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Description-
"RAI" DC Standard Resistor Model 55X-SR has been designed and fabricated to meet precision calibration requirements. These standard resistors can serve as Precision Resistance Calibration Standards in component manufacturing industries to compare the accuracy of manufactured components such as capacitors, resistors, potentiometers, and trim pots. They are also suitable for quality control and instrumentation laboratories for calibration of process control instruments, various types of thermocouples such as J, K, R, S & T, RTDs, and engineering laboratories for resistance simulation and instrument calibration.
The DC Standard Resistor Model 55X-SR is designed to provide highly stable and reliable resistance performance. These precision standards are suitable for applications where accurate standard resistance values and standard precision resistor values are required for calibration and resistance measurement.
To ensure stringent accuracy, high degree of stability, and utmost reliability, manganin wire and strips have been used to construct these standard resistors. These standards incorporate manganin coils that have been subjected to prolonged ageing and heat treatment to improve stability and reduce the temperature coefficient of the terminals.
The resistance element is sealed in an aluminum container having moisture-free oil. The use of oil improves the cooling effect, which in turn imparts greater stability to resistance. The unit provides reliable standard resistance performance for precision calibration and measurement applications.
For more accurate work, the recommended wattage dissipation is 10 milliwatts, but up to 1 watt may be dissipated without harm to the element.
Calibration of process control instruments.
Quality assurance and calibration laboratories.
Temperature controllers & indicators.
RTDs, Thermocouples, Strain gauges & thermostats.
Resistance simulation for calibration of panel meters and temperature gauges in the cockpit of aircraft.
Sensors & meters in the maintenance laboratories of aircraft test beds and aeronautical maintenance laboratories for instrumentation.
Calibration applications requiring stable and accurate standard resistance values.
Good engineering characteristics.
Four-terminal method employed for resistance measurement to compensate for lead resistance.
Resistance unaffected by variation in temperature due to very low temperature coefficient.
Exceptional accuracy coupled with excellent reliability.
Oil-immersed resistance to provide excellent cooling.
Resistance housed in a very strong and lightweight metal container.
Excellent reproducibility of resistance value.
Non-inductive winding to minimize inductance effect.
Suitable for applications requiring accurate standard precision resistor values and reliable standard resistance measurement.
A DC Standard Resistor is a precision resistance standard used for calibration, resistance measurement, resistance simulation, and comparison of measurement accuracy in laboratories and industrial applications.
DC Standard Resistors are used for calibrating process control instruments, temperature controllers, RTDs, thermocouples, panel meters, temperature gauges, and other precision measuring instruments.
The 55X-SR uses manganin resistance elements with prolonged ageing and heat treatment. Its four-terminal measurement method, low temperature coefficient, non-inductive winding, and oil-immersed construction provide stable and reliable resistance performance.
The 55X-SR is designed to provide accurate and stable standard resistance values for precision calibration and resistance measurement applications. Specific resistance values can be selected according to the required calibration application.
For accurate measurement and calibration, the recommended power dissipation is 10 milliwatts. The resistance element can withstand up to 1 watt of dissipation without harm.
