Care and Maintenance
TweetQ. How do I send in an item for repair? You may contact the Myron L Company repair department to request an RMA at 760-438-2021 (ask for the repair department).You may also email at email@example.com. Once you receive your RMA, please ship using a trackable method to:RMA# (your number here) Repair DepartmentMyron L Company2450 […]
Q. How do I send in an item for repair?
You may contact the Myron L Company repair department to request an RMA at 760-438-2021 (ask for the repair department).You may also email at firstname.lastname@example.org. Once you receive your RMA, please ship using a trackable method to:RMA# (your number here)
Repair DepartmentMyron L Company2450 Impala DriveCarlsbad, CA 92010
Once received, your meter will be diagnosed and you will be contacted with an estimate. Please allow several weeks for a repair to be completed. There is a $35 minimum for out-of-warranty repair.
Please include the following information with your repair:
Product Model #
Product Serial # (located on the back label)
Description of repair issue
Business Address (full address)
Q. I need help calibrating my Ultrameter 6P.
Please see our YouTube video playlist here for instructions on 6P calibration: https://www.youtube.com/playlist?list=PLPPVD5SWUO-zr1T-41pNsEWxKDl6gpBMP
Q. I would like to know who is the contact in Brazil so my company can order an Ultrameter II – 6 PII? I couldn’t find a way to buy it online.
While we do not have a distributor in Brazil, international customers can order directly from our website here: http://www.myronlmeters.com/ Choose your product, click the Add to Cart and checkout buttons, then click the blue INTERNATIONAL button and follow the instructions. Your total will be given in local currency and you will also receive an estimated delivery time.
Tweet All Myron L meters are factory calibrated with NIST traceable Standard Solutions having specific conductivity/ppm values. Myron L solutions are made under strictly controlled conditions using reagent grade salts. These salts are […]
All Myron L meters are factory calibrated with NIST traceable Standard Solutions having specific conductivity/ppm values. Myron L solutions are made under strictly controlled conditions using reagent grade salts. These salts are mixed with deionized water having a resistivity of at least 5 megohms-cm purity.
Myron L solutions have an accuracy of ±1% based on values published in the International Critical Tables and traceable to the National Institute of Standards and Technology.
Myron L conductivity Standard Solutions and pH Buffers listed below are used for factory calibration. Regular use of these solutions is recommended to ensure specified instrument accuracy. Frequency of conductivity recalibration depends upon use, but once every month should be sufficient for an instrument used daily. pH models, depending upon use, should be recalibrated with pH 7 Buffer every 1-2 weeks, and checked with pH 4 and/or 10 Buffers at similar intervals. pH Sensor Storage Solution is recommended for keeping the pH sensor wet. Myron L solutions are available in quart/1 ltr., gallon/3,8 ltr. and 2 oz./59 ml plastic bottles, ready to use.
Note: Refer to TDS/Conductivity Equivalents chart for actual calibration point values.
Note: RE-10 Range Extenders are usually calibrated with either 442-15,000 or 442- 30,000 Standard Solution.
Conductivity instruments are a convenient way to determine the parts per million of total dissolved solids (ppm/TDS) in boilers, cooling towers, reverse osmosis systems, etc. Although the International Unit (Sl) of measuring conductivity is the microsiemens/ cm (also known as micromhos/cm), a direct reading in ppm/TDS is sometimes preferred.
Myron L® conductivity instruments and monitor/ controllers are calibrated to read in ppm/442, ppm/ NaCI, or microsiemens. All three values are listed on our Standard Solutions. The relationship among these standards can be seen in the table and graphs that follow.
442 Natural Water™ Standard Solution is used in calibrating many Myron L® Instruments. It is the best choice when measuring boiler and cooling water samples, city water supply, lakes, wells, etc. “442” refers to the combination of salts mixed with deionized water to comprise this standard: 40% sodium sulfate, 40% sodium bicarbonate, 20% sodium chloride. A combination of standard salts is necessary since natural water salt type and concentration can vary greatly by location. After much research, the 442 Standard was developed by the Myron L® Company more than 40 years ago. It remains the world’s most accepted standard.
NaCl Standard Solution is offered to calibrate instruments that measure any sample that is predominately NaCI (sodium chloride), such as sea water, brackish water, etc. As can be seen in the graph at right, 1000 ppm of NaCI has a conductivity of 2000 micromhos. Note how this 1:2 relationship is continuously variable throughout the curve and decreases as ppm NaCI increases.
KCl Standard Solution is used to calibrate conductivity instruments that read directly in microsiemens (micromhos) or millisiemens (1000 microsiemens). KCI (potassium chloride) is a very stable salt and is an international calibration standard for conductivity measurement.
pH Buffer Solutions 4, 7 and 10 are mold inhibited and accurate to within + 0.01 pH units @ 25°C. Myron L Buffers are traceable to NIST certified pH references and are color-coded for instant identification.
You can find your Myron L solutions here: http://www.myronlmeters.com/Myron-L-Calibration-Solutions-s/45.htm
The table below shows the Conductivity/TDS Equivalents for various Myron L Standard Solutions.
TweetHow to maximize the life of your Myron L meter’s pH or pH/ORP sensor Your meter uses a general-purpose glass pH sensor. This glass sensor may be used in most applications. To ensure maximum life of your pH meter, read the following procedures. It is the experience of the repair technicians that 90% of all […]
How to maximize the life of your Myron L meter’s pH or pH/ORP sensor
Your meter uses a general-purpose glass pH sensor. This glass sensor may be used in most applications.
To ensure maximum life of your pH meter, read the following procedures. It is the experience of the repair technicians that 90% of all premature pH sensor failures can be prevented with a few maintenance procedures.
The following procedures should be performed after using your meter, or if you plan to store your meter for an extended period of time.
1. The pH sensor well (fig 1) must be filled with storage solution (preferred) or pH buffer 4, or tap water with table salt added and its protective cap (with foam insert) firmly installed.
Failure to do so will:
• Allow the glass membrane to dry out. A dehydrated glass membrane will not produce the necessary “Gel layer” on the sensor surface, which is essential to allow the exchange of hydrogen ions (measure pH).
• Allow airborne contaminants to settle on the glass membrane surface. Once contaminants dry onto the surface of the glass membrane, it will inhibit the transfer of hydrogen ions. (See factory approved cleaning process below.)
• Allow the reference junction to dry out. The reference junction material is usually a wick or fiber type material that completes the electrical circuit between the reference electrode cell and the solution being tested. Dehydration causes the reference solution to leach out of the electrode cavity, and form crystals in the junction. This is normally referred to as the “Bridging effect”.
Repeated dehydration of the pH or pH/ORP sensor will cause the instrument to have a slower response time, and be more difficult to calibrate. Dehydration will significantly reduce the normal service life of the sensor.
2. Store spare pH or pH/ORP sensors in a refrigerator. “Do not Freeze”. Take proper precautions not to allow the temperature to fall below freezing. This will cause the solution to expand and may damage the electrodes inside the sensor. Storage in a refrigerated environment will slow the evaporation of the storage solution, but not prevent evaporation. Always inspect and replace storage solution in spare sensor well on a regular basis.
Note: When using storage solution, it is common for white crystal formations to form around the seal of the pH sensor well and protective cap; this is a normal occurrence as the solution evaporates. Never store the sensor in high purity water (distilled or de-ionized).
Approved factory cleaning process for the pH sensor
During the normal use of your Myron L meter, you must clean your pH sensor bulb. The cleaning is necessary to eliminate the deposits of organic or inorganic contaminates left on the sensor from the solutions being tested. If you think your meter is inaccurate, or the display value drifts, or the response is slow and sluggish, perform the following tests.
Rinse the sensor well (three times) and fill with pH buffer 4 solution. If the pH continues to drift below the pH 4 level (i.e. 3, 2, or 1) repeat the test using buffer 10. If the pH level drifts beyond the pH level of 10 (i.e. 11, 12 etc.) the cleaning procedure outlined below may increase the performance and accuracy of your meter.
While performing the above tests, if the pH levels of the buffer solutions 4 and 10 actually drift towards pH 7, this is an indication that the pH sensor is damaged and needs to be replaced.
Caution: Wear proper eye protection and gloves during the following cleaning procedures.
Try the following to clean and recover the pH or pH/ORP sensors.
NOTE: Not all pH or pH/ORP sensors can be recovered.
1. Fill the pH/ORP sensor well with 100% Isopropyl alcohol. If not available use additive- free rubbing alcohol (70%). This will remove any oils.
2. Allow the sensor to soak for 10 minutes.
3. Rinse with RO or DI water.
4. Rinse the sensor well (three times) and fill
with storage or pH buffer 4 solution. Replace the protective cap and allow the sensor to recover overnight.
5. Re-calibrate the instrument according to the operations manual. If the instrument fails to calibrate properly, continue to the next step.
If the above procedure does not recover the pH sensor function, perform the following:
1. Fill the pH or pH/ORP sensor well with a hot salt solution 60°C (140°F) potassium chloride (KCI preferred) or hot tap water with table salt (NaCl). Allow the solution to cool.
2. Re-calibrate the instrument according to the operations manual. If the meter doesn’t calibrate properly, the pH or pH/ORP sensor must be replaced.
*CAUTION: If you do not use your Myron L meter on a regular basis, the storage solution in the pH or pH/ORP sensor well will evaporate over time and must be replenished. To prevent premature pH glass sensor failure, we suggest a preventative maintenance program. Failure to do so could void the factory warranty. The use of liquids containing high levels of solvents, such as acetone, xylene, and chlorinated hydrocarbons, or other harsh chemicals in your Myron L meter is not recommended.
Replacement pH sensor for Ultrameter II & Digital Dialysate Meters
Replacement pH sensor for Portable Analog pH Meters
Replacement pH sensor for Techpro II meters
Replacement pH Sensor PT2: RPT2
pH/ORP Sensor Storage Solutions: 32 oz
pH 4 Buffer: 32 oz
Video: Ultrameter II 6P pH Sensor (RPR) Replacement – MyronLMeters.com
Tweet Protect Your Ultrameter With Regular Maintenance When you spend a thousand bucks for a meter, you want it to last. That’s why you bought a Myron L meter in the first place. And, while Myron L meters are renowned for durability, they need care: cleaning, calibration, storage solution, sensor replacement, and sometimes repair. Keep […]