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Terms for subject Metrology (318 entries)

stop cock	Used to shut off pipelines. In cocks the blocking device turns around an axis transverse to the medium current and permits medium passage in the open position. Ball valves and tap cocks are examples of stop cocks
storage and transportation condition	The specified conditions to which a device may be subject between the time of construction and the time of operation. Note: during storage or transportation the device is inoperative and appropriately protected and/or packed to meet the specified limits so that the device will not be damaged or suffer a degradation of performance
storage temperature	The ambient temperature range within which the measuring equipment may be safely transported and stored
storage temperature range	The range of temperature to which a device may be subjected between the time of construction and the time of operation
Strouhal number	Dimensionless parameter relating the vortex frequency f generated by a body having a characteristic dimension / to the fluid velocity a. It is given by the formula
suitability for custody transfer measurement	The ability of an instrument to be calibrated by the authorities for custody transfer measurement
SWAGELOK®	Registered trademark of Swagelok & Co., Solon, USA
Swiss Calibration Service	Calibration Laboratory accredited by the Swiss Confederation according to EN 45001
SWR indicator	standing-wave (ratio indicator
TEFLON®	Registered trademark of E.I. Du Pont de Nemours & Co., Wilmongton, USA. Tradename for FEP, PTFE, PFA
temperature	Indication of how hot or cold a substance is
temperature class	A classification of electrical apparatus for explosive atmospheres based on its maximum surface temperature
temperature effect	A change in temperature will affect the properties of sensor materials, and thus will influence the response of the sensor. A means of compensation for this effect is usually incorporated in the transmitter
temperature influence	A change in temperature will affect the properties of sensor materials, and thus will influence the response of the sensor. A means of compensation for this effect is usually incorporated in the transmitter
terminal compartment	A separate compartment or part of a main enclosure, communicating or not with the main enclosure, and containing connection facilities
terminal-based conformity	The closeness with which the calibration curve of a device can be adjusted to approximate to the specified characteristic curve so that the upper range-values and lower range-values of both input and output curves coincide
terminal-based non-conformity	The maximum deviation of the actual characteristic (average of upscale and downscale readings) from a specified curve coinciding with the actual characteristic at the upper and lower range-values
test report	Report in which the manufacturer confirms that the products supplied comply with the agreements made on ordering, with the listing of the results
thermal shock resistance	The ability of the measuring equipment to withstand an abrupt change in process medium temperature
TLD chip	thermoluminescent detector chip