horiba NAVI F-51 Instruction Manual
  1. Manuals
  2. Brands
  3. horiba Manuals
  4. Measuring Instruments
  5. NAVI F-51
  6. Instruction manual

horiba NAVI F-51 Instruction Manual

Ph meter
Hide thumbs
Table of Contents

Advertisement

Quick Links

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the NAVI F-51 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for horiba NAVI F-51

Summary of Contents for horiba NAVI F-51

  • Page 2 Carefully read this manual before using the meter. ■ HORIBA's Warranty and Responsibility Your meter is covered by HORIBA's warranty for a period of one (1) year, under normal use. Although unlikely, if any trouble attributable to HORIBA should occur during this period, necessary exchange or repairs shall be conducted by HORIBA, free of charge.
  • Page 3 Precautions for use ■ CE Marking This product is in conformity with the following directives and standards: Directives:The EMC Directives 89/336/EEC The Electrical Product Safety Directive 73/23/EEC Standards: EN61326: 1997+A1:1998 (EMISSION: Class B, IMMUNITY Category: Minimum Requirement) EN61010-1: 2001 Installation Environment This product is designed for the following environment.
  • Page 4 Precautions for use ■ Type and Definition of Signal Words For the safety use, the meter is equipped with the Warning Labels to alert every operator and user to the possible risk and danger. Before using understanding each message. The meaning of signal words are as follows: This indicates an potentially hazardous situation which, (WARNING) if not avoided, will result in death or serious injury.
  • Page 5 Precautions for use ● Indication WARNING This indicates an potentially hazardous situation which, if not avoided, will result in death or serious injury. CAUTION This indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert unsafe practices.
  • Page 6 Precautions for use ■ Cautionary Items ● Precautions Do not give physical shock to the meter like dropping or hitting. ● Avoid water or solution from being contact with the meter body. ● Water or solution, if contacts with the meter, may cause the meter breakage.

  • Page 7: Table Of Contents

    TABLE OF CONTENTS Chapter 1 Overview of pH Meter ..Package contents ............1 Functions ............... 2 Explanation of part names..........4 1.3.1 Meter body ..................4 1.3.2 Display ................... 4 Operation keys............... 6 Assembling the electrode stand ........
  • Page 8 Operation flowcharts ............ Pin layout of special cables ......... 7.6.1 RS-232C communications cable ........... 7.6.2 Cable for CITIZEN printer ............. 7.6.3 Cable for SEIKO printer ..............Spare and optional parts ..........7.7.1 Spare parts list ................7.7.2 Optional parts ................HORIBA...

  • Page 9: Chapter 1 Overview Of Ph Meter

    Overview of pH Meter This chapter explains the part names, how to connect the electrodes, how to replace the batteries, and precautions when using the meter. Package contents The following items are shipped with each HORIBA pH meter. Name Q’ty Meter...

  • Page 10: Functions

    30 minutes. RS-232C Enables communication with a computer, page communications using RS-232C. Printer output Prints the contents of the memory (printer page sold separately). Commercial Enables the use of commercial power, page power supply using an AC adapter (sold separately). HORIBA...
  • Page 11 Chapter 1 Overview of pH Meter 1.2 Functions ● Setting Items Page Function Explanation pH standard Enables standard solution used for page solution setting calibration to be changed to NIST and US specifications settings. pH temperature Enables temperature compensation to be page compensation conducted in pH Measurement mode,...

  • Page 12: Explanation Of Part Names

    選択カーソル Measurement unit 測定単位 Setting mode guide 設定モードガイド ● Part name Display Contents Input channel Input channel 1 Measurement Displayed when measuring mV item Displayed when measuring pH Displayed in mV Measurement mode, when relative mV is being set HORIBA...
  • Page 13 Chapter 1 Overview of pH Meter 1.3 Explanation of part names Part name Display Contents Error No. Displayed when an error is generated Data No. Displayed when data number has been set. Status display Shows error number and data number. Displayed when the serial communication is active.

  • Page 14: Operation Keys

    The automatic power-off function is a default setting for this pH meter. The power is automatically turned OFF if no operation is performed after a period of approximately 30 minutes. HORIBA...

  • Page 15: Assembling The Electrode Stand

    Chapter 1 Overview of pH Meter 1.5 Assembling the electrode stand Assembling the electrode stand Mount the electrode stand on the rear of the meter as shown in the figure below. F-51...

  • Page 16: Connecting The Electrodes

    CH1 measurement electrode Push the electrode connector into the connector port while turning it clockwise, following the grooves. Push the connector cover over the connector, being careful to push it straight on without turning it. Connector cover HORIBA...
  • Page 17 Chapter 1 Overview of pH Meter 1.6 Connecting the electrodes ● Temperature connector Insert the temperature connector into the jack on the main unit of the pH meter. When the temperature electrode is not connected (or is connected improperly), the automatic temperature compensation (ATC) will be 25°C . F-51...

  • Page 18: Inserting/Replacing The Dry-Cell Batteries

    (4 pcs.) in the correct direction. Battery cover 電池カバー − ＋ ＋ Dry-cell 単 3 乾電池 battery （4 本） − Battery life The life of alkaline batteries during continuous use is approx. 500 hours. The life of manganese batteries is approx. 250 hours. HORIBA...

  • Page 19: Connecting The Ac Adapter

    Chapter 1 Overview of pH Meter 1.8 Connecting the AC adapter Connecting the AC adapter When using the meter with an AC power supply, use the designated AC adapter (option) AC adapter specifications Supply voltage range 100 - 200 V AC Frequency range 50/60 Hz Current rating...
  • Page 20 Chapter 1 Overview of pH Meter 1.8 Connecting the AC adapter HORIBA...

  • Page 21: Chapter 2 Taking Measurements

    Chapter 2 Taking Measurements 2.1 Turning the meter ON/OFF Chapter 2 Taking Measurements This chapter explains how to take basic measurements. Turning the meter ON/OFF Pressing the ON/OFF key turns the power on/off. The ON/OFF key functions when it is pressed continuously for about one second to protect against accidental operation.

  • Page 22: Measurement Modes

    "stabilized" value (when "HOLD" is blinking), press the MEAS key. Blinks Displayed Criteria for judging stability pH, ORP measurement ： Within ±1mV variance in potential after 10 seconds Temperature measurement ： Within ±2ºC variance after 10 seconds HORIBA...

  • Page 23: Selecting The Measurement Modes

    Chapter 2 Taking Measurements 2.4 Selecting the measurement modes Selecting the measurement modes Pressing the MODE key changes the measurement mode. The last measurement mode item is the clock display. Pressing the MODE key once more returns the display to the first measurement mode. Power ON pH Measurement (CH1) mode (instantaneous value) mV Measurement (CH1) mode (instantaneous value)

  • Page 24: Measuring Ph

    “ ● pH repeatability check” page 22 “ ● pH calibration history” page 31 5. pH Measurement mode (instantaneous value) 3.4.3 Temperature compensation setting page 38 3.4.5 Sample ID# setting page 39 Clear HOLD 6. Auto Hold Measurement 3.1 Data memory function page 29 HORIBA...
  • Page 25 Chapter 2 Taking Measurements 2.5 Measuring pH ● Electrode preparation Refer to the electrode instruction manual and make sure you have the necessary electrode(s). Plastic-body pH electrode: 9621-10D Glass-body pH electrode: 9611-10D pH (micro) electrode: 9669-10D pH (sleeve) electrode: 9677-10D Chemical solution The liquid inside the electrode is highly concentrated potassium chloride (3.33 mol/L KCl).
  • Page 26 The mode cannot be changed during Auto Hold calibration (while “HOLD” is blinking or continually displayed). Wash the tip of the electrode well with pure (de-ionized) water, and then wipe with filter paper or tissue paper. HORIBA...
  • Page 27 Chapter 2 Taking Measurements 2.5 Measuring pH Open the internal solution filler port. Leave the port open while calibration is taking place. Open Close Calibration at first point Immerse the tip of the electrode in a beaker containing pH 7 standard solution.
  • Page 28 The example of calibration at second point has explained the calibration process using the order from pH 7 to pH 4. However, the calibration order of the standard solutions can be arbitrarily chosen. HORIBA...
  • Page 29 Chapter 2 Taking Measurements 2.5 Measuring pH Electrode status You can check the status of the electrode after calibration Item Description The electrode is in good condition. Electrode sensitivity is from 93% to 100%. ,ERR Not displayed Electrode sensitivity has dropped to the level of 90% to 93%.
  • Page 30 There is no problem in measurement accuracy if the difference is within ± 0.05 ● Clearing calibrated values To clear all the calibrated values: Set the pH meter to the Calibration mode. Press the CAL key while holding the SET key down. HORIBA...
  • Page 31 Chapter 2 Taking Measurements 2.5 Measuring pH ● Measuring pH Wash the tip of electrode well with pure (de-ionized) water, and then wipe with filter paper or tissue paper. Open the internal solution filler port. Leave the port open while measurement is taking place. Open Close Immerse the electrode all the way in the sample.
  • Page 32 When measurement data is held using Instantaneous Value Measurement or Auto Hold Measurement, you can store that data in the memory by pressing the ▲ key. See 3.1 Data memory function page 29 HORIBA...

  • Page 33: Measuring Orp

    Chapter 2 Taking Measurements 2.6 Measuring ORP Measuring ORP The following shows the operational flow for ORP measurement. ● ORP measurement operational flow 1. Electrode preparation Power ON pH Measurement mode (instantaneous value) 2. mV Measurement mode (instantaneous value) “ ● Setting the clock” page 33 3.
  • Page 34 Refer to the “ Criteria for judging stability” page 14 for the criteria for judging the stability of the readout. If the data is to be saved to the memory, press the ▲ key. See 3.1 Data memory function page 29. HORIBA...
  • Page 35 Chapter 2 Taking Measurements 2.6 Measuring ORP ● Measuring relative mV This pH meter can measure relative potential difference by shifting the measured potential to zero. (A potential without compensation is called absolute mV.) Press the CAL key in the mV Instantaneous Value Measurement mode.
  • Page 36 Chapter 2 Taking Measurements 2.6 Measuring ORP HORIBA...

  • Page 37: Chapter 3 Functions

    Chapter 3 Functions 3.1 Data memory function Chapter 3 Functions This chapter describes the various functions of the pH meter. Data memory function The measured data can be stored manually. ● Data memory In all measurement modes, you can store data when the instantaneous value is measured or the measured value is held (HOLD status) during the Auto HOLD measurement by pressing the ▲...
  • Page 38 Select the desired data item using the ▲ and ▼ keys. If an error occurs while a data number is being displayed, the error number will NOT be displayed. When using a printer (sold separately), press the ENTER key while in the DATA OUT mode to print the data. HORIBA...

  • Page 39: Calibration History Display

    Chapter 3 Functions 3.2 Calibration history display Calibration history display The latest calibration and repeatability check information can be checked. Refer to " ● pH repeatability check" page 22 . ● pH calibration history Press the CAL DATA key in the pH Measurement mode. The latest calibration date is displayed.
  • Page 40 When the electrode is old and is going bad Refer to " ● ERR 04 Asymmetric potential error" page 80 . pH latest check data Press the ▼ key with latest check date displayed. The repeatability display will appear. Repeatability display HORIBA...

  • Page 41: Displaying And Setting The Clock

    Chapter 3 Functions 3.3 Displaying and setting the clock Displaying and setting the clock The clock needs to be when the meter is used for the first time or after replacing the batteries. ● Displaying the clock Press the MODE key in the Measurement mode to display the clock. ●...

  • Page 42: Setting Modes

    Temperature Selects the Auto/Manual mode page 38 Compensation for temperature compensation. Calibration Sets the number of days between page 39 Frequency pH electrode calibrations. Setting Sample ID Stores the memory with putting page 39 ID to the measured sample. HORIBA...

  • Page 43: Ph Standard Solution Setting

    Chapter 3 Functions 3.4 Setting modes Display Name Description Page No. Maintenance Sets various maintenance-related page 40 settings. 3.4.2 pH standard solution setting The meter allows you to select the standard solution specifications used for calibration from among the NIST standard, US standard (USA), and user-defined standard (CUST).
  • Page 44 Press the SET key in the Measurement mode and select the pH Buffer Setting mode. Press the ENTER key to toggle between Japanese standard (NIST), US standard (USA) and a user-defined standard (CUST). Press the MEAS key to return to the Measurement mode. HORIBA...
  • Page 45 Chapter 3 Functions 3.4 Setting modes Calibration using a user-defined standard (CUST) Press the CAL key in the pH Measurement mode to select the Calibration mode. “>CAL<“ will be displayed. Set the pH value of the standard solution used for calibration using the ▲...

  • Page 46: Temperature Compensation Setting

    (When notemperature sensor is connected, the display shows 25 Manual temperature compensation (when an electrode temperature sensor is not being used and the temperature of the solution isknown beforehand) MTC is displayed. Set the temperature using the ▲ and ▼ keys. ° Setting range: 0.0 to 100.0 HORIBA...

  • Page 47: Ph Calibration Frequency Setting

    Chapter 3 Functions 3.4 Setting modes 3.4.4 pH calibration frequency setting If you set a number of days in the calibration frequency setting, ERR 8 (calibration frequency error) will be displayed after the specified days have passed since the last calibration. Press the SET key in the Measurement mode to select the Calibration Interval Setting mode.

  • Page 48: Maintenance Mode

    Data Clears all data in the data memory. page memory clear Initialization Initializes all settings to default page of setting values. Printer con- Carries out a printing test. page nection and printing test HORIBA...
  • Page 49 Chapter 3 Functions 3.4 Setting modes ● LCD check [item No. 00] Displays all segments of the LCD. Press the MODE key in the Maintenance mode to show item No. Press the ENTER key. Compare the LCD screen with this diagram to confirm that all segments of the LCD are displayed.
  • Page 50 The voltage shown in this mode will be a little lower than the actual voltage. Use the MODE key to proceed to temperature zero adjustment (item No. 02). HINT! Entering the Maintenance mode   Measure- Item No. Maintenance mode ment mode selection HORIBA...
  • Page 51 Chapter 3 Functions 3.4 Setting modes ● Temperature zero adjustment [item No. 02] This mode uses a known temperature to calibrate the temperature compensation value. Immerse the electrode in a liquid with a known temperature, and set the temperature using the ▲ and ▼ keys. Setting range: 0.0 to 100.0 °C Item No.
  • Page 52 ▲ and ▼ keys. Setting range: 1 to 30 minutes Item No.03 Press the MODE key to proceed to [Item No. 05] Remaining data memory. HINT! Entering the Maintenance mode   Measure- Item No. Maintenance mode ment mode selection HORIBA...
  • Page 53 Chapter 3 Functions 3.4 Setting modes ● Remaining data memory [Item No. 05] Displays the number of data items that can still be stored. Number of remaining data memory items Item No. 05 Press the MODE key to proceed to Data memory clear (item No. 06).
  • Page 54 Use the MODE key to proceed to Printer connection and printing test (item No. 08). The setting values to be initialized are shown on page 100.   HINT! Entering the Maintenance mode   Measure- Item No. Maintenance mode ment mode selection HORIBA...
  • Page 55 Chapter 3 Functions 3.4 Setting modes ● Printer connection and printing test [item No. 08] A printing test is conducted if a printer is connected. Press the ENTER key to start the printing test. When conditions are normal, “End” is displayed. When conditions are not normal, “Err”...
  • Page 56 Chapter 3 Functions 3.4 Setting modes HORIBA...

  • Page 57: Chapter 4 Rs-232C Communications

    Chapter 4 RS-232C communications 4.1 Cautions before use Chapter 4 RS-232C communications This chapter describes the use of RS-232C communications and its communication commands. Cautions before use Use caution regarding the following points, when using RS-232C communications. ・ Use the following designated cable for connecting to the computer. Part name: PC cable for 50 Series Part number: 9096004800 ・...

  • Page 58: Command List

    ER,n<CR><LF> n= 0: Communication error 1: When a non-existent command is input. 2: When a timing command is input to which the meter cannot respond. 3: When the numerical value in the command is out of the setting range. HORIBA...
  • Page 59 Chapter 4 RS-232C communications 4.2 Command list ● On-line operations commands Command Command item Page No. Command Header code On-line/off-line page 52 Halt potential hunting page 53 pH Measurement page 52 mode designation mV Measurement page 52 mode designation command Start measurement page 53 Start pH standard...

  • Page 60: On-Line Operation Commands

    ● mV Measurement mode designation command format Channel number (1) Command code (mV Measurement mode designation) Header ・ This command is always valid when on-line. ・ The meter changes the status to mV Instantaneous display for the selected channel number. HORIBA...
  • Page 61 Chapter 4 RS-232C communications 4.3 On-line operation commands ● Start measurement command format Channel number (1) Command code (Start measurement) Header ・ When the meter status is Instantaneous Value Measurement, Auto Hold Measurement will start. ・ If the command is issued during a measurement hold or during calibration, the meter will return to Instantaneous Value Measurement status.
  • Page 62 ● Data clear command format Command code (Data clear) Header This command clears the data retained in the memory. ● Data IN designation command format Command code (Data IN designation) Header ● Power Off command format Command code (Power Off) Header HORIBA...

  • Page 63: Data Request Commands And Responses

    Chapter 4 RS-232C communications 4.4 Data request commands and responses Data request commands and responses This section explains the commands that request meter data. ● Format of responses from meter When no operation can be received ER, n [CR][LF] n = 0: Communications error 1: Command code does not exist 2: Unacceptable timing entered 3: Data exceeds range...
  • Page 64 (5-digit value including decimal point and sign) Calibration solution value (6-digit value including decimal point and sign) Seconds, 2-digit, 00 - 59 Minutes, 2-digit, 00 - 59 Hours, 2-digit, 00 -23 Day, 2-digit, 01 - 31 Month, 2-digit, 01 - 12 Year, 4-digit (A.D.) HORIBA...
  • Page 65 Chapter 4 RS-232C communications 4.4 Data request commands and responses ・ The format is of fixed length. When there is no data, enter a [SP]. ・ The calibration data is transmitted only for the number of calibration points used. ・ The date and time when the latest calibration was performed is output as the calibration date/time.
  • Page 66 Command code Header Meter response format Seconds, 2-digit, 0 - 59 Minutes, 2-digit, 0 - 59 Hours, 2-digit, 0 - 23 Day, 2-digit, 01 - 31 Month, 2-digit, 01 - 12 Year, 4-digit (A.D.; lead zero is suppressed) Header HORIBA...
  • Page 67 Chapter 4 RS-232C communications 4.4 Data request commands and responses ● Measurement request command and response Request command format Command code Header Meter response format Measurement value, 6-digit Seconds, 2-digit, 0 - 59 Minutes, 2-digit, 0 - 59 Hours, 2-digit, 0 - 23 Day, 2-digit, 01 - 31 Month, 2-digit, 01 - 12 Year, 4-digit (A.D.;...
  • Page 68 (Lead zero is suppressed.) Temperature (5-digit including decimal point), -10.0 to 100.0 Right -aligned and the blank digits are filled with spaces. Temperature setting, 1-digit, 0:ATC; 1: MTC Unit, 1-digit (pH) 0: None (mV) 0: mV Supplementary unit, 1-digit 0: none HORIBA...
  • Page 69 Chapter 4 RS-232C communications 4.4 Data request commands and responses ● Request command for number of stored data items and its response Request command format Command data Header Meter response format Number of data items Header F-51...
  • Page 70 Day, 2-digit, 01 - 31 Month, 2-digit, 01 - 12 Year, 4-digit (A.D; lead zero is suppressed) Ion slope, 1-digit, [SP] Measurement status, 1-digit 0: Instantaneous value Measurement/calibration type, 1-digit 0: Measurement Channel number, 1-digit, 1: 1CH Measurement mode, 1-digit 0: pH; 1:mV HORIBA...
  • Page 71 Chapter 4 RS-232C communications 4.4 Data request commands and responses Error code Error No. display, 2-digit (One error No. which takes precedence over others is output.) When the measurement/calibration type is 0: The latest data is output regardness of occurrence of measurement errors.
  • Page 72 Meter response format Lot No. (7-digit) Model Model 6: F-51 2: D52 3: D53 4: D54 5: D55 Header ● Request command for software version and its response Request command format Command code Header Meter response format Software version, 12-digit Header HORIBA...

  • Page 73: Communication Example Using The Hyperterminal

    Chapter 4 RS-232C communications 4.5 Communication example using the HyperTerminal Communication example using the HyperTerminal For reference, communication using the HyperTerminal that comes with Windows is described here. Open the HyperTerminal. [Start] > [Programs] > [Accessories] > [Communications] > [HyperTerminal] The HyperTerminal program (Hypertrm.exe) is activated.
  • Page 74 If a command is input, the corresponding response data is sent back. Command input should be completed within 10 seconds. Be sure to first set the meter to the On-line mode using the On- line/Off-line command. ® Windows is a registered trademark of Microsoft Corporation. HORIBA...

  • Page 75: Chapter 5 Printer

    Chapter 5 Printer 5.1 Connecting the printer Chapter 5 Printer This chapter explains the printer connection, the times printing takes place, and printing formats. Connecting the printer The following printers are compatible with the pH meter. Printers ・ Citizen CBM-910-24RJ100-A (Normal paper) ・...

  • Page 76: Printer Setting

    Prepare printer paper and turn ON the power switch with the FEED and CHARGE switches held down. Set the baud rate of the printer to the above value, referring to the instruction manual for the printer. Start the function setting mode of the printer and change it to the above settings. HORIBA...

  • Page 77: Printer Output Timing

    Chapter 5 Printer 5.3 Printer output timing Printer output timing The printer prints at the following times: ・ When pressing the ENTER key after HOLD or while the instantaneous value is being displayed in the Measurement mode. ・ When the manual data memory storage is performed in the Measurement mode.

  • Page 78: Printing Format

    ③ Temperature compensation setting Manual mode: MTC Auto mode: ATC ● mV Measurement mode ① REL is displayed during relative mV mea- ③ ① surement. ② ID#: 5 digits ② ③ Temperature compensation setting Manual mode: MTC Auto mode: ATC HORIBA...

  • Page 79: When The Manual Data Memory Is Performed In The Measurement Mode

    Chapter 5 Printer 5.4 Printing format 5.4.2 When the manual data memory is performed in the Measurement mode The printer prints the data memory No. in the first line and the data in accordance with the format same with the one in "5.4.1 When the ENTER key is pressed in the Measurement mode"...

  • Page 80: When The Enter Key Is Pressed In The Calibration History Display

    4.01 146mV No calibration/1-point calibration: ATC 25.0°C None 2-point calibration: 1st item 3-point calibration: 2nd item ● pH calibration history (with check data) Value of repeatability check Calibration data 5.4.6 Test printing format in the Maintenance mode HORIBA...

  • Page 81: Maintenance And Troubleshooting

    Chapter 6 Maintenance and Troubleshooting 6.1 pH (ORP) electrode maintenance Chapter 6 Maintenance and Troubleshooting This chapter explains how to perform daily meter maintenance and how to deal with error messages. Daily maintenance is vital in assuring accurate measurement and preventing breakdowns before they occur.
  • Page 82 If the internal solution comes in contact with your eyes, flush immediately with large amounts of water and seek treatment by a physician. Open the internal solution filler port and use a syringe to remove the internal solution. HORIBA...
  • Page 83 Chapter 6 Maintenance and Troubleshooting 6.1 pH (ORP) electrode maintenance Fill the electrode with new reference solution (#300), until it nears the opening. Wash the tip of the electrode well with pure (de-ionized) water and wipe it with filter paper or tissue paper. If the liquid on the inside of the electrode cap has dried, wash the inside of the electrode cap with pure (de-ionized) water, and then, after shaking out the water, fill the cap with enough pure water to...
  • Page 84 Rinse using a hydrochloric acid solution or cleaning liquid #220 of approximately 1 mol/L. Be sure not to soak the electrode in strong acid for a long period of time. 1 mol/L hydrochloric acid solution is made by diluting commercially available concentrated hydrochloric acid by a factor of ten. HORIBA...

  • Page 85: Troubleshooting

    Chapter 6 Maintenance and Troubleshooting 6.2 Troubleshooting Troubleshooting The meter is equipped with a simply error-message function to notify the operator that an operation error or problem with the equipment has occurred. Errors or other problems that occur while in the Measurement mode are announced by an error No.
  • Page 86 ON/OFF key for about 10 seconds. the power is turned The internal IC is Seek repairs at your nearest retail outlet or defective. HORIBA service station. ● ERR No. 02 Battery voltage low Explanation The battery has insufficient voltage. Cause...
  • Page 87 Chapter 6 Maintenance and Troubleshooting 6.2 Troubleshooting ● ERR 03 Electrode stability error Explanation The electric potential did not stabilize within three minutes. Cause How to solve problem This is caused by the Press the MEAS key again while “HOLD” is sample solution (when either blinking or steadily lit in the display, to the sample solution is...
  • Page 88 Use fresh standard solution. with the standard solution. The electrode is not Connect the electrode correctly. connected correctly. Electrode is not Immerse the electrode in the sample at least submerged deeply three centimeters deep. enough to cover reference junction. HORIBA...
  • Page 89 Chapter 6 Maintenance and Troubleshooting 6.2 Troubleshooting ● ERR 06 Max. calibration points exceeded Explanation Calibration was performed on a fourth calibration point. Cause How to solve problem Calibration was Limit the number of calibration points to three. performed on a fourth This error message is cleaned by setting the calibration point.
  • Page 90 Replace the printer. defective. ● ERR 10 Data memory over Explanation The number of data items has exceeded the limit of the memory. Cause How to solve problem Memory ove Delete data stored in the memory after confirming their contents. HORIBA...

  • Page 91: More Troubleshooting

    Chapter 6 Maintenance and Troubleshooting 6.2 Troubleshooting 6.2.2 More troubleshooting This section explains how to respond to various symptoms of trouble that are not indicated by an error number. ● Nothing shows up on the display when the power is turned ON Cause How to solve problem No batteries...
  • Page 92 The liquid junction is Immerse the electrode in the sample solution not immersed in the up until the liquid junction or deeper. sample solution. Some effects of the Determine if this is the cause by measuring sample. with a stable standard solution. HORIBA...
  • Page 93 Turn the power OFF, and then turn it back ON locked. again. The electrode Attach the electrode connector correctly. connector is not attached correctly. The electrode is Replace the electrode. defective. (the responsive membrane is cracked.) The meter is Contact your local HORIBA distributor. defective. F-51...
  • Page 94 Check this point As shown in the diagram, use a jumper wire or bent paper clip to short the meter by touching both the center pin in the electrode connector and some metal part. HORIBA...
  • Page 95 Chapter 6 Maintenance and Troubleshooting 6.2 Troubleshooting ● The temperature display is blinking. The temperature display does not change from 25ºC. The temperature measurement exceeds the measurement range. Measurement range: -10 – 100.0ºC Cause How to solve problem The temperature of Check the temperature of the sample solution the sample solution and change to a sample solution that has a...
  • Page 96 Check the following points: ・ Is the printer turned ON? ・ Has a printer error occurred? ・ Is there printing paper? Has the paper jammed? ・ When running a test print according to the manual, does it print out correctly? HORIBA...

  • Page 97: Chapter 7 Reference

    Chapter 7 Reference 7.1 pH measurement Chapter 7 Reference This chapter provides a simple compilation of information for those who would like to know about the functions of the main unit of the pH meter and other measurement principles in greater detail. It also serves as a reference for spare and optional parts.
  • Page 98 ・ pH 6.86 standard solution: Neutral phosphate 0.025 mol/L potassium dihydrogen phosphate, 0.025 mol/L sodium dihydrogenphosphate aqueous solution ・ pH 9.18 standard solution: Borate 0.01 mol/L tetra-sodium boric acid (boric sand) aqueous solution ・ pH 12.45 standard solution: Saturated calcium hydroxide solution HORIBA...
  • Page 99 Chapter 7 Reference 7.1 pH measurement pH values of pH standard solutions at various temperatures (NIST(former NBS) settings) pH 12.45 standard pH 1.68 pH 4.00 pH 6.86 standard pH 9.18 solution standard standard solution standard Temp. Saturated solution solution solution (°C) Neutral calcium...
  • Page 100 10 standard solution Temp. solution (°C) Neutral Carbonate phosphate 7.119 10.318 7.086 10.245 7.058 10.178 7.035 10.117 7.015 10.061 7.000 10.011 6.988 9.965 6.979 9.925 6.973 9.888 6.969 9.856 Calibration is performed using Nernst's equation with the above values. HORIBA...
  • Page 101 Chapter 7 Reference 7.1 pH measurement ● Using standard solutions Standard solutions are used to calibrate the scale of the pH meter employed to measure the unknown pH of a solution. Standard solutions of pH 4, 7, and 9 are used in combination according to the particular conditions of the solution that is to be inspected.

  • Page 102: Mv (Oxidation-Reduction Potential [Orp]) Measurement

    ) and the reductant (Fe )) (using the equation aFe ). In actuality, however, many kinds of states of equilibrium exist simultaneously between various kinds of ions, in most solutions. This means that under actual conditions, ORP cannot be expressed using HORIBA...
  • Page 103 Chapter 7 Reference 7.2 mV (oxidation-reduction potential [ORP]) measurement the simple equation shown above and that the physical and chemical significance with respect to the solution is not very clear. In this respect, the value of ORP must be understood to be only one indicator of the property of a solution.
  • Page 104 But this kind of expression does invite confusion. The majority of the world is consistent in its use of the signs as they are used in A, above. For this reason, HORIBA also uses signs concerning ORP that are consistent with A.
  • Page 105 Chapter 7 Reference 7.2 mV (oxidation-reduction potential [ORP]) measurement ● ORP standard solution There are two kinds of standards substances. Under normal circumstances, it is sufficient to use only that type of substance which is closest to the measured value. Indicated value of ORP standard solution at various temperatures (mV) 160 - 22...
  • Page 106 (such as tap water, well water, or water treated with purifying equipment), there may be less responsiveness, repeatability, and stability, in general. ・ When alkaline water is allowed to stand, its ORP undergoes con- siderable changes. Always measure alkaline ion water promptly. HORIBA...

  • Page 107: Specifications

    Chapter 7 Reference 7.3 Specifications Specifications ● Measurement target Target Item Description Measurement Glass electrode principle Display range pH -2.00 – 16.00 Measurement pH 0.00 – 14.00 range Resolution 0.01 pH Repeatability ±0.01 pH ±1digit Measurement Thermistor principle Measurement 0.0 – 100.0 ºC Temp.

  • Page 108: Default Settings

    Category Item Default values Common settings Temperature compensation Automatic temperature compensation Manual temperature 25 ºC compensation Automatic power OFF Approx. 30 min (ON) Sample ID 00000 Calibration cycle Standard calibration solution NIST Calibration setting Asymmetric potential: 0mV Sensitivity: 100% HORIBA...

  • Page 109: Operation Flowcharts

    Chapter 7 Reference 7.5 Operation flowcharts Operation flowcharts The following flowcharts summarize meter operations. ● F-51operation flow *1) pH Measurement mode *3) Calibration mode (instantaneous (instantaneous value) value) *2) Auto Hold Measurement Auto Hold calibration Clear Hold Automatic release of Hold *4 mV Measurement mode *6) Relative mV Measurement mode (instantaneous value)

  • Page 110: Pin Layout Of Special Cables

    D-SUB 25-PIN 2;CTS − 20;BUSY 3;TXD − 3;RXD 4;GND − 7;GND 5;RXD − 2;TXD 7.6.3 Cable for SEIKO printer DPU-H245AS-A03A Meter main unit Printer MINI DIN8M D-SUB 25-PIN 2;CTS − 8;BUSY 3;TXD − 3;DATA 4;GND − 5;GND 5;RXD − 2;OPEN HORIBA...

  • Page 111: Spare And Optional Parts

    7.7 Spare and optional parts Spare and optional parts This section lists spare and optional parts for the pH meter. These parts are available through HORIBA distributors. Place an order specifying their name, model, and part number. 7.7.1 Spare parts list ●...
  • Page 112 For Ag/AgCl electrode at 20ºC ● Internal reference solution Part name Model Part number Remarks Internal reference #300 9003003200 250 mL solution ● Cleaning liquid Part name Model Part number Remarks Cleaning liquid for #220 9096002500 For pH, ORP, and ion electrodes electrodes HORIBA...

  • Page 113: Optional Parts

    Chapter 7 Reference 7.7 Spare and optional parts 7.7.2 Optional parts Part name Part number Remarks AC adapter 9096003100 Be sure to purchase the cable when For Japan 9096003200 AC adapter for purchasing the AC the pH meter adapter. Cable For US 9096003300 For Europe...
  • Page 114 For any question regarding this product, please contact your local agency, or inquire from the Customer Registration website (www.horiba.co.jp/register) First edition:August 2003 CODE：I1001385000...

Table of Contents