Chapter 8. Servicing the PT878

8.10.4 Setting Impulse Response (cont.)

2.The second prompt asks for the percent of gain.

a.Press [ENTER] to open the text box.

b.Use the numeric keys to enter the desired percentage.

c.Press [ENTER] to confirm your entry.

You have completed entering data for the Impulse Response option.

Press [F1] to start transmitting in the chosen direction.

Press [F2] to stop transmitting.

Press [F3] to leave the option and return to Operate Mode.

8.10.5 Taking Wave Samples for Diagnosis

The Wave Snapshot option allows you to capture receive signals to a file that you can send to a PC for diagnostic purposes. To use this option, scroll down to the Wave Snapshot entry in the Service Menu and press [ENTER]. The PT878 then captures three pairs of upstream and downstream raw signals to a file named Wave01.met. (If you repeat the captures, the successive files will be named Wave02.met, Wave03.met, etc.) You can then transfer the files over the IR port to a PC for analysis by a service engineer.

Note: Refer to page 104 for information on transferring a file to a PC.

8.10.6 Applying a Stored Signal for Diagnosis

The Simulate option places the PT878 in a mode in which it uses a stored signal (instead of the live signal from the transducers) to make flow calculations for diagnostic purposes. On the PC, you must rename a Wavexx.met file as Wave.met and send it back to the PT878 over the IR link. Then, on the PT878, scroll down to the Simulate entry in the Service Menu and press [ENTER]. The PT878 then applies the simulated signal.

Note: Refer to page 105 for information on transferring a file from a PC to the PT878.

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Transport® Model PT878 Portable Liquid Flowmeter User’s Manual

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GE PT878 user manual Taking Wave Samples for Diagnosis, Applying a Stored Signal for Diagnosis

PT878 specifications

The GE PT878 is a state-of-the-art portable ultrasonic flow meter designed for the precise measurement of liquid flow in various applications. As part of General Electric’s renowned instrumentation lineup, the PT878 combines innovative technology with user-friendly features, making it an invaluable tool for engineers, technicians, and plant operators.

One of the standout characteristics of the PT878 is its non-invasive measurement capability. The meter utilizes clamp-on transducer technology, allowing it to be installed on the exterior of the pipe, eliminating the need for invasive procedures which can disrupt the system or require pipe cutting. This non-contact approach not only simplifies installation but also enhances the device’s versatility, as it can be applied to a wide range of pipe sizes and materials.

The PT878 leverages advanced digital signal processing and sophisticated algorithms to provide accurate and reliable flow measurements. It operates using the time-of-flight method, whereby ultrasonic signals are sent and received through the fluid in the pipeline to determine the flow rate. This technology allows for remarkable precision, ensuring that operational efficiency can be maintained.

Moreover, the PT878 is equipped with features such as a bright, easy-to-read display, intuitive navigation, and robustness against harsh environmental conditions. Its compact and lightweight design enhances portability, making it suitable for field applications. The meter operates on battery power, providing a long-lasting solution for remote monitoring and temporary installations.

Another impressive aspect of the PT878 is its ability to measure not only water but also a variety of liquids, from hydrocarbons to chemicals. It supports multiple measurement modes, including volumetric flow and velocity, offering a level of flexibility that caters to diverse industrial needs.

In addition to flow measurement, the PT878 offers data logging capabilities, allowing users to store and analyze flow data over time. This function is vital for understanding trends, diagnosing issues, and optimizing system performance. Users can easily transfer data to computers for comprehensive analysis, enhancing operational insights.

With its combination of innovative technology, user-friendliness, and robust measurements, the GE PT878 ultrasonic flow meter stands out as a comprehensive solution for industries requiring reliable liquid flow measurement. Whether in a manufacturing plant, a water treatment facility, or any application requiring fluid monitoring, the PT878 delivers exceptional performance and accuracy.