ULTRAMETER ™ Operation Manual MODELS 6Psi & 4P 08 September 10
bluDock Enabled
Instrument Illustration Reference Junction under Glass pH Bulb pH/ORP Sensor (Replaceable) ORP Electrode pH Glass Electrode Conductivity Cell (Built-in Electrodes) Temperature Sensor pH/ORP Sensor Protective Cap TEST Value Preprogrammed variable conductivity/ TDS ratios USER mode for programming special temperature compensation factor and conductivity/TDS ratio RATIO COND Time & Date displayed here ORP RES % / °C BUFFER pH TDS These Measurement keys will: • Turn instrument on • Measure parame
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I. INTRODUCTION Thank you for selecting the feature-packed Ultrameter II™, one of the Myron L Company’s latest in an increasing line of instruments utilizing advanced microprocessor-based circuitry and SMT manufacturing processes. This circuitry makes the instrument extremely accurate, reliable and very easy to use. Model 6Psi has been redesigned to include free chlorine measurements and a LSI & Hardness Calculator for water balance analysis.
II. • • • • • • • • • • • • • • • • • FEATURES and SPECIFICATIONS A. Features Bluetooth® wireless download capability with optional bluDock™ ORP mV to ppm free chlorine conversion (6Psi) Langelier Saturation Index & Hardness Calculator (6Psi) Superior resolution 4 digit LCD displays full 9999 µS/ppm Accuracy of BETTER than ±1% of reading in a handheld instrument ±0.
C. Specification Chart Free Chlorine The LSI Calculator (6Psi) hardness range is limited to 0.0 - 1710 ppm and 0.0 - 100 grains of hardness. D. Warranty/Service The Myron L Ultrameter II, excluding the pH/ORP sensor (6Psi), has a Two (2) Year Limited Warranty. The pH/ORP sensor (6Psi) has a Six (6) Month Limited Warranty for materials and workmanship. If an instrument fails to operate properly, see Troubleshooting Chart, pg. 34. The battery and pH/ORP sensor are user-replaceable.
TABLE OF CONTENTS Instrument Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i I. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 II. FEATURES and SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . 2 A. Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 B. General Specifications . . . . . . . . . . . . . . . . . . . . . . 2 C. Specification Chart . . . . . . . . . . . . . . . . . . . . . . . . .
VIII. IX. X. XI. XII. XIII. XIV. XV. XVI. XVII. XVIII. B. Rules for Calibration of the Ultrameter II . . . . . . . 1. Calibration Steps . . . . . . . . . . . . . . . . . . . 2. Calibration Limits . . . . . . . . . . . . . . . . . . . C. Calibration Procedures . . . . . . . . . . . . . . . . . . . . . 1. Conductivity or TDS Calibration . . . . . . . 2. User Calibration Conductivity/TDS . . . . . 3. Resistivity Calibration . . . . . . . . . . . . . . . 4. Reloading Factory Calibration (Cond or TDS) .
XIX. ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 A. Conductivity/TDS Standard Solutions . . . . . . . . . 36 B. pH Buffer Solutions (6Psi) . . . . . . . . . . . . . . . . . . 36 C. pH Sensor Storage Solution (6Psi) . . . . . . . . . . . 36 D. Soft Protective Carry Cases . . . . . . . . . . . . . . . . . 36 E. Hard Protective Carry Cases . . . . . . . . . . . . . . . . 37 F. Replacement pH/ORP Sensor (6Psi) . . . . . . . . . . 37 G.
III. RULES of OPERATION A. Operation Using the instrument is simple: • Individual or multiple parameter readings may be obtained by filling individual sensors or entire cell cup area. • Rinse the conductivity cell or pH/ORP sensor (6Psi) well with test solution 3 times and refill. Temperature and/or measurement extremes will require additional rinses for maximum accuracy. • Press the desired measurement key to start measurement. Pressing the key again restarts the 15 second auto “off” timer.
A press of b. RES Key displays resistivity with units on the right. On the left is shown solution type selected for resistivity (ref. Solution Selection, pg. 11). The range of display of resistivity is limited to between 10 kilohms (KΩ) and 30 megohms (MΩ). A solution outside that range will only show [- - - -] in the display. c. TDS Key A press of displays Total Dissolved Solids with units on the right.
5. UP or DOWN Keys While measuring in any parameter, the or keys activate the Memory Store and Memory Recall functions. While in “CAL” mode, the keys step or scroll the displayed value up or down. A single press steps the display and holding either key scrolls the value rapidly. While in Memory Recall, the keys scroll the display up and down through the stack of records (ref. Memory Recall, pg. 21). IV. AFTER USING the Ultrameter II A.
B. Measuring Resistivity Resistivity is for low conductivity solutions. In a cell cup the value may drift from trace contaminants or absorption from atmospheric gasses, so measuring a flowing sample is recommended. 1. Ensure pH protective cap is secure to avoid contamination. 2. Hold instrument at 30° angle (cup sloping downward). 3. Let sample flow continuously into conductivity cell with no aeration. 4. Press key; use best reading.
concentration is over the range limit (> 9.99 ppm). “Ur” (under range) will display when the concentration is below the range limit (< 0.20 ppm). 6. IMPORTANT: After use, fill pH/ORP 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. Cleaning Sensors, 2. pH/ORP, pg. 32). Do not allow pH/ORP sensor to dry out.
you wish to change the solution type. 2. Press and hold KCl NaCl 442 User key for 3 seconds to make “SEL” appear (see Figure 1). For demonstration purposes, all 4 solution types are shown simultaneously. 3. Use the or Figure 1 key to select type of solution desired (ref. Solution Characteristics, pg. 40). The selected solution type will be displayed: KCl, NaCl, 442 or User. 4. Press to accept new solution type. E. Application of User Solution Type 1.
2. Disabling Temperature Compensation a. Select “User” mode (ref. Procedure to Select a Solution, pg. 11). b. With “User” selected, press show .00%/°C, hold . If the display does not long enough to bring the tempco to .00%/°C (see Figure 3). c. Press twice (3 times if in TDS mode). Temperature compensation is now disabled (=0) for measurements in “User” mode. User % / °C COND Figure 3 3.
VII. CALIBRATION A. Calibration Intervals Generally, calibration is recommended about once per month with Conductivity or TDS solutions. Calibration with pH solutions should be checked twice a month. Calibration of ORP is not necessary (ref. CALIBRATION INTERVALS, pg. 19). B. Rules for Calibration of the Ultrameter II 1. Calibration Steps a. Starting Calibration Calibration is begun by pressing while measuring Conductivity, TDS or pH.
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. 2. Calibration Limits There are calibration limits. A nominal “FAC” value is an ideal value stored by the factory. Attempts to calibrate too far, up or down, from there will cause the displayed value to be replaced with “FAC”.
a. Rinse conductivity cell three times with your standard. b. Refill conductivity cell with same standard. c. Press or , then press twice in COND/three times in TDS. The “CAL” icon will appear on the display. d. Press or to step the displayed value toward the standard’s value or hold a key down to scroll rapidly through the reading. e. Press once to confirm new value and end the calibration sequence for this particular solution type. 3.
5. pH Calibration (6Psi) Important: Always “zero” your Ultrameter II with a pH 7 buffer solution before adjusting the gain with acid or base buffers, i.e., 4 and/or 10, etc. a. pH Zero Calibration (6Psi) 1. Rinse sensor well and cell cup 3 times with 7 buffer solution. 2. Refill both sensor well and cell cup with 7 buffer solution. 3. Press to verify the pH calibration. If the display shows 7.00, skip the pH Zero Calibration and proceed to section b. pH Gain Calibration. 4.
reduce your variation from factory setting by pressing 6. Press or . to accept the new value. The pH Zero Calibration is now complete. You may continue with pH Gain Calibration or exit by pressing any measurement key. b. pH Gain Calibration (6Psi) Important: Always calibrate or verify your Ultrameter II with a pH 7 buffer solution before adjusting the gain with acid or base buffers, i.e., 4 and/or 10, etc.
6. Press to accept 2nd point of calibration. Now the display indicates the next type of buffer to be used. Single point Gain Calibration is complete. You may continue for the 3rd point of Calibration (2nd Gain) or exit by pressing any measurement key. Exiting causes the value accepted for the buffer to be used for both acid and base measurements. To continue with 3rd point calibration, use basic buffer if acidic buffer was used in the 2nd point, or vice-versa.
B. Calibration Tracking Records To minimize your calibration effort, keep records. If adjustments you are making are minimal for your application, you can check less often. Changes in conductivity calibration should be recorded in percent. Changes in pH calibration (6Psi) are best recorded in pH units. Calibration is purposely limited in the Ultrameter II to ±10% for the conductivity cell, as any change beyond that indicates damage, not drift.
IX. MEMORY This feature allows up to 100 readings with their temperatures to be stored simultaneously for later recall. At the same time, the TIME and DATE are also recorded. To download the memory to a computer, (ref. bluDock™ Wireless Data Transfer Instructions, pg. 30). 1. 2. A. Memory Storage While displaying a measurement, press to record the displayed value.
1. Press and scroll to location #3. 2. Press and HOLD 3. Fill pH/ORP sensor well with sample. 4. Press to clear old record #3. to measure sample and press to store reading in location #3. 5. The next memory stored will go into location #8. 6. To clear all records: After pressing MEMORY , scroll down. “CLr ALL” will be displayed (see Figure 10). 7. Press . All records will Figure 10 be cleared. X. TIME and DATE The Time and Date may easily be changed as you travel. A.
4. Press the 5. Press or to change the time. to accept the change (new time). B. Setting DATE Example shown in Figure 12 is in US format, i.e., mo/dy/yr. NOTE: The default format is US. Date format may be changed (ref. Date Format “US and International (Int)”, pg. 24). Figure 12 1. Press . 2. Press repeatedly until the date is displayed (scrolling through stored readings, PC OFF, CLr ALL and time to the date, e.g., 03.05 10 (Figure 12), March 5, 2010). 3. Press to initiate.
8. Press the or CAL to change the day. 9. Press to accept the change (new day) (see Figure 15). Figure 15 C. DATE FORMAT “US & International (Int)” 1. Press . 2. Press repeatedly until the format is displayed (scrolling through stored readings, PC OFF, CLr ALL, time and date to date format). 3. Press to change. Display will now indicate other format (see Figures 16 & 17). 4. Press any measurement key or allow to automatically turn off. Figure 16 Figure 17 XI.
format location. The display will show a “C” or “F” (see Figures 18 and 19). Figure 18 Figure 19 4. Press to switch units. 5. Press to accept unit preference for all temperature readings. NOTE: Tempco will still be shown in %/°C. XII. TOTAL RETURN to FACTORY SETTINGS “FAC SEL” There may come a time when it would be desirable to quickly reset all the recorded calibration values in the instrument back to the factory settings.
XIII. CELL CHECK The cell check verifies the cleanliness of the conductivity/TDS/resistivity sensor. In normal use the cell may become dirty or coated and require cleaning. If the display is showing “.00” when the cell cup is dry, the sensor is probably clean. However, when testing high purity water in resistivity (“RES”) mode improved accuracy may be desired. No matter what a manufacturer claims, a sensor can and will become contaminated or coated and, therefore, require cleaning.
2. Press to display the stored memory records. 3. Press repeatedly until you pass the CELL ch location. The display will show “Auto oFF” (see Figure 24). 4. Press to initiate. “CAL” CAL will be displayed along with “15 SEC” or current Auto oFF value (see Figure 25). 5. Press or to change the amount of time (see Figure 26). Maximum time is shown. 6. Press Figure 25 CAL to accept the change (new time). Figure 26 XV.
4. Verify/Set the calibration linc. (See below – Setting “User” Mode Calibration “Linc”.) B. Setting “User” mode Calibration “Linc” The Linc function sets or “links” the calibration gain factor of a Standard Solution to the User solution mode. Once set, the “Linc” will stay intact with future calibrations unless the Linc has been canceled. For more information on canceling the “User” mode Calibration Linc refer to the section “Canceling “User” mode Calibration “Linc””, pg. 29.
6. Press key to accept the setting. Pressing any of the measurement keys will exit without changing the setting. “User” mode “Linc” is now complete. The “User” mode will now use the calibration gain constant used for the calibration of the Standard Solution as outlined above. C. Canceling “User” Mode Calibration “Linc” The Ultrameter II must be in “User” linked mode in order to cancel the “Linc” (ref. SOLUTION SELECTION, pg. 11). 1. Press “Linked” measurement key , or .
XVI. bluDock™ Wireless Data Transfer INSTRUCTIONS NOTE: Bluetooth® is a registered trademark of Bluetooth SIG. The bluDock Bluetooth module is a registered Bluetooth device. Requires Myron L bluDock™ accessory package, Model # BLUDOCK. Package includes Ultrameter II hardware modification that allows the unit to communicate wirelessly with a personal computer configured for wireless device communication.
NOTE: “PC Ini” may momentarily be displayed while initializing (see Figure 32). 4. Add bluDock to your Bluetooth devices per your operating system procedure. The bluDock device passkey is 1234. Figure 32 5. After pairing, note the number of the COM port assigned by the computer. In Windows XP, note the number of the outgoing COM port assigned by the computer. NOTE: The unit will automatically power down after 60 sec. If the unit powers down during pairing, repeat steps 1-3 above and continue. 1. 2. 3. C.
XVII. CARE and MAINTENANCE Ultrameter IIs should be rinsed with clean water after use. Solvents should be avoided. Shock damage from a fall may cause instrument failure. A. Temperature Extremes Solutions in excess of 71°C/160°F should not be placed in the cell cup area; this may cause damage. The pH sensor may fracture if the Ultrameter II temperature is allowed to go below 0°C/32°F. Care should be exercised not to exceed rated operating temperature.
allowed to dry out. However, if this occurs, the sensor may sometimes be rejuvenated by first cleaning the sensor well with Isopropyl alcohol or a liquid spray cleaner such as Windex™ or Fantastic™ and rinsing well. Do not scrub or wipe the pH/ORP sensor. Then use one of the following methods: 1. or 2.
XVIII. TROUBLESHOOTING CHART Symptom Possible Cause Inaccurate pH readings (6Psi) 1. pH calibration needed. Ref. pH Cal., pg. 17. 2. Cross-contamination from residual pH buffers or samples in sensor well. 3. Calibration with expired pH buffers. No display, even though measurement key pressed Battery weak or not connected. No response to pH changes Sensor bulb is cracked or an (6Psi) electromechanical short caused by an internal crack. Will not adjust down to pH 7 pH/ORP sensor has lost KCl.
Corrective Action Check connections or replace battery. Ref. Battery Replacement, pg. 32. 1. Recalibrate instrument. 2. Thoroughly rinse sensor well. 3. Recalibrate using fresh buffers. Ref. pH Buffer Solutions, pg. 36. Replace pH/ORP sensor. Ref. Replacement pH/ORP Sensor, pg. 37. Clean and rejuvenate sensor (ref. Cleaning Sensors, pg. 32) and recalibrate. If no improvement, replace pH/ORP sensor (ref. Replacement pH/ORP Sensor, pg. 37). Clean and rejuvenate sensor (ref. Cleaning Sensors, pg.
XIX. ACCESSORIES A. Conductivity/TDS Standard Solutions Your Ultrameter II has been factory calibrated with the appropriate Myron L Company NIST traceable KCl, NaCl, and our own 442™ standard solutions. Most Myron L conductivity standard solution bottles show three values referenced at 25°C: Conductivity in microsiemens/ micromhos, the ppm/TDS equivalents (based on our 442 Natural Water™) and NaCl standards. All standards are within ±1.0% of reference solutions. Available in 2 oz.
Two colors to choose from; Blue - Model #: UCC Desert Tan - Model #: UCCDT E. Hard Protective Carry Cases Large case with 2 oz. bottles of calibration standard solutions (KCl-7000, 442-3000, 4, 7, & 10 pH buffers and pH storage solution). Model #: PKUU Small case (no calibration standard solutions) - Model #: UPP F. Replacement pH/ORP Sensor (6Psi) pH/ORP sensor is gel filled and features a unique porous liquid junction. It is user-replaceable and comes with easy to follow instructions. Model #: RPR G.
varies with concentration and temperature in a non-linear fashion. Other solutions have more variation still. The Ultrameter II uses corrections that change with concentration and temperature instead of single average values. See Chart 1. 2.500% 2.400% 2.300% 2.200% 2.100% % / °C 2.000% 1.900% 1.800% KCl % / °C 1.700% 1.600% 1.500% Temperature 0 5 10 15 20 25 30 Chart 1 35 40 45 50 55 60 C.
D. A Chart of Comparative Error In the range of 1000 µS, the error using KCl on a solution that should be compensated as NaCl or as 442, is illustrated in the graph below. 7% 442 error with KCl tempco 6% NaCl error with KCl tempco 5% 4% 3% 2% 1% 0% (1)% (2)% Temperature 0 5 10 15 20 25 30 35 40 45 50 55 Chart 2 Users wanting to measure natural water based solutions to 1% would have to alter the internal compensation to the more suitable preloaded “442” values or stay close to 25°C.
number to indicate a certain setpoint or minimum concentration or trend. The Ultrameter II gives the user the capability to collect data in “KCl conductivity units” to compare to older published data, in terms of NaCl or 442, or as appropriate. The Ultrameter II can be used to reconcile data taken with other compensation assumptions, especially with its ability to allow custom characteristics through the “User” mode. XXI.
readings for a specific solution. That value remains a constant for all measurements and should be reset for different dilutions or temperatures. C. When does it make a lot of difference? First, the accuracy of temperature compensation to 25°C determines the accuracy of any TDS conversion. Assume we have industrial process water to be pretreated by RO. Assume it is 45°C and reads 1500 µS uncompensated. 1.
over this change of 10°C. The solution is then said to have a tempco of 2.2 %/°C. Tempco always varies among solutions because it is dependent on their individual ionization activity, temperature and concentration. This is why the Ultrameter II features mathematically generated models for known salt characteristics that also vary with concentration and temperature. B.
XXIII. pH and ORP (6Psi) A. pH (6Psi) 1. pH as an Indicator (6Psi) pH is the measurement of Acidity or Alkalinity of an aqueous solution. It is also stated as the Hydrogen Ion activity of a solution. pH measures the effective, not the total, acidity of a solution. 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.
The problem is, on the other side of the membrane is an unknown test solution, not potassium chloride. The outside electrode, also called the Reference Junction, is of the same construction with a porous plug in place of a glass barrier to Glass surface allow the junction fluid to contact Junction H+ ions the test solution without significant Plug migration of liquids through the plug material. Figure 33 shows a typical 2 component pair.
c. Temperature Compensation pH sensor glass changes its sensitivity slightly with temperature, so the further from pH 7 one is, the more effect will be seen. A pH of 11 at 40°C would be off by 0.2 units. The Ultrameter II 6Psi senses the sensor well temperature and compensates the reading. B. ORP/Oxidation-Reduction Potential/REDOX (6Psi) 1. ORP as an Indicator (6Psi) ORP is the measurement of the ratio of oxidizing activity to reducing activity in a solution.
glass sleeve can be broken. A surface film will slow the response time and diminish sensitivity. It can be cleaned off with detergent or acid, as with the pH glass. XXIV. SOFTWARE VERSION Contact the Myron L Company to see if a software upgrade is available. 1. Press key. 2. Press key until three numbers are displayed as shown in Figure 35. 3. Press key, instrument will time out in ~15 seconds.
XXV. GLOSSARY Anions Negatively charged ions. See Solution Characteristics, pg. 40. Algorithm A procedure for solving a mathematical problem. See Temperature Compensation (Tempco) and TDS Derivation, pg. 41. Logarithm An arithmetic function. See pH Units, pg. 43. ORP Oxidation-Reduction Potential or REDOX, See ORP/ Oxidation-Reduction Potential/REDOX, pg. 45. TDS Total Dissolved Solids or the Total Conductive Ions in a solution.
XXVI. ADDENDUM: New ORP ppm Free Chlorine Feature For 6Psi ONLY Software V.3.51 and later (see pg. 46). Contact the Myron L Company for more information: www.myronl.com A convenient new feature has been added to the Ultrameter II 6Psi™ that allows the user to choose between ORP millivolts (mV) and parts per million (ppm) free chlorine readings. mV and ppm free chlorine are the two most commonly used sanitizer measurement units used in water quality management.
NOTE: FOR COMPLETE INSTRUCTIONS ON MEASURING ORP, REFER TO MEASURING ORP, PG. 10, IN THE OPERATION MANUAL. To change the ORP measurement format preference: 1. Press . 2. Press and hold for approximately three seconds. The current preference for ORP units of measure is displayed. Factory setting for this preference is mV. (Shown below in Figure 36.) mV Figure 36 4. Press the or keys to toggle between mV and ppm free chlorine measurement format.
XXVII. ADDENDUM: NEW LSI & HARDNESS CALCULATOR (6Psi only) The new LSI calculator makes it easy to analyze the scaling nature of water in the lab or in the field. Using a calcium carbonate saturation index algorithm developed by Dr. Wilfred Langelier in 1936, the calculator computes the saturation index of a sample based on measured and inferred values for pH, temperature, hardness and alkalinity.
A. LSI Calculator Mode 1. Press any parameter key to turn the instrument on. 2. To access the LSI calculator, press repeatedly or hold down Figure 38 (fast scroll) until “CALC LSI” is displayed (see Figure 38). 3. Press . “FILL LSI” will display (see Figure 39). 4. Rinse both the pH/ORP sensor well and the conductivity cell cup three times with sample solution. 5. Fill both the sensor well and cell cup with sample solution and press 6.
9. The temperature value measured by the 6Psi and “°C” or “°F” will display (see example in Figure 43). Press 10. . The 6Psi generated LSI value will display (see example in Figure 44). °C Figure 43 To store this LSI value in memory, press . If you do not wish to change any of the variable values, exit the LSI calculator by pressing any parameter key or by letting the unit time out. Figure 44 B.
Press to accept the value displayed. The 6Psi inferred value for hardness and “Hrd” will display (see example in Figure 47). 4. Press the or Figure 47 keys to adjust the displayed value to the desired value. Press to accept the value displayed. The pH value measured by the 6Psi and “PH” will display (see example in Figure 48). 5. Press the or keys to adjust the displayed value to the desired value. Press Figure 48 to accept the value displayed.
C. Hardness Unit Preference Selection The LSI Calculator allows you to select either ppm or grains of hardness units for saturation index calculation. The hardness unit conversion is based on the following equivalency: 17.1 ppm (mg/L) = 1 grain The hardness range is limited to 0.0 - 1710 ppm and 0.0 - 100 grains of hardness in the 6Psi. NOTE: The 6Psi MUST be in the hardness screen (Hrd) in LSI Calculator mode or LSI Calculator “User” mode for hardness unit preference selection.
Myron L COMPANY 2450 Impala Drive Carlsbad, CA 92010-7226 USA Tel: +1-760-438-2021 Fax: +1-760-931-9189 E-Mail: info@myronl.com techquestions@myronl.com www.myronl.
