Chapter 3.
56
Model CTF878 Startup Guide
3.1.5.5
Entering Path Parameters
To enter the Path option, scroll to the Path entry on the Program Menu and press
[ENTER]
. (From the Fluid window, you
can scroll back up to the Fluid tab and and press
[ENTER]
.) The screen appears similar to Figure 38 below. To step
through each parameter, press the [
] key. Refer to
Program Menu Map, Figure 46 on page 65.
Figure 38: Path Window
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. It is pointless 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.
Transducer Pipe Fluid
Tag Path
OK
Cancel
152.4 mm
Txdr Spacing
69.85 mm
Transducer/Pipe
Path
Summary of Contents for CTF878
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