Siemens SITRANS F M TRANSMAG 2, Руководство по эксплуатации, Страница: 49 / 114

Functions
7.4 Function Group Measuring Functions
SITRANS F M TRANSMAG 2
Operating Instructions, 11/2009, A5E00102775-07
47
specified % value refers to the set full scale value), the device operates with a filter time
constant of 10 s.
This applies for the suppress time set in menu item 3.1.7.3. If a greater deviation occurs
during this time, the time starts again from the beginning. If a disturbed signal is applied
continuously, the device remains set to the greater filter time constant until the
unattenuated measured values are back within the selected tolerance band. The device
switches back to normal mode at the end of time "t" after the last detected deviation.
● Slurry mode, menu item 3.1.8
For media with a high solids content, magnetically conductive solids or air locks, the
stability of the measured values can be significantly improved with this setting, while the
reaction speed remains the same when the flow is altered.
If necessary, the stability of the measured value can be further increased using the "Filter
time constant" (menu item 3.1.7.1) or "Error blanking" functions, although this will in turn
reduce the measuring dynamics.
}
+
-
t t t
① Unattenuated measuring variable
② Time
③ Tolerance band
④ t = suppress time