pH 330i/340i Three-point calibration Press the <RUN/ENTER> key to continue the three-point calibration. Ct3 appears on the display. Thoroughly rinse the electrode with distilled water. If necessary, enter the temperature of the third buffer solution with < > < >.
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Page 25: Autocal Din
330i/340i Operation 4.3.2 AutoCal DIN For this procedure, use two or three different standard buffer solutions according to DIN 19266 in ascending or descending order (type A, C, D or F with pH values at 25 °C of: 1.679 / 4.006 / 6.865 / 9.180). - Page 26 Operation pH 330i/340i mV/pH mV/pH mg/l mg/l mbar mbar 1/ cm Time Baud Time Baud ° ° Day.Month No. Day.Month No. ° ° Year Year Ident Ident Tref20 Auto Tref20 Auto Tref25 AutoCal DIN Store Tref25 AutoCal DIN Store ARng...
- Page 27 330i/340i Operation mV/pH mV/pH mg/l mg/l mbar mbar 1/ cm Time Baud Time Baud ° ° Day.Month No. Day.Month No. ° ° Year Ident Year Ident Tref25 Tref20 AutoCal DIN Auto Store Tref25 Tref20 AutoCal DIN Auto Store LoBat...
- Page 28 Operation pH 330i/340i Three-point calibration Press the <RUN/ENTER> key to continue the three-point calibration. Cd3 appears on the display. Thoroughly rinse the electrode with distilled water. If necessary, enter the temperature of the third buffer solution with < > < >.
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Page 29: Concal
330i/340i Operation 4.3.3 ConCal Single-point calibration Use any buffer solution for this rapid method. The calibration will be the more exact the nearer the pH value of the buffer solution is to that of the test sample. Two-point calibration For this procedure, use two buffer solutions: l pH 7.0 ±... - Page 30 Operation pH 330i/340i Note At this point, the ConCal calibration can be broken off with <M>. This corresponds to a single-point calibration. For this, the instrument uses the Nernst slope (-59.2 mV/pH at 25 °C) and the specified asym- metry of the electrode.
- Page 31 330i/340i Operation Press the <RUN/ENTER> key. The value of the asymmetry (mV) appears on the display. To return to the measuring mode: Press the <M> key.
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Page 32: Saving
Operation pH 330i/340i Saving The measuring instrument has an internal data memory. It can store up to 800 data records. A complete data record consists of: l Storage location l Date/time l Measured value l Temperature l Temperature measuring procedure... - Page 33 330i/340i Operation mol/L mV/pH % ppm mg/L °F Time Baud Day.Month °C Year Ident CalError TempError AutoCal DIN Auto Store LoBat ARng AR AutoCal TEC ConCal Using < > < >, enter the required ID number (1 ... 999).
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Page 34: Saving Automatically
Operation pH 330i/340i 4.4.2 Saving automatically The save interval (Int 1) determines the chronological interval between automatic save processes. After the fixed interval has expired, the current data record is transmit- ted to the storage and to the interface. Setting the save The default setting for the save interval (Int 1) is OFF. - Page 35 330i/340i Operation As soon as all of the 800 storage locations are occupied, AutoStore is terminated (Int 1 = OFF). If there are not enough storage locations available for your measurements: – Output and backup the data storage (see page 36) and –...
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Page 36: Outputting The Data Storage
Operation pH 330i/340i 4.4.3 Outputting the data storage You can output the contents of the data storage: l Stored data on the display l Calibration data on the display l Stored data on the serial interface (only pH 340i) l Calibration protocol to the interface (only pH 340i) Outputting stored data Press the <RCL>... - Page 37 330i/340i Operation Note If you want to search for a certain element (e.g. date), proceed as fol- lows: Using <RUN/ENTER>, select the element (e.g. date). Press < > or < > repeatedly until the required date appears on the display.
- Page 38 Operation pH 330i/340i Sample printout: Device No.: 12345678 09.03.99 17:10 pH 10.01 °C Tman Ident : 1 09.03.99 17:11 pH 10.01 24.7 °C Tauto Ident : 1 09.03.99 17:12 305 mV Tauto Ident : 13 Outputting the Press the <RCL> key repeatedly until CAL dISP appears on calibration data the display.
- Page 39 330i/340i Operation Press <RUN/ENTER> to display the value of the asymmetry (mV) in the calibration range I. In two-point calibration: Using <M> or <RUN/ENTER>, you can switch back to the pH measuring mode. In three-point calibration: Press <RUN/ENTER> to display the slope [mV/pH] in the cali- bration range II (SLO2).
- Page 40 Operation pH 330i/340i Outputting the calibra- Press the <RCL> key repeatedly until CAL appears on the dis- tion protocol on the play. interface (only pH 340i) mol/L mV/pH % ppm mg/L °F Time Baud Day.Month °C Year Ident CalError TempError...
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Page 41: Clearing The Memory
330i/340i Operation 4.4.4 Clearing the memory With this function, you can delete stored data records. 800 storage lo- cations will then be available again. Note The Clear memory function only appears when there are data records stored in the memory. Otherwise, the measuring instrument automati- cally switches to the measuring mode. -
Page 42: Transmitting Data (Only Ph 340I)
Operation pH 330i/340i Transmitting data (only pH 340i) You have the following possibilities of transmitting data: l One of the following options: – With the AutoStore function (page 34), measured values are periodically saved internally (save interval Int 1) and output on the interface. - Page 43 330i/340i Operation Setting the The default setting for the interval is OFF. Data transmission To start the data transmission, set an interval (5 s, 10 s, 30 s, 1 min, interval 5 min, 10 min, 15 min, 30 min, 60 min): Press the <RUN/ENTER>...
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Page 44: Recorder (Analog Output, Ph 340I)
Operation pH 330i/340i 4.5.2 Recorder (analog output, pH 340i) You can transmit data to a recorder via the analog output. Connect the analog output to the recorder via the AK323 interface cable. The data output automatically switches to Recorder output. -
Page 45: Pc/External Printer (Rs 232 Interface, Ph 340I)
330i/340i Operation 4.5.3 PC/external printer (RS 232 interface, pH 340i) Via the RS 232 interface, you can transmit the data to a PC or an ex- ternal printer. Use the AK340/B (PC) or AK325/S (ext. printer) cable to connect the interface to the instruments. -
Page 46: Configuration
Operation pH 330i/340i Configuration You can adapt the measuring instrument to your individual require- ments. To do this, the following parameters can be changed (the status on delivery is marked in bold): Baud rate 1200, 2400, 4800, 9600 Display during the... - Page 47 330i/340i Operation Display during the pH calibration Select the required display during the pH calibration with < > < >. mV: Display of the current electrode voltage /pH: Display of the buffer nominal value. Confirm with <RUN/ENTER>. Int 3 appears on the display.
- Page 48 Operation pH 330i/340i Set the date of the current day with < > < >. Confirm with <RUN/ENTER>. The date (month) flashes in the display. Set the current month with < > < >. Confirm with <RUN/ENTER>. The year appears on the display.
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Page 49: Reset
330i/340i Operation Reset You can reset (initialize) the measurement parameters and the config- uration parameters separately from one another. Measurement The following measured parameters (pH InI) are reset to the default parameters condition: Measuring mode Asymmetry 0 mV Slope -59.16 mV/pH... - Page 50 Operation pH 330i/340i mV/pH % mg/l mbar Time Baud ° Day.Month No. ° Year Ident Tref25 Tref20 AutoCal DIN Auto Store ARng LoBat AutoCal TEC Using < > < >, switch between no and YES. YES: Resetting the measuring parameters no: Retaining settings.
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Page 51: Maintenance, Cleaning, Disposal
330i/340i Maintenance, cleaning, disposal Maintenance, cleaning, disposal Maintenance The measuring instrument is almost maintenance-free. The only maintenance task is replacing the batteries. LoBat indicates that the batteries should be changed. The batteries are then largely depleted. Replacing the batteries Open the housing after the instrument has been switched off: –... -
Page 52: Cleaning
Maintenance, cleaning, disposal pH 330i/340i Note For the maintenance of the electrodes, follow the corresponding oper- ating manual. Cleaning Occasionally wipe the outside of the measuring instrument with a damp, lint-free cloth. Disinfect the housing with isopropanol as re- quired. -
Page 53: What To Do If
330i/340i What to do if... What to do if... Error message 0FL Cause Remedy pH electrode: – Not connected – Connect electrode – Air bubble in front of the – Remove air bubble diaphragm – Air in the diaphragm –... - Page 54 What to do if... pH 330i/340i Buffer solutions – Incorrect buffer solutions – Change calibration procedure – Buffer solutions too old – Use only once. Note the shelf life – Buffer solutions depleted – Change solutions No stable measured Cause...
- Page 55 330i/340i What to do if... Obviously incorrect Cause Remedy measured values pH electrode: – pH electrode unsuitable – Use suitable electrode – Temperature difference – Adjust temperature of buffers between buffer and test or test samples sample too high –...
- Page 56 What to do if... pH 330i/340i You would like to know Cause Remedy which software version – e.g. question of the WTW – Press the key and switch is in the instrument service department on instrument. The software version is displayed.
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Page 57: Technical Data
330i/340i Technical data Technical data Dimensions and weight Length [mm] Width [mm] Height [mm] Weight [kg] Approx. 0.3 Mechanical structure Type of protection IP 66 Electrical safety Protective class Test certificates cETLus, CE Ambient Storage - 25 °C ... + 65 °C... - Page 58 Technical data pH 330i/340i pH temperature input: Manually [°C] - 20 ... + 130 Analog output Automatic switchover when the recorder is connected by the cable, (only pH 340i) AK 323. Output signals Corresponds to the electrode voltage, i.e. 50-62 mV/pH unit Accuracy ±...
- Page 59 330i/340i Technical data Type RS 232, data output Baud rate Selectable 1200, 2400, 4800, 9600 baud Cable length Max. 15m Power supply Batteries 4x1.5V alkali-manganese batteries, Type AA Operational life Approx. 3000 operating hours Mains (only pH 340i) The following specifications apply to all plug- in power supplies: Connection max.
- Page 60 Technical data pH 330i/340i FCC Class A Equipment Statement Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
- Page 61 330i/340i Lists Lists This chapter provides additional information and orientation aids. Abbreviations The list of abbreviations explains the indicators and the abbreviations that appear on the display and in the manual. Specialist terms The glossary briefly explains the meaning of the specialist terms. How- ever, terms that should already be familiar to the target group are not described here.
- Page 62 Asymmetry AutoCal DIN Automatic pH calibration with buffer solutions pre- pared according to DIN 19 266 AutoCal TEC Automatic pH calibration with WTW technical buff- er solutions according to DIN 19267 °C Temperature unit, degrees Celsius Calibration Cd... Display indicator during calibration for pH mea- surements.
- Page 63 330i/340i Lists Slope (internat. k) SELV Safety Extra Low Voltage Slope setting on calibration Temperature measurement active (Temperature Probe) Asymmetry...
- Page 64 AutoRange Name of the automatic selection of the measuring range. AutoRead WTW name for a function to check the stability of the measured value. Calibration Comparing the value from a measuring system (e. g. the displayed value) to the correct value or a value that is regarded as correct. Of- ten, this expression is also used when the measuring system is adjust- ed at the same time (see adjusting).
- Page 65 330i/340i Lists Offset potential The measurable potential of a symmetrical electrode, the membrane of which is immersed in a solution with the pH of the nominal electrode zero point. The asymmetry is part of the offset potential. ORP voltage...
- Page 66 Lists pH 330i/340i...
- Page 67 330i/340i Index Index Analog output Operating safety Asymmetry ORP electrode Authorized use ORP voltage 18, 25 AutoCal DIN 18, 21 AutoCal TEC AutoRead Printing calibration protocol Calibrating Calibration evaluation Remote control Calibration procedures Replacing the batteries Calibration protocol (340i)