7 Parameter of the gas
Manual ERZ 2000-NG · EN07 · 2019, May 13th
285
Note
ISO 6976:2016 must only be activated if the model for determining gas compo-
sition utilises a complete gas analysis.
7.4.2
DB Calculation according to AGA10/Helmholtz ISO20765-
1:2005
Figure 207: Menu DB Calculation according to AGA 10 / Helmholtz ISO20765-
1:2005
Calculation according to AGA 10 / Helmholtz ISO20765-1:2005 allows for determina-
tion of parameters which are required for the orifice measurement.
In recent years, the number of flow meters for natural gas using an ultrasonic transit
time difference method for medium and high pressures with medium and larger nom-
inal widths has multiplied many times over. Many of these devices offer determination
of the velocity of sound (VOS) by means of ultrasound.
If AGA 10 is also used for calculation of the velocity of sound based on the gas com-
position (
DB09
), 2 independent measurement values are available for control pur-
poses:
x
A change of the gas composition can be recognized
This allows for a "quick" detection of change with the slow measurement de-
terminations of a GC
Содержание ERZ2000-NG
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Страница 43: ...2 Introduction Manual ERZ 2000 NG EN07 2019 May 13th 33 Figure 17 Display of the ERZ2000 NG in the browser...
Страница 68: ...2 Introduction Manual ERZ 2000 NG EN07 2019 May 13th 58 Figure 44 Menu LA Overview...
Страница 69: ...2 Introduction Manual ERZ 2000 NG EN07 2019 May 13th 59 Figure 45 Menu LB Totalizer BM1...
Страница 77: ...2 Introduction Manual ERZ 2000 NG EN07 2019 May 13th 67 Figure 51 Overview System sub menu...
Страница 109: ...3 Electrical connections Manual ERZ 2000 NG EN07 2019 May 13th 99 Figure 81 Menu EH Module assembly...
Страница 111: ...3 Electrical connections Manual ERZ 2000 NG EN07 2019 May 13th 101 Figure 83 Menu EI Configuration...
Страница 241: ...6 Flow meters Manual ERZ 2000 NG EN07 2019 May 13th 231 Figure 167 Interface module C34...
Страница 261: ...6 Flow meters Manual ERZ 2000 NG EN07 2019 May 13th 251 6 5 2 AP diff pressure Figure 184 Menu AP differential pressure...
Страница 340: ...8 Overview Coordinates Manual ERZ 2000 NG EN07 2019 May 13th 330 8 5 6 TSV export...
Страница 345: ...9 Faults Manual ERZ 2000 NG EN07 2019 May 13th 335 9 1 2 JB Message register Figure 249 Menu JB Message register...
Страница 347: ...9 Faults Manual ERZ 2000 NG EN07 2019 May 13th 337 9 1 4 JD Debugging Figure 251 Menu JD Debugging...
Страница 448: ...Appendix Manual ERZ 2000 NG EN07 2019 May 13th 438 K 18 T Trend TA Trend block See chapter 2 5 8 Trend...
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