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Manganin is a trademarked name for an alloy of typically 84.2% copper, 12.1% manganese, and 3.7% nickel. It was first developed by Edward Weston in 1892, improving upon his Constantan (1887). Manganin foil and wire is used in the manufacture of resistors , particularly ammeter shunts , because of its virtually zero temperature coefficient of ...
A resistance decade box or resistor substitution box is a unit containing resistors of many values, with one or more mechanical switches which allow any one of various discrete resistances offered by the box to be dialed in. Usually the resistance is accurate to high precision, ranging from laboratory/calibration grade accuracy of 20 parts per ...
Very importantly, constantan can be processed for self-temperature compensation to match a wide range of test material coefficients of thermal expansion.A-alloy is supplied in self-temperature-compensation (S-T-C) numbers 00, 03, 05, 06, 09, 13, 15, 18, 30, 40, and 50, for use on test materials with corresponding thermal expansion coefficients, expressed in parts per million by length (or μm ...
For manganin, a common shunt material, at 80 °C thermal drift begins to occur, at 120 °C thermal drift is a significant problem where error, depending on the design of the shunt, can be several percent and at 140 °C the manganin alloy becomes permanently damaged due to annealing resulting in the resistance value drifting up or down.
Other constant-resistance alloys include manganin (Cu 86 Mn 12 Ni 2), Cupron (Cu 53 Ni 44 Mn 3) [2] and Evanohm. Melts at about 1,220 °C (2,230 °F). Melts at about 1,220 °C (2,230 °F). Balco ( Ni 70 Fe 30 ) and similar alloys have very high, but more linear, temperature coefficients of resistivity, making them suitable for sensing elements.
The invention of "Manganin," the alloy now used universally for resistors of high accuracy, followed shortly thereafter. The resistance of "Manganin" is virtually constant within reasonable temperature limits. 1888 The Weston Electrical Instrument Co. is formed by Edward Weston. Dr.
The invention of "Manganin," the alloy now used universally for resistors of high accuracy, followed shortly thereafter. The resistance of "Manganin" is virtually constant within reasonable temperature limits. 1888 The Weston Electrical Instrument Co. is formed by Edward Weston. Dr.
Manganin (manganese, nickel) ... ; high corrosion resistance, used in marine applications in ... oxygen); used in spectacle frames, precision screws, etc. Titanium ...