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Myron L ULTRAMETER II 6P - User Manual

Myron L ULTRAMETER II 6P
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11 Nov 08
Operation
Manual
MODELS 6P & 4P
ULTRAMETER

Table of Contents

Questions and Answers

  • R
    Robert VangJul 31, 2025
    Why are my Conductivity/TDS/Resistivity readings unstable on Myron L Analytical Instruments?
    • G
      Gary FitzgeraldJul 31, 2025
      Unstable readings in Conductivity, TDS, or Resistivity measurements with Myron L Analytical Instruments can often be traced to dirty electrodes. Cleaning the electrodes can resolve this. Also, ensure that the test samples have appropriate conductivity, especially if they are greater than 1 megohm.
  • M
    Maria PetersonAug 4, 2025
    What to do if Myron L ULTRAMETER II 6P have no display even when the measurement key is pressed?
    • J
      Jennifer TranAug 4, 2025
      If your Myron L 6P Analytical Instrument shows no display when you press the measurement key, the battery may be weak or not properly connected. Check the battery connections and replace the battery if necessary.
  • G
    gdiazAug 8, 2025
    Why are the pH readings inaccurate on my Myron L 6P Analytical Instruments?
    • J
      Justin RiveraAug 8, 2025
      Inaccurate pH readings on your Myron L 6P Analytical Instruments can stem from several causes. It could be due to the need for pH calibration. Another potential cause is cross-contamination from residual pH buffers or samples in the sensor well, so ensure you clean the sensor well thoroughly. Also, using fresh pH buffers for calibration is important, as expired buffers can lead to inaccuracies.
  • B
    Brittany MartinezAug 12, 2025
    What to do if Myron L 6P Analytical Instruments show no response to pH changes?
    • S
      Stacey HicksAug 12, 2025
      If your Myron L 6P Analytical Instruments show no response to pH changes, the sensor bulb might be cracked, or there could be an electromechanical short due to an internal crack. Inspect the sensor for damage and replace it if necessary.
  • D
    Donald ParkerAug 17, 2025
    Why are resistivity readings much lower than expected on Myron L ULTRAMETER II 6P Analytical Instruments?
    • C
      Curtis MillerAug 17, 2025
      If the resistivity readings on your Myron L Analytical Instruments are much lower than expected, it could be due to contamination from a previous sample or from the pH sensor well. Cleaning the pH sensor well and electrodes may help. Also, carbon dioxide in the test sample can cause this issue, so ensure your sample is free from carbon dioxide.
  • H
    hallamyAug 21, 2025
    What to do if Myron L 6P Analytical Instruments will not adjust down to pH 7?
    • J
      Joyce Smith DDSAug 21, 2025
      If your Myron L 6P Analytical Instruments will not adjust down to pH 7, it's possible that the pH/ORP sensor has lost KCl. Replenishing the KCl in the pH/ORP sensor should resolve this issue.
  • D
    Donald RandallAug 26, 2025
    Why do pH readings drift on Myron L 6P Analytical Instruments?
    • J
      jimenezryanAug 26, 2025
      Drifting pH readings or slow response to changes in buffers/samples, or repeated display of “FAC” on your Myron L 6P Analytical Instruments, can be caused by several factors. It may be a temporary condition due to the sensor's “memory” of a solution in the pH sensor well for extended periods; in this case, allow the sensor to stabilize. Alternatively, the bulb might be dirty or dried out, so clean the pH sensor bulb. A clogged or coated reference junction can also cause these issues; clear any blockage in the reference junction.

Summary

Rules of Operation

Basic Instrument Operation

Step-by-step guide to using the instrument for measurements.

Measurement Key Functions

Describes how measurement keys turn on the instrument and select modes.

pH and ORP Key Operations (6 P)

Explains how to use the pH and ORP measurement keys.

Recommended Measuring Procedures

Measuring Conductivity and TDS

Step-by-step guide for measuring conductivity and TDS.

Measuring Resistivity

Procedure for accurate resistivity measurements, including sample handling.

Measuring pH (6 P)

Detailed steps for measuring pH, including sensor preparation.

Solution Selection Guide

Using the USER Solution Type

Details how to apply the USER solution type for custom settings.

User Programmable Temperature Compensation (Tempco)

Allows setting a custom temperature compensation factor.

User Programmable Conductivity to TDS Ratio

Allows setting a custom conductivity to TDS conversion ratio.

Procedure for Selecting a Solution

Step-by-step instructions on how to select the desired solution type.

Calibration Procedures

Specific Calibration Procedures

Detailed steps for calibrating different measurement parameters.

Resistivity Calibration

Procedure for calibrating resistivity measurements.

pH Calibration Steps (6 P)

Detailed procedure for calibrating pH, including zero and gain.

pH Gain Calibration (6 P)

Procedure for the gain adjustment in pH calibration.

Calibration Steps Overview

General steps involved in initiating and performing calibration.

Conductivity or TDS Calibration

Detailed steps for calibrating conductivity or TDS measurements.

ORP Calibration (6 P)

Explanation of ORP calibration and its electronic nature.

User Calibration for Conductivity;TDS

Procedure for user-defined calibration of conductivity/TDS.

Calibration Intervals

Memory Functions

Storing Readings in Memory

Instructions on how to store measurements and their temperatures in memory.

Factory Settings Reset (FAC SEL)

Cell Check Function

User Mode Calibration Linc Function

Setting User Mode Calibration Link (Linc)

Links a standard solution's calibration gain to User mode.

Care and Maintenance

Troubleshooting Chart

Temperature Compensation (Tempco) of Aqueous Solutions

Conductivity Conversion to Total Dissolved Solids (TDS)

Temperature Compensation (Tempco) and TDS Derivation

pH and ORP Measurements (6 P)

Understanding pH Measurement (6 P)

Explains pH as a measure of acidity/alkalinity and its units.

pH as an Acidity;Alkalinity Indicator

Defines pH and its role in indicating solution acidity or alkalinity.

ORP;Redox Measurement (6 P)

Explains ORP as a measure of oxidizing/reducing activity in solutions.

ORP as an Activity Indicator

Defines ORP and its relation to oxidizing and reducing potential.

Myron L ULTRAMETER II 6P Specifications

General IconGeneral
Measurement ParameterspH, ORP, Conductivity, Resistivity, TDS, Salinity, Temperature
pH Range0 to 14 pH
Temperature Range0 to 71 °C
Accuracy±1% of reading
Resolution0.01 pH
Temperature CompensationAutomatic
Power Supply9V battery
Battery Life>100 hours
DisplayLCD
Operating Conditions0 - 55 °C / 32 - 131 °F
Storage Conditions-20 to 60 °C (-4 to 140 °F), 0 to 95% RH non-condensing

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