Myron L TechPro II Operation Manual
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Myron L TechPro II Operation Manual

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TECHPRO
™
Operation
Manual
MODELS TPH1, TP1
®
18 February 16

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Summary of Contents for Myron L TechPro II

  • Page 1 TECHPRO ™ Operation Manual MODELS TPH1, TP1 ® 18 February 16...
  • Page 3 Instrument Illustration Reference Junction pH Sensor (Under Glass (User replaceable) Bulb) Conductivity Cell pH Glass (Built-in Electrode Electrodes) pH Sensor Temperature Protective Cap Sensor Preprogrammed conductivity/ TDS ratios mS - millisiemens/cm Conductivity/ (millimhos/cm) Salinity Displayed here: µS - microsiemens/cm • Temperature (micromhos/cm) Conductivity °C °F...

  • Page 5: Introduction

    Additionally, “salinity” units may be selected. See Features and Specifications on pages 2 & 3. For your convenience, on the bottom side of your TechPro II is a brief set of instructions. Special note ... For the TPH1 & TP1 models, conductivity and TDS require mathematical correction to 25°C values (ref.

  • Page 6: Features And Specifications

    FEATURES and SPECIFICATIONS A. Features • Ranges: Conductivity/ TDS — 0- 20,000 µS/ppm (TPH1 & TP1) pH — 0 -14 (TPH1) • Superior resolution four (4) digit LCD • Conductivity/TDS accuracy of ± 1% of reading • pH accuracy of ± .01 pH units (TPH1) •...

  • Page 7: Specification Chart

    **If either ORP or pH is outside the specified limits, the instrument will display “-Or-”. D. Warranty/Service The Myron L TechPro II™, excluding the pH sensor (TPH1), has a Two (2) Year Limited Warranty. The pH sensor (TPH1) has a Six (6) Month Limited Warranty.

  • Page 8: Table Of Contents

    5. UP or DOWN Keys ....7 AFTER USING the TechPro II......8 A.
  • Page 9 C. pH Sensor (TPH1) ..... . . 30 D. Myron L Integral pH Sensor (TPH1) ..31 E.

  • Page 10: Rules Of Operation

    Note the value displayed or press the MS key to store the reading (ref. Memory Storage, pg. 16). It’s that simple! B. Characteristics of the Keys Though your TechPro II has a variety of sophisticated options, • it is designed to provide quick, easy, accurate measurements by simply pressing one key.

  • Page 11: Ph Key (Tph1)

    Sensor Storage Solution. After use, the pH sensor well must be refilled with Myron L pH Sensor Storage Solution, and the protective cap reinstalled securely (ref.

  • Page 12: After Using The Techpro Ii

    B. Maintenance of the pH Sensor (TPH1) The sensor well must be kept wet with a solution. Before replacing the rubber cap, rinse and fill the sensor well with Myron L pH Sensor Storage Solution. If unavailable, use an almost saturated KCl solution, pH 4 buffer (ref.

  • Page 13: Solution Selection (Tph1 & Tp1)

    IMPORTANT: After use, fill pH sensor well with Myron L pH Sensor Storage Solution and replace protective cap. If Myron L pH Sensor Storage Solution is unavailable, use a strong KCl solution, a pH 4 buffer, or a saturated solution of table salt and tap water (ref.

  • Page 14: Calibration

    Generally, calibration is recommended about once per month with Conductivity or TDS solutions. Calibration with pH solutions should be checked twice a month. (ref. CALIBRATION INTERVALS, pg. 14). B. Rules for Calibration of the TechPro II 1. Calibration Steps a. Starting Calibration...

  • Page 15: Calibration Limits

    To bypass a calibration step, simply press to accept the present value as is. b. Leaving Calibration Calibration is complete when the “CAL” icon goes out. Pressing any measurement key cancels changes not yet accepted and exits calibration mode. Leaving pH after the 2nd buffer results in the same gain being entered in place of the 3rd buffer.

  • Page 16: Reloading Factory Calibration

    3. pH Calibration (TPH1) Important: Always “zero” your TechPro II with a pH 7 buffer solution before adjusting the gain with acid or base buffers, i.e., 4 and/or 10. a. pH Zero Calibration (TPH1) Rinse sensor well 3 times with 7 buffer solution.
  • Page 17 TechPro II will not adjust. The uncalibrated pH value displayed in step 4 will assist in determining the accuracy of the pH sensor. If the pH reading is above 8 with pH 7 buffer solution, the sensor well needs additional rinsing or the pH sensor is defective and needs to be replaced .

  • Page 18: Calibration Intervals

    CALIBRATION INTERVALS There is no simple answer as to how often one should calibrate an instrument. The TechPro II is designed to not require frequent recalibration. The most common sources of error were eliminated in the design, and there are no mechanical adjustments. Still, to ensure specified accuracy, any instrument must be checked against chemical standards occasionally.

  • Page 19: Calibration Tracking Records

    Changes in conductivity calibration should be recorded in percent. Changes in pH calibration (TPH1) are best recorded in pH units. Calibration is purposely limited in the TechPro II to ± 10% for the conductivity cell, as any change beyond that indicates damage, not drift.

  • Page 20: Memory Storage

    A. Memory Storage While displaying a measurement, press to record the displayed value. “MEMORy” will appear and the MEMORY temperature display will be momentarily replaced by a number (1-20) showing the position of the record. Figure °C 6 shows a reading of 1806 µS stored in memory record #4.

  • Page 21: Temperature Format "Centigrade & Fahrenheit

    Fill pH sensor well with sample. Press to measure sample and press to store reading in location #3. The next memory stored will go into location #8. MEMORY To clear all records: After pressing , scroll down. ALL” will be displayed “CL (see Figure 7).

  • Page 22: Salinity Units (Tph1 & Tp1)

    Press repeatedly until “tc On” is displayed Press (see Figures 10 and 11). ; the display will change to “tc OFF”. Press Press ; all conductivity and TDS measurements are now uncompensated. Repeat steps 1-4 to reverse selection back to “tc On”. Figure 10 Figure 11 XII.

  • Page 23: Total Return To Factory Settings

    Press any measurement key. Press repeatedly until “FAC SEL” is displayed (see Figure 14). Figure 14 Press to accept the resetting. Display will return to COND. XIV. CARE and MAINTENANCE Your TechPro II should be rinsed with clean water after each use.

  • Page 24: Temperature Extremes

    TechPro II temperature is allowed to go below 0°C/32°F. Care should be exercised not to exceed rated operating temperature. Leaving the TechPro II in a vehicle or storage shed on a hot day can easily subject the instrument to over 66°C/150°F.
  • Page 25 Leaving high pH (alkaline) solutions in contact with the pH sensor for long periods of time is harmful and will cause damage. Rinsing such liquids from the pH sensor well and refilling it with Myron L pH Sensor Storage Solution, a saturated KCl solution or a saturated solution of table salt and tap water, will extend the useful life.

  • Page 26: Troubleshooting Chart

    TROUBLESHOOTING CHART Symptom Possible Cause No display, even Battery weak or not connected though measurement key pressed Inaccurate pH readings 1. pH calibration needed (ref. pH Cal, pg. 12). (TPH1) 2. Cross-contamination from residual pH buffers or samples in sensor well. 3.
  • Page 27 Corrective Action Check connections or replace battery (ref. Battery Replacement, pg. 20). 1. Recalibrate instrument. 2. Thoroughly rinse sensor well. 3. Recalibrate using fresh buffers (ref. pH Buffer Solutions, pg. 24). Replace pH sensor (ref. pH Sensor Replacement, pg. 20). Clean and rejuvenate sensor (ref.

  • Page 28: Accessories

    NaCl equivalent to the conductivity and to ppm 442 values. The 14.0 mS is the recommended standard. Order NACL-14.0 B. pH Buffer Solutions (TPH1) pH buffers are available in pH values of 4, 7 and 10. Myron L Company ®...

  • Page 29: Soft Protective Case

    KCl solution is a standard set by chemists that standardizes the measurements and allows calibration with precise KCl solutions. In the TechPro II, this correction can be set to either KCl, NaCl or 442 to best match your applications.

  • Page 30: An Example

    2.500% 2.400% 2.300% 2.200% 2.100% % / °C 2.000% 1.900% 1.800% KCl % / °C 1.700% 1.600% Temperature 1.500% 20 25 30 35 40 45 55 60 Chart 1 C. An Example of 2 different solution selections and the resulting compensation How much error results from treating natural water as if it were KCl at 15°C? A tap water solution should be compensated as 442 with a tempco of...

  • Page 31: Other Solutions

    The TechPro II gives the user the capability to collect data in “KCl conductivity units” to compare to older published data, as in terms of...

  • Page 32: Conductivity Conversion To

    ® standard, as it does KCl and NaCl standard solutions. The TechPro II contains algorithms for these 3 most commonly referenced compounds. The solution type in use is displayed on the left. C. When does it make a lot of difference? First, the accuracy of temperature compensation to 25°C determines the...

  • Page 33: Temperature Compensation (Tempco)

    NaCl mode because their previous data gathering and process monitoring was done with an older NaCl referenced device. Selecting the correct Solution Type on the TechPro II will allow the user to attain true TDS readings that correspond to evaporated weight.

  • Page 34: Ph Units (Tph1)

    A 4% solution of acetic acid (pH 4, vinegar) can be quite palatable, but a 4% solution of sulfuric acid (pH 0) is a violent poison. pH provides the needed quantitative information by expressing the degree of activity of an acid or base. In a solution of one known component, pH will indicate concentration indirectly.

  • Page 35: Myron L Integral Ph Sensor (Tph1)

    The symptom is a drift in the “zero” setting at 7 pH. This is why the TechPro II does not allow more than 1 pH unit of offset during calibration. At that point the junction is unreliable.

  • Page 36: Software Version

    XXI. SOFTWARE VERSION Contact the Myron L Company to see if a software upgrade is available. ® Press any measurement key. Press key until three numbers are displayed as shown in Figure 17. Press any measurement key, instrument will time out in ~20 seconds.

  • Page 37: Glossary

    XXII. GLOSSARy Anions Negatively charged ions. See Solution Characteristics, pg. 28. Algorithm A procedure for solving a mathematical problem. See Temperature Compensation and TDS Derivation, pg. 28. Logarithm An arithmetic function. See pH Units, pg. 30. Total Dissolved Solids or the Total Conductive Ions in a solution.

  • Page 38: Addendum

    XXIII. ADDENDUM...

  • Page 40: Notes

    XXIV. NOTES...
  • Page 44 MyRON L COMPANy ® 2450 Impala Drive Carlsbad, CA 92010-7226 Tel: +1-760-438-2021 Fax: +1-760-931-9189 E-Mail:info@myronl.com techquestions@myronl.com www.myronl.com Made In USA TPIIOM 18FE16...

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