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Terms for subject Metrology (347 entries)

application	Specification of the applications for which the measurement equipment is designed, together with the reasons for its use
associated electrical apparatus	An electrical apparatus in which the circuits or parts of circuits are not all necessarily intrinsically safe but which contains circuits that can affect the safety of the intrinsically safe circuits associated with it
AF generator	audio-frequency generator
barrier	An electrical device that separates two circuits, e.g. an intrinsically safe circuit from a non-intrinsically safe circuit
basic setting	Settings which must be made before the instrument will measure, e.g. sensor type for Prosonic
baudrate	Units for data transmission rate, 1 Baud = 1 bit/s
Bayard-Alpert gauge	B-A gauge
binary signal	Quantises signal with only two possible values
bluff body	Nonstreamlined body used in vortex flowmeters to shed vortices. The body may be prismatic, a semi-elliptical modified parabola, a semistreamlined cylinder or modified triangle, or any combination of these forms
C-A thermocouple	chromel-alumel thermocouple
calibration	The set of operations which establish the relationship under specified conditions between the quantities measured and corresponding values of the output of the device
calibration curve	A representation of the relationship between the values of the quantity measured and the corresponding values actually given by the device, under defined conditions
cell	Transparent sample vessel for the determination of concentration by colorimetric or turbidity comparison methods
CGS system	centimeter-gram-second system
centimeter-gram-second unit	cgs unit
certificate of compliance	Certificate in which the manufacturer confirms that the products supplied comply with the agreements made on ordering, but without the listing of the results
certificate of conformity	A document issued by an independent officially recognised body or organisation stating that the pertinent specifications of a device or system comply with the specific requirements as laid down in an officially designated document, e.g. PTB certificates for explosion protection
certificate of origin	Certificate signed by a chamber of commerce confirming the origin of goods
certified instrument	Instruments which have been calibrated, sealed and approved by the authorities
CGS system	centimeter-gram-second system