Emerson Process Management rosemount 3300 series manual Damping value

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00809-0100-4811, Rev AA October 2002

Rosemount 3300 Series

+LJK￿/HYHO￿5DWHV	The measurement signal is filtered in order to minimize the influence of
	disturbing noise. In most measurement situations this has no noticeable effect
	on the response time to level changes. If high level rates occur it may
)￿￿￿￿￿￿￿￿;	however be necessary to reduce the damping value in order to allow the
	Damping value:
	transmitter to respond quicker. If there is too much noise the damping value
	may be increased in order to get a stable measurement signal.
	You can use the RCT software or a HART 275 Communicator to change the
	Damping value. For the HART Communicator use the key sequence
	[1, 4, 4, 4].
	In the RCT software open the 6HWXS>2XWSXW tab and enter the desired
$￿￿￿￿￿￿

SETUP_OUTPUT

The Damping parameter determines how quickly the transmitter responds to level changes and how robust the measurement signal is against noise. Technically, a damping value of 10 means that in 10 seconds the output from the transmitter is about 63% of the new level value. Consequently, when there are rapid level changes in the tank, it may be necessary to decrease the Damping value for the transmitter to be able to track the surface. On the other hand, in noisy environments, and if level rates are low, it may be better to increase the damping value to have a stable output signal.

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