3410 Series Gas Ultrasonic Meters Operations Manual
Section 7: Tools commands
3-9000-777 Rev D
June 2016
Calculate SOS for the gas composition
131
3.
If you are connected to a meter with pressure or temperature set to
Fixed
or
Live
, the
values are read from the meter and entered in the
Pressure/temperature
inputs.
If you are not connected, enter the Pressure and Temperature for the gas. Pressure can
be entered as either absolute or gage. Select the desired pressure type. If Gage is
selected for pressure type, enter in the Atmospheric pressure. The label after the units
for Pressure and Temperature is set as follows:
•
User: The value was entered manually or imported from a saved file.
•
Fixed: The value was read from a meter with the value set as Fixed.
•
Live: The value was read from a meter with the value read from a Live sensor.
•
Frozen: Indicates the value is frozen on the last good reading before going either
into alarm or calibration.
4.
If you are connected to a meter, the Meter average SOS will always be read from the
meter and displayed.
5.
While connected to a meter, click
Read from Meter
to display a dialog to give you the
option to update Pressure, Temperature, Meter average SOS, and Gas Composition.
Only available options will be enabled.
6.
In addition to reading values from a meter, click
Write to Meter
to display a dialog to give
you the option to write Pressure, Temperature, and Gas Composition to the meter. Only
available options will be enabled. Pressure and Temperature must be set to
Fixed
in the
meter to enable the selections to write these values to the meter. Likewise to enable the
Gas Composition selection, a meter must be configured for AGA 8 Detailed Method. If
no options are available, the Write to Meter button will be grayed out.
7.
Once the gas composition and operating conditions are entered, click
Calculate
to
compute the Compressibility (Zf), Density, and Computed SOS.
If connected to a meter the Percent difference will show the percent error from the
Average meter SOS to the Computed SOS.
8.
Enter a
Comment
to associate with the SOS calculation. The comment is included in
saved gas composition files and print outs.
9.
Click
Save
to save the Meter Name if connected to a meter, Company Name as set under
File|Program Settings
, Date and Time based on the PC clock, Comment, Gas
composition inputs, Pressure/temperature inputs, and Calculated values to a comma-
separated values (.csv) file.
10.
Click
Open
to select a saved gas composition file to bring into the SOS Calculator. Only
the Gas composition inputs, Pressure/temperature inputs, and Comment are imported
from a saved file.
