Tweet How much downtime can you afford? If you are managing an inline water filtration system such as a reverse osmosis system (RO) or a Deionized water system (DI), then you probably have instrumentation installed in order to monitor the water quality. You rely on the instruments to give accurate and reliable readings, […]
How much downtime can you afford?
If you are managing an inline water filtration system such as a reverse osmosis system (RO) or a Deionized water system (DI), then you probably have instrumentation installed in order to monitor the water quality. You rely on the instruments to give accurate and reliable readings, but what happens when the water quality measurements suddenly change? If, For example, the conductivity or TDS numbers are substantially higher or the resistivity reading drops to a low number over night.
There are a few things you can do to validate your filtration system and pinpoint the issue. Some RO and DI water systems have sample valves or ports after each filter, so you can draw a water sample and test it. If your water system is set up this way, lucky you! If not, you should consider installing a sample valve or port after each filter in order to test the water quality and performance of the filters.
If your water quality measurements suddenly change, the first thing you can do is use a reliable and accurate handheld instrument to test the water quality and compare the readings to your inline instrumentation. Conductivity or TDS measurements are a good indicator of changes in water quality Resistivity measurements are good for DI water systems. Draw a sample of water from your system as close as possible to the location of your inline sensor or probe. If the measurements from your handheld and your inline monitor match then you can begin to troubleshoot your RO or DI water system. If the readings don’t match, you need to troubleshoot your inline monitor to resolve the issue. Contact the supplier of your inline monitor and explain to them that you have verified the water quality of your system with an independent handheld instrument. From there you can diagnose the problem with the inline monitor.
Troubleshoot your RO and DI water filtration systems
To pinpoint the problem, test at various points throughout your water system. Take conductivity/TDS measurements and record the readings in a data log to identify trends in your water quality. This can help you to evaluate filter and system performance in the future. If you already have these readings, then troubleshooting should be quick and easy.You may be reading this right now because you need to troubleshoot and are not exactly sure where to begin or you don’t have measurement records. In that case, you’ll need to begin sampling the water to identify the issue with the water quality.
If you have previously recorded measurements logged…
Sample the water before and after each filter, compare the conductivity/TDS measurements to your previous measurements and see if there is a big difference. If so, you may have identified the problem. Continue to do this until you have checked each filter. Replace the ones that are out of performance specification.
If you DO NOT have previous recorded measurements logged…
Sample the water before and after each filter. Check with the filter manufacturer about the performance specification for each filter. They should be able to tell you the rejection rate, throughput, etc. From there you can determine if the filter is performing to spec based on the before/after measurements. Once you have identified which filter(s) is out of spec, you can begin replacing or changing them.
if you do not have a handheld instrument to validate your RO or DI water system, we recommend the Ultrameter II 6P. If you don’t need to test pH or ORP, then get the Ultrameter II 4P. These meters have been used to validate various water systems worldwide, and are renowned for their accuracy, reliability, and ease of use.
More information available at MyronLMeters.com
Tags: MyronLMeters.com, Myron L, Ultrameter, Myron L Ultrameter, reverse osmosis, deionized water, RO, DI, water filtration, filtration sytems, water systems
TweetConductivity is the ability of a material to transmit energy in the form of electricity or heat. In water quality terms, it indicates how much conductive material is in the water. The higher the conductivity measurement, the more conductive material is in the water. The standard unit of measure for conductivity is Siemens per meter […]
Conductivity is the ability of a material to transmit energy in the form of electricity or heat. In water quality terms, it indicates how much conductive material is in the water. The higher the conductivity measurement, the more conductive material is in the water.
The standard unit of measure for conductivity is Siemens per meter (S/m).
The siemens (symbol: S) is a unit of electric conductance and electric admittance. Conductance and admittance are the reciprocals of resistance and impedance respectively, hence one siemens is equal to the reciprocal of one ohm, and is sometimes referred to as the mho. It is named after the German inventor and industrialist Ernst Werner von Siemens. In English, the term siemens is used both for the singular and plural.
When testing water quality for conductivity measurements, you will hear terms like microsiemens, micromhos, millisiemens, and millimhos.
-Microsiemens (uS) is the same as the micromhos (umhos).
-Millisiemens (mS) is the same as millimhos (mmhos).
These units of measure operate the same way as metric distance measures. The meter is short and the kilometer is long, but they both measure distance. Microsiemens and millisiemens work the same way. 1 millisiemen is equal to 1000 microsiemens.
Different materials conduct electricity differently – this principle applies to dissolved materials, as well. If you have a tablespoon of sodium chloride (table salt) and dump it in a glass of pure water, then take another tablespoon of potassium chloride salts and dump it in another glass of pure water, the conductivity measurements from the two glasses will be different.
Some typical conductivity measurements of water:
Ultra pure water: 0.05 – 1.0 microsiemens
Drinking water: 200 – 500 microsiemens
Seawater: 30,000 – 50,000 microsiemens
It is important to use a conductivity meter that can test different salt types and properly compensate for temperature differences in order to get the most accurate conductivity measurements.
To learn about Conductivity vs. TDS, check out this blog post: http://blog.myronlmeters.com/archive/5
If you are setting up a new dialysis clinic, or just revising internal guidelines, this may help you to understand the full process, and become more familiar with water treatment in the dialysis clinic.
If you are setting up a new dialysis clinic, or just revising internal guidelines, this may help you to understand the full process, and become more familiar with water treatment in the dialysis clinic.
Check the incoming water source
Your clinic’s water source should be tested periodically to make sure that the level of chemical contamination meets AAMI (Association for the Advancement of Medical Instrumentation) standards. Send a sample of your water to a qualified lab that can analyze the samples according to AAMI standards. Since dialysis clinics are required to meet AAMI standards at all times, you should check the water about every quarter to ensure that you are meeting AAMI standards. Samples for product water chemical analysis should be drawn from a sample port immediately after the RO or DI system. You can then determine if your water filtration system is degrading, or if there are changes to the incoming source based on past analysis trends.
When and Where to Test the Water:
When collecting samples from your water treatment system, be sure to run the water from sample ports for at least one minute at normal pressure and flow rate before collecting the water sample. Do not disinfect the sample port – this could lead to false readings. If you must disinfect, use alcohol instead of bleach, and only take a sample once the alcohol has completely dried. Use a reliable, accurate, and simple instrument to measure samples. If you do not already have an instrument, you can find some here that are designed specifically for dialysis clinics:
Proper Testing Protocol
To properly test the system, take samples from the product water distribution pipes at the following locations:
Site 1: Take a sample at the point where the water leaves the RO machine, before it enters the holding tank (Indirect System), or before it goes to the treatment room to provide water for dialysis machines (Direct System).
Site 2: If an RO water holding tank is present, take the sample at the point where the water leaves the tank.
Site 3: Take one at the end of the return line of the RO water distribution loop, whether it is returning to the RO or a water holding tank. If a bacteria filter is installed anywhere in the system, take samples from sample ports both pre and post filter.
Site 4: Take one at the point where water enters into the dialyzer reprocessing system, whether it is a manual or automated system. (Note: If a sample port is not present, install one.)
Site 5: Take one at a point where water enters equipment used to prepare bicarbonate and acid concentrate. (Note: If a sample port is not present one should be installed.)
Site 6: Take another at the point where the dialysis machine is hooked up to the product water loop. If a dialysis machine is consistently attached to that location, you may culture the machine instead of the water outlet.
Site 7: If your facility uses softened, dechlorinated water as a backup source, you must perform cultures and a Limulus Amebocyte Lysate (LAL) test on this water, because the RO is the primary source of bacterial protection for the patients.
TweetWe are continually adding new videos to our video library. You can view them on our website at MyronLMeters.com or on our YouTube Channel. Please post your comments and suggestions for videos that you’d specifically like to see in the future. We will do our best to create videos to help you with things regarding […]
We are continually adding new videos to our video library. You can view them on our website at MyronLMeters.com or on our YouTube Channel. Please post your comments and suggestions for videos that you’d specifically like to see in the future. We will do our best to create videos to help you with things regarding the instrumentation.
Basic Tips For Choosing The Proper Instrument For Water Quality Tests
TweetIn order to test the swimming pool water quality, you need to know what you’re testing. Some of the basic parameters that are measured for pools include pH, Chlorine, Total Alkalinity, Calcium Hardness, and Total Dissolved Solids. A balanced swimming pool really only needs to have the pH and chlorine levels checked and corrected on […]
In order to test the swimming pool water quality, you need to know what you’re testing. Some of the basic parameters that are measured for pools include pH, Chlorine, Total Alkalinity, Calcium Hardness, and Total Dissolved Solids.
Many swimming pool and spa professionals use portable instruments to test the water quality during treatment. If you are a homeowner with a pool, you may want to consider using an instrument as opposed to the simple test kits with liquid droplets or tablets. If you need an instrument, check out the selection here: MyronLMeters.com. The instruments are much more accurate and can provide immediate, reliable results. If you are using the test kits, there are a few things to note. Expired tablets/ test liquids (reagents) should be thrown out as they very often give inaccurate readings, resulting in improper treatment, wasting expensive chemicals and possibly damaging the pool and filtration equipment. Always keep the test kit in a cool dry place out of the sun and out of the reach of children.
When testing the pool water, rinse the cell cups of your instrument or test kit thoroughly before filling them with water from at least 20-30 cm below the surface of the swimming pool. When you’re finished testing the water be sure not to pour the samples back into the pool.
As a general rule of thumb, tests for pH and chlorine should be done weekly. If there are no obvious problems in your swimming pool (algae growth, cloudy water, lime scale buildup, etc) then you can test for Total Alkalinity, Calcium Hardness, and Total Dissolved Solids approximately every month.
Swimming pool chemistry can seem intimidating, so consulting a swimming pool professional is not a bad idea. Some will visit your pool and perform the test or you can take a sample directly to your local pool supply store and they may be able to test it for you.
If the water in your area is free from any metals and your swimming pool shows none of the symptoms of iron or copper presence, the test for these metals is unnecessary. If, however, you notice staining on the walls and floor of the swimming pool, you should have the levels of these metals checked and treated if necessary.
For a more in-depth study of pool water testing, visit the link below:
The Association of Pool and Spa Professionals (APSP) is a great resource for individuals and companies that want to learn more about water treatment for pools and spas.
TweetWater quality is the physical, chemical and biological characteristics of water. It is a measure of the condition of water relative to the requirements of the application. It is most frequently used by reference to a set of standards against which compliance can be assessed. The most common standards used to assess water quality relate […]
Water quality is the physical, chemical and biological characteristics of water. It is a measure of the condition of water relative to the requirements of the application. It is most frequently used by reference to a set of standards against which compliance can be assessed. The most common standards used to assess water quality relate to drinking water, safety of human contact and for the health of ecosystems.
Water quality is a very complex subject, in part because water is a complex medium intrinsically tied to the ecology of the Earth. Industrial pollution is a major cause of water pollution, as well as runoff from agricultural areas, urban stormwater runoff and discharge of treated and untreated sewage (especially in developing countries).
The complexity of water quality as a subject is reflected in the many types of measurements of water quality indicators. The list below represents some of the simple measurements that can be made on-site in direct contact with the water source in question:
- Total Dissolved Solids (TDS)
- Oxidation Reduction Potential (ORP)
- Dissolved oxygen
More complex measurements that must be made in a lab setting require a water sample to be collected, preserved, and analyzed at another location. Making these complex measurements can be expensive. Because direct measurements of water quality can be expensive, ongoing monitoring programs are typically conducted by government agencies. However, there are local volunteer programs and resources available for some general assessment. Tools available to the general public can be found here.
TweetMeasuring the pH of pure DI water is easy when you know what to expect. In theory, pure water should have a pH of 7. When you actually measure the pH, it will most likely fall between 5.5 and 7 due to its absorption of CO2 from the atmosphere. This natural occurrence forms carbonic acid […]
Measuring the pH of pure DI water is easy when you know what to expect. In theory, pure water should have a pH of 7. When you actually measure the pH, it will most likely fall between 5.5 and 7 due to its absorption of CO2 from the atmosphere. This natural occurrence forms carbonic acid in the water, lowering the pH. Since DI water is pure, there is nothing to buffer it and stabilize the pH. Below are a few tips to increase the accuracy of your pH measurements.
Tips for accurate pH readings
- First and foremost, use a high quality ph meter and ensure that it is properly calibrated with pH buffer solution. Check the manufacturer’s recommendations for calibration. The Ultrameter II 6P and the Techpro II TPH1 are portable pH meters that are extremely accurate and easy to use.
- When using a portable pH meter, avoid cross-contamination by thoroughly rinsing with the DI water that you will be sampling. If a glass beaker or cup is to be used, rinse that as well.
- Use small samples and minimize exposure to air, as this will lower the pH value. Taking samples from an open-air drum or tank will typically give erroneous readings. Collect samples from a sample port if possible.
- If you have access to high-purity reagent grade KCl (Potassium Chloride) salts, then you can buffer the DI water to stabilize the pH. Adding a tiny amount to the pure DI water sample will increase the ionic strength and reduce the absorption of CO2 from the atmosphere. Be careful not to contaminate the KCl salts. Use proper tools/utensils to add the KCl salts
- If no salt is available and all you need is a quick check of your system, you can flow the water from a sample port into your portable pH meter to measure the pH values. This will take slightly longer to stabilize. Be sure to use an accurate, waterproof pH meter and hold it closely to the sample port.
- Changes in temperature can affect the pH. Use a pH meter that is temperature compensated to remedy this issue.
If you need pH buffer solution, you can find it here at an affordable price.
TweetThe need for proper dialysis water quality tests Kidney failure is a big problem in the U.S. and it is only growing. More than 350,000 Americans receive dialysis treatment through private clinics, independent centers, and hospitals, while 8% of U.S. dialysis patients treat themselves at home. As more and more Americans develop a need for […]
The need for proper dialysis water quality tests
Kidney failure is a big problem in the U.S. and it is only growing. More than 350,000 Americans receive dialysis treatment through private clinics, independent centers, and hospitals, while 8% of U.S. dialysis patients treat themselves at home.
As more and more Americans develop a need for dialysis treatment, water quality instrumentation manufacturers are looking for a way to help clinics improve their quality standards and efficiency.
Part of the problem
If you are constantly recalibrating your instruments, performing a decontamination process, or sending the meter in for repair, then you’re wasting time. As the number of dialysis patients increases, delays in the water quality testing add up. Today, you have options when it comes to testing dialysis water quality and dialysate composition.
Some instruments require annual calibration or an inconvenient decontamination process after each use. Using an instrument that requires direct contact with fluid means you have to decontaminate the meter before helping the next patient. If done incorrectly, the water treatment system and distribution piping can become contaminated, putting lives at risk.
More downtime occurs when dialysis meters have to be sent back to the manufacturer for annual calibration. If you are a clinician or biomedical equipment technician at a dialysis clinic, then you know how frustrating it is to work with problem instruments.
Make your job easier with the Digital Dialysate Meter™ D-6
MyronLMeters.com features the new Myron L Digital Dialysate Meter™ D-6.
Unlike other instruments, this meter does NOT have issues with holding calibration or giving consistently accurate readings. It does NOT have an inconvenient decontamination process or require any annual factory calibration. The meter does NOT use paper strips or reagents that expire or allow for subjective interpretation of results.
The D-6 simplifies testing in a variety of clinical applications: dialysate testing, water quality control, system disinfection, equipment calibration and effluent monitoring.
The D-6 tests both acetate and bicarbonate dialysate quality. It measures conductivity, pH and temperature to ensure proper mixing during dialysate preparation and as a final check of dialysate quality before hemodialysis treatment.
Order a bluDock™ Bluetooth Wireless Communication Package and your meter can communicate wirelessly with your computer to download your saved measurements. Say goodbye to clipboards, data entry, and human error.
Make your job easier now, order online and SAVE 10%.
Tweet If you are a greenhouse grower then you are most likely familiar with the importance of proper water quality for your crops. Water quality can easily be determined by taking measurements periodically. It is important to use accurate and reliable equipment to perform the measurements. A wide selection of high quality conductivity testers and […]
If you are a greenhouse grower then you are most likely familiar with the importance of proper water quality for your crops. Water quality can easily be determined by taking measurements periodically. It is important to use accurate and reliable equipment to perform the measurements. A wide selection of high quality conductivity testers and hydroponic pH testers can be found here at an affordable price.
To determine the suitability of water for irrigation you can easily take measurements of the Electrical Conductivity (EC) and the Sodium Adsorption Ratio (SAR). In general, the higher the EC and SAR, the less suitable the water is for irrigation. Irrigation using water with high sodium adsorption ratio may require soil amendments to prevent long-term damage to the soil.
SAR measurements are provided with laboratory analysis of the water. However, EC measurements can be made using a portable EC meter. The Myron L AG6/pH was specifically designed as a pH and conductivity tester for greenhouse crops.
As a rule of thumb, the water is considered borderline and its use can present problems if conductivity values are higher than 0.8 millisiemens/cm (mS) and SAR is over 4. If the conductivity measurement is below 0.8 mS and the SAR measurement is below 4, the water is suitable for greenhouse irrigation. Particular management practices should be used when water is outside the acceptable limits. This might include using a growing medium with excellent drainage, leaching with every watering and compensating the sodium with calcium and magnesium.
If galvanized steel is used throughout the greenhouse and water is reclaimed for irrigation, it is a good idea to check the amount of Zinc in the water and make nutrient correction accordingly.
Many greenhouses use drip irrigation systems, which are efficient and low maintenance, but nozzles can become clogged by hard water. Check for high levels of bicarbonates (above 100 ppm) in the water and neutralize with the appropriate acids.
There are many factors that affect water quality and greenhouse crop growth. Consult your fertilizer manufacturer for recommendations on proper nutrient levels.
TweetThe TDS to Conductivity correlation is non-linear and no single multiplier can determine the relationship. Therefore, a simple conversion table has been established to help you determine an approximate conversion factor. Different types of salt have a different conductance value. The table below shows the three standard salts types. To simplify this conversion, Myron L […]
The TDS to Conductivity correlation is non-linear and no single multiplier can determine the relationship. Therefore, a simple conversion table has been established to help you determine an approximate conversion factor.
Different types of salt have a different conductance value. The table below shows the three standard salts types. To simplify this conversion, Myron L has developed Conductivity/TDS meters that allow you to select the different salt types and does the conversion for you automatically. Take a look at the Ultrameter II 4P or the Techpro II TP1.
|Conductivity at 25 °C||TDS KCI||TDS NaCI||TDS 442|
|ppm Value||Factor||ppm Value||Factor||ppm Value||Factor|
TDS 442 – This solution best represents natural freshwater. The Myron L Company developed the 442 standard nearly 50 years ago. It is still the world’s most accepted standard.
TDS NACL – This sodium chloride solution best represents seawater, brackish water, or other high saline solution.
KCL TDS – This potassium chloride solution is a very stable salt and is an international calibration standard for conductivity measurements.
All of these different solution types are available here at an affordable price.