Electrical resistance measuring instrument 6600A

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The Measurements International 6600A is a low cost Dual Source High Resistance Meter using the preferred ‘Dual Source’ method for measuring high resistance in the range of 100kΩ to 10PΩ. The simplified construction and operation of the Measurements International 6600A offers much improved operation and performance over the typical teraohmmeter/electrometer, with a more user friendly approach to high resistance measurements. The 6600A has numerous advantages over single input devices like the typical teraohmmeter/electrometer such as reliability, trace ability and the fact that measurements are not dependent on short term stability or repeatability of the measurement circuit. Technology Since the mid 1990’s the modified Wheatstone bridge or Dual Source resistance bridge has set the standard for high precision measurement of resistances from 109 to 1014. Over the years, this technology has been further developed to the point that it has replaced all other technologies by utilizing a true “Bridge” measurement circuit, the Unit Under Test (UUT) is compared to a working or primary standard to produce a “Live Ratio”. The 6600A and 6650A are the only “bridges” commercially available for high resistance measurements. Any value resistor up to and including the 1016Ω level can be measured at ratios up to 100:1. Menu driven functions are selectable using the menu displayed for calibration, ratio measurements and absolute measurements. For the absolute measurements the value and related uncertainty of the reference resistor are entered.