Siemens SITRANS FUS1010 NEMA-4X/ IP 65 Entering the Diagnostic Graph Screen, Time Base Control

Section 2 1010NFM-3J

Entering the Diagnostic Graph Screen

Before you can view the Diagnostic Graph Screen the 1010 flow channel must first be properly in- stalled and operating in a non-empty condition (refer to the appropriate 1010 Field manual). If a previ- ously 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 [Diag- nostic Data] menu.

zPressing the <Up/Down Arrows>, scroll to the [Graph] menu item.

zPress the <Right Arrow> to enter the [Graph] menu and scroll to highlight the [Yes] item in the option list.

zNow press the <ENT> key to access the Graph Screen.

zTo 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 individu- ally turned on or off to reduce unnecessary clutter on the screen. This text display can be modified by pressing the <ENT> key and scrolling up or down through the various parameters that appear in the Graph Display menu. Pressing the <ENT> 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 window, 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 signals, select the [Correlated Plot] option from the display menu list.

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