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Preface Instruction Manual Part names and basic operation Dissolved Oxygen Meter ( OM-71G ) Measurement Various functions Maintenance How to resolve errors or troubles Appendix Portable pH ・ Water Quality Meter...
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● Warranty and responsibility HORIBA Advanced Techno Co., Ltd. warrants that the Product shall be free from defects in material and workmanship and agrees to repair or replace free of charge, at option of HORIBA Advanced Techno Co., Ltd., any malfunctioned or damaged Product attributable to responsibility of HORIBA Advanced Techno Co., Ltd.
Check Items Check Items ■ ● Items in package After opening the package, check for damage on the instrument and that the standard accessories (see below) all exist. If damage or defects are found on the product, contact your dealer. Instrument Instruction manual (this book)
Contact your supplier for information on applicable disposal methods. ●Authorised representative in EU HORIBA UK Limited 2 Dalston Gardens, Stanmore, Middx HA7 1BQ, UK...
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Regulations ● FCC rules Any changes or modifications not expressly approved by the party responsible for compliance shall void the user's authority to operate the equipment. ●Warning 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.
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Regulations ● China regulation Meaning of Marking This marking is applied to electric and electronic products sold in the People's Republic of China. The figure at the center of the marking indicates the environmental protection use period in years. (It does not indicate a product guarantee period.) It guarantees that the product will not cause environment pollution nor serious influence on human body and property within the period of the indicated years which is counted from...
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Regulations Name and amount of hazardous substance used in a product Hazardous substance Hexa- Poly Poly Unit name Cad- valent bromo- Lead bromo- cury mium chrom- diphenyl (Pb) biphenyl (Hg) (Cd) ether (PBB) (Cr (VI)) (PBDE) Main unit Battery *1, *2 AC adapter Cable Stand...
For Your Safety For Your Safety ■ ● Hazard classification and warning symbols Warning messages are described in the following manner. Read the messages and follow the instructions carefully. ●Hazard classification This indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. This is to be limited to the most extreme situations.
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For Your Safety ● [FRA] Informations de sécurité Veillez à lire le présent manuel avant d’utiliser le produit de manière à garantir son utili- sation correcte et sûre. De même, rangez le manuel dans un lieu sûr de manière à pou- voir vous y reporter lorsque cela est nécessaire.
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For Your Safety ● [SPA] Información de seguridad Asegúrese de leer este manual antes de utilizar el producto para garantizar un uso correcto y seguro del mismo. Asimismo, guarde de forma segura el manual para que esté disponible siempre que sea necesario. El contenido de este manual están sujetos a cambios sin previo aviso.
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For Your Safety ● [NLD] Veiligheidsinformatie Lees deze handleiding voordat u dit product gebruikt zodat u het op de juiste manier en veilig kunt gebruiken. Bewaar de handleiding goed zodat u hem wanneer nodig kunt raadplegen. De inhoud van deze handleiding kunnen zonder voorafgaande kennisgeving worden gewijzigd.
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For Your Safety ● Safety precautions This section provides precautions for using the product safely and correctly and to prevent injury and damage. The terms of DANGER, WARNING, and CAUTION indicate the degree of imminency and hazardous situation. Read the precautions carefully as it contains important safety messages.
Product Handling Information Product Handling Information ■ ● Operational precautions (instrument) ・Only use the product including accessories for their intended purpose. ・The function that measuring dissolved oxygen of the instrument is only usable for measuring under water. Do not use this function for the application except described above.
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Product Handling Information ・If the power supply is interrupted while measurement data is being saved in the instrument, the data could be corrupted. ・A Ni-MH rechargeable battery can be used in this instrument, but the battery used in the instrument cannot be charged using the AC adapter. ●...
Manual Information Manual Information ■ ● Description in this manual Note This interprets the necessary points for correct operation and notifies the important points for handling the product. Reference This indicates the part where to refer for information. This indicates reference information. ●...
Contents ■ Preface...................I ■ Check Items .................II ■ Regulations .................III ■ For Your Safety..............VII ■ Product Handling Information......... XII ■ Manual Information ............XIV Part Names and Basic Operation ........1 ■ Names of each part .............2 ● Instrument..................2 ●...
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Contents Using Various Functions........... 27 ● Saving measurement data in the internal memory....28 ● Displaying saved data .............. 29 ● Deleting all saved data ............. 30 ● Deleting calibration data ............31 ● Printing measured values and calibration data ..... 32 ●...
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Contents ● The indicated value fluctuates..........50 ● The response is slow..............50 ● The indicated value does not change/No response ....51 ● The measured value blinks ............51 ● Repeatability of the measured value is poor......51 ● The temperature display blinks or is fixed at 25°C ....52 ●...
Part Names and Basic Operation This section describes the name of each part and the main role, function, and basic operation method of each part. ■ Names of each part..............2 ● Instrument....................2 ● Display....................3 • Battery level display ....................4 ●...
Names of each part Names of each part ■ ● Instrument Name Function Display Displays the measured value and set value and so on. Operation keys Used for instrument operation. Electrode connector Connects the BNC connector of the electrode. Temperature connector Connects the temperature connector of the electrode.
Names of each part ● Display Name Function Displays the current operation mode, electrode Status icon status, printer or PC connection status, and remaining battery level. Direction key icon Displays the currently available direction key. Date and time, set item Displays the current date and time and the set display area items.
Names of each part • Battery level display Battery level is high. Battery level is a little lower. Battery level is low. The backlight may become unavailable. Battery has run out. Replace the batteries. "ERR No. 0002" is displayed and operation is disabled.
Names of each part ● Operation key Name Function Changes the operation mode to the measurement mode during operation in a different mode. The changes you made using the setting mode are reflected when you press MEAS key this key to return to the measurement mode. In the measurement mode, switches the automatic hold measurement on/off.
Basic operation Basic operation ■ ● Changing the operation mode This instrument is operated by changing the operation mode from four available modes, depending on the purpose of use. The status icon indicates the current mode. You can change the operation mode using the corresponding key. However changing to the calibration, data, or setting mode is available only from the measurement mode.
Basic operation ● Changing the measurement parameter This instrument can measure multiple parameters. In the measurement mode, the measurement parameter can be changed by pressing the key. ● Using the backlight When it is difficult to see the screen in a dark location, you can turn on the backlight by pressing the key.
Basic operation ● Entering numeric values When entering numeric values to make various settings and set a calibration value, you can change the selected digit using the keys and increment or decrement the value (0 to 9) using the keys.
Measurement This section describes the basic measuring method of each measurement parameter. ■ Preparation ................. 12 ● Confirmation before starting measurement ........12 ● Turning ON the instrument..............13 • Inserting the batteries ..................13 • Using the AC adapter (option) ................14 •...
Preparation Preparation ■ ● Confirmation before starting measurement ・ Have you prepared the appropriate electrode for the measurement parameter? ⇒ If not, purchase the appropriate electrode. ・ Is the prepared electrode in good condition? ⇒ If the responsive part is stained or damaged, it may not be possible to obtain ...
Preparation ● Turning ON the instrument • Inserting the batteries This instrument is operated by batteries. You can use AAA alkaline batteries or AAA Ni- MH rechargeable batteries. Perform the following procedure to insert batteries in the instrument. 1. Turn the knob on the battery cover on the back of the instrument counterclockwise to unlock the battery cover.
Preparation • Using the AC adapter (option) It is possible to use the AC adapter to operate the instrument. Perform the following procedure to connect AC adapter to the instrument. The AC adapter is an option. To purchase it, contact your dealer. (Refer to “ Options ” (page 61).) 1.
Preparation ● Setting the date and time When using the instrument for the first time or after replacing the batteries, set the date and time. After setting, the date and time data is displayed correctly when saving data in the internal memory. If the setting is incorrect, the date and time of saved data becomes incorrect.
Preparation To change to the setting again, press the key to return to the "DATE" (date and time setting) screen. The settings on screen before the key is pressed are not saved. ● Connecting an electrode To perform measurement, you must use the appropriate electrode for measurement parameters.
Dissolved oxygen measurement Dissolved oxygen measurement ■ You can use the DO electrode to measure the dissolved oxygen, oxygen concentration, and saturated oxygen concentration of a sample. Oxygen concentration and saturated oxygen concentration are calculated from the measured value of dissolved oxygen. Press the key to select the measurement parameter (“...
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Dissolved oxygen measurement 3. Press the keys to select the "ATC" (automatic temperature compensation) or the "MTC" (manual temperature compensation) and then press the key. 4. If you select the "MTC", enter the temperature to be compensated for and then press the key.
Dissolved oxygen measurement • Setting salinity correction (default: 0.0 PPT) Because dissolved oxygen is affected by the salinity concentration, you need to correct it at measurement. Set the salinity concentration of the sample beforehand. You can select arbitrary numeric value or sea concentration (35.0 PPT). If the measured target does not contain saline matter, set to 0.0 PPT.
Dissolved oxygen measurement • Setting air pressure correction (default: 1013 hPa) Amount of oxygen that can be dissolved in water is affected by air pressure in the loca- tion where measurement is taking place. You need to set the air pressure of the mea- surement location to the instrument before calibration to correct the pressure influence, and then perform measurement.
Dissolved oxygen measurement • Setting the industrial standard (default: ISO) The instrument can be adaptable to the industrial standards of ISO17289 (JIS K0102), JIS K0101, JIS K0102 before 2015, and JIS K0803. When evaluating with ISO17289 (JIS K0102), select "ISO". When evaluation with JIS K0101, JIS K0102 before 2015, and JIS K0803 select "Pre".
Dissolved oxygen measurement ● Performing calibration Calibration of the DO electrode is required for accurate measurements. According to the following procedure, perform calibration correctly. You can perform air one-point calibration and two-point calibration using the standard solution with this instrument. We recommend that calibration be performed once a day before the first measurement.
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Dissolved oxygen measurement 3. Hold the DO electrode still in clean air and press the key. Stabilization judgment starts and the HOLD icon blinks. When the value is stabilized, the HOLD icon changes from the blinking state to the lit state and the calibrated value is displayed (the calibrated value differs depending on the conditions because it is affected by temperature and air pressure).
Dissolved oxygen measurement • Performing calibration using the standard solution If high precision measurement is necessary, perform two-point calibration using the standard solution. 1. Wash the membrane at the tip of the DO electrode with pure water (or deionized water) and wipe it with a soft cloth at least 10 minutes before calibration.
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Dissolved oxygen measurement 6. While the DO electrode is immersed in the standard solution, press the key. Stabilization judgment starts and the HOLD icon blinks. When the value is stabilized, the HOLD icon changes from the blinking state to the lit state and calibration to the standard solution value is performed.
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Dissolved oxygen measurement You can cancel calibration by pressing the key while the HOLD icon is blinking. Note ・ The zero standard solution and the span standard solution are determined automatically by the instrument. Also, the order of calibration is free. ・...
Dissolved oxygen measurement ● Performing measurement You can perform measurement in the measurement mode by immersing the DO electrode in the sample. Also, you can use the automatic hold function to perform stability judgment of the measured value. 1. Press the key to change the parameter to measure.
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Note The criteria of stability judgment in the automatic hold measurement are as follows. Dissolved oxygen: display value change for 10 seconds is less than 0.03 mg/L and temperature change is less than 2.0°C Oxygen concentration: display value change for 10 seconds is less than 0.1% and temperature change is less than 2.0°C ...
Using Various Functions This section describes functions available in this instrument. ● Saving measurement data in the internal memory ......30 ● Displaying saved data................. 31 ● Deleting all saved data................ 32 ● Deleting calibration data..............33 ● Printing measured values and calibration data........ 34 ●...
Saving measurement data in the internal memory ● Saving measurement data in the internal memory Up to 1000 data items measured by the instrument can be stored in the internal memory of the instrument. The measurement data is saved in the internal memory in the measurement mode, except during the automatic hold measurement.
Displaying saved data ● Displaying saved data You can display the data saved in the internal memory. 1. Press the key to enter the data mode. 2. Press the keys to select "OUT" (display saved data) and then press the key.
Deleting all saved data ● Deleting all saved data You can delete all data saved in the internal memory. However, you cannot delete a data individually. Copy or transfer necessary data to a PC for storage. 1. Press the key to enter the setting mode. 2.
Deleting calibration data ● Deleting calibration data You can delete the calibration data set in the instrument. 1. Press the key to enter the setting mode. 2. Press the keys to select the "MAINT" (maintenance setting) and then press key. 3.
Printing measured values and calibration data ● Printing measured values and calibration data You can print out the measured value or calibrated value displayed on the instrument, or the measurement data or the calibration data saved in the instrument. If repeatability inspection has been inspected, the inspection data is printed out with the calibration data.
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Printing measured values and calibration data < The data saved in internal memory > Printout format Description Memory Num : 0001 Data number Date : 2013/09/01 Measurement date Time : 09:00 Measurement time Channel Measurement channel : 1.03 mg/L Measured value HOLD status HOLD : INST...
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Printing measured values and calibration data < Calibration data (standard solution calibration) > Printout format Description Inst. model : OM-71 * Instrument model (*Suffix G is not printed.) Inst. SN : KL1TSE08 Instrument serial number Calibration mode CAL MODE : Solution Air calibration: Air Standard solution calibration: Solution Calibration data...
Transferring saved data to a PC ● Transferring saved data to a PC By using a serial cable (“ Options ” (page 61)) to connect the instrument to a PC, you can transfer the saved data to the PC and edit it. Connect the serial connector at the instrument side to the serial port on the PC.
Operating the instrument from an external device ● Operating the instrument from an external device You can remotely operate the instrument from an external device (ex. PC) via the RS- 232C communication. Use the serial cable to connect the serial connector on the instrument side and the serial port on the PC.
Using the automatic data save (default: OFF) ● Using the automatic data save (default: OFF) You can automatically save data in the internal memory at the specified interval. While using this function, the automatic power off setting is disabled. If the batteries run out while using the automatic data save function, the data saved until just before the batteries run out.
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Using the automatic data save (default: OFF) 4. Press the key to enter the measurement mode. When this setting is "ON", "AUTO LOG", which indicates that the automatic data save function is on, is displayed. 5. Pressing the key starts saving the data (when the setting is "ON"). Pressing the key again stops the data saving process.
Setting the ID number (default: 000) ● Setting the ID number (default: 000) You can set an ID number to differentiate the sample of the data to be saved. When the data is saved in the internal memory, the ID number entered in this setting is saved together with the data.
Calibrating temperature sensor ● Calibrating temperature sensor The temperature sensor or temperature compensation electrode in the combination electrode has ±1°C accuracy without calibration. You can use a known temperature solution to calibrate the temperature sensor. 1. Immerse the electrode into the solution until the temperature sensor is immersed.
Changing the automatic power off setting (default: OFF) ● Changing the automatic power off setting (default: OFF) You can set the instrument to automatically turn OFF when there is no key operation for a certain period of time. This function is disabled during automatic data memory saving or remote operation using an external device.
Performing test printing of the printer unit ● Performing test printing of the printer unit In order to check whether the printer unit is operating correctly or there is a printer communication problem, you can perform test printing. Connect the instrument and a printer correctly and perform the following procedure for test printing.
Resetting to factory default settings ● Resetting to factory default settings The instrument settings can be reset to the factory default settings. The calibration data is deleted but the data of date and time, and the saved data are not deleted. Make sure there will be no problems before using this function.
To use them for a long period, perform the described maintenance procedures appropriately. ● Contact for maintenance Manufacturer: HORIBA Advanced Techno Co., Ltd. 31, Miyanonishi-cho, Kisshoin Minami-ku, Kyoto 601-8306, Japan ● Maintenance and storage of the instrument ・...
Maintenance and storage of the DO electrode ● Maintenance and storage of the DO electrode For the detailed procedures for maintaining and storing electrodes, refer to the instruction manual for each electrode. This section describes an overview of the procedures for maintenance and storage to be performed as part of daily use. •...
When an error message appears How to Resolve Errors or Troubles This section describes the causes of typical problems and the actions to be taken, including questions frequently asked by customers. Check these before contacting us. When an error message appears ■...
When an error message appears ● ERR No.0003 Electrode stability error Detected an electrode error because the electrical potential does not stabilize after 3 or more minutes during measurement or calibration. Cause How to solve problem The stability of electrode is Read the value without using the automatic hold function.
When an error message appears ● ERR No.0010 Memory full Attempted to save more than 1000 items of data. Cause How to solve problem The maximum number of savable items of data is 1000. Saving more than 1000 items of Copy or transfer necessary data to a PC and delete the data is attempted.
Troubleshooting Troubleshooting ■ This section describes causes and actions to take for problems that customers frequently ask us. ● The indicated value fluctuates < There is a problem with the electrode > Cause How to solve problem The responsive membrane is Wash the responsive membrane.
Troubleshooting ● The indicated value does not change/No response Cause How to solve problem The responsive membrane is Replace the electrode chip. damaged or worn out. The electrode is not connected Connect the electrode correctly. correctly. Turn off the power, remove the batteries, and then turn Keys are locked.
Troubleshooting ● The temperature display blinks or is fixed at 25°C The measured value blinks when it is out of the measurement range. Cause How to solve problem Sample temperature is out of the Set to a temperature within the measurement range. measurement range.
Troubleshooting ● Part of the display is missing If part of the display is missing, it is the Instrument defect. Contact your dealer. 1. Press the key to enter the setting mode. 2. Press the keys to select the "MAINT" (maintenance setting) and then press key.
This section describes the specifications of the instrument, default settings, measurement principles, and other technical information. Options for the instrument are also described. Main specifications ■ Item Contents Model OM-71G Brand (pet name) LAQUAact Series name Portable pH Water Quality Meter Model description...
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Main specifications ・ Specification of each measurement parameter Measurement Item Description parameter Measuring principle Thermistor method 30.0°C to 130.0°C Display range Temperature Measuring range 0.0°C to 100.0°C Resolution 0.1°C Repeatability ±0.1°C ±1 digit Measuring principle Membrane galvanic cell Measuring range 0.00 mg/L to 20.00 mg/L Dissolved (Display range)
Instrument default settings Instrument default settings ■ Measurement Selection item/Setting Item Default values range parameter Automatic (ATC)/ Temperature setting Automatic (ATC) Manual (MTC) Temperature input value 0.0°C to 100.0°C 25.0°C Auto power off ON/OFF Common Auto power off time 1 min to 30 min 30 min Sample ID 000 to 2999...
Technical note Technical note ■ ● Dissolved oxygen measurement Dissolved oxygen (DO) is the concentration of oxygen that is dissolved in water. DO is essential in the self-cleaning mechanism of rivers and seas and for fish and other aquatic animals. The measurement of DO is also essential for waste-water treatment and water- quality management.
Technical note ● Salinity concentration correction When a solution is in contact with air and is in a state of perfect equilibrium (a state of saturation), the relationship between the DO contained within the solution C (mg/L) and the partial pressure of the oxygen in the air Ps (MPa) is shown by the following equation. The H in this equation is referred to as the “Henry constant”...
Options Options ■ A wide variety of electrodes and options are available for use with the instrument. You can select the optimum electrode and options for your application and objectives. These options can be purchased from your nearest agency. Please provide the part name and part number to the representative.
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31, Miyanonishi-cho, Kisshoin Minami-ku, Kyoto 601-8306, Japan http://www.horiba-adt.jp For any questions regarding this product, please contact your local agency, or inquire from the following website. http://global.horiba.com/contact_e/index.htm...
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