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1010PVNFM-3A
Section 2
Entering the Diagnostic Graph Screen
Before you can view the Diagnostic Graph Screen the 1010 flow channel must first be properly
installed and operating in a non-empty condition (refer to the appropriate 1010 Field manual).
If a previously installed channel is in a “Fault” condition, but not reporting “Empty”, you can
still access the Graph Screen to aid in troubleshooting the cause of the failure to measure
flow.
To view the Graph Screen first enter the [Test Facilities] menu, which is a submenu of the
main [Diagnostic Data] menu.
l Pressing the <Up/Down Arrows>, scroll to the [Graph] menu item.
l Press the <Right Arrow> to enter the [Graph] menu and scroll to highlight the [Yes] item
in the option list.
l Now press the <ENTER> key to access the Graph Screen.
l To exit the Graph Screen and return to the main menu, press the <MENU> key once.
Diagnostic Text Display
The text to the upper left-hand corner of the screen represents diagnostic items which can be
individually turned on or off to reduce unnecessary clutter on the screen. This text display
can be modified by pressing the <ENTER> key and scrolling up or down through the various
parameters that appear in the Graph Display menu. Pressing the <ENTER> key will select
the highlighted parameter (a “+” sign appears next to selected items) and pressing <CLR>
will deselect the item. Pressing the <Left Arrow> will return you to the graph screen with the
selected parameters appearing at the top left corner of the screen. (The figure above is shown
with all diagnostics items selected).
Time Base Control
The digitized receive signal can be moved either to the left or right on the screen by pressing
the <Left> or <Right> keypad arrows. The direction of the arrow actually represents the
direction in which the receive “window” will move, thereby causing the receive signal to shift
in the opposite direction on the screen (e.g., Pressing the <Left Arrow> moves the signal to
the right).
The digitized receive signal can be expanded or contracted in the time domain by pressing the
<+> or <-> keys on the keypad. This allows you to see the entire contents of the receive win-
dow, or zoom in to see greater detail. Pressing the <CLR> key once will automatically center
the receive signal on the screen. When zooming in on the receive signal small vertical “tick”
marks may appear. These marks represent the time at which the receive signal is digitally
sampled.
Correlated Plot
During conditions of flow, the actual transit time delta (difference) can be observed in the
displayed receive signal waveform when the [Correlated Plot] menu parameter is not selected.
To observe this time difference simply depress the <+> key (to see greater signal detail) until
the individual up and down receive signals are clearly discernible. To verify that the 1010
signal processing algorithms are properly correlating the up and down stream receive sig-
nals, select the [Correlated Plot] option from the display menu list.
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