Description Of Graph Screen Text Display Parameters; Hot Key Summary - Siemens SITRANS F Instruction Manual

Section 2
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
F Flow
VS Vs (m/s)
[ ] Display Metrics
Correlated Plot
Centroid Mark
D Damping
Tn Tn (usec)
dT Delta T (nsec)
S Signal Strength
SN Signal to Noise Ratio
Envelope Signature
Key Command Line
<+>
<->
<Left Arrow>
<Right Arrow>
<CLR>
<ENTER>
<MENU>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
<8> Hold Set
<0>
<=>
<F1> and <.>
Measured flow rate in selected flow units.
Sound Velocity in meters per second.
Represents the digital sample position of the receive window.
Displays the receive waveform in its proper superposition or registra-
tion. The true delta time will be displayed by NOT selecting "Corre-
lated Plot".
Indicates with a large vertical marker the peak energy of the receive
waveform.
Displays the minimum and maximum digital damping exponent along
with the active damping exponent.
Receive signal transit time in microseconds.
Transit time delta (difference) in nanoseconds.
Displays %Valc (amplitude), %Vaer (aeration factor) and numeric ALC.
Indicates the signal to noise ratio of the receive signal. Increased
damping will increase the S/N ratio as the asynchronous noise re-
duces.
Percentage change of the signal from Initial Makeup conditions.

HOT KEY SUMMARY

Expands (magnifies) waveform to view more detail.
Contracts waveform to view more or the waveform.
Shifts receive window to the left (waveform to the right).
Shifts receive window to the right (waveform to the left).
Brings waveform to the center of the screen.
Calls up Text Display menu items. <Left Arrow> to return to graph.
Exits the Graph Screen and returns to the main menu.
MinDamp Minimum damping exponent control (+ or - to increase or decrease).
MaxDamp Maximum damping exponent control (+ or - to increase or decrease).
TnSet Transit time adjustment (use + or - to move Tn marker).
ZCOSet Zero Crossover adjustment (use + or - to move crossover marker).
HiSet Signal envelope threshold level (use + or - to move threshold).
LoSet Signal envelope threshold level (use + or - to move threshold).
MaskSet Leading edge masking functions (use + or - to alter number of samples
masked).
Set this number higher if intermittant mis-registration occurs.
Exits the command line.
Toggle graph between receive waveform and envelope waveform.
Dumps the digitized waveform data over the RS232 port. You must first
leave the Graph Screen mode before invoking this command.
Description
Description
2-81
1010ENFM-3B