Dual Channel Flow; Dual Path Flow; Channel 1+2 Flow - Siemens SITRANS FUS1020 Manual

Section 1
1.3 DESCRIPTION OF CHANNEL FUNCTIONS (FUS1010DN Systems only)
Dual Path FUS1020DN systems provide two flow measurement channels that allow its operation as
two completely independent single-channel flow meters. In addition, you can combine the two mea-
surement channels in the various meter types described below to enhance the functionality of the
system. On single channel systems, you do not get a choice of meter types since this requires two
independent measurement channels.

Dual Channel Flow

Dual Channel Flow provides two independent measurement channels that operate simultaneously.

Dual Path Flow

Dual Path Flow uses two measurement channels to achieve a single output via a "virtual" third chan-
nel. The resultant data is the average of the two channels. This meter type only supports clamp-on or
in-line transit-time operation. Benefits include highest available precision and enhanced immunity from
distorted flow profile conditions.
Pipe

Channel 1+2 Flow

Channel 1+2 produces a data output via a virtual Channel 3, proportional to the sum of the flow of two
independent pipes. This requires setting the two flow channels to operate independently.
Channel 1
Flow
PIPE `A'
PIPE `B'
Channel 2
Flow
Channel 1
Flow
Channel 2
Flow
1-5
Pipe 'A' Flow Rate
Pipe 'B' Flow Rate
Output
Ch1 + Ch2
(average of
2
Ch 1 & Ch 2)
1020NFM-1D
Virtual
Channel
3