Samson 3730-3 Operating Instructions Manual page 92

Leakage sensor
Reference test
Level (x)
diagram
ß
Phase 3
Reset 'Reference test'
92
Prerequisites
– Positioner accessories identification: Leakage sensor
– Enable set point cutoff decrease: On
Settling time before level measuring
à
Measured points of activation level
ß Not successful
â
Alarm settings
Select alarm limit
Status classification (NE 107)
Alarm limit 2
exceeded
x [%]
0
Mean sound level
exceeds alarm limit 2
â
Analysis (NE 107)/
logged by operating hours counter
Inner (seat) leakage
Reset 'Leakage detection – Repetition test'
â
Repetition test
with process conditions
â
â
â
Start
ß Successful
Phase 2
Successful
â
ß
Alarm limit 3
exceeded
Determining the mean sound levels while the valve is
tightly shut
Cyclic analysis of sensor level, e.g. over dynamic
HART ®
t [s]
Mean sound level
exceeds alarm limit 3
â
â
á
Activation level
lower than
á
Stop
â á
Phase 1
â
Reset 'Repetition test'
variables (see section 6)
EB 8389 EN
User-defined
â
Alarm limits 1,
2, 3
Recommended:
10 dB, 15 dB, 25 dB