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4 Functional principle – Ultrasonic-flow measurement
5. Parameter AX-07 "maximum timeout":
Time [minutes] in which a new telegram must have come
48
Time [minutes] in which a new telegram must have come
Timeout: During the transfer of data, an adjustable time-out is
available, generating a status signal if no new data arrived within
the adjusted time.
6. Parameter AX-10
"Modbus-Master Target": "GC9300"?
If yes, continue after 8, otherwise at 7.
7. Parameter AZ-01 - AZ-54
Enter Modbus registers of the gas components and status of the
slave device
Treatment of the gas data
The gas data are validated after transmission and optionally normalized. The
AGA-10 gas equation accepts up to 21 gas components; it might even accept up
to 24 components adding some (surplus) gas components to other components.
Neo-pentane: added to n-pentane (see ISO 12213-2)
Propene: added to propane
Ethen: added to CO
Hexane+: sum of n-hexane, n-heptane, n-octane, n-nonane and n-decane. If there
is only hexane+ in the samples and none of the above-mentioned components,
then hexane+ is added to hexane. In case one of these components is > 0, then
hexane is + ignored.
.
Normalization to 100 mol-%: If the sum of gas components isn't 100 mol-%, then
the components are normalized to a total of ˃ 100 mol-% (can only be applied if
the sum is > 0 mol-% and < 110 mol-%). Otherwise, Bit 0 in AW-01 "SOS calcula-
tion status" will be set and the calculation takes place with 100 mol-% methane in-
stead.
Manual USM GT400 · EN10 · May 2021
(see ISO 12213-2).
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