Chapter 3. Programming Site Data
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual 41
3.6.2 Path Parameters for Wetted Transducers
If you are using wetted transducers, the PT878 path menu includes the
following set of parameters:
•Path Length
•Axial Length
1. The meter first prompts for the path length (P) of the ultrasonic signal.
GE has calculated the path length based on the transducer configuration
for your particular application. Find the path length on the flowcell or
on other supplied documentation.
a. Press [ENTER] to enter the text box.
b. Use the numeric keys to enter the appropriate number.
c. Press [ENTER] to confirm the entry.
Note: If the documentation does not supply the path or axial lengths, refer
to Appendix B, Measuring P and L Dimensions, to measure these
lengths.
2. The next prompt asks for the axial dimension (L) of the ultrasonic
signal. Again, GE has calculated the axial dimension based on the
transducer configuration for your particular application. Find the axial
dimension on the flowcell or from other supplied documentation.
a. Press [ENTER] to enter the text box.
b. Use the numeric keys to enter the appropriate number.
c. Press [ENTER] to confirm the entry.
After you enter the axial length, press the [S] key to return to the main Path
tab at the top of the screen.
•To confirm the entries and return to Operate Mode, press [F3] (OK). The
PT878 returns to Operate Mode.
•To leave the window without confirming the entries, press [F2] (Cancel)
or the [ESC] key. The PT878 returns to Operate Mode.
•To scroll to other windows, press the [W] or [X] key.