94
Reference Manual
00809-0200-4840, Rev BA
Section 5: Service and Troubleshooting
December 2014
Section 5: Service and Troubleshooting
5.5.11
Speed of sound (D914)
This indicates the temperature-corrected speed of sound calculated by the transmitter. It relates
the returned echo time delay to a distance. The value is calculated using the Temperature SoS
Calc value (
) and the base value entered into configuration parameter Speed of Sound
).
Field Communicator or AMS
To view the calculated speed of sound:
1.
From the
Home
screen, select 3: Service Tools.
2.
Select 1: Alerts.
3.
Select 2: Diagnostic Data.
4.
Select 2: Speed of Sound Data.
5.
Select 1: Speed of Sound D914.
6.
When finished, press “EXIT” to return to the previous menu.
Rosemount 3490 Series Control Unit
To view the calculated speed of sound:
1.
From the
Main Menu
screen, select MONITOR.
2.
Select the transmitter (e.g. “
Tx1: 3107
”).
3.
Select DIAGNOSTICS.
4.
Select Speed of Sound.
5.
When finished, press the ESC key to exit to the previous menu.
5.5.12
Temperature for SoS calculation (D915)
This indicates the temperature used in calculating the temperature-corrected speed of sound
(see above). The temperature may be a live or fixed value depending on the configuration of the
parameter Temperature (
).
Note
The live temperature is always indicated in the read-only parameter Temperature /
Fourth Variable (FV) (
).
Fast Keys
3, 1, 2, 2, 1
Fast Keys
3, 1, 2, 2, 2
Speed of Sound D914
1133.040 ft/s
EXIT
HELP
(Field Communicator Screen)
Speed of Sound D914
1133.0ft/s
(Rosemount 3491 Screen)
Содержание 3107
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