Samson 3730 Series Operating Instructions

54 EB 8389-1S EN
Leakage sensor
9.1 Start-up of the leakage
sensor
To be able to use the full scope of functions,
the response of the leakage sensor to stan-
dardized conditions and to the prevailing
process conditions must be measured. Fur-
thermore, the limit to activate the alarm must
be entered.
9.1.1 Manufacturer reference
The manufacturer reference (u Fig. 10) mea-
sures the response of the leakage sensor. We
recommend performing the manufacturer
reference test. On request, it can also be
performed by SAMSON and must not be
performed again. In this case, the standard
conditions are:
• Medium = air
• Input pressure = 4 bar
• Output pressure = atmosphere
Default values of alarm limits are A2 = 15
dB and A3 = 25 dB. If the leakage sensor
has been tted later onto the valve, the
alarm limits must be manually congured
or adjusted by performing a manufacturer
or process reference test before the leakage
sensor can be used. See u Section 9.1.2.
While the manufacturer reference test is run-
ning, the parameters listed below are auto-
matically deactivated:
− Activate CLOSED end position
− Activate ramp function
Phase 1: The valve moves to eleven dened
set points one after the other. After reaching
a set point and after the 'Settling time before
sound level measurement' has elapsed, the
leakage sensor measures the sound pressure
level.
If the difference between two neighboring set
points is larger or equal to the adjusted 'Sen-
sitivity sound level', the valve does not move
to the next set points. Instead, Phase 2 starts.
Phase 1 successful: The sound pressure level
exceeded the adjusted 'Sensitivity sound level'
(10dB) between set points 4 and 5. Phase 2
starts.
If the 'Sensitivity sound level' is not reached
after the valve has moved to all eleven set
points, the test is canceled. The canceled test
is logged with a time stamp. The 'Test infor-
mation' reading indicates 'Test failed: sound
level change too small'.
Phase 1 not successful: The difference in sound
pressure level between two neighboring set points
is smaller than the 'Sensitivity sound level'
(10dB). The reference test is canceled.

Samson 3730 Series Specifications

General

Brand	Samson
Model	3730 Series
Category	Valve Positioners
Language	English