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Summary of Contents for Myron L Ultrameter 6P
- Page 1 Ultrameter ™ Operation Manual Model 6P MYRON L COMPANY 9-00...
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Page 2: Instrument Illustration
Instrument Illustration Reference pH/ORP Sensor Junction under (Replaceable) Glass pH Bulb Electrode pH Glass Electrode Conductivity Cell (Built-in Electrodes) Temperature pH/ORP Sensor Sensor Protective Cap Preprogrammed variable conductivity/ TDS ratios Units of Measurement Parameter Megohms - cm Resistivity USER mode LOBATT CAL MEMORY Ω... -
Page 3: Features And Specifications
**10K ohms - 10M ohmsΩ D. Warranty/Service B. General Specifications All Myron L Ultrameters have a one-year warranty except for pH sensors Display 4 Digit LCD which have a 6-month limited warranty. If an instrument fails to operate Dimensions (LxWxH) 7.7x2.7x2.5 in. -
Page 4: Table Of Contents
TABLE OF CONTENTS CALIBRATION ......... .14 A. -
Page 5: Introduction
Aqueous Solutions ......29 Thank you for selecting the Ultrameter™ Model 6P, one of the Myron L A. -
Page 6: Operation Of The Keys
B. Maintenance of the pH/ORP Sensor After use, the pH/ORP sensor well must be refilled with Myron L Storage The sensor well must be kept wet with a solution. Before replacing the Solution, and the protective cap reinstalled securely (ref. Maintenance of rubber cap, rinse and fill the sensor well with (in order of preference): the pH/ORP Sensor, pg. -
Page 7: Specific Recommended Measuring Procedures
N O T E : After sampling high concentration solutions or temperature extremes, more rinsing may be required. When sampling low conductivity IMPORTANT : After use, fill pH/ORP sensor well with Myron L solutions, be sure the pH cap is well seated so no solution washes into Storage Solution, a strong KCl solution or pH 4 buffer, and the conductivity cell from around the pH cap. -
Page 8: Calibration Of Each Solution Type
conversion. Generally, using KCl for conductivity, NaCl for resistivity, and Temperature Compensation, pg. 29). This feature does not apply to pH 442 (Natural Water characteristic) for TDS will reflect present industry or ORP. practice for standardization. This is the setup as shipped from the factory (ref. -
Page 9: Ratio
While in “USER” mode, press Depending on what is being calibrated, there may be 1, 2 or 3 steps to T D S the calibration procedures. Press twice (to skip over tempco adjustment), and MCLR KCl, NaCl or 442 User “RATIO ”... -
Page 10: User Calibration Conductivity/Tds
Refill conductivity cell with same standard. 4. Reloading Factory Calibration (Cond or TDS) If calibration is suspect or known to be wrong, and no standard solution is Press , then available, the calibration value can be replaced with the original factory COND value for that solution. -
Page 11: Orp Calibration
3rd point of calibration which ends MCLR The pH calibration mode is initiated by either completion of the Calibration procedure. Fill sensor well with Myron L Storage Solution and replace protective cap. pH Zero Calibration, or verifying 7 buffer and pressing the MCLR twice while in pH measurement mode. -
Page 12: Temperature Calibration
for ORP are highly reactive and potentially hazardous, your Ultrameter available memory location. has an electronic ORP calibration. This causes the zero point on the Example: You have locations 1-7 filled. You want to clear the conductivity reference electrode to be set whenever pH 7 calibration is done. reading stored in record location #3 and replace it with a pH reading. -
Page 13: Total Return To Factory Settings
CALIBRATION INTERVALS There is no simple answer as to how often one should calibrate an instrument. The Ultrameter 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 has to be checked against chemical Figure 11 Figure 12... -
Page 14: Ph And Orp Practices
The conductivity cell cup should be kept as clean as possible. Flushing with clean water following use will prevent buildup on electrodes. Keep the sensor wet with Myron L Storage Solution. However, if very dirty samples — particularly scaling types — are allowed to dry in the cell cup, a film will form. - Page 15 Leaving high pH (alkaline) solutions in contact with the pH sensor for long periods of time can damage it. Rinsing such liquids from the pH/ORP sensor well and refilling well with Myron L Storage Solution, a saturated KCl solution, pH 4 buffer, or a salty tap water, will extend the sensor’s useful life.
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Page 16: Cleaning Sensors
XII. TROUBLESHOOTING CHART Symptom Possible Cause Corrective Action No display, even though Battery weak or not connected. Check connections or replace battery measurement key pressed (ref. Battery Replacement, pg. 24). Inaccurate pH readings 1. pH calibration needed (ref. pH Cal., pg. 17). 1. -
Page 17: Accessories
B. pH Buffer Solutions characteristics of solutions, perhaps even assuming a constant value. pH buffers are available in pH values of 4, 7 and 10. Myron L Company The value for KCl is often quoted simply as 2%/°C. In fact, KCl tempco buffer solutions are traceable to NIST certified pH references and are varies with concentration and temperature in a non-linear fashion. -
Page 18: An Example
D. A Chart of Comparative Error: In the range of 1000 µS, the error using KCl on a solution that should be 2.500% compensated as NaCl or as 442, is shown in the graph below. 2.400% 2.300% 442 error with KCl tempco 2.200% NaCl error with KCl tempco 2.100%... -
Page 19: Conductivity Conversion To Total Dissolved Solids (Tds)
TDS conversion values of a unique solution from the Company calls “natural water”. These are modeled in a mixture called keyboard. “442” which the Myron L Company markets for use as a calibration standard, as it does standard KCl and NaCl solutions. A. Conductivity Characteristics... -
Page 20: Finding The Tempco Of An Unknown
Another solution would have a different tempco because of its ionization effective, not the total, acidity of a solution. activity. And, that tempco may be a little different at a different concentration or temperature. This is why the Ultrameter uses A 4% solution of acetic acid (pH 4, vinegar) can be quite palatable, but a mathematically generated models for known salt characteristics that vary 4% solution of sulfuric acid (pH 0) is a violent poison. -
Page 21: Orp/Oxidation-Reduction Potential/Redox
KCl solution 2. ORP Units Figure 14 4. The Myron L Integral pH Sensor ORP is measured in millivolts, with no correction for solution temperature. The sensor in the Ultrameter (figure 15) Like pH, it is not a measurement of concentration directly, but of activity... -
Page 22: Glossary
XVIII. GLOSSARY Anions - Negatively charged ions. See Solution Characteristics, pg. 32. Algorithm - A procedure for solving a mathematical problem. See Temperature Compensation and TDS Derivation, pg. 33. Logarithm - An arithmetic function. See pH Units, pg. 35. Oxidation-Reduction Potential or REDOX, See ORP/ Oxidation-Reduction Potential/REDOX, pg. -
Page 23: Addendum
Ultrameter ™ Operation Manual Addendum Models 4P & 6P Software Versions 2.03, 2.10, 2.51 & Later* * See page 5 to determine the version of software of your Ultrameter™. UMMA10-01... -
Page 24: High Resistivity Measurements
Cell Check For Instruments with Software Version 2.10 & Later. ENHANCED HIGH RESISTIVITY MEASUREMENTS In these versions, a Cell Check feature has been added to further increase the performance of your instrument. This is especially important The resistivity calculations in the Ultrameter have been improved for when in R E S mode reading High Resistivity or Ultrapure waters. -
Page 25: Calibration Of Ultrameter For Use In User Mode
USER MODE CALIBRATION LINK Press the key. The MCLR A new function has been added to the Ultrameter that makes calibration instrument will display "S E L " of the unit while in "User" mode easier, and more repeatable and accurate and the “User”... -
Page 26: Checking Your Instruments Software Version
LINK are available. Figure 9 Press COND key, instrument will time out in ~15 seconds. If one of the listed versions is NOT displayed, and these functions are required, contact the Myron L Company for information on upgrading your instrument.
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