Panametrics CTF878, Startup Manual

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Model CTF878 Startup Guide 1
Chapter 1.
Chapter 1.
1.1 Features and Capabilities
1.1.1 Overview
The Model CTF878 Clamp-On Tag Flowmeter represents one of the most technologically advanced flow
measurement systems in the world. It measures the flow rate of acoustically conductive single-phase gases. Unlike
most ultrasonic gas flowmeters, however, the CTF878 does not require the tapping of a pipe. It works with external
clamp-on ultrasonic transducers that do not interfere with gas flow.
Just clamp the transducers to the pipeline, follow some simple acoustic damping guidelines, program a few meter
settings, and start collecting flow data for months (or even years) with no maintenance.
The CTF878 represents a new level of capacity compared to previous gas clamp-on systems, in that it can measure
flow rates up to and greater than 150 ft/sec (46 m/sec), and it is less susceptable than previous systems to
cross-flow disturbances.
1.1.1.1 Electronics Package
In addition to the built-in LCD display, the flowmeter provides the following:
1. Two 0/4–20mA isolated outputs with a 550  maximum load.
2. Six additional slots available for any combination of the following I/O boards:
a.
Analog outputs: Select up to three additional output boards, each with four isolated 0/4–20 mA outputs, 1 k  max.
load
b. Analog inputs: Select up to three boards of one of the following types:
•
Analog Input Board with two isolated 4–20 mA inputs and 24 V loop power
• RTD Input Board with two isolated three-wire RTD inputs; span –148° to 662°F (–100° to 350°C); 100

Pt
c. Totalizer/Frequency outputs: Select up to three Totalizer/Frequency Output Boards each with four outputs per
board,
10 kHz max. All boards allow software-selectable functioning in two modes:
• Totalizer Mode: Pulse per defined unit of parameter
(e.g., 1 pulse/ft
3
)
•
Frequency Mode: Pulse frequency proportional to magnitude of parameter (e.g., 10 Hz = 1ft
3
/hr)