Siemens SITRANS FUS1010 NEMA-4X/ IP 65 manual Signal Masking Function Hot Key, HOT KEY Summary

Section 2 1010NFM-3J

Signal Masking Function: (Hot Key 7)

Under conditions of extremely low signal amplitude, a noise spike associated with 1010’s receive signal window may be present on the extreme left side of the graph display. If this spike is large enough it may interfere with the signal detection routines. To eliminate this noise from the signal processing routines, press the <7> key to invoke the [MaskSet] command, then press the <+> key until the noise is no longer present in the receive waveform. Press <0> to exit this command.

DESCRIPTION OF GRAPH SCREEN TEXT DISPLAY PARAMETERS

Screen Text
Parameters	Menu List item	Description
F	Flow	Measured flow rate in selected flow units.
VS	Vs (m/s)	Sound Velocity in meters per second.
[ ]	Display Metrics	Represents the digital sample position of the receive window.
	Correlated Plot	Displays the receive waveform in its proper superposition or registra-
		tion. The true delta time will be displayed by NOT selecting “Corre-
		lated Plot”.
	Centroid Mark	Indicates with a large vertical marker the peak energy of the receive
		waveform.
D	Damping	Displays the minimum and maximum digital damping exponent along
		with the active damping exponent.
Tn	Tn (usec)	Receive signal transit time in microseconds.
dT	Delta T (nsec)	Transit time delta (difference) in nanoseconds.
S	Signal Strength	Displays %Valc (amplitude), %Vaer (aeration factor) and numeric ALC.
SN	Signal to Noise Ratio	Indicates the signal to noise ratio of the receive signal. Increased
		damping will increase the S/N ratio as the asynchronous noise re-
		duces.
	Envelope Signature	Percentage change of the signal from Initial Makeup conditions.

			HOT KEY SUMMARY
	Key	Command Line	Description
<+>			Expands (magnifies) waveform to view more detail.
<->			Contracts waveform to view more or the waveform.
	<Left Arrow>		Shifts receive window to the left (waveform to the right).
	<Right Arrow>		Shifts receive window to the right (waveform to the left).
	<CLR>		Brings waveform to the center of the screen.
	<ENTER>		Calls up Text Display menu items. <Left Arrow> to return to graph.
	<MENU>		Exits the Graph Screen and returns to the main menu.
<1>		MinDamp	Minimum damping exponent control (+ or - to increase or decrease).
<2>		MaxDamp	Maximum damping exponent control (+ or - to increase or decrease).
	<3>	TnSet	Transit time adjustment (use + or - to move Tn marker).
<4>		ZCOSet	Zero Crossover adjustment (use + or - to move crossover marker).
<5>		HiSet	Signal envelope threshold level (use + or - to move threshold).
	<6>	LoSet	Signal envelope threshold level (use + or - to move threshold).
<7>		MaskSet	Leading edge masking functions (use + or - to alter number of samples
			masked).
<8>		Hold Set	Set this number higher if intermittant mis-registration occurs.
<0>			Exits the command line.
<=>			Toggle graph between receive waveform and envelope waveform.
	<F1> and <.>		Dumps the digitized waveform data over the RS232 port. You must first
			leave the Graph Screen mode before invoking this command.

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