indirect measuring method |
A method of measurement in which the value of a measured variable is obtained by measurement of other quantities functionally related to the measured variable. Example: Measurement of a pressure by a column of liquid |
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indirect method of measurement |
A method of measurement in which the value of a measured variable is obtained by measurement of other quantities functionally related to the measured variable. Example: Measurement of a pressure by a column of liquid |
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direct method of measurement |
A method of measurement in which the value of a measured variable is obtained directly, rather than by measurement of other quantities functionally related to the measured variable. Note: The method of measurement remains direct even if it is necessary to make supplementary measurements to determine the values of influence quantities in order to make corresponding corrections. Example: Measurement of a length using a graduated rule |
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X-ray test |
A non-destructive material test that allows assessment of the quality of a material or weld |
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dye penetration test |
A non-destructive material test that gives information about the presence of fissures, overlaps, folds, pores and bonding faults in the surface of a material |
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ultrasonic test |
A non-destructive material test that gives information about the presence of inclusions or cavities beneath the surface of a material |
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protocol |
A protocol is a set of conventions relating to the data format and control procedures necessary for communication between two devices or processes |
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variable |
A quantity or condition whose value is subject to change and can usually be measured |
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influence quantity |
A quantity which is not the subject of measurement, but which influences the value of the measured variable of the indication of the measuring instrument, e.g. ambient temperature |
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measurement influence |
A quantity which is not the subject of measurement, but which influences the value of the measured variable of the indication of the measuring instrument, e.g. ambient temperature |
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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 |
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connection compartment |
A separate compartment or part of a main enclosure, communicating or not with the main enclosure, and containing connection facilities |
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terminal compartment |
A separate compartment or part of a main enclosure, communicating or not with the main enclosure, and containing connection facilities |
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analog signal |
A signal, the information parameter of which may assume all values in a given range |
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analogue signal |
A signal, the information parameter of which may assume all values in a given range |
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digital signal |
A signal, the information parameter of which may assume any value out of a set of discrete values which are represented by numbers |
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standardised signal |
A signal, the lower and upper range-values of which are standardised, e.g. 4...20 mA |
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ambient condition |
A specification of surrounding parameter values necessary for the protection or proper operation of a function unit. The condition is usually specified as a nominal value and a tolerance range |
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environmental condition |
A specification of surrounding parameter values necessary for the protection or proper operation of a function unit. The condition is usually specified as a nominal value and a tolerance range |
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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 |
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