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Chapter 8. Servicing the PT878
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual 181
8.8.2 Setting up Peak Detection
The PT878 can use two different methods to identify the peak of the
received signal. In the “Peak” method, the peak is identified by testing a
derivative of the signal. In the “Threshold” method, the peak is identified as
the point where the signal crosses a threshold that is a percentage of the
maximum signal detected. The peak method is more reliable in identifying
the signal in dynamic conditions, while the threshold method is more
reliable in marginal signal conditions.
Note: Do not change the peak detection method or values unless
recommended by the factory.
From the Signal Parameter tab, press the [X] arrow key to move to the Peak
Detection tab. The window appears similar to Figure 120 below.
Figure 120: Peak Detection Window - Signal Setup Option
Signal Setup
Cancel
OK
Signal Para Peak Detect
Pulse/Code
Max Threshold
Min Threshold
25
75
Peak Detect Method
%
%
Peak
Threshold
Percent Peak
%
-40