Siemens SITRANS L Руководство по эксплуатации - Страница 27
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6.7
Speed of response
The speed of response adjustment allows the user to collectively set a number of operating
parameters.
measurement response: is the limit to which the SITRANS LU180 will be able to keep up
agitator discrimination:
filter:
fail-safe timer:
SP
1*
2
3
4
* = factory setting
SITRANS LU180
Operating Instructions, 09/2021, A5E37100674-AB
with rates of change. If the unit's measurement cannot keep up
with the rate of level change, set the adjustment from '1' to '2'. If it
still cannot keep up with the rate of level change, set the adjust-
ment option to '3'. Avoid choosing an option that is too fast for
your application.
discriminates between agitator blades in motion, and the material
(target) surface.
discriminates between false echoes from acoustical and electrical
noise, and the material (target) surface.
establishes the 'Waiting' period from the time a loss of echo or
operating fault condition starts, until the fail-safe default is effect-
ed. Adjusting the speed of response will set the fail-safe timer to
the default values in the chart. If a different response is required,
adjust the 'FSt' option (Fail-safe (Page 28)).
measurement response
1 m/min (3.3 ft/min)
5 m/min (16.4 ft/min)
immediate
0.03 m/min (0.1 ft/min)
agitator discrimination
on
on
off
on
Operating
6.7 Speed of response
filter
fail-safe timer
on
10 minutes
on
3 minutes
off
3 minutes
on
10 minutes
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