Chapter 8. Servicing the PT878

8.7.2 Calibrating Inputs (cont.)

4.Press the [X] arrow key to move to the Read box, and then press [ENTER] to read the low input.

5.The next prompt asks for the value to which you want to set the high input (20 mA).

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

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

c.Press [ENTER] to confirm your entry.

6.Press the [X] arrow key to move to the Read box, and then press [ENTER] to read the high input.

7.Press the [T] key to move to the Calibrate box, and press [ENTER] to calibrate the inputs.

8.At this point, you have two options:

a.If you are unsatisfied with the calibration, you can reset the inputs to factory defaults. Press the [X] arrow key to move to the Reset box, and then press [ENTER] to undo the calibration.

b.If you are satisfied with the calibration, press the [T] key to return to the Input# prompt, and repeat steps 2 through 8 for the other input.

You have completed calibrating the inputs. To leave the Inputs window,

•Press the [S] key to return to the Inputs tab, and the [W] arrow key to move to the Outputs tab.

•Press [F2] (Cancel) to return to Operate Mode without confirming the changes.

•Press [F3] (OK) to confirm the new data. The PT878 returns to Operate Mode.

Transport® Model PT878 Portable Liquid Flowmeter User’s Manual

177

Page 192 Page 194
Page 193
Image 193
GE PT878 user manual Calibrating Inputs
Page 192 Page 194

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.
Top Page Image Contents