horiba U-51 Instruction Manual
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horiba U-51 Instruction Manual

U-50 series multi-paramenter water quality checker
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CODE : GZ0000230552H

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  • Page 1 CODE : GZ0000230552H...
  • Page 2 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.
  • Page 3 Contact your supplier for information on applicable disposal methods.  Authorised Representative in EU HORIBA Europe GmbH Hans-Mess-Str.6, D-61440 Oberursel, Germany...
  • Page 4 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.
  • Page 5 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 DANGER avoided, will result in death or serious injury. This is to be limited to the most extreme situations.
  • Page 6 [DEU] Sicherheitsinformation Lesen Sie vor der Verwendung des Produkts unbedingt diese Anleitung, um den ordnungsge- mäßen und sicheren Betrieb des Produkts zu gewährleisten. Bewahren Sie die Anleitung sicher auf, damit sie bei Bedarf jederzeit zur Hand ist. Die technischen Daten und das Erscheinungsbild des Produkts sowie der Inhalt dieser Anlei- tung können unangekündigt geändert werden.
  • Page 7 [FRA] Informations de sécurité Veillez à lire le présent manuel avant d’utiliser le produit de manière à garantir son utilisation correcte et sûre. De même, rangez le manuel dans un lieu sûr de manière à pouvoir vous y reporter lorsque cela est nécessaire. Les spécifications et l’aspect du produit, ainsi que le contenu du présent manuel peuvent être modifiés sans notification préalable.
  • Page 8 [ITA] Informazioni sulla sicurezza Leggere attentamente questo manuale prima di utilizzare il prodotto al fine di utilizzarlo in modo sicuro e adeguato. Inoltre, conservare in un luogo sicuro il manuale per poterlo consul- tare se necessario. Le specifiche e l'aspetto del prodotto, nonché i contenuti di questo manuale, sono soggetti a modifica senza preavviso.
  • Page 9 [SWE] Säkerhetsinformation Se till att du läser denna handbok innan du börjar använda produkten för en korrekt och säker användning av den. Spara sedan handboken på en säker och lättåtkomlig plats så att du kan konsultera den när så behövs. Produktspecifikationerna och utseendet, samt även innehållet i denna handbok, kan komma att ändras utan föregående meddelande därom.
  • Page 10 [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 aspecto y las especificaciones del producto, así como el contenido de este manual, están sujetos a cambios sin previo aviso.
  • Page 11 [POL] Informacje dotyczące bezpieczeństwa Przed przystąpieniem do użytkowania tego produktu należy dokładnie zapoznać się z niniej- szą instrukcją, aby zapewniona była prawidłowa i bezpieczna eksploatacja produktu. Instruk- cję przechowywać w bezpiecznym miejscu, aby w razie potrzeby była zawsze dostępna. Specyfikacja i wygląd produktów oraz treść niniejszej instrukcji może ulec zmianie bez wcze- śniejszego powiadomienia.
  • Page 12 [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 specificaties en het uiterlijk van het product en de inhoud van deze handleiding kunnen zonder voorafgaande kennisgeving worden gewijzigd.
  • Page 13 [JPN] 安全情報 ご使用になる前に、 本書を必ずお読みください。 お読みになった後は必要なときにすぐに取り 出せるように大切に保管してください。 ご使用の際、 安全に関してお気付きの点がありましたら、 弊社にご連絡ください。 製品の仕様 ・ 外観は、 改良のため予告なく変更することがあります。 また、 本書に記載されている内容も予告なく変更される場合があります。 あらかじめご了承く ださい。  設置環境 本製品は、 EN61326-1で定義される工業環境で使用することを想定した製品ではありません。 工業環境においては、 電磁妨害の影響を受ける可能性があり、 その場合には使用者が適切な対 策を講ずることが必要となることがあります。  警告の種類と表示方法 本書および製品では、 以下のような警告表示をしています。 内容をよく理解して、 正しく安全 にご使用ください。 取り扱いを誤った場合、 使用者が死亡または重傷を負うことがあり、 か 危　険 つその切迫の度合いが高いもの 取り扱いを誤った場合、 使用者が死亡または重傷を負う可能性が想定さ 警　告 れるもの...
  • Page 14 3200647816 [ENG] FALLING WARNING Do not attach the hook to the body. The probe may be caught by a strong current and you may fall into the water. In addition, if the distance to the water surface is large or the flow is fast, attach FALLING the hook to a place where it can be fastened firmly.
  • Page 15 [SWE] FALLANDE VARNING Fäst inte kroken i kroppen. Sonden kan dras med av en stark ström och du kan falla i vattnet. Fäst dessutom kroken på en plats där den kan fästas ordentligt om avståndet till FALLANDE vattenytan är stort eller flödet är stritt. [SPA] CAÍDA No coloque el gancho en el cuerpo.

  • Page 16: Safety Precautions

    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.
  • Page 17 Product Handling Information Operational precautions Use of the product in a manner not specified by the manufacturer may impair the protection provided by the product. And it may also reduce product performance. Exercise the following precautions:  General Only use the product including accessories for their intended purpose. ...
  • Page 18  Control unit Do not subject to strong shocks.  The operation keys are designed to operate using the pad of a finger, sharp objects can  tear the control unit cover damaging the operation keys. Operation keys The control unit is no longer waterproof when the USB cable is connected. ...
  • Page 19  Measurement Before lowering the sensor probe into the sample, do not connect the hook on the unit to  a human body. The correct values are not displayed if the sensor is not mounted when the measurement  display is activated. Perform DO measurement with no air bubbles in the internal solution.
  • Page 20 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. Original language This is the English translation of an original Japanese document.

  • Page 21: Table Of Contents

    Contents About this Unit ........Device Information.
  • Page 22 3.7.2 Commands ..........Maintenance.
  • Page 23 6.9.2 Standard solution ........6.10 Depth (DEPTH) measurement .

  • Page 25: About This Unit

    1 About this Unit About this Unit The U-50 Series Multi Water Quality Checker features an integrated control unit and sensors. It is capable of making a maximum of eleven simultaneous measurements for various parameters, and is perfect for use in the field. The U-50 Series is designed with on-site ease- of-use in mind, provides a wide variety of functions, and can be used for water quality measurements and inspections of river water, groundwater, and waste water.

  • Page 26: Device Information

    2 Device Information Device Information Measurement parameters Model Parameters U-51 U-52 U-52G U-53 U-53G U-54 U-54G pH (pH)        pH (mV)        Oxidation reduction potential (ORP)  ...

  • Page 27: Packing List

    2 Device Information Packing list Parts Name Quantity Note Control unit Sensor probe pH sensor (#7112) ORP sensor (#7313) Reference electrode (#7210) DO sensor (#7543) Turbidity sensor (#7800) With U-52/U-52G only. Attached to the sensor probe. Turbidity sensor (#7801) With U-53/U-53G only. Attached to the sensor probe. Turbidity sensor (#7802) With U-54/U-54G only.

  • Page 28: Parts Name And Functions

    2 Device Information Parts name and functions Display  GPS unit (U-52G, U-53G, U-54G) Display screen Battery cover USB connector Operation key Front view Back view Sensor probe (U-51)  COND sensor Temp. sensor DO sensor　 Reference electrode pH sensor ORP sensor...
  • Page 29 2 Device Information Sensor probe (U-52)  TURB sensor Temp. sensor COND sensor DO sensor　 Reference electrode pH sensor ORP sensor Sensor probe (U-53, U-54)  TURB sensor Temp. sensor COND sensor DO sensor　 Reference electrode pH sensor ORP sensor Display screen ...
  • Page 30 2 Device Information Operation key  Key name description Turns the system’s power ON/OFF. The initial screen appears immediately after turning the power ON. POWER key Press the POWER key for about 1 second to turn the power ON and OFF. When pressed in the measurement screen, used to set the measurement values of all the measurement parameters.

  • Page 31: Setting Menu Items

    2 Device Information Setting menu items Single measurement “ 3.2.1 Setting measurement Measurement Interval measurement methods ” (page 18) Select site “ 3.2.2 Setting sites ” (page 20) Create new site Site Delete site TEMP (temperature) TURB (turbidity) Unit for report “...

  • Page 32: Basic Operation

    3 Basic Operation Basic Operation System setup 3.1.1 Inserting and replacing the batteries The control unit is shipped without batteries. Follow the steps below to insert the batteries when using the system for the first time or replacing old batteries. 1.
  • Page 33 The system may fail during operation if the remaining battery level is low, so it is a good idea to check the remaining battery level and replace the batteries with new ones well before the batteries run out completely. U-51/52/54 Battery life: 70 hours (backlight off) U-53...

  • Page 34: Replacing The Coin Battery

    3 Basic Operation 3.1.2 Replacing the coin battery Coin battery to use: CR-2032  The coin battery is only for the clock. It will provide problem-free operation for three years,  but when using the clock continuously, it should be replaced every two years as a precaution.

  • Page 35: Attaching Sensors

    3 Basic Operation 3.1.3 Attaching sensors Note When attaching or replacing a sensor, wipe any moisture off the sensor probe and sensor.  Be sure to keep water out of sensor connectors. If moisture comes in contact with a sensor　 ...
  • Page 36 3 Basic Operation Attaching the ORP sensor  1. Remove the sensor guard. 2. Remove the sensor plug. 3. Coat the ORP sensor O-ring with a thin layer of grease (part No. 3014017718). Note Be sure no grease from the O-ring gets on the sensor connector. If the sensor connector gets grease on it, wipe it off with a soft cloth soaked in alcohol.
  • Page 37 3 Basic Operation Attaching the dissolved oxygen (DO) sensor  1. Remove the membrane cap mounted on the DO sensor beforehand, and replace it with the new membrane cap provided. Replace the internal solution with fresh solution. The main component of the internal solution is potassium chloride (KCl), so the old solution can be disposed of down a sink or other drain.

  • Page 38: Connecting The Control Unit And Sensor Probe

    3 Basic Operation 3.1.4 Connecting the control unit and sensor probe Note Connect the control unit with its power OFF. Red mark Zoom Hook 1. Align the red mark on the connector, and press the connector in until you hear it click.

  • Page 39: Gps (U-52G, U-53G, U-54G)

    3 Basic Operation Note Check that all sensors are attached. 3. Press the control unit's POWER key for about 1 second to turn the power ON. Leave the unit for at least 30 minutes to condition the sensors. Note The operation keys are designed to operate using the pad of a finger, sharp objects can tear the control unit cover damaging the operation keys.
  • Page 40 3 Basic Operation 5. The message "Execute GPS position measurement?" appears. Move the cursor to "YES", then press the ENTER key. 6. The message "Warming up. Please wait." appears. Wait until the system has finished warming up (about 10 seconds). Position measurement starts automatically when warmup has finished.
  • Page 41 3 Basic Operation GPS locating accuracy  1. Press the right () key to switch the display to the "SETTINGS" screen. 2. Press the down () key to move the cursor to "System", then press the ENTER key. 3. Press the down () key to move the cursor to "GPS locating accuracy", then press the ENTER key.

  • Page 42: Settings

    Setting measurement methods This section describes how to set the measurement method. Measurement methods  U-51/U-52/U-54 Pressing the MEAS key acquires the 5-second average for the selected Single measurement measurement parameter. Pressing the MEAS key acquires and saves the 5-second average for the Interval measurement selected measurement parameter in the set interval.
  • Page 43 Press the up () and down () keys to set the measurement interval. The measurement interval can be set to any value between 10 seconds and 24 hours in the case of the U-51, U-52 and U-54, or between 30 seconds and 24 hours in the case of the U-53.

  • Page 44: Setting Sites

    3 Basic Operation 3.2.2 Setting sites The site function allows position data to be connected to corresponding measurement data. Sites have the following specifications and features: Site names: Text data consisting of up to 20 one-byte alphanumeric characters, spaces, etc. Site names can be used for control unit searches and as labels for computer processing.
  • Page 45 3 Basic Operation 4. Press the down () key to move the cursor to "Select Site", then press the ENTER key to display the names of the currently saved sites. The black circle ( ● ) indicates the currently selected site. Creating a new site 1.
  • Page 46 3 Basic Operation 4. Press the down () key to move the cursor to "Create New Site", then press the ENTER key. Enter the desired site name (up to 20 alphanumeric non-Asian width characters). 5. Press the up (), down (), right (), and left () keys to move the cursor to each letter or number to use in the name, then press the ENTER key to confirm the entered characters.

  • Page 47: Unit For Report

    3 Basic Operation 4. Press the down () key to move the cursor to "Delete Site", then press the ENTER key. A list of the currently saved sites appears. The black circle ( ● ) indicates the currently selected site. 5.
  • Page 48 3 Basic Operation 3. Press the down () key to move the cursor to "Unit for report", then press the ENTER key. A list of the currently selected measurement parameters and their units appears. Note that measurement parameters not selected (in the measurement parameter selection screen) are not displayed.

  • Page 49: Sensor Selection

    3 Basic Operation 3.2.4 Sensor selection Note Measurement parameters can only be selected when the sensor probe is connected. You can set between 1 and 11 measurement parameters to display in the control unit screen. Follow the steps below to select the desired measurement parameters. 1.

  • Page 50: Compensation

    3 Basic Operation 3.2.5 Compensation Note Compensation settings can only be made when the sensor probe is connected. U-50 series have following functions of compensation. Salinity compensation and atmospheric pressure compensation for dissolved oxygen  (DO) Temperature compensation for conductivity (COND) ...
  • Page 51 3 Basic Operation 4. Press the down () key to move the cursor to "DO Salinity", then press the ENTER key to toggle the setting between "Auto" and "Input mode". Default: Auto 5. If you selected "Input mode", press the right () key to display the compensation value input screen.
  • Page 52 3 Basic Operation Atmospheric pressure compensation (DO)  Differences in the atmospheric pressure of the measurement location influence the Dissolved Oxygen (DO) measurement. By setting (input) the actual atmospheric pressure of the measurement location into the control unit, it is possible to standardize the measured Dissolved Oxygen (DO) value to a value at the standard atmospheric pressure (1013 hPa).
  • Page 53 3 Basic Operation 5. If you selected "Input mode", press the right () key to display the compensation value input screen. Press the up () and down () keys to enter the desired value, then press the ENTER key to set it. 6.
  • Page 54 3 Basic Operation Temperature compensation for conductivity (COND)  Sample conductivity (COND) varies with temperature, and this control unit uses a temperature compensation coefficient to automatically standardize the conductivity (COND) at 25C. The initial setting coefficient is 2%/K, which is the generally used. 1.
  • Page 55 3 Basic Operation 5. If you selected "Input mode", press the right () key to display the compensation value input screen. Press the up () and down () keys to enter the desired value, then press the ENTER key to set it. 6.

  • Page 56: Input Mode

    3 Basic Operation Setting a total dissolved solid (TDS) coefficient  The total dissolved solid amount (TDS) is a converted value obtained by multiplying the conductivity (COND) by a known coefficient. Three kinds of mode, “AUTO”, EN27888” and “Input mode”, can be selected. AUTO TDS is calculated according to the coefficient initially set.
  • Page 57 3 Basic Operation 3. Press the down () key to move the cursor to "Compensation", then press the ENTER key. 4. Press the down () key to move the cursor to "TDS", then press the ENTER key to switch the setting, "AUTO", "EN27888" and "Input mode". Default: Auto 5.

  • Page 58: System Settings

    3 Basic Operation 3.2.6 System settings The system settings let you change the display language, check the system software version, set the date/time, set the auto power OFF time, set the display contrast, and initialize the settings. Display language  Follow the steps below to select either English or Japanese as the display language.
  • Page 59 3 Basic Operation 5. A list of the supported display languages appears. Press the up () and down () keys to move the cursor to the desired language, then press the ENTER key. The black circle ( ● ) indicates the currently selected display language. ...
  • Page 60 3 Basic Operation 4. Press the down () key to move the cursor to "Version", then press the ENTER key. The program No. of the control unit and sensor probe software appears. Setting the date/time  Follow the steps below to set the date and time. 1.
  • Page 61 3 Basic Operation 7. When finished entering settings, press the ENTER key to move the cursor to SAVE, then press the ENTER key again to save the settings. Setting the auto power OFF time  Follow the steps below to set the time for the auto power OFF function (which turns the power OFF automatically when no operation is performed for the preset amount of time).
  • Page 62 3 Basic Operation 5. Press the up () and down () keys to select the desired time setting, then press the ENTER key. You can select OFF, or settings of 1, 2, 5, 10, 20, 30 or 60 minutes. Default: 30 minutes Display contrast ...
  • Page 63 3 Basic Operation 5. Press the left () and right () keys to adjust the contrast. Adjustment can be made in 26 steps. 6. Press the ENTER key. Initialization  Follow the steps below to restore all the settings except date/time to their factory defaults. Factory default calibration data for the electrical conductivity and turbidity sensors will also be deleted at the same time.
  • Page 64 3 Basic Operation 5. Press the ENTER key again. 6. A confirmation message appears asking whether to execute initialization. Press the left () key to move the cursor to YES, then press the ENTER key. The message "Initialize Complete" appears to indicate the process has finished.

  • Page 65: Calibration

    3 Basic Operation Calibration To obtain correct measurement values, the sensors need to be calibrated using standard solution before measurement. You can select simultaneous auto calibration of the pH, COND and TURB sensors in pH4 standard solution and DO and DEP sensors simultaneously in air, or manual calibration of individual measurement parameters.
  • Page 66 3 Basic Operation 2. Remove the transparent calibration cup. 3. Fill the transparent calibration cup to the line with pH 4 standard solution. The transparent calibration cup has With TURB Measurement and Without TURB Measurement gauge lines. Transparent calibration cup Without TURB Measurement gauge line With TURB Measurement gauge line 4.
  • Page 67 3 Basic Operation 6. Immerse the sensor probe in the transparent calibration cup. Check that the pH sensor, ORP sensor, reference electrode, COND sensor, TURB sensor and temperature sensor are submerged in the pH 4 standard solution and check that there are no air bubbles on the sensor. Sensor probe Transparent calibration cup 7.

  • Page 68: Manual Calibration

    3 Basic Operation 8. Wait for 3 minutes or more until all the sensor values have stabilized, and then press the ENTER key to start calibration. Note Do not remove the sensor probe from the calibration solution. U-53 turbidity data will display “----” until the calibration is completed.
  • Page 69 3 Basic Operation 4. In the parameter selection screen, move the cursor to “Temp”, then press the ENTER key. 5. Press the up () and down () keys to set the calibration value - the temperature of the water containing the submerged sensor probe. 6.
  • Page 70 7. Press the up () and down () keys to set the pH value of the pH 6.86 standard solution containing the submerged sensor probe at the measurement temperature Table 1 Indicated value of HORIBA pH standard solutions at various temperatures (pH) pH 6.86 standard...
  • Page 71 3 Basic Operation Table 2 Indicated value of other pH standard solutions at various temperatures (pH) pH 7 standard solution pH 10 standard solution Temp. (C) Neutral phosphate Carbonate 7.12 10.32 7.09 10.25 7.06 10.18 7.04 10.12 7.02 10.06 7.00 10.01 6.99 9.97...
  • Page 72 3 Basic Operation 14. Calibration is finished when the message "Cal complete. ENT to manual cal menu." appears. Press the ENTER key to return to the calibration parameter ORP calibration  Note If the prepared ORP standard solution is left in open air for one hour or more, the solution may be ...
  • Page 73 3 Basic Operation 6. Press the up () and down () keys to set the mV value of the ORP standard solution containing the submerged sensor probe at the measurement temperature. Table 3 Indicated value of ORP standard solution at various temperatures (mV) Temperature 160-22 16051...
  • Page 74 3 Basic Operation Conductivity (COND) calibration  Note To support a wide range of sample concentrations, electrical conductivity is divided into three  measurement ranges: 0.0 mS/m to 99.9 mS/m, 0.090 S/m to 0.999 S/m, and 0.9 S/m to 9.99 S/m. When manually calibrating conductivity, you can select two calibration points (one zero-point ...
  • Page 75 3 Basic Operation 8. In the parameter selection screen, move the cursor to “Cond”, then press the ENTER key. 9. Set the number of calibration points, then press the ENTER key. The instructions below assume that four calibration points have been set. 10.
  • Page 76 3 Basic Operation 15. Press the up () and down () keys to set the "Cond" value to 71.8 mS/m (0.718 mS/cm). Calibration range = 0 mS/m to 99.9 mS/m (0 mS/cm to 0.999 mS/cm) 16. Check that "Measurement value" has stabilized, then press the ENTER key to start calibration.
  • Page 77 3 Basic Operation 23. Wash the transparent calibration cup 2 or 3 times with deionized water, then fill it to the reference line with 5.87 S/m (58.7 mS/cm) standard solution. 24. Wash the sensor probe 2 or 3 times in deionized water to remove any dirt, then submerge the sensor probe in the transparent calibration cup.
  • Page 78 3 Basic Operation Turbidity (TURB) calibration  Note To support a wide range of sample concentrations, turbidity is divided into three measurement  ranges: 0.0 to 9.9 NTU, 10 to 100 NTU, and over 100 NTU. When manually calibrating turbidity, you can select two calibration procedures (one zero-point ...
  • Page 79 3 Basic Operation 3. In the parameter selection screen, move the cursor to "Turb", then press the ENTER key. 4. Press the up () and down () keys to set the number of calibration points, then press the ENTER key. The instructions below assume that four calibration points have been set.
  • Page 80 3 Basic Operation 9. When the message "Cal complete. Press ENT to Span cal." appears, press the ENTER key to start the first span calibration procedure. 10. Wash the transparent calibration cup 2 or 3 times with deionized water, then fill it to the reference line with 8 NTU standard solution, or a standard solution of known concentration between 0.1 and 10 NTU.
  • Page 81 3 Basic Operation 17. Press the up () and down () keys to set the "Turb" value to 80 NTU, or to the known concentration of the standard solution between 10 and 100 NTU. (Input range = 10.0 NTU to 99.9 NTU) 18.
  • Page 82 3 Basic Operation Dissolved oxygen (DO) calibration  Note You can select one calibration procedure (span calibration) or two calibration procedures (zero-  point calibration and span calibration). Carry out the two calibration procedures to ensure good measurement precision throughout all measurement ranges. It is necessary to prepare new solution before calibration of the Dissolved Oxygen (DO) sensor.
  • Page 83 3 Basic Operation 6. Wash the sensor probe 2 or 3 times in deionized water to remove any dirt, then submerge the sensor probe in the bottle. 7. Press the up () and down () keys to set the DO value to 0.00 mg/L or 0.0%. 8.
  • Page 84 3 Basic Operation Amounts of saturated dissolved oxygen in water at various temperatures (salinity=0.0%) JIS K0101 Temp. Temp. Temp. Temp. DO (mg/L) DO (mg/L) DO (mg/L) DO (mg/L) (C) (C) (C) (C) 14.16 13.77 10.67 8.68 7.42 13.40 10.43 8.53 7.32 13.04 10.20...
  • Page 85 3 Basic Operation Span setting values for calibration in air The software should display these values when auto calibration is performed. Use this table to input values for manual span calibrations in air. The DO measurement value of “air-saturated water” and air are different. Due to the pressure difference against the membrane in air versus the membrane in water, the measurement value in air is about 10% higher than the value of air-saturated water on average.
  • Page 86 3 Basic Operation Water depth (DEPTH) calibration  1. Calibrate the zero point. Wash the sensor probe 2 or 3 times in deionized water to remove any dirt, then remove all moisture from the sensor probe (it will be calibrated in air). 2.

  • Page 87: Measurement

     (single measurement) Having data stored in memory automatically and continuously  U-51/U-52/U-54: Interval measurement (minimum memory interval of 10 seconds) U-53: Interval measurement (minimum memory interval of 30 seconds) Select the measurement method that meets your requirements. Note Lower sensor probe slowly when submerging them in samples.
  • Page 88 3 Basic Operation 3. Submerge the sensor probe in the sample, gently shaking them in the sample to remove any air bubbles from the sensors. If the sample is non-flowing, move the cable slowly up and down (move the sensor probe at a rate of roughly 20 to 30 cm a second) to ensure that fresh sample is continuously supplied to the DO sensor.

  • Page 89: Automatic, Continuous Measurement

    ” (page 18)). 2. Press the up () and down () keys to set the interval value to the desired value (U-51/U-52/U-54: minimum interval: 10 seconds, U-53: minimum interval: 30 seconds), then press the ENTER key. The measurement screen appears automatically, and the system becomes ready for measurement.

  • Page 90: Data Operations

    3 Basic Operation Data operations Use the procedures below to retrieve data stored in memory, delete all the data, check the remaining data memory capacity, and check the calibration record. 3.5.1 Displaying data For maximum efficiency, there are 3 methods of displaying data. Displaying the data for a specified site ...
  • Page 91 3 Basic Operation 6. Move the cursor to "Search", then press the ENTER key. All site names that begin with the entered text are displayed. The most recently measured data for the entered site is displayed. 7. Press the up () and down () keys to display earlier data. Displaying the data for a specified date/time ...
  • Page 92 3 Basic Operation 5. With the cursor on the Date, press the ENTER key. 6. Press the up (), down (), left () and right () keys to enter the desired date/ time, then press the ENTER key to apply the setting. 7.
  • Page 93 3 Basic Operation 4. Move the cursor to "All", then press the ENTER key. The most recently measured data is displayed. 5. Press the up () and down () keys to display earlier data.

  • Page 94: Deleting Data

    3 Basic Operation 3.5.2 Deleting data Follow the steps below to delete all the data stored in memory. 1. Press the control unit’s POWER key for about 1 second to turn the power ON. The "MEASUREMENT" screen appears after about 10 seconds. Note The operation keys are designed to operate using the pad of a finger, sharp objects can tear the control unit cover damaging the operation keys.

  • Page 95: Checking The Data Memory

    3 Basic Operation 3.5.3 Checking the data memory You can check the used data capacity and the remaining data capacity. 1. Press the control unit’s POWER key for about 1 second to turn the power ON. The "MEASUREMENT" screen appears after about 10 seconds. Note The operation keys are designed to operate using the pad of a finger, sharp objects can tear the control unit cover damaging the operation keys.

  • Page 96: Checking The Calibration Record

    3 Basic Operation 3.5.4 Checking the calibration record Follow the steps below to check the latest calibration history. 1. Press the control unit’s POWER key for about 1 second to turn the power ON. The "MEASUREMENT" screen appears after about 10 seconds. Note The operation keys are designed to operate using the pad of a finger, sharp objects can tear the control unit cover damaging the operation keys.

  • Page 97: Gps Data Operations

    3 Basic Operation 3.5.5 GPS data operations The menu for GPS data operations appears on the display to which the GPS unit is mounted. GPS information  Follow the steps below to display acquired GPS information. Note Turning the power OFF erases the GPS information. 1.

  • Page 98: Sensor Information

    3 Basic Operation Sensor information 1. Press the control unit’s POWER key for about 1 second to turn the power ON. The "MEASUREMENT" screen appears after about 10 seconds. Note The operation keys are designed to operate using the pad of a finger, sharp objects can tear the control unit cover damaging the operation keys.

  • Page 99: Usb Communication

    3 Basic Operation USB communication The separately-sold, dedicated PC connection cable comes with data collection software. This software allows data to be downloaded from the control unit in CSV format. This section contains instructions for communication commands used for USB communication.

  • Page 100: Commands

    3 Basic Operation 3.7.2 Commands Contact your nearest sales outlet for the details about communication commands. Instant data requests  Request command format [CR] [LF] Header 1 character Command 2 characters Delimiter character 1 character Frame check sequence (FCS) 2 characters The two ASCII-code characters created by converting the 8 bits of data created by successively combining the value of each character from # through @ in an exclusive OR (XOR) operation with the value of the next character.
  • Page 101 3 Basic Operation XXXXX X XX XXXXX XXXXX X 58 59 60 61 62 66 67 XX XX XX XX XX XX XX XX XX X XXX XX XX X @ XX [CR] [LF] 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 Header 1 character...
  • Page 102 3 Basic Operation Parameter 6 data 5 characters including decimal point, 5 characters right-justified with blanks filled Parameter 6 unit (2) Unit code 1 character Parameter 7 code (1) Parameter code 2 characters Parameter 7 status (5) Parameter status code 1 character Parameter 7 error (6) Parameter error code...
  • Page 103 3 Basic Operation Month 01 to 12 2 characters 01 to 31 2 characters Hour 00 to 23 2 characters Minute 00 to 59 2 characters Second 00 to 59 2 characters Longitude (degrees) 00 to 90 or "--" (no GPS data) 2 characters Longitude (minutes) 00 to 59 or "--"...
  • Page 104 3 Basic Operation Response format (when data exists) RM AAAAAAAAAAAAAAAAAAAA XX X XXXXX X XX X XXXXX X XX X XXXXX XX X XXXXX X 10 11 13 14 15 16 17 18 19 20 21 22 XX X XXXXX X XX X XXXXX XX X...
  • Page 105 3 Basic Operation Parameter 4 error (6) Parameter error code 1 character Parameter 4 data 5 characters including decimal point, 5 characters right-justified with blanks filled Parameter 4 unit (2) Unit code 1 character Parameter 5 code (1) Parameter code 2 characters Parameter 5 selection 0: No selection;...
  • Page 106 3 Basic Operation Parameter 12 selection 0: No selection; 1: Selection made 1 character Parameter 12 error (6) Parameter error code 1 character Parameter 12 data 5 characters including decimal point, 5 characters right-justified with blanks filled Parameter 12 unit (2) Unit code 1 character Parameter 13 code...
  • Page 107 3 Basic Operation Memory data count request  Request command format [CR] [LF] Header 1 character Command 2 characters Delimiter character\ 1 character Frame check sequence (FCS) 2 characters Response format RN XXXXX [CR] [LF] Header 1 character Command 2 characters Total data count 0 to 10000 5 characters...

  • Page 108: Maintenance

    4 Maintenance Maintenance HORIBA Advanced Techno recommends regular manufacturer maintenance checks in order to ensure a long product life. Contact for maintenance Manufacturer: HORIBA Advanced Techno Co., Ltd. 31, Miyanonishi-cho, Kisshoin Minami-ku, Kyoto 601-8306, Japan Routine care After measurement ...
  • Page 109 4 Maintenance 7. Remove the sensor guard's guard cap, wash off any dirt with tap water, then put the guard cap back in place. Sensor probe Sensor guard Guard cap...

  • Page 110: Every 2 Months Maintenance

    4 Maintenance Every 2 months maintenance Dissolved oxygen (DO) sensor  Note The DO sensor's internal solution is potassium chloride (KCl). Although KCl is harmless,  protective equipment such as gloves and goggles should be worn when working with it. Internal solution can be disposed of down a sink.

  • Page 111: Storage

    4 Maintenance Storage Short-term (under 2 months) storage  Before storing the DO sensor, pour the third of the rubber cap (whit) provided with  deionized water and cover the DO sensor with them. Pour the third of the rubber cap (whit) with deionized water.

  • Page 112: Replacing The Turbidity Sensor

    4 Maintenance Replacing the turbidity sensor 1. Press the control unit’s POWER key for about 1 second to turn the power OFF. Note The operation keys are designed to operate using the pad of a finger, sharp objects can tear the control unit cover damaging the operation keys.

  • Page 113: Replacing The Membrane Cap

    4 Maintenance Replacing the membrane cap Replacement procedure  1. Prepare the DO sensor. Take a DO sensor out of pack (newly purchasing).  Remove a DO sensor from the sensor probe (after use).  Newly purchasing Undo a DO sensor from the sensor probe Twist a membrane cap from DO sensor.
  • Page 114 4 Maintenance 5. Attach a membrane cap to DO sensor Twist a DO sensor with holding a membrane cap tight. 6. Check for membrane surface Check air bubbles in a membrane cap. NG: Air bubbles of more than 5 mm in diameter Good: Limited air bubbles NG →...

  • Page 115: Troubleshooting

    4 Maintenance Troubleshooting Note If the sensor probe is removed while the control unit is indicating an error, errors cannot be canceled by using the ESC key. Either reconnect the sensor probe or restart the control unit. 4.7.1 Error displays Error Cause Solution...
  • Page 116 4 Maintenance Error Cause Solution pH sensor pH sensor 1. Replace the standard solution with new 1. The pH standard solution is contaminated. solution. 2. The pH-responsive membrane is dirty. 2. Clean the pH-responsive membrane. 3. The concentration of the reference 3.
  • Page 117 4 Maintenance Error Cause Solution pH sensor pH sensor 1. Replace the standard solution with new 1. The pH standard solution is contaminated. solution. 2. The pH-responsive membrane is dirty. 2. Clean the pH-responsive membrane. 3. The concentration of the reference 3.
  • Page 118 4 Maintenance Error Cause Solution Turbidity lamp power Turn the power OFF and replace the display's The remaining battery level is low. voltage error batteries with new ones. Display RTC error The time display is incorrect. Replace the coin battery. Contact your nearest sales outlet to have the Display FROM error Internal IC failure...
  • Page 119 4 Maintenance Error Cause Solution pH sensor pH sensor 1. Replace the standard solution with new 1. The pH standard solution is contaminated. solution. 2. The pH-responsive membrane is dirty. 2. Clean the pH-responsive membrane. 3. The concentration of the reference 3.

  • Page 120: Error Displays In Sensor Information

    4 Maintenance Error Cause Solution 1. Use a stirrer to agitate the sample during measurement. 1. The concentration of the sample is 2. Perform measurement away from direct unstable. sunlight. 2. External light disturbance has affected the 3. Turn the power OFF, wipe off any water Sample is unstable.

  • Page 121: Specifications

    5 Specifications Specifications Model Specification Basic value U-51 U-52 U-52G U-53 U-53G U-54 U-54G Measurement 10C to 55C temperature range Maximum sensor outer Approx. 96 mm diameter Sensor length Approx. 340 mm        2 m (standard)
  • Page 122 5 Specifications Model Specification Basic value U-51 U-52 U-52G U-53 U-53G U-54 U-54G Measurement Glass electrode method method Range pH 0 to 14 measurement        Two calibration Resolution 0.01 pH Precision ±0.1 pH Dissolved...
  • Page 123 5 Specifications Model Specification Basic value U-51 U-52 U-52G U-53 U-53G U-54 U-54G Measurement Platinum temperature sensor method 10C to 55C Range Temperature        measurement Resolution 0.01C Platinum temperature sensor, Sensor JIS Class B ( 0.3 + 0.005 |t|)
  • Page 124 5 Specifications The precision is defined by measuring the standard solution in the following cases. Turbidity and conductivity: after four point calibration  pH and DO: after two point calibration  Water depth and ORP: after one point calibration  Metallic parts are made of stainless steel.

  • Page 125: Reference

    6 Reference Reference Consumable parts Sensor  Name Model Description pH sensor #7112 3014057312 Standard type pH sensor pH sensor ToupH #7113 3200170923 Tough glass type pH sensor ORP sensor #7313 3200170920 DO sensor #7543 3200170924 Reference electrode #7210 3200043582 R bush unit 3200043587 Reference electrode liquid junction...

  • Page 126: Options Sold Separately

    6 Reference Others  Name Model Description Silicone grease for coating sensor O- Silicone grease 3014017718 － ring. Sponge brush unit 3200169531 Brush for cleaning sensor probe. － O-ring set for reference electrode 3200169376 O-rings for reference electrode. － O-ring set for DO sensor 3200169426 O-rings for DO sensor.

  • Page 127: Ph Measurement

    9 standard solution: 0.01 mol/L sodium tetraborate aqueous solution (Borate) Table 4 pH values of HORIBA pH standard solutions at various temperatures settings pH 6.86 standard Temp. pH 4 standard solution pH 9 standard solution...
  • Page 128 6 Reference Table 5 Indicated value of other pH standard solutions at various temperatures (pH) pH 7 standard solution pH 10 standard solution Temp. (C) Neutral phosphate Carbonate 7.12 10.32 7.09 10.25 7.06 10.18 7.04 10.12 7.02 10.06 7.00 10.01 6.99 9.97 6.98...

  • Page 129: Do Measurement

    6 Reference DO measurement 6.4.1 Principle of DO measurement Dissolved oxygen (DO) refers to the amount of oxygen that is contained in water. The concentration of dissolved oxygen is generally given as mg/L or as a percentage value (the dissolved oxygen saturation ratio). Dissolved oxygen is essential for maintaining the self-purifying ability of rivers and seas and also for fish to live.

  • Page 130: Salinity Calibration

    6 Reference 6.4.3 Salinity calibration When the solution and air come into contact and form an equilibrium (i.e. saturation), the relationship between the concentration of dissolved oxygen in the solution, C, [mol/L], and the partial pressure of oxygen in the air, Ps, [MPa/(mg/L)], can be represented by the following formula: 　C = Ps/H Where H [MPa/(mg/L)] is the Henry constant, a value that changes according to the...

  • Page 131: Atmospheric Pressure Compensation (Do)

    6 Reference 6.4.4 Atmospheric pressure compensation (DO) - Relation of altitude and air pressure General relation of altitude and air pressure is shown below. Table 6 Relation of altitude and air pressure (m) Altitude (m) Air pressure (Torr) Air pressure (bar) Air pressure (atm) Air pressure (hPa) 1.013...
  • Page 132 6 Reference Table 7 Relation of altitude and air pressure (ft) Altitude (ft) Air pressure (psia) Air pressure (inHg) Air pressure (hPa) 14.70 29.92 1013 14.64 29.81 1009 14.59 29.70 1006 14.53 29.60 1002 14.48 29.49 14.42 29.38 14.37 29.28 14.32 29.17 14.26...
  • Page 133 6 Reference Altitude (ft) Air pressure (psia) Air pressure (inHg) Air pressure (hPa) 4200 12.59 25.65 4300 12.54 25.55 4400 12.50 25.46 4500 12.45 25.36 4600 12.40 25.27 4700 12.36 25.17 4800 12.31 25.08 4900 12.27 24.98 5000 12.22 24.89 5100 12.17 24.80...

  • Page 134: Conductivity (Cond) Measurement

    6 Reference Conductivity (COND) measurement 6.5.1 Four-AC-electrode method Conductivity is an index of the flow of electrical current in a substance. Salts dissolved in water are separated into cations and anions. Such solution is called electrolytic solution. Electrolytic solution has the property of allowing the flow of current according to Ohm’s law. This property is referred to as ionic conductivity, since current flow is caused by ion movement in electrolytic solution.

  • Page 135: Si Units

    6 Reference Let us assume that the current, I(A), flows in a sample of conductivity L  under automatic control of the voltage-applying electrodes  so that the voltage at the voltage-detecting- electrodes, E(V), remains constant at all times. Then, the resistance of the sample, R(), across the voltage-detecting electrodes is represented as R=E/I.
  • Page 136 6 Reference Conductivity and temperature coefficient for various solutions  Conductivity and related temperature coefficients of representative substances (at 25°C) are shown in the table below. Temp. Conc. Cond. Temp.coef. Temp. Conc. Cond. Temp.coef. Substance Substance (ºC) (wt%) (S/m) (%/C) (ºC) (wt%) (S/m)

  • Page 137: Salinity (Sal) Conversion

    6 Reference Salinity (SAL) conversion The U-50 series is designed to calculate salinity as well as the other parameters. Note that the “salinity” here is the salinity of sea water. There is a constant relation between conductivity and salinity at certain temperatures. Therefore, if data on the conductivity and temperature are available, the corresponding salinity can be known.

  • Page 138: Turbidity (Turb) Measurement

    6 Reference Turbidity (TURB) measurement 6.9.1 Principle of turbidity measurement U-52 and U-53 sensors measure turbidity using the Transmitting and Scattering Method. U-52 sensors use a pulse light LED (infra-red emitting diode) as a light source, and detect scattered light from a 30 angle off center. U-53 sensors use a tungsten lamp as a light source and detect scattered light from a 90...

  • Page 139: Depth (Depth) Measurement

    6 Reference 6.10 Depth (DEPTH) measurement 6.10.1 Principle of depth measurement For the U-50 series, depth measurement can be made through use of a pressure gauge. The principle of the depth measurement uses the relation between depth and pressure. Although the measurement with the depth sensor is affected by atmospheric pressure, the depth sensor, however, makes zero-point adjustments through the automatic calibration before measurements.

  • Page 140: 6.11.2 Standard Electrode (Reference Electrode) Types And Orp

    But this kind of expression does invite confusion. The majority of the world, today, is consistent in its use of the signs as they are used in A, above. For this reason, HORIBA Advanced Techno, too, uses signs concerning ORP that are consistent with A, above.
  • Page 141 Headquarters 31, Miyanonishi-cho, Kisshoin Minami-ku, Kyoto 601-8306, Japan TEL:+81-75-321-7184 FAX:+81-75-321-7291...

This manual is also suitable for:

U-53U-52gU-52U-53gU-54U-54g

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