Best practice requires measuring impedance values over months and years, each time comparing them to previous values on record to create a base line. It’s important to remember that a single impedance measurement is of little value without context. By doing this the weak cells will stand out and indicate that further investigation is likely required. In those cases it is good idea to compare each cell against the other cells in the string. The first time you test a battery’s impedance it can be worrisome because there is no baseline with which to compare data and draw conclusions. Over time, a battery’s internal resistance, or impedance, typically increases indicating degradation in the cell. When measurements are taken over time, impedance values prove to be a useful trending tool signaling potential problems much earlier than voltage testing alone. By measuring impedance you can better understand the internal resistance of the battery, which provides a better picture of overall health. Along with this, remember to love your body and keep it fit. Go ahead and measure yourself and fill in the body shape calculator correctly to get the real picture. One of the best ways to measure a battery’s state-of-health is to measure battery impedance. This Body Shape Calculator will surely tell you your actual body shape. So what approach should you take to determine a battery’s state-of-health? Even when a battery has the correct voltage measurement it can still fail when a load is applied.
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Voltage won’t signal a battery’s degradation until late in the battery’s life which increases the chances for the entire battery string going offline in the event of a failure. Voltage is simply an indication of a battery’s state-of-charge, rather than a battery’s state-of-health. But measuring voltage alone won’t give you a complete picture. For Example: one foot equals 0.304 meters twelve inches make one foot three feet make a yard sixteen ounces make a pound (weight) two thousand eight hundred fifty-six cubic centimeters make a liter (volume). Many people think monitoring voltage, either through online voltage monitoring equipment or in-person voltage tests, is enough. The basic unit of measurements in feet, pounds, and inches, which can be converted into smaller or bigger units that are more complex. But how do you determine when or if your battery is going to fail? Although most batteries used in uninterruptable power supply (UPS) and battery back-up systems are touted as "maintenance free," they are still susceptible to deterioration from corrosion, internal shorts, sulphation, dry-out and seal failure.
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