Samson 3730-3 Operating Instructions Manual page 101

compared to the alarm limits. Which mean
sound level is to be used for comparison can
be selected in 'Alarm release':
− Average of current/last tight-closing:
The mean value calculated from the cur-
rent sound level and from the last four
sound levels measured while the valve is
tightly shut is used for monitoring
(Fig. 18: Tight-closing event 31 and
sound level E to I).
− Average of current/last tight-closing:
The mean value calculated from all
sound levels measured while the valve is
tightly shut is used for monitoring
(Fig. 18: Tight-closing event 31 and
sound level A to I).
− Moving average short-term histogram:
The mean value calculated from the last
30 sound levels measured during short-
term monitoring (see section 7.2) is used
for monitoring (Fig. 18: Tight-closing
event 2 to Tight-closing event 31 with all
sound levels).
− Moving average long-term histogram:
The mean value calculated from all the
sound levels measured during long-term
monitoring (see section 7.3) is used for
monitoring (Fig. 18: Tight-closing event 1
to Tight-closing event 31 with all sound
levels).
The 'No alarm release' setting deactivates
the alarm function.
EB 8389 EN
Defining parameters
1. Define alarm parameters.
2. Select classification for status messages
(see section 7.1.2.3).
Diagnosis > Leakage detection > Repetition
test
1. − Alarm release: [No alarm release], Average
of current/last tight-closing, Average level at
tight-closing, Moving average short-term
histogram, Moving average long-term
histogram
− Select alarm limits
(reference test], Alarm limit of repetition test,
User-defined alarm limits
Types 3730-2/-3/-4/-5 (1.5x) and Type 3731-3:
Settings > Positioner > Error control >
Classification report > Extended > Inner
leakage
2. − Alarm limit 2 exceeded:
[ ], , ,
− Alarm limit 3 exceeded:
[ ], , ,
Type 3730-5 (1.6x) and Type 3731-5:
Settings > Positioner > Diagnosis
configuration > Classification
2. − Inner (seat) leakage: [
On selecting the alarm limit 'User-
1)
defined', we recommend checking the
correct setting of the alarm limits using an
operating time of one to three months
based on the measured data in 'Level'
diagram (see section 7.4).
Leakage sensor
: [Factory setting
1)
,
,
], , , ,
101