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February 2009
1-16
Programming Site Data
Path Parameters for
Clamp-On Transducers
The CTF878 path menu includes two parameters:
•
TAG Path
•
Transducer Spacing
The
TAG Path
is calculated from the data entered in the Pipe
parameters under Program. It can be overwritten if the user wants to
use a value other than the one calculated by the flowmeter. However,
it must always match the
TAG Path
set on the clamping fixture for
reliable operation. If the path is changed on the instrument and on the
clamping fixture, it must be within ±10% of the original
TAG Path
calculated by the flowmeter.
The
Transducer Spacing
is calculated from the data entered in the
Transducer/Pipe/Fluid parameters. The value of
Transducer Spacing
is NOT used in the flowmeter’s data processing, unlike the Tag Path.
Do not attempt to change the
Transducer Spacing
in the instrument.
It is only an output intended to tell the user the distance to be set
between a Transmitter and a Receiver for optimal signal transmission.
Figure 1-14: Typical Clamping Fixture/Transducer Setup
UPSTREAM
UPSTREAM
DOWNSTREAM
DOWNSTREAM
CLAMPING
FIXTURE
PIPELINE
(no taps)
TAG PATH
TRANSDUCER
SPACING
FLOW
RECEIVER
RECEIVER
TRANSMITTER
TRANSMITTER
Summary of Contents for CTF878
Page 1: ...GE Sensing Model CTF878 Clamp On Tag Flowmeter Programming Manual ...
Page 2: ...GE Sensing Model CTF878 Clamp On Tag Flowmeter Programming Manual 910 254PA4 February 2009 ...
Page 7: ...Chapter 1 ...
Page 47: ...Chapter 2 ...
Page 59: ...Chapter 3 ...
Page 60: ...Creating and Managing Sites Introduction 3 1 Site Manager 3 2 ...
Page 73: ...Chapter 4 ...
Page 89: ...Chapter 5 ...