Opened 15 months ago

Last modified 13 months ago

#174 new requirement

Genauigkeit PT100 Schnittstelle

Reported by: (none) Owned by: Erik Welander
Priority: major Milestone:
Component: Steuerelektronik Severity:
Keywords: Cc:
Data type: Deadline:
Depending on: 153 Implements:
Memaddress: Observerlist:
Parent: #104 Answer:
Type: system Revieweraccept:
Reviewerlist: hantzsch,welander Reviewerreject:
Priority: normal Visibility:
Writable: Class: functional
Criticality: must have

Description (last modified by Erik Welander)

Für die Trockenkalibrierung muss die Temperatur bei Raumtemperatur mit kleiner Fehler als 0.58 K bestimmt werden können. Dies beinhält alle Fehler inklusive Fehler vom Sensor und Messungenauigkeit der HW-Schnittstelle.

Herleitung:
Vor allem für Trockenkalibrierung ist die hohe Genauigkeit notwendig. Schallgeschwindigkeit soll mit einer Genauigkeit von 0,1 % bestimmt werden.

Störung (laut AGA8) bei Temperatur T = 293,15 K Stickstoff, 1 bar : dSoS/dT = 0,6 m/s/K.
Maximalfehler Schallgeschwindigkeit dSoS_max < 0,001 * 349,102 = 0,3491.
0,3491 / 0,6 = 0,5816

Change History (7)

comment:1 by Erik Welander, 15 months ago

Description: modified (diff)
Reporter: Erik Welander removed

comment:2 by Erik Welander, 15 months ago

Description: modified (diff)

comment:3 by Erik Welander, 15 months ago

Description: modified (diff)

comment:4 by Erik Welander, 14 months ago

Parent: #104 → #199

comment:5 by Erik Welander, 14 months ago

Description: modified (diff)

comment:6 by Erik Welander, 13 months ago

Description: modified (diff)
Parent: #199 → #104
Type: hardware → system

comment:7 by Erik Welander, 13 months ago

Depending on: → 153
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