Koehler K90601 Operation And Instruction Manual
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Koehler K90601 Operation And Instruction Manual

Ph meter
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K90601, K90691
pH Meter
Operation and Instruction Manual
Koehler Instrument Company, Inc.
1595 Sycamore Avenue • Bohemia, New York 11716-1796 • USA
Toll Free: 1-800-878-9070 (US only) • Tel: +1 631 589 3800 • Fax: +1 631 589 3815
http://www.koehlerinstrument.com • e-mail: info@koehlerinstrument.com
Petroleum Testing & Analysis Instrumentation • Custom Design & Manufacturing

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  • Page 1 K90601, K90691 pH Meter Operation and Instruction Manual Koehler Instrument Company, Inc. 1595 Sycamore Avenue • Bohemia, New York 11716-1796 • USA Toll Free: 1-800-878-9070 (US only) • Tel: +1 631 589 3800 • Fax: +1 631 589 3815 http://www.koehlerinstrument.com • e-mail: info@koehlerinstrument.com...

  • Page 3: Table Of Contents

    CONTENTS SECTION 1 Introduction to pH pH measurement & applications pH Value Chart Features Specifications SECTION 2 Unpacking Installation Panel Details a) Front Panel b) Key Functions c) Back Panel d) Electrode Stand Assembly SECTION 3 Using the Instruments Measurement / Function Mode & Operation Appendix –...
  • Page 4 SECTION Introduction Feature Specifications Page 3 of 44...

  • Page 5: Ph Measurement & Applications

    INTRODUCTION : pH Meter KOEHLER herewith offers you the state-of-the-art micro-controller based pH measurement system with user friendly dialog based easy to use operation, making error free and precise readings. This bench-top pH meter is an ideal help in every laboratory for routine measurement as well as R&D work.
  • Page 6 The pH values of some common industrial and household products/chemicals are given as follows: EXTREMELY ALKALINE 14.0 BOTTLE WASHING 13.0 COPPER PLATING BLEACH 12.0 BRASS PLATING AMMONIA 11.0 MILK OF MAGNESIA 10.0 LIME - SODA SOFTENING BORAX BAKING SODA AQUARIUM SALT WATER SEA WATER SWIMMING POOL WATER...

  • Page 7: Features

    FEATURES: 1 ] Advanced Micro-controller based user friendly state-of-the-art product design. 2 ] Complies to USP and DIN Standards. 3 ] Sleek molded cabinet with Alphanumeric splash-waterproof polyester keyboard with soft keys. 4 ] User interactive software in dialog mode for ease of operation with protection against invalid entries.

  • Page 8: Specifications

    SPECIFICATIONS pH Range : -2.00 to 19.999 Resolution : 0.001 pH Relative accuracy : +/- 0.002 pH Slope : 80% to 120% Sensor : Combination pH electrode / Two separate Electrode Calibration : Auto-calibration with buffer recognition and printout of Calibration report.

  • Page 9: Unpacking

    SECTION Unpacking Installation Panel Details Page 8 of 44...
  • Page 10 UNPACKING After unpacking you will find following parts . – pH Meter, Microcontroller based main unit (115/230 Vac, ±10% / 50/60Hz) KOEHLER pH Electrode - 1 No. RTD PT100 Temperature sensor probe. - 1 No. Electrode stand - 1 No.
  • Page 11 Connect the power cord to a suitable 230 VAC/50 Hz stabilized power supply with proper earth connection. Switch ‘ON’ the meter . The 20 character , 2 line display will read as follows. KOEHLER INSTRUMENTS KOEHLER INSTRUMENTS pH METER Version x.xx...

  • Page 12: B) Key Functions

    Key functions: L.H.S. Keys: Alphanumeric Dual Function ( A~Z , 1~9 ), Zero (0) with Dash (-), Dot (.),Slash(/), decimal point ( . ) and Clear Entry( CE ) Key. R.H.S. Keys: Functional Keys and RESET key. Description of Functional Keys: : To Clear the Stored Readings / Calibration data of the selected Mode from meter Memory.

  • Page 13: C) Back Panel

    2. Back Panel – details 5 Pin Shell Connector for Connector for PT100-RTD pH indicating Temperature / Combination probe Electrode DC Power Adapter Input Connections 4mm Banana 25 Pin D Type 9 Pin D Type socket for Connector for Connector for Reference Printer PC Interface...

  • Page 14: Using The Instruments

    SECTION Using the Instrument Measurement/ Functional Modes Page 13 of 44...
  • Page 15 After the Meter is powered ON, Only two keys are active, i.e. RESET and MODE (page 11). RESET key is used to initialize the Meter. By pressing the RESET key Meter gives Beep and Display reads, KOEHLER INSTRUMENTS KOEHLER INSTRUMENTS pH METER Version x.xx...
  • Page 16 MEASUREMENT / FUNCTIONAL MODES:- The modes can be selected by pressing MODE key repetitively till desired mode/function is displayed and later acknowledged by pressing ENTER key. Please note the Second Line of the display shows the Active Keys. The very first Mode Displayed is, pH Mode.
  • Page 17 A. pH Measurement :- Before starting the pH measurement, Ensure the Instrument is Setup properly as mentioned on Page 9 & 10. Select the pH Mode, Refer page no.15 The Instrument Display reads, Wait ! Stabilising . . pH =+ A.BCD R1 N mV = - PQR.S 27.0°C “Wait Stabilising”...
  • Page 18 I. Selecting Temperature Compensation: TEMPCO The user has two options for temperature selection at which the automatic Temperature compensation is to be considered during Calibration & measurement. ATC at : 1 1) 25°C 2) 20°C For e.g - Compensation with respect to 25°C Press ‘1’ OR for 20°C Press ‘2’, Press Display ATC at : 1...
  • Page 19 Calibration of Instrument and pH Electrode: CAL Press Display S1= XXX S2 = XXX Offset = XXXmV Press Display Enter password Enter Password ******* ENTER (Min.4digit & Max. 8 digit) Ref. Pg. 34 Calibration Mode: 1) Stand. 2) Calib. As a GLP Sequence the User should Perform the Standardisation first and then Calibrate using either Acidic or Basic Buffer.
  • Page 20 If Buffer 7.00 pH and Electrode Offset If Buffer 7.00 pH and Electrode Offset is within  30 mV. Is out off limit (  30 mV ). Calibration Over. Incorrect Buffer or Offset = - 000.0 Probe Faulty. Calibration : 1)Y 2)N To Perform Calibration To end calibration with...
  • Page 21 If the Slope is Within Limits, Slope is Out-off Limit, Display reads, Display reads, Calibration Over . Incorrect Buffer or Probe Faulty Calibration : 1)Y 2)N and instrument waits for Calibration with 3 buffer on Basic side to be performed, To Perform Calibration To end calibration with with 3 Buffer (Basic side)
  • Page 22 Instrument checks the Slope of the Electrode obtained ( Limit = 80 % ~ 120% ) If the Slope is Within Limits, Slope is Out-off Limit, Display reads, Display reads, Calibration Over . Incorrect Buffer or Probe Faulty With Printer connected If printer not connected, Full Calibration Report is Printed with values Printer Not Ready !
  • Page 23 III. Taking pH reading of Sample and Storing :- ENTER Remove the pH electrode from the solution and rinse it with distilled water 2 ~ 3 times , soak the excess water with tissue paper and insert the pH electrode and Temperature sensor (RTD) in the Sample beaker.
  • Page 24 Scanning Stored pH reading :- SCAN The pH meter has memory storage capacity for 40 pH reading with / without Sample Name & ID.NO. The user can select the Stored readings data for viewing by pressing SCAN key and can scroll the readings further by pressing FWD/TEMCO key repeatedly.
  • Page 25 V. Printing the REPORT of pH readings :- PRINT The pH meter provides Report printing facility with an GLP approach. Comprising of Customer Name, Instrument Sr. No., Date and Time, two types of report can be obtained , 1. Report with the user selected pH readings ( by nos.) 2.
  • Page 26 2. Clearing ALL data memory by MEM CLEAR Key. i.e a) Readings, b) Calibration data or c) All ( Both ) at one instant. Display, R10 I pH =+ A.BCD Enter Password CLEAR mV = - PQR.S 27.0°C Enter Password Memory Clear : ENTER XXXX...
  • Page 27 B. mV Measurement : from page no.15 Using the pH meter to measure Absolute millivolt Electrode potential ( mV ) value or Relative millivolt with consideration of OFFSET. Electrode Potential measurement have two main Analytical application. 1. For Ion Concentration Measurement by using ISE electrode. 2.
  • Page 28 Taking mV reading of Sample and Storing :- ENTER The Measurement is similar to pH part. Refer page no. – 22 for explanation. The instrument reads the electrode potential and by pressing ENTER key it gets stored in the mV memory block.
  • Page 29 B. Clearing ALL data memory by MEM CLEAR Key. i.e a) Readings, b) Calibration data or c) All (Both) at one instant. Display, mV Mode No.>40 S Enter Password CLEAR mV = - PQR.S 27.0°C Enter Password Memory Clear : ENTER XXXX 1) Rdgs.
  • Page 30 C. Data Logging of pH v/s Time :- (Optional) from page no.15 Data Logging of pH v/s Time is an important facility for the study of Chemical Kinetics Reaction or Enzymatic Kinetic Reaction. This can be also used for process monitoring in laboratory pilot plant runs.
  • Page 31 No. Of Intervals : ( 1 - 24 ) : 5 pH Limit 2 : pH Limit 1 : _ ENTER Enter the pH Limits ( multiple of 1 pH unit ) which will bracket the pH value being logged during Kinetic reaction.
  • Page 32 D. Probe Check Mode :- from page no.15 Probe check function is another helpful feature to establish the pH electrodes aging. The probe Check function is Similar to the Standardisation of pH electrode with Buffer 7.00 pH. ( Ensure all the precautions required for proper Standardisation – Refer page no. – 18. ) Rinse the pH electrode with distilled water 2~3 times , remove the excess water by soaking it with tissue paper and insert the pH electrode and RTD in 7.00 pH beaker.
  • Page 33 To View the Previous Calibration Record, Press 1) Previous Calib : 1 Calib Remind. : dd/mm/yy Calib. On : dd/mm/yy ENTER 2) Set Reminder Press CE key to return to Reminder function. To Set the Calibration reminder date, Press Calibration Reminder 1) Previous Calib : 2 ENTER 1) ON 2) OFF :...
  • Page 34 Display reads, After 2~3 sec. Calibration : Instru. needs calib 1)Y 2)N ENTER ENTER Calibration Mode: 1) Stand. 2) Calib. Refer Calibration – Page no. 18. Refer Page no. 21. F. Date & Time Mode :- from page no.15 This mode is used to set the Real Time Clock built-in. It Can also be used as the simple Clock when the pH meter has no Sample pH / mV measurement.
  • Page 35 G. Password Setting :- from page no.15. This mode is used to set the user password for protection against unauthorized access to 1)Calibration, 2) Readings in the memory, 3) Stored Calibration data and 4) Setting new Password itself. Password is in Only Numeric from, Entry required is min 4 nos. and max 8 nos. Display Password Mode Enter Old Password...
  • Page 36 APPENDIX - A PRINTER DIP SWITCH SETTINGS FOR COMMONLY AVAILABLE 80 - COLUMN DOT MATRIX PRINTERS 1] EPSON LX-800 [ WIPRO LX-800 ] SWITCH BANK 1. SW2 SW3 SW5 SW6 SW7 SW8 SWITCH BANK 2. SW1 SW2 SW3 SW4 Automatic line feed TVSE NOTE : After switches are correctly set turn the printer OFF and ON again to load the new...
  • Page 37 APPENDIX – B ALPHANUMERIC Data Entry Alpha numeric Entries are required for Sample Name & ID.NO. To enter SAMPLE NAME: e.g. KCL1A Please follow the Sequence for key entries Display - Sample Name :  Press Twice Press Thrice Press Thrice Press 4 times Press 4 times Display reads,...
  • Page 38 SECTION Storage of Electrodes Helpful Measurement Hints Gel-filled combination pH electrodes (Instruction Manual) Page 37 of 44...

  • Page 39: Storage/Care Of Electrodes

    STORAGE/CARE OF ELECTRODES 1. pH Electrode :- For fast response of the pH electrode during sample measurements, the electrode is to be soaked in a slightly acidic solution. Also pH electrodes should always be stored in a moist condition, in either a 7.00 pH buffer saturated with KCL or 3M KCL solution between routine measurements.
  • Page 40 * Replace / Reactivate the electrode with a new one, if the deviation is more than 0.3 pH for a 4.00 pH or 9.00 / 10.00 pH buffer before calibration. 2. For Conductivity Measurement :- * Keep the conductivity probe clean and dry. Rinse the probe 2~3 times to remove the carry over, and gently swirl it while you take readings.

  • Page 41: Gel-Filled Combination Electrode

    GEL-FILLED COMBINATION pH ELECTRODES INSTRUCTION MANUAL GENERAL INFORMATION Introduction The Gel-Filled Combination Electrode is designed for routine pH measurements under rugged conditions. The unbreakable body extends beyond the pH sensing glass bulb for protection. The sealed reference section permanently filled with a KCI gel never needs refilling. USING THE ELECTRODE Set Up Electrode Preparation...
  • Page 43 This procedure is recommended for precise measurement. 1. Choose two buffers which bracket the expected sample pH. The first should be pH 7 and the second near the expected sample pH (e.g. pH 4 or 10). 2. Ensure that buffers are at room temperature. If samples are at varying temperatures, temperature compensation is recommended (see meter instruction manual).

This manual is also suitable for:

K90691

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