Siemens SITRANS F M TRANSMAG 2, Руководство по эксплуатации, Страница: 85 / 114

Parameters
SITRANS F M TRANSMAG 2
Operating Instructions, 11/2009, A5E00102775-07
83
3.1.5.1 Flow Direction Main flow direction related to direction
arrow on measuring tube (= forwards,
positive flow values)
+Direction
•
+Direction,
•
-Direction
3.1.5.2 Meas.Direction Output of suppression of reverse flow
Affects all outputs, totalizers and display
forw.+rev.
•
forward only,
•
forw.+rev.
3.1.5.3 Hysteresis Hysteresis of detection of flow direction in
% of full scale value
0.2 % 0 to 20 %
3.1.6 Low flow cut Threshold for low flow cut in % of full
scale value 1, 2 or absolute value in flow
unit 3
1 % 0 to 20 %
3.1.7 Noise filter
3.1.7.1 Fltr.Time Con. Time constant τ for measured value
attenuation; after a jump in
the measuring variable, the output
measured value reaches about 99% of
the new setpoint after 5*τ
Does not affect totalizers.
3.00 s 0.0 ... 200.0 s
3.1.7.2 Line Synchron. Auto mode not available
3.1.7.3 Noise Suppress
Suppress Time
Suppress Limit Values outside a tolerance range are
evaluated for the duration of the blanking
time with high attenuation.
Time of effect of increased attenuation (0
s = blanking off)
Tolerance range = floating a
tolerance value
0 s
0 %
0 ... 100
0 ... 100
3.1.8 Slurry mode This is used when signals are severely
impaired, e.g. for media with a high solids
content or air locks
Off •
On
•
Off
3.2 Total. Forw. Totalizer forwards
3.2.1 Set forward Reset totalizer to zero and stop or start Cancel 1,2
Totalize 3 •
Cancel 1,2,
•
Reset+Stop,
•
Reset+Start 1,2,
•
Totalize 3
3.2.2 Engr. Unit Engineering unit of volume
or
Engineering unit of mass When you select
a unit of mass, entry of the actual medium
density is mandatory (menu 3.1.4)
DN 2...12: l
DN >12: m
3
•
l, hl, m
3
, Ml, ft
3
, Gal,
MGal, ImpGal,
MImpGal
•
kg, t, g, lb
3.2.3 Alarm Limit +1000000 l -108 ... +108
3.3 Total. rev. Totalizer reverse
3.3.1 Set reverse Reset totalizer to zero and stop or start
Cancel 1,2
Totalize 3
•
Cancel 1,2,
•
Reset+Stop,
•
Reset+Start 1,2,
•
Totalize 3