Baker Panametrics CTF878, Руководство по программированию, Страница: 19 / 88

Model CTF878 Programming Manual 13
Chapter 1. Programming Site Data
1.8.1 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 14: Typical Clamping Fixture/Transducer Setup
UPSTREAM
UPSTREAM
DOWNSTREAM
DOWNSTREAM
CLAMPING
FIXTURE
PIPELINE
(no taps)
TAG PATH
TRANSDUCER
SPACING
FLOW
RECEIVER
RECEIVER
TRANSMITTER
TRANSMITTER