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Terms for subject Metrology (347 entries)

resolution	The least interval between two adjacent discrete details which can be distinguished one from the other. In the case of an instrument with digital output, the term "resolution" is often understood as the smallest change in the output
resonance frequency	The frequency of a sinusoidal input signal which coincides with the inherent frequency of the system thus producing an extra large output
response time	The length of time required for the output of a transducer to rise to a specified percentage of its final value as a result of a step change of measurand
rise time	For a step response, the time interval between the instant when the output signal, starting from zero, reaches a small specified percentage (for instance 10%) of the final steady-state value, and the instant when it reaches for the same time a specified large percentage (for instance 90%) of the same steady state value
RMS detector	root-mean-square detector
root-mean-square voltage	rms voltage
RMS detector	root-mean-square detector
root-mean-square voltage	rms voltage
safety barrier	A device for use between intrinsically safe and non intrinsically safe circuits for the purpose of limiting the voltage and current in the intrinsically safe circuits to levels incapable of causing ignition
Sch	Some standards (ANSI, JIS) feature different pipe schedules of a pipe which are defined by the wall thickness; the higher the schedule value, the thicker is the wall. Different schedules for pipes of one nominal width mean different inner diameters
schedule	Some standards (ANSI, JIS) feature different pipe schedules of a pipe which are defined by the wall thickness; the higher the schedule value, the thicker is the wall. Different schedules for pipes of one nominal width mean different inner diameters
SCS	System for monitoring pH electrodes and/or reference electrodes for breakage or blockage respectively
sensitivity	The change in the response of a measuring instrument divided by the corresponding change in the stimulus
sensor	The primary element of a measuring chain which converts the input variable into a signal suitable for measurement
sensor check system (SCS)	System for monitoring pH electrodes and/or reference electrodes for breakage or blockage respectively
settling time	Time interval between the step change of an input signal and the instant when the resulting variation of the output signal does not deviate more than a specified tolerance (for instance 5%) from its steady state value
shock	A sudden nonperiodic motion caused by a blow, impact, collision, concussion or violent shake or jar. There are two methods used to quantify and measure shock: specification of a value of acceleration and deceleration together with its duration specification of a height or free fall on to a specified flat surface
shock resistance	The ability of measuring equipment to withstand sudden mechanical loading without permanent impairment of operating characteristics
shut-off valve	Used to interrupt medium flow. The movement of the blocking device in valves is linear and parallel to the flow direction
Sievert	Unit of measurement for dose rate