Siemens SITRANS FUP1010, Operating Instructions Manual, Page: 124 / 208

unstable flow, pulsating flow, low signal levels or high electronic noise it may be necessary to
override these default settings to permit uninterrupted and reliable flow measurement.
Test Facilities Graph Screen
The Graph Screen includes the capability to access a set of command codes, which enable a
user to override a number of default meter settings. The most important parameter is the digital
damping control, which can be accessed by pressing number <1> or <2> on the keypad while
in the Signal Graph Screen mode.
[MinDamp #] Command
Pressing the <1> key will cause [MinDamp #] to appear on the command line at the lower left-
hand corner of the screen. The number listed to the right of the command code represents the
exponent in the meter exponential averaging routine, where the larger the number the greater
the digital averaging. Pressing the <+> key will increase the damping value. Likewise, pressing
the <-> key will decrease the damping value.
To exit this mode, press the <0> key on the keypad.
[MaxDamp #] Command
Pressing the <2> key will bring up the [MaxDamp #] command. The function of this parameter
is similar to the [MinDamp #] command described above; however, the two parameters interact
in the following manner. The MinDamp value must not exceed the MaxDamp value, therefore
increasing the MinDamp value above the previous MaxDamp value will set both parameters
to the same value. In most cases, it is preferred that both damping parameters be set to the
same value, however, in cases where rapid response to changes in liquid sound velocity for
flow rate is required, the two values may be set differently. In this situation the meter will use
the MaxDamp value when conditions are stable, but then switch to a faster damping value
(limited by MinDamp) when a significant change in sound velocity or flow rate is perceived.
To exit this mode, press the <0> key on the keypad.
To access the Digital Damping Control using the Test Facilities Graph Screen, proceed as
follows:
Note
To use the Test Facilities Graph Screen you must have a working site.
Troubleshooting
10.3 Test Facilities Graph Screen
FUP1010 IP67 Portable Flowmeter
122 Operating Instructions, 02/2010, A5E02951522A Revision 01