GE General Electric Oxygen Equipment PT878 User Manual

Chapter 3. Programming Site Data

40

Transport® Model PT878 Portable Liquid Flowmeter User’s Manual

If you are using clamp-on transducers, the PT878 path menu includes two 
parameters:

Traverses

Spacing

The PT878 first prompts for traverses, the number of times the 
ultrasonic signal crosses the pipe (see the Liquid Transducer 
Installation Guide (916-055) for more details). 

Press 

[ENTER]

 to open the drop-down list of traverse numbers.

Scroll to the appropriate number. 

Press 

[ENTER]

 to confirm the entry.

The next prompt displays the spacing of the transducers, as calculated 
from the information entered.

Record this number and use it to space the transducers. (Use the 
Liquid Transducer Installation Guide (916-055) to assist in 
installing transducers on the pipe.) Press the [T] key to scroll to the 
next parameter.

If necessary, you can overwrite the spacing to match the actual 
physical spacing of the transducers. (Do not change the spacing by 
more than ±10% from that calculated by the meter.) Use the numeric 
keys to enter the desired value, and press 

[ENTER]

 to confirm the 

entry. If you have entered an invalid entry, the PT878 rejects the 
entry and displays an error message.

After you enter the spacing, pressing the [

S

] key returns the prompt to the 

Traverses box, and then to the Path tab at the top of the screen.