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Chapter 3. Programming Site Data
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual 65
3.11.1 Entering Correction Factors
The final option in the Program Menu, Correction Factors, allows you to
enter and modify three correction factors: Reynolds Correction, Kinematic
Viscosity and Calibration Factor. To enter the Correction Factors option,
scroll to the Correction Factors entry on the Program Menu and press
[ENTER]. The screen appears similar to Figure 35 below. To step through
each parameter, press the [T] key. Refer to Figure 152 on page 236 of
Appendix A, Menu Maps.
Figure 35: Reynolds Correction Window
3.11.2 Entering Reynolds Correction
The default for Reynolds Correction is “On.” This correction factor should
be on in most applications, including all those that utilize clamp-on
transducers. It makes a small adjustment to the flow rate reported by the
PT878, based on the Kinematic Viscosity. Reynolds Correction is necessary,
as the velocity of the fluid measured along a diametrical path must be
related to the total area average velocity over the entire pipe cross-section.
Reynolds Correctio
Inputs
Correction Factors
Cancel OK
Calibration Factor
Re Correction
On
Off
K/V (v)
m
3
/s
Data Source
K/V Factor
Single
Table
Edit Table
10