Appendix C. Temperature Transmitter Installation

C.2 Mounting RTDs on the Pipe

The factory supplies a clamping fixture to mount the RTDs to the pipe; however, you must assemble the clamping fixture before you can mount the RTDs to the pipe. Use the following instructions below to mount the RTDs.

C.2.1 Assembling the Clamping Fixture

The clamping fixture consists of the following parts:

one strap (length depends on the pipe size)

a screw buckle

a feeder buckle

To assemble the clamping fixture:

1.Cut the strap equal to the circumference of the pipe.

2.Fold 1/2 inch of one end of the strap into a hook shape.

3.Secure the screw buckle to one end of the strap by placing the strap through the buckle and folding the strap.

4.Crimp the strap closed to secure the screw buckle in place.

5.Each RTD has a securing post (located on the rounded portion of the RTD) that secures the RTD in place when it is mounted on the pipe. Place the RTD on the strap by sliding the strap under the securing post.

IMPORTANT: Make sure you place the RTD on the strap so when the strap is wrapped around the pipe, the flat surface of the RTD sits against the pipe.

6.Secure the feeder buckle to the other end of the strap by placing the strap through the buckle and folding the strap (the folded section should be approximately 1/2 inch).

7.Crimp the strap closed to secure the feeder buckle in place.

Repeat steps 1 through 7 for the remaining RTD and clamping fixture. When you have completed assembly, proceed to the next section to fasten the RTD to the pipe.

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GE PT878 user manual Mounting RTDs on the Pipe, Assembling the Clamping Fixture

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.