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Chapter 1
entire cross-section of the flow. The algorithm fits the basis functions of a
parametric model to the actual data. The result predicts flow velocities at
all points throughout the flow. These results are integrated over the cross-
sectional area to determine the discharge.
The key benefit to this approach is that the system will operate accurately
under different hydraulic conditions. As hydraulic conditions change, the
change will manifest itself in the distribution of velocity throughout the
depth of flow. As the ADFM is measuring the velocity distribution directly,
it will adapt to the changes in hydraulics, and generate a flow pattern that is
representative of the new hydraulic conditions, insuring an accurate esti-
mate of flow rate.
1-4.3
User Data Interfaces
The ADFM has three user data interfaces, which are listed in Table 1-16 be-
low.
Table 1-1:
Type:
RS-232
RS-422
Modem
For a complete set of specifications for the serial data interfaces please refer
to the EIA specifications. For more information on available modems,
please contact MGD Technologies Inc.
page 1-6
User Data Interface Types
Description:
Serial Data Interface, EIA standard RS-232C, used for local data
communication with the ADFM. Not to be used over distances more
than 15 meters. Maximum baud rate is 57600 Baud.
Serial Data Interface, EIA standard RS-422, used for local or remote
data communication over distances up to 1.2 km. Maximum Baud rate
is 115 kBaud.
28800 bps Modem with data compression and error correction
capabilities, used for remote data communication with the ADFM.
MGD Technologies, Inc.
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