Chapter 3. Programming Site Data

3.11 Entering User Functions (cont.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-

 

+

 

*

/

 

(

 

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

^

 

E

 

abs

exp

 

inv

 

ln

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

log

 

sqrt

 

MODE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

sin

 

cos

 

tan

asin

 

acos

 

atan

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tblA

 

tblB

 

tblC

tblD

 

tblE

 

tblF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Delete

 

 

Cancel

 

 

OK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 34: Function Creation Window

 

 

 

 

c.To enter a particular measured parameter into the equation, click on the MODE symbol in the middle of the third row. The Data Source Selection window (shown in Figure 30 on page 55) opens. Select the desired data source and unit as discussed on page 55, and press [F3] (OK) to confirm the entry.

d.When you have completed entering the function, press [F3] (OK) to confirm the entry and return to the User Function window.

6.GE recommends pressing [F2] (Check) to test the validity of the function. The PT878 displays either “OK” or a message such as “Syntax Error.”

Press [F1] to delete the entire function, or

Press [F3] (Done) to confirm the function and return to Operate Mode.

64

Transport® Model PT878 Portable Liquid Flowmeter User’s Manual

Page 80
Image 80
GE PT878 user manual Abs Exp Inv Log, Tan Asin, Atan

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.