Detection Modes; Test Facilities Graph Screen - Siemens SITRANS F Operating Instructions Manual

Section 2

Detection Modes

System 1010 flowmeters, Version 3 or higher, are equipped with a Test Facilities Graph Screen. The
following paragraphs explain how the Test Facilities Graph Screen is used for troubleshooting System
1010 flowmeters.
The Test Facilities Graph Screen
NOTE: The following is intended for 1010 VFMT systems with Graphic Displays only. For VFMT
capable 1010X systems (with or without digital displays) or 1010N blind systems, the
digital receive signal can only be viewed as a text dump over the RS-232 output (i.e., by
pressing the [F1] key and then the period key [.] ). Access to the digital damping param-
eters can be found in the [Site Setup] menu cell of the Diagnostic Data menu. Refer to
the appropriate System 1010 field manual for details.
When operating in the transit time mode the Test Facilities Graph Screen is an exceptional diagnostic
tool for troubleshooting problem applications or simply determining receive signal quality. The primary
function of this screen is the display of the digitized receive signal waveform with similar appearance
and function of a digital oscilloscope. This screen also allows the user to override some of the 1010
default settings by permitting adjustment to the measured transit time, the digital averaging and the
zero crossover used in the measurement of the up/down transit time difference. The figure shown on
the next page is a representation of the 1010 diagnostic graph.
NOTE: The Test Facilities Graphic Screen requires significant CPU overhead. The 1010 meter
should not be left in this mode during normal operation, where the Datalogger is the
primary output, or during calibration work.
F 0.73
VS 1469.73
[ ] 1691:1929 476
D 4:4 4
Tn 55.06 55.06
d T 3.11
S 72 1
SN 124:1
CQ 17:1
Command Line appears here
91
3
TN marker
Digitized Receive Signal
Crossover Marker
2-67
1010PFM-3G