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--- en:infra-convert:user:terms [2019/09/04 17:08]
me [Category (characteristic-)]
+++ en:infra-convert:user:terms [2019/10/07 13:34]
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  **M**\\
  • [[en:infra-convert:user:terms#Measurement (sizes-)]]\\
+ **N**\\
+ • [[en:infra-convert:user:terms#Numerical precision]]\\
  **P**\\
  • [[en:infra-convert:user:terms#Project]]\\
@@ Line 509: / Line 511: @@
 ==== Measurement (sizes-) ====
-**(Size-)measurements** are used to specify geometric (and other) properties of a product. The meanings of important terms for geometric measurement specifications in #@IC_HTML@# are defined below.
+**(Size-)measurements** are used to specify geometric and other physical properties of a product (→[[en:infra-convert:user:terms#characteristic_test-_quality|variables Merkmal]])
-The following terms apply to linear measurement elements and measurement tolerances.
+**(Größen-)Maße** spezifizieren quantifizierbare geometrischer und andere physikalische Eigenschaften eines Produkts (→[[de:infra-convert:user:terms#merkmal_pruef-_qualitaets|variable characteristic]]). They are expressed as the multiple or part (numerical value) of a reference value (unit of measurement):
-{{ :en:infra-convert:user:terms:aufbau_mass.png?direct&860 |}}
+<WRAP group>
+<WRAP centeralign>
+<html><font size="+1">Size = Numerical value × Unit of measurement</font></html>
+</WRAP>
+</WRAP>
+The following graphic explains some of the terms used in #@IC_HTML@# for linear measurements and measurement tolerances.
+{{ :en:infra-convert:user:terms:aufbau_mass.png?nolink&860 |}}
+In #@IC_HTML@#, the **unit of measurement** is assigned to a characteristic using the [[en:infra-convert:user:terms#class_characteristic|characteristic class]]. The following units with attachments for decimal parts and multiples from different unit systems are available.
+Note Your CAQ system provider or administrator can change class names and associated units of measurement for you, see Administrator's Manual infra CONVERT 2019 > Configuration and Import > Parameter File "CharacteristicClasses".
+> **Note** Your CAQ system provider or administrator can change class names and associated units of measurement for you, see Administrator's Manual #@IC_HTML@# > Configuration and Import > [[en:infra-convert:dev:characteristicclasses|Parameter file "CharacteristicClasses"]].
+|< 100% 15% 25% 10% 25% 25% >|
+^  Size type  ^  Unit name  ^  Unit-\\ symbol ^  Reference  ^  ID  ^
+^ Length, distance ^ Micrometer | µm | DIN 1301-1:2010-10 | Micrometer |
+^ ::: ^ Millimetre | mm | DIN 1301-1:2010-10 | Millimeter |
+^ ::: ^ Centimetre | cm | DIN 1301-1:2010-10 | Centimeter |
+^ ::: ^ Decimetre*¹ | dm | DIN 1301-1:2010-10 | Decimeter |
+^ ::: ^ Metre | m | DIN 1301-1:2010-10 | Meter |
+^ ::: ^ Mikroinch | µin | [NIST-19] | Microinch |
+^ ::: ^ Milliinch | mil | [NIST-19] | Mil |
+^ ::: ^ Inch | in | [NIST-19] | Inch |
+^ ::: ^ Foot | ft | [NIST-19] | Foot |
+^ ::: ^ Yard | yd | [NIST-19] | Yard |
+^ Angle ^ Degree | ° | DIN 1301-1:2010-10 | Degree |
+^ ::: ^ Radiant*² | rad | DIN 1301-1:2010-10 | Radiant |
+^ ::: ^ Steradiant*² | sr | DIN 1301-1:2010-10 | Steradiant |
+^ Area ^ Square millimetre*³ | mm² | DIN 1301-1:2010-10 | SqareMillimeter |
+^ ::: ^ Square centimetre*³ | cm² | DIN 1301-1:2010-10 | SquareCentimeter |
+^ ::: ^ Square metre*³ | m² | DIN 1301-1:2010-10 | SquareMeter |
+^ Volume ^ Kubikmillimetre*¹ | mm³ | DIN 1301-1:2010-10 | CubicMillimeter |
+^ ::: ^ Cubic millimetre*¹ | cm³ | DIN 1301-1:2010-10 | CubicCentimeter |
+^ ::: ^ Cubic centimetre*¹ | dm³ | DIN 1301-1:2010-10 | CubicDecimeter |
+^ ::: ^ Cubic metre*¹ | m³ | DIN 1301-1:2010-10 | CubicMeter |
+^ ::: ^ Milliliter*³ | ml | DIN 1301-1:2010-10 | Milliliter |
+^ ::: ^ Liter, Litre*¹ | l, L | DIN 1301-1:2010-10 | Liter |
+^ ::: ^ Cubic inch*² | in³ | [NIST-19] | CubicInch |
+^ Mass, weight ^ Microgram*¹ | µg | DIN 1301-1:2010-10 | Microgram |
+^ ::: ^ Milligram*¹ | mg | DIN 1301-1:2010-10 | Milligram |
+^ ::: ^ Gram | g | DIN 1301-1:2010-10 | Gram |
+^ ::: ^ Kilogram | kg | DIN 1301-1:2010-10 | Kilogram |
+^ ::: ^ Ton | t | DIN 1301-1:2010-10 | Ton |
+^ ::: ^ Gran/Grain | gr | [NIST-19] | Grain |
+^ ::: ^ Dram | dr | [NIST-19] | Dram |
+^ ::: ^ Ounce | oz | [NIST-19] | Ounze |
+^ ::: ^ Pound | lb | [NIST-19] | Pound |
+^ ::: ^ Pound-mass*² | lb | – | PoundMass |
+^ ::: ^ Tex*² | tex = 1 g/km | DIN 1301-1:2010-10 | Tex |
+^ ::: ^ Milligrams per square metre*³ | mg/m² | – | MilligramPerSquareMeter |
+^ Force ^ Newton*¹ | N | DIN 1301-1:2010-10 | Newton |
+^ ::: ^ Decanewton*¹ | daN | DIN 1301-1:2010-10 | DecaNewton |
+^ ::: ^ Kilonewton*¹ | kN | DIN 1301-1:2010-10 | KiloNewton |
+^ ::: ^ Newton per metre*¹ | N/m | – | NewtonPerMeter |
+^ ::: ^ Pound-force*² | lbf | – | PoundForce |
+^ Pressure ^ Millibar*¹ | mbar | DIN 1301-1:2010-10 | Millibar |
+^ ::: ^ Bar*¹ | bar | DIN 1301-1:2010-10 | Bar |
+^ ::: ^ Pascal*¹ | Pa | DIN 1301-1:2010-10 | Pascal |
+^ ::: ^ Hectopascal*¹ | hPa | DIN 1301-1:2010-10 | Hectopascal |
+^ ::: ^ Kilopascal*¹ | kPa | DIN 1301-1:2010-10 | Kilopascal |
+^ ::: ^ Megapascal*¹ | MPa | DIN 1301-1:2010-10 | Megapascal |
+^ ::: ^ Pound-force per square inch*² | lbf/in² | [NIST-19] | PoundForceSquareInch |
+^ Zeit ^ Millisecond*¹ | ms | DIN 1301-1:2010-10 | Millisecond |
+^ ::: ^ Second*¹ | s | DIN 1301-1:2010-10 | Second |
+^ ::: ^ Minute*¹ | min | DIN 1301-1:2010-10 | Minute |
+^ ::: ^ Hour*¹ | h | DIN 1301-1:2010-10 | Hour |
+^ ::: ^ Per millisecond*¹ | 1/ms | DIN 1301-1:2010-10 | PerMillisecond |
+^ ::: ^ Per second*¹ | 1/s | DIN 1301-1:2010-10 | PerSecond |
+^ ::: ^ Per minute*¹ | 1/min | DIN 1301-1:2010-10 | PerMinute |
+^ ::: ^ Per hour*¹ | 1/h | DIN 1301-1:2010-10 | PerHour |
+^ Speed ^ Metre per second | m/s | DIN 1301-1:2010-10 | MeterPerSecond |
+^ ::: ^ Metre per minute | m/min | DIN 1301-1:2010-10 | MeterPerMinute |
+^ ::: ^ Kilometres per hour | km/h | DIN 1301-1:2010-10 | KilometerPerHour |
+^ Flow rate ^ Liters per minute*³ | l/min | DIN 1301-1:2010-10 | LiterPerMinute |
+^ ::: ^ Cubic metres per second*³ | m³/s | – | CubicMeterPerSecond |
+^ ::: ^ Cubic metres per minute*³ | m³/mih | – | CubicMeterPerMinute |
+^ Mass flow ^ Kilograms per second*³ | l/min | DIN 1301-1:2010-10 | KilogramPerSecond |
+^ Energy, work, heat ^ Newtonmetre | Nm | DIN 1301-1:2010-10 | Newtonmeter |
+^ ::: ^ Joule*³ | J | DIN 1301-1:2010-10 | Joule |
+^ ::: ^ Pound-force-inch*² | lbf-i | – | PoundForceInch |
+^ ::: ^ Pound-force-foot*² | lbf-ft | – | PoundForceFoot |
+^ Effort ^ Milliwatt*³ | mW | DIN 1301-1:2010-10 | MilliWatt |
+^ ::: ^ Watt*³ | W | DIN 1301-1:2010-10 | Watt |
+^ ::: ^ Kilowatt*³ | kW | DIN 1301-1:2010-10 | KiloWatt |
+^ Temperature ^ Degrees Celsius | °C | DIN 1301-1:2010-10 | Celsius |
+^ ::: ^ Degrees Fahrenheit | °F | [NIST-19] | Fahrenheit |
+^ ::: ^ Kelvin*¹ | K | DIN 1301-1:2010-10 | Kelvin |
+^ Electricity ^ Volt*³ | V | DIN 1301-1:2010-10 | Volt |
+^ ::: ^ Ampere*³ | A | DIN 1301-1:2010-10 | Ampere |
+^ ::: ^ Ohm*³ | Ω | DIN 1301-1:2010-10 | Ohm |
+^ Level ^ Decibel*³ | dB | DIN 5493:2013-10 | Decibel |
+^ Auxiliary units ^ Number (of pieces)*³ | pcs = Stk. | – | Piece |
+^ ::: ^ Per million, Parts per million*¹ | pm = ppm | – | PerMillion |
+^ ::: ^ Percent*¹ | % | DIN 5466:1983-02 | Percent |
+^ ::: ^ Mol*³ | mol | DIN 1301-1:2010-10 | Mol |
+| NIST-19: National Institute of Standards and Technology, Gaithersburg, Maryland, USA: NIST Handbook 44 : Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices (Appendix C. General Tables of Units of Measurement) 2019.\\ *¹ Available from program version 1.2.0.23\\ *² Available from program version 1.3.9.5\\ *³ Available from program version 1.3.9.8 |||||
+\\
+----
+\\
+==== Numerical precision ====
+The numerical precision is relevant for the representation of numerical values. If a technical fact is described with numerical values, usually in the form of physical quantities or →[[en:infra-convert:user:terms#measurement_sizes|measurement sizes]], the
+accuracy of the displayed number should be in the same order of magnitude as the inaccuracy of the measure itself.
+For example, the maximum inaccuracy range of the value 23, if no further information is available, is 22.5 to <23.5. Finally, the value may have resulted from a rounding operation. The last significant digit, here the "3", is the digit that was rounded or may have been rounded.
+|< 100% 15% 15% 30% 25% 15% >|
+^  Value  ^  Number of relevant digits  ^  Rounding range (absolute inaccuracy range)  ^  Size of the absolute inaccuracy range  ^  Size of relative inaccuracy  ^
+|  2**3**  |  2  |  22,5 to <23,5  |  1  |  4,35 %  |
+|  2,**3**  |  2  |  2,25 to <2,35  |  0,1  |  4,35 %  |
+|  23,**0**  |  3  |  22,95 to <23,05  |  0,1  |  0,435 %  |
+|  2**3**00  |  2  |  2250 to <2350  |  100  |  4,35 %  |
+|  0,00023**0**  |  3  |  0,0002295 to <0,0002305  |  0,000001  |  0,435 %  |
+The number of significant or relevant digits in a decimal number can be identified as follows (see also "DIN EN ISO 80000-1:2013-08, Chapter 7.3.4 Deviation and uncertainty"):
+  - The number is viewed from left to right. The first non-zero digit is the first relevant digit.
+  - Following zeros are also relevant, especially if they are to the right of the decimal point.
+  - Zeros to the left of the comma are only relevant if at least one other digit, including zero, follows to the right of the comma.
+The numerical accuracy common in technology ("slide rule accuracy") is achieved by rounding a value so that three significant digits remain. Unless the first significant digit is a one, four significant digits should remain.
 \\

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