The measurement range of an analyzer is determined by the hardware components and limitations such as the range of insulation, measurement voltage and frequency it operates at. In each range, different combinations of voltage and frequency are required for optimal measurement.
Simplified: at an ohmic resistance lower than 5 ohms, transition resistances in the electronics of the analyzer affect the accuracy. At a higher resistance than 1Mohm, insulation plays a vital role in the measurement accuracy. That means there are limitations for the input range of the hardware. In table 1, an overview is given of the different analyzers and their input ranges.
Table 1. Input ranges of Yokogawa analyzers
For detailed information please check our Technical Information: Contacting Conductivity sensor selection guide.
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