Ultrameter™ Operation Manual Model 3P MYRON L COMPANY 10 - 02 (WEB) EG
Instrument Illustration Teflon* Reference Junction** under Glass pH Bulb pH/ORP Sensor (Replaceable) pH Glass Electrode ORP Electrode pH/ORP Sensor Protective Cap Displayed here: • Temperature readout • Memory Storage/ Recall • pH Calibration LOBATT CAL MEMORY Units of Measurement Parameter None pH mV - millivolts ORP % / °C mV BUFFER ORP pH Parameters (2) These 2 Measurement keys will: • Turn instrument on • Measure parameter • Exit any function ORP 3P CAL MCLR This key for: • Calibration •
FEATURES and SPECIFICATIONS • • • • • • A. Features Accuracy of ±.01 pH/±1 mV @ calibration point. All electrodes are internal for maximum protection. Waterproof to 3 feet/1 meter. Prompts for easy pH calibration. Memory saves 20 readings. Factory calibrations stored in microprocessor. B. General Specifications Display Dimensions (LxWxH) Weight Case Material pH/ORP Sensor Well Capacity Power Battery Life Operating/Storage Temperature Protection Ratings 4 Digit LCD 7.7x2.7x2.5 in. 196x68x64 mm 13oz.
TABLE OF CONTENTS VII. CHANGING from CENTIGRADE to FAHRENHEIT . . . . . . . . . . . .14 Instrument Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 VIII. TOTAL RETURN to FACTORY SETTINGS . . . . . . . . . . . . . . . . . 14 IX. CALIBRATION INTERVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 A. Suggested Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . .15 B. Calibration Tracking Records . . . . . . . . . . . . . . .
I. INTRODUCTION Thank you for selecting the Ultrameter™ Model 3P, one of the Myron L Company’s latest in a new line of instruments utilizing advanced microprocessor-based circuitry. This circuitry makes it extremely accurate and very easy to use (see pages 2 & 3 for Features and Specifications on this and other models). For your convenience, on the bottom side of your Ultrameter is a brief set of instructions, and a pocket sized card with abbreviated instructions is included with the instrument. a.
2. Rinse sensor well 3 times with sample to be measured. Shake out each sample to remove any residual liquid. 3. Refill sensor well with sample. 4. Press 5. Take reading. 6. IMPORTANT : After use, fill pH/ORP sensor well with Myron L Storage Solution, a strong KCl solution or pH 4 buffer, and replace protective cap. Do not allow pH/ORP sensor to dry out. 2. CALIBRATION A. Calibration Intervals Generally, calibration with pH solutions should be checked twice a month.
C. Calibration Procedures 1. pH Calibration 6. Press CAL to accept the new value. The pH Zero Calibration is MCLR now complete. You may continue with pH Gain Calibration or exit by pressing either measurement key. Important: Always “zero” your Ultrameter with a pH 7 buffer solution before adjusting the gain with acid or base buffers, i.e., 4 and/or 10, etc. b. pH Gain Calibration a. pH Zero Calibration 1. Rinse sensor well 3 times with 7 buffer solution. 2.
Single point Gain Calibration is complete. You may continue for the 3rd point of Calibration (2nd Gain) or exit by pressing either 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. Again, match the display to the known buffer value as in step 2 and continue with the following steps. 7.
VII. CHANGING from CENTIGRADE to FAHRENHEIT 1. Press pH 2. Press 3. Press 3. . MR to display the stored memory records. MR repeatedly until you pass the memory “CL r ALL ” location”. The display will show a “C” or “F” (see Figures 6 & 7). Press MR repeatedly until you pass the CLr ALL and the C-F locations. The display will show a “FAC SEL ” (see Figure 8). CAL 4. Press IX. CALIBRATION INTERVALS MCLR to accept the resetting.
X. CARE and MAINTENANCE Ultrameters should be rinsed with clean water after use. Solvents should be avoided. Shock damage from a fall may cause instrument failure. 2. Pour DI water in the sensor well and allow to stand for no more than 4 hours (longer can deplete the reference solution and damage the glass bulb). Retest. If neither method is successful, sensor must be replaced. A. Temperature Extremes Solutions in excess of 160°F/71°C should not be placed in the cell cup area; this may cause damage.
Possible Cause TROUBLESHOOTING CHART Symptom Battery weak or not connected. XI. No display, even though measurement key pressed ACCESSORIES A. pH Buffer Solutions pH buffers are available in pH values of 4, 7 and 10. Myron L Company buffer solutions are traceable to NIST certified pH references and are color-coded for instant identification. They are also mold inhibited and accurate to within ±0.01 pH units @ 25°C. Order 4, 7 or 10 Buffer. B.
In a solution of one known component, pH will indicate concentration indirectly. However, very dilute solutions may be very slow reading, just because the very few ions take time to accumulate. 2. pH Units The acidity or alkalinity of a solution is a measurement of the relative availabilities of hydrogen (H +) and hydroxide (OH - ) ions. An increase in (H +) ions will increase acidity, while an increase in (OH - ) ions will increase alkalinity.
Like acidity and alkalinity, the increase of one is at the expense of the other, so a single voltage is called the Oxidation-Reduction Potential, with a positive voltage showing a solution wants to steal electrons (oxidizing agent). Chlorinated water will show a positive ORP value, for instance. XIV. GLOSSARY Logarithm - An arithmetic function. pH Units, pg. 20. ORP Oxidation-Reduction Potential or REDOX, See ORP/ Oxidation-Reduction Potential/REDOX, pg. 21. - 2.
