The power analyzer usually provides a wide measurement range, and each measurement range is customized to improve the accuracy within its specific range. In order to select the distance, the automatic ranging algorithm is generally used. However, switching between different ranges is not instantaneous and will lead to measurement gaps. In order to meet the needs of dynamic load analysis, DEWETRON has launched an innovative SUB-XV module, which can realize gapless measurement across multiple measurement ranges.
However, before exploring this exciting technology, let's take a closer look at the significance of measurement ranges and current technologies.
What is the measurement range?
It refers to the range of values that can be accurately measured by the measuring instrument. The measuring range is usually specified by the instrument manufacturer and is an important consideration when selecting the appropriate instrument for a particular application. It defines the value that the instrument can detect within its specified precision range. For example, a voltmeter with a range of 0-10 volts can accurately measure the voltage within that range. Any reading outside this range will result in inaccurate measurement or wrong instrument display.
Why is it important to choose the correct measuring range?
Choosing the correct measurement range is crucial to ensure the accuracy and reliability of measurement. Ensure that the instrument can accurately measure the required quantity within its capability. If the range is too wide, the instrument may lack the accuracy necessary for accurate readings. Conversely, if the range is too narrow, it may not capture the full range of the signal, resulting in defective readings. In addition, the selected measurement range affects the resolution of the instrument. A narrow range usually provides a high resolution, so that small changes in the measurement can be detected. This is essential for accurate measurement of subtle changes in the signal.
Current technical level
Today's power analyzers usually provide a wide range of measurements. Each is tailored within its specific range to improve accuracy and resolution. Generally, the automatic ranging algorithm is used to automatically select the range of the current measurement value. However, this presents a challenge because switching between ranges is not instantaneous. This switching process requires several 10ms, resulting in data gaps during measurement. Therefore, this method is suitable for quasi-static testing.
In order to meet the requirements of today's dynamic load analysis, an alternative method is needed. Several years ago, DEWETRON introduced such a method: single range input. This method relies on using a single wide measurement range. Therefore, the measurement gap is eliminated and the continuous measurement in a large range is promoted. However, this method also has its limitations. In a narrow range, in order to obtain high resolution, the input signal is severely limited. If it exceeds this range, it will be clipped. On the other hand, in a large range, the instrument may lack the accuracy required to accurately read small input signals. As we have seen, neither of these methods is completely satisfactory.
Solution: DEWETRON seamless automatic range technology
DEWETRON's "seamless automatic range" technology solves these problems. The result is a multi range input without multiplexing or physical switches. This means that it combines the advantages of the classic multi range method and the single range method.
According to the input type, each input channel can simultaneously obtain the measurement data of two to four physical measurement ranges. This means that each physical input generates up to four data streams, one for each range. These data streams are then combined by fading the sampled data of the active channel from one range to the next. All of this is accomplished in the onboard DSP at a very high sampling speed. In addition, this technology automatically compensates for any DC offset in a higher range, surpassing the automatic zeroing function applied in the traditional range switching process. In general, this technology can perform gapless voltage measurement in the input range of 1 to 1000 V.
With the increase of technical challenges and the demand for adaptability to new applications, the SUB-XV module and its seamless automatic range technology are perfect solutions. It combines the advantages of the original automatic ranging method and seamless continuous measurement, and ensures the flexibility of changing requirements. Especially suitable for switching load and voltage as well as open and short circuit tests. Therefore, DEWETRON overcomes the limitations of the two mainstream methods and provides seamless automatic range technology. Integrated into the SUB-XV module, this innovation enables uninterrupted voltage measurement across multiple ranges. By combining the advantages of traditional multi range analysis and single range method, it can ensure gapless signal acquisition without sacrificing resolution. Measuring range from 1 to 1000V DEWETRON Provides unmatched accuracy and reliability.
