Siemens SITRANS F - 2.2 The Pipe Data Menu

1-16
1010PFM-3G
Section 1
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. Only clamp-on or in-line transit-time opera-
tion is allowed. Benefits include the highest available precision and enhanced immunity to distorted
flow profile conditions.
Channel 1+2 and Channel 1-2
Arithmetic operation produces data output via a virtual Channel 3, proportional to sum or difference of
the liquid flow of two independent pipes. This requires setting the two channels to operate indepen-
dently. Only clamp-on or in-line transit-time operation is supported.
Channel 1
Flow
Channel 2
Flow
PIPE `A'
PIPE `B'
Pipe 'A' Flow Rate
Pipe 'B' Flow Rate
Channel 1
Flow
Channel 2
Flow
Ch1 + Ch2
2
Output
(average of
Ch 1 & Ch 2)
Pipe
Dual Channel Flow
Dual Channel Flow provides two independent measurement channels that operate simultaneously.
Depending on the specific model, Dual Channel Flow supports: Clamp-on Transit-time, In-line Transit-
time, and Reflexor.
PIPE `A'
PIPE `B'
PI
P
E
`
A
'
F
L
O
W
R
A
T
E
P
I
P
E
`
B
'
F
L
O
W
R
A
T
E
Channel 1
Flow
Ch1 (+/-) Ch2
Output
(sum or
difference of
Ch1 and Ch 2)
Channel 1
Flow