Operating manual pH/Oxi 3400i 79 17 M 2 6 ARng O mg °C /l TP STO CAL O RCL AR pH/Oxygen measuring instrument ba75686e01 01/2007
Accuracy when going to press Warranty The use of advanced technology and the high quality standard of our instruments are the result of continuous development. This may result in differences between this operating manual and your instrument. 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/Oxi 3400i Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 1.2 1.3 1.4 1.5 1.6 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1 2.2 3 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 12 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.1 3.2 4 General features . .
Contents pH/Oxi 3400i 5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 61 5.1 5.2 5.3 6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 6.1 6.2 6.3 4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 pH system messages . . . . . . . . . . . . .
pH/Oxi 3400i Overview 1 Overview 1.1 General features This compact precision handheld meter enables you to carry out pH / ORP measurements and oxygen measurements rapidly and reliably. The handheld meter provides the maximum degree of operating comfort, reliability and measuring certainty for all applications. The proven MultiCal® calibration procedures and the special AutoRead function support you in your work with the handheld meter.
Overview pH/Oxi 3400i 1.2 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 accessories in the WTW catalog or via the Internet.
pH/Oxi 3400i Overview Set (sample configuration): 1 pH/Oxi 3400i measuring instrument 2 50 ml ELY/G electrolyte solution for D.O. probes 3 Stand 4 RL/G cleaning solution for D.O. probes, 50 ml 5 50 ml pH buffer solution, STP 4 6 50 ml pH buffer solution, STP 7 7 Storing solution for pH electrodes 8 CellOx 325 D.O. probe with calibration vessel 9 SF300 abrasive film for D.O.
Overview pH/Oxi 3400i 1.3 Keypad M STO CAL RCL AR RUN/ENTER Key functions M Select the measured variable : – pH value / ORP voltage – D. O.
pH/Oxi 3400i Overview 1.4 Display Status display TDS UpH O Sal mV/pH % mg/l m S/cm mbar M cm 1/ cm Sal °F° % /K TP S Probe symbol 1888 Baud Time Day.Month No. Year Ident 8 8 .8 Tref25 Tref20 LoBat nLF Lin Cal 1.5 AutoCal DIN AutoCalTEC Meas. value display Function and temperature display C Auto Store ARng AR RCL Jack field 5 4 1 2 3 1 D. O.
Overview pH/Oxi 3400i 1.6 Operating structure The following overview diagram shows which keys you have to press to select between the different measuring modes: Note When connecting a D. O.probe with temperature sensor, the measuring instrument recognizes the probe and automatically switches to the last selected D. O. measuring mode. As soon as the probe is disconnected, the instrument switches to the pH or ORP measuring mode.
pH/ 3400i Safety 2 Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the measuring instrument. Consequently, all responsible personnel must read this operating manual before working with the measuring system. The operating manual must always be available within the vicinity of the measuring system. Target group The measuring instrument was developed for work in the field and in the laboratory.
Safety pH/ 3400i 2.2 General safety instructions This instrument is built and inspected according to the relevant guidelines and norms for electronic measuring instruments (see chapter 7 TECHNICAL DATA). It left the factory in a safe and secure technical condition.
pH/ 3400i Commissioning 3 Commissioning 3.1 Scope of delivery z 3400i handheld meter z Plug-in power supply (optional) z Operating manual and short operating manual z 4 batteries, 1.5 V Mignon type AA (in the instrument) For details of scope of delivery of SETs, see chapter 1.2 SETS OF EQUIPMENT and WTW catalog. 3.
Commissioning Connecting the original plug-in power supply unit pH/ 3400i 13 Confirm with . The instrument switches to a measuring mode. 14 Switch the instrument off using . You can either operate the measuring instrument with batteries or with the plug-in power supply. The plug-in power supply supplies the measuring instrument with low voltage (12 VDC). This saves the batteries.
pH/ 3400i Operation 4 Operation 4.1 Switching on the measuring instrument 1 Measuring mode when switching on Press the key. The display test appears briefly on the display. After this, the measuring instrument automatically switches to the measuring mode. Connected sensor Measuring mode No sensor or pH/ORP electrode pH or ORP measurement (depending on the last setting) D. O.
Operation Preparatory activities pH/ 3400i 4.2 pH value / ORP voltage 4.2.1 General information Perform the following preparatory activities when you want to measure: 1 Connect the pH electrode to the measuring instrument. If necessary, press the key repeatedly until the status display pH (pH measurement) or U (measurement of the ORP voltage) appears.
pH/ 3400i Temperature measurement in pH measurements Operation You can perform pH measurements with or without a temperature sensor as well as with the temperature sensor of a D. O. probe. The measuring instrument recognizes which sensors are connected and automatically switches to the correct mode for the temperature measurement. The following cases are distinguishable.
Operation pH/ 3400i 4.2.2 Measuring the pH value 1 Perform the preparatory activities according to section 4.2.1. 2 Immerse the pH electrode in the test sample. 3 Press the <▲> <▼> keys until pH appears in the status display. The pH value appears on the display. TDS U pHO S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1699 Baud Time Day.Month No.
pH/ 3400i Operation 3 Start AutoRead with . AR flashes until a stable measured value is reached. This measured value is transmitted to the interface. 4 If necessary, start the next AutoRead measurement with . 5 To terminate the AutoRead function: Press the key. Note The current AutoRead measurement can be terminated at any time (accepting the current value) by pressing .
Operation pH/ 3400i 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 (mV) of a solution. 1 Perform the preparatory activities according to section 4.2.1. 2 Submerse the ORP electrode in the sample. 3 Press the <▲> <▼> keys until the U status display appears. The ORP voltage (mV) of the test sample appears on the display. 4 Wait for a stable measured value.
pH/ 3400i Operation 4.3 Why calibrate? When to calibrate? pH calibration pH electrodes age. This changes the asymmetry (zero point) and slope of the pH electrode. As a result, an inexact measured value is displayed. Calibration determines the current values of the asymmetry and slope of the electrode and stores them in the measuring instrument. Thus, you should calibrate at regular intervals.
Operation pH/ 3400i Note You can automatically print a calibration protocol after the calibration. To do so, connect a printer to the interface according to section 4.7.2 before calibrating. After a valid calibration, the record is printed. Sample printout: CALIBRATION PROTOCOL 02.03.01 14:19 Device No.: 12345678 Calibration pH Cal time: 01.03.01 / 15:20 Cal interval: 7d AutoCal TEC Tauto Buffer 1 2.00 Buffer 2 4.01 Buffer 3 7.00 * Buffer 4 10.00 C1 184.1 mV 25.0°C C2 3.0 mV 25.0°C S1 -59.
pH/ 3400i Operation Preparatory activities 1 Connect the pH electrode to the measuring instrument. If necessary, press the key repeatedly until the status display pH (pH measurement) or U (measurement of the ORP voltage) appears. 2 Keep the buffer solutions ready. 3 Adjust the temperature of the solution and measure the current temperature if the measurement is made without the use of a temperature sensor (the TP display indicator is missing from the display). 4.3.
Operation pH/ 3400i TDS U pHO Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP S 1C t 1 Baud Time Day.Month No. Year Ident 8248 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 2 If required, enter the temperature of the first buffer solution with <▲> <▼> while keeping the key depressed. 3 Immerse the pH electrode in the first buffer solution. 4 Press the key. The AR display indicator flashes.
pH/ 3400i Operation strument uses the Nernst slope (-59,2 mV/pH at 25 °C) and determines the asymmetry of the electrode. 6 Thoroughly rinse the electrode with deionized water. 7 If required, enter the temperature of the second buffer solution with <▲> <▼> while keeping the key depressed. 8 Immerse the pH electrode in the second buffer solution. 9 Press the key. The AR display indicator flashes. The electrode voltage (mV) or the buffer nominal value appears on the display.
Operation pH/ 3400i TDS U pHO S Sal mV % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1602 Baud Time Day.Month No. Year Ident 8ASY C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 12 26 Switch to the measuring mode with .
pH/ 3400i Operation 4.3.2 AutoCal DIN For this procedure, use two different standard buffer solutions according to DIN 19266 (type A, C, D or F with pH values at 25 °C of: 1.679 / 4.006 / 6.865 / 9.180). Note Skip the steps 2 and 7 if you use a pH electrode with a temperature sensor or the temperature sensor of a D. O.probe. 1 Press the key repeatedly until the display Cd1 and the function display AutoCal DIN appear.
Operation pH/ 3400i 5 When the measured value is stable, Cd2 appears. TDS U pHO Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP S 1C d2 Baud Time Day.Month No. Year Ident 8248 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL Note At this point, the AutoCal DIN calibration can be terminated with . This corresponds to a single-point calibration.
pH/ 3400i Operation 10 When the measured value is stable, AR disappears. The value of the slope (mV/pH) appears on the display. The probe symbol shows the evaluation of the current calibration. TDS U pHO S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1594 Baud Time Day.Month No. Year Ident SLO C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 11 Press the key. The value of the asymmetry (mV) appears on the display.
Operation pH/ 3400i 4.3.3 Two-point calibration ConCal For this procedure, use two buffer solutions: z pH 7.0 ± 0.5 z any other buffer solution Note Skip the steps 2 and 8 if you use a pH electrode with a temperature sensor or the temperature sensor of a D. O.probe. 1 Press the key repeatedly until the ASY display and the Cal function display appears.
pH/ 3400i Operation TDS U pH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1SL O Baud Time Day.Month No. Year Ident 8248 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 8 Thoroughly rinse the electrode with deionized water. 9 If required, enter the temperature of the second buffer solution with <▲> <▼> while keeping the key depressed. 10 Immerse the pH electrode in the second buffer solution. 11 Press the key.
Operation pH/ 3400i TDS U pHO S Sal mV % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1603 Baud Time Day.Month No. Year Ident 8ASY C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 15 32 Switch to the measuring mode with .
pH/ 3400i Operation 4.4 Dissolved oxygen 4.4.1 General information Note D. O. measurements with the pH/ Oxi3400i can only be carried out using a CellOx 325 or StirrOx G D. O. probe. The stirrer of the StirrOx G D. O. probe has to be supplied with voltage separately using the NT/pH Mix 540 power supply. You can measure the following variables: z D. O. concentration z D. O.
Operation Temperature sensor pH/ 3400i The D. O. probe has an integrated temperature sensor that always measures the current temperature of the test sample. 4.4.2 Measuring the D. O. concentration When measuring the concentration of test samples with a salt content of more than 1 g/l, a salinity correction is required. Note How to enter the current salt content is described in section 4.4.6 ENTERING THE SALT CONTENT (SALINITY) on page 40. Switching the salt content correction on or off, see below.
pH/ 3400i Operation TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1542 Baud Time Day.Month No. Year Ident 8176 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 3 4.4.3 While pressing the key, switch off the salt content correction with <▼>. The SAL display indicator is no longer displayed. Measuring the D. O. saturation You can measure the D. O. saturation as follows: 1 Perform the preparatory activities according to section 4.4.
Operation pH/ 3400i 4.4.4 AutoRead AR (Drift control) The AutoRead function (drift control) checks the stability of the measurement signal. The stability has a considerable impact on the reproducibility of the measured values. 1 Call up the measuring mode with and/or <▲> <▼> . 2 Activate the AutoRead function with . The current measured value is frozen (hold function). 3 Start AutoRead with . AR flashes until a stable measured value is reached.
pH/ 3400i Operation 4.4.5 Why calibrate? When to calibrate? D. O. calibration D. O. probes age. This changes the slope of the D. O. probe. Calibration determines the current slope of the probe and stores this value in the instrument. z After connecting another D. O. probe z When the probe symbol flashes (after the calibration interval has expired).
Operation pH/ 3400i Sample printout: CALIBRATION PROTOCOL 02.03.01 14:19 Device No.: 12345678 CALIBRATION 02 Cal time: 02.03.01 / 14:19 Cal interval: 14d OxiCal Tauto AR Relative Slope: 0,88 Probe: +++ Probe evaluation After the calibration, the measuring instrument evaluates the current status of the probe against the relative slope. The evaluation appears on the display. The relative slope has no effect on the measuring accuracy.
pH/ 3400i Operation 3 Put the D. O. probe into the air calibration vessel. 4 Press the key repeatedly until the calibration mode appears. The sensor symbol displays the evaluation of the last calibration (or no sensor symbol in the delivery state or after the measurement parameter has been reset). TDS UpH O S 1C AL Baud Time Day.Month No.
Operation pH/ 3400i Note In chapter 6 WHAT TO DO IF... from page 63, you will find the measures to take for error elimination. 4.4.6 Entering the salt content (salinity) A salt content correction is required in the oxygen concentration measurement of test samples with a salt content of more than 1 g/l. To do this, you have to enter the salinity equivalent of the test sample (range 0.0 - 70.0) and to switch on the salinity correction. Entering the salinity 1 Determine the salinity of the test sample.
pH/ 3400i Operation 4.5 Calibration intervals (Int 3, Int 4) For each measured variable, a time interval is stored. When it has expired, you will be reminded to calibrate. After a calibration interval has expired, the probe symbol of the relevant measured variable flashes. It is still possible to measure. By calibrating the relevant probe, the function is reset and the interval starts anew.
Operation pH/ 3400i 4.6 Saving The measuring instrument has an internal data memory. It can store up to 500 data records. A complete data record consists of: z Number of the storage location z Date/time z Measured values of the probes connected z Temperature z Temperature measuring procedure z ID number You can transmit measured values (data records) to the data storage in two ways: z Save manually z Switch on AutoStore (Int 1), (see page 44). 4.6.
pH/ 3400i Operation TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1699 Baud Time Day.Month No. Year Ident 8172 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL Message StoFull 3 Using <▲> <▼>, set the required ID number (1 ... 999). 4 Confirm with . The measured values are stored. The instrument changes to the measuring mode. This message appears when all of the 500 storage locations are occupied.
Operation pH/ 3400i 4.6.2 Switching on AutoStore (Int 1) The save interval (Int 1) determines the chronological interval between automatic save processes. After the fixed interval has expired, the current data record is transmitted to the internal storage and to the interface. Setting the save interval The default setting for the save interval (Int 1) is OFF. By this, the AutoStore function is switched off.
pH/ 3400i Operation TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1999 Baud Time Day.Month No. Year Ident Fr e1 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 6 Set the required ID number with <▲> <▼>. 7 Confirm with . The measuring instrument switches to the last active measuring mode and starts the measuring and saving procedure. AutoStore flashes on the display.
Operation pH/ 3400i 4.6.3 Outputting the data storage You can output the contents of the data storage: z Stored data on the display z Calibration data on the display z Stored data on the serial interface z Calibration protocol to the interface Outputting stored data on the display 1 Press the key repeatedly until StO dISP appears on the display. ISE UpH mol/L mV/pH % ppm mg/L S 1 0 s T O°F Baud Time Day.Month No.
pH/ 3400i Operation Note If you want to search for a certain element of the data record (e.g. date), proceed as follows: Outputting stored data to the interface 1 Using , select the element (e.g. date). 2 Press <▲> or <▼> repeatedly until the required element appears on the display. After approx. 2 s the temperature of the displayed measured value appears. 1 Press the key repeatedly until Sto SEr appears on the display. ISE UpH mol/L mV/pH % ppm mg/L S 1 0 s T O°F Baud Time Day.
Operation pH/ 3400i Sample printout: No. 1: 09.03.99 pH 10.01 Tman Ident : 1 17:10 25 °C AR No. 2: 09.03.99 pH 10.01 Tauto Ident : 1 17:11 24.7 °C AR No. 3: 09.03.99 305.2 mV Tauto Ident : 13 17:12 ... Outputting the calibration data on the display 1 Press the key repeatedly until CAL disp appears on the display. TDS UpH O S 1C AL Baud Time Day.Month No.
pH/ 3400i Operation 3 Press to display the value of the asymmetry (mV). TDS U pHO S Sal mV % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1601 Baud Time Day.Month No. Year Ident 8ASY C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 4 Press to display the relative slope of the D. O. probe. TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1088 Baud Time Day.Month No.
Operation Outputting the calibration protocol on the interface pH/ 3400i 1 Press the key repeatedly until CAL SEr appears on the display. TDS UpH O S 1C AL Baud Time Day.Month No. Year Ident Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP dSER C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 2 Press the key. The calibration protocol for all measured variables is transmitted to the interface.
pH/ 3400i Operation 4.6.4 Clearing the memory With this function, you can delete stored data records. 500 storage locations 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 automatically switches to the last active measuring mode. Proceed as follows to clear all data records: 1 Switch off the measuring instrument. 2 Press the key and hold it down. 3 Press the key.
Operation pH/ 3400i 4.7 Transmitting data You have the following possibilities of transmitting data: z One of the following options: – With the AutoStore function (page 44), measured values are periodically saved internally (save interval Int 1) and output on the interface. – With the Data transmission interval function (Int 2), measured values are periodically output on the interface (see below).
pH/ 3400i Operation 4 Confirm with . The measuring instrument switches to the last active measuring mode. Note When the AutoStore function is active at the same time, the data transmission is performed according to the setting of the save interval (Int 1). Set the save interval (Int 1) to OFF to activate the Data transmission interval (Int 2). 4.7.2 PC/external printer (RS232 interface) Via the RS 232 interface, you can transmit the data to a PC or an external printer.
Operation pH/ 3400i 4.7.3 Remote control The measuring instrument can be remotely controlled from a PC. This requires the KOM pilot communication kit. It is available as an accessory. The instrument is then controlled via commands that simulate keystrokes and request the current display contents. Note A more detailed description is provided within the scope of delivery of the communication kit.
pH/ 3400i Operation 4.8 Configuration You can adapt the measuring instrument to your individual requirements. 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 pH calibration Buffer nominal value, or current electrode voltage Air pressure display Current value in mbar (no input possible) Intervals Calibration (Int 3) in days (d) – pH: 1 ... 7 ... 999 d Int 3 – O2 1 ... 14 ...
Operation pH/ 3400i TDS pH O S 1C AL Baud Time Day.Month No. Year Ident Sal mV/pH /pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP disp C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL Displaying the air pressure 6 Select the required display during the pH calibration with <▲> <▼>. mV: Display of the current electrode voltage /pH: Display of the buffer nominal value. 7 Confirm with . On the display, P mbar and the current air pressure appears.
pH/ 3400i Operation TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1nt 4 Baud Time Day.Month No. Year Ident d114 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 11 Set the required interval (in days) with <▲> <▼>. 12 Confirm with . The date flashes on the display. Date and time TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1Dis Baud Time Day.Month No.
Operation pH/ 3400i 4.9 Reset You can reset (initialize) the measurement parameters and the configuration parameters separately from one another. Measurement parameters pH Oxi The following measuring parameters are reset to the delivery status: Measuring mode pH Slope -59.16 mV/pH Asymmetry 0 mV Manual temperature input 25 °C Measuring mode D. O. concentration Relative slope 1.00 Salinity (value) 0.
pH/ 3400i Resetting the measuring parameters Operation 1 Press the key and hold it down. 2 Press the key. The setting to reset the pH measuring parameters appears on the display. pHO TDS S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1In I Baud Time Day.Month No. Year Ident 4Yno C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 3 Using <▲> <▼>, toggle between no and YES.
Operation Resetting the configuration parameters pH/ 3400i TDS S pH O Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1In I Baud Time Day.Month No. Year Ident 88no C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 60 7 Using <▲> <▼>, toggle between no and YES. YES: Resetting the configuration parameters no: Retaining settings. 8 Confirm with . The measuring instrument automatically switches to the last active measuring mode.
pH/ 3400i Maintenance, cleaning, disposal 5 Maintenance, cleaning, disposal 5.1 Maintenance The measuring instrument is almost maintenance-free. The only maintenance task is replacing the batteries. LoBat on the display indicates that the batteries should be changed. The batteries are then largely depleted. Replacing the batteries 2 1 1 Open the housing after the instrument has been switched off: – Undo the four screws on the underside of the instrument – Pull down the lower cover (1).
Maintenance, cleaning, disposal pH/ 3400i Note For maintenance of electrodes and sensors, follow the corresponding operating manual. 5.2 Cleaning Occasionally wipe the outside of the measuring instrument with a damp, lint-free cloth. Disinfect the housing with isopropanol as required. Warning The housing is made of a synthetic material (ABS). Thus, avoid contact with acetone and similar detergents that contain solvents. Remove any splashes immediately. 5.
pH/ 3400i Error message 0FL What to do if... 6 What to do if... 6.
What to do if... pH/ 3400i Buffer solutions No stable measured value – Incorrect buffer solutions – Change calibration procedure – Buffer solutions too old – Use only once.
pH/ 3400i What to do if... 6.2 Error message 0FL Oxi system messages Cause Remedy Display range exceeded D. O. probe: Error message E3 – Not connected – Connect the probe – Cable broken – Replace probe – Depleted – Replace probe – Short-circuit between gold and lead electrode – Clean probe and replace it if necessary Cause Remedy Invalid calibration D. O.
What to do if... pH/ 3400i Measured value too low Measured value too high Cause Remedy – Insufficient flow – Provide flow to the probe Cause Remedy – High amount of dissolved substances – Correct solubility function using the salinity equivalent – Air bubbles bump on the membrane with high velocity – Avoid direct flow to the membrane – The carbon dioxide pressure is too high (> 1 bar) – Measuring not possible 6.
pH/ 3400i Technical data 7 Dimensions and weight Mechanical structure Electrical safety Ambient conditions pH/ORP measuring ranges Precision of pH/ORP (± 1 digit) pH temperature input: Technical data Length [mm] 172 Width [mm] 80 Height [mm] 37 Weight [kg] Approx. 0.3 Type of protection IP 66 Protective class III Storage - 25 °C ... + 65 °C Operation -10 °C ... + 55 °C Climatic class 2 Measuring range Resolution pH - 2.00 ... + 19.99 0.01 U [mV] - 1999 ...
Technical data pH/ 3400i Oxi measuring ranges mg/l % Measuring range I Resolution 0 ... 19.99 0.01 0 ... 199.9 0.1 Measuring range II Resolution 0 ... 90.0 0.1 0 ... 600 1 Temperature resolution Precision of Oxi (± 1 digit) Correction functions of Oxi 68 0.1 °C - 5,0 ... + 105.0 0.1 Concentration ± 0.5 % of the measured value at an ambient temperature of 5 °C ... 30 °C Saturation ± 0.
pH/ 3400i Technical data Serial interface Power supply Type RS232, data output Baud rate Selectable 1200, 2400, 4800, 9600 baud Data bits 8 Stop bit 2 Parity None Handshake RTS/CTS + Xon/Xoff Cable length Max. 15m Batteries 4 x 1.5 V alkali-manganese batteries, type AA Operational life Approx. 3000 operating hours Mains (optional) The following specifications apply to all plug-in power supplies: Max.
Technical data Guidelines and norms used pH/ 3400i EMC E.C. guideline 89/336/EEC EN 61326-1:1997 EN 61000-3-2 A14:2000 EN 61000-3-3:1995 FCC Class A Instrument safety E.C. guideline 73/23/EEC EN 61010-1 A2:1995 Climatic class VDI/VDE 3540 Type of protection EN 60529:1991 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.
pH/ 3400i Lists 8 Lists This chapter provides additional information and orientation aids. Abbreviations Specialist terms Index The list of abbreviations explains the indicators and the abbreviations that appear on the display and in the manual. 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 will help you to find the topics that you are looking for.
Lists pH/ 3400i Abbreviations 72 AR AutoRead (drift control) ARng Automatic range switching Measuring instrument measures with highest resolution ASY Asymmetry AutoCal TEC Automatic pH calibration with WTW technical buffer solutions according to DIN 19267 °C Temperature unit, degrees Celsius Cal Calibration Cm... Display indicator during calibration for pH measurements.
pH/ 3400i Lists TP Temperature measurement active (Temperature Probe) UASY Asymmetry 73
Lists pH/ 3400i Glossary Adjusting To manipulate a measuring system so that the relevant value (e. g. the displayed value) differs as little as possible from the correct value or a value that is regarded as correct, or that the difference remains within the tolerance. Amperometry Name of a measuring technique. The signal (depending on the measured parameter) of the probe is the electric current. The electrical voltage remains constant. Asymmetry Designation for the offset potential of a pH electrode.
pH/ 3400i Lists Measured value The measured value is the special value of a measured parameter to be determined. It is given as a combination of the numerical value and unit (e. g. 3 m; 0.5 s; 5.2 A; 373.15 K). Measuring system The measuring system comprises all the devices used for measuring, e. g. measuring instrument and probe. In addition, there is the cable and possibly an amplifier, terminal strip and armature.
Lists pH/ 3400i Slope (relative) Standard solution Temperature coefficient Designation used by WTW in the D. O. measuring technique. It expresses the relationship of the slope value to the value of a theoretical reference probe of the same type of construction. The standard solution is a solution where the measured value is known by definition. It is used to calibrate a measuring system. Value of the slope of a linear temperature function.
pH/Oxi 3400i Index A Asymmetry 21 Auslieferzustand 58 Authorized use 11 AutoCal DIN 21, 27 AutoCal TEC 21, 23 AutoRead 18 D. O. 36 M T Measuring mode when switching on 15 Measuring the D. O. concentration 34 Measuring the D. O. saturation 35 Temperature sensor 34 pH 17 Two-point calibration ConCal 30 two-point calibration 21 Two-point calibration (pH) 21, 25, 28, 30 C Calibration evaluation 22 Dissolved oxygen 38 Calibration interval 41 Calibration procedures 21 Calibration protocol 21 D. O.
Index 78 pH/Oxi 3400i
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