fafnir SEPARIX-C L Plus, Technical Documentation Manual

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Page 19/37 SEPARIX-C/-T and SEPARIX-Control CT
5 Function test
For the function test of the SEPARIX-C L Plus interface sensors:
(1) First remove the interface sensor from the separator liquid.
(2) Clean the sensor (see section 3.3)
Water or watery dirt are removed 1 .
(3) Place the sensor on a dry and non-metallic surface.
As the sensor behaves in the same way in air as in light liquid, the measuring
transducer must trigger the appropriate alarm signal
3
after the adjusted alarm de-
lay time
2
set on the transducer (default setting 1 minute).
(4) As a counter check, immerse the interface sensor in water.
After expiration of the alarm delay time
2
(default setting 1 minute), the alarm sig-
nal at the measuring transducer must revert to its original state 3 .
For the function test of the SEPARIX-T L Plus high-level sensor:
(1) First remove the high-level sensor from the separator.
(2) Check the sensor for dirt and clean it if necessary (see section 3.3).
(3) To test the sensor, immerse it in water.
After the alarm delay time set on the measuring transducer
2
(default setting 1 mi-
nute), the appropriate alarm signal
3
must be triggered by the measuring
transducer.
(4) As a counter check, remove the high-level sensor from the water.
After the sensor has heated up again, the alarm signal at the measuring trans-
ducer must revert to its original state 3 . In addition to the alarm delay time set on
the measuring transducer 2 , it can take up to 2 minutes for the sensor to reheat,
depending on ambient temperature.
1 Whenever the sensor is removed from the separator, the sensor has been contaminated with wa-
tery dirt in the course of time. It is necessary to clean the sensor so that it responds quickly during
the test. Otherwise, depending on the degree of contamination, it could take several hours before
an alarm is triggered, i.e. until the water evaporates and the dirt has dried. The same applies if the
dirty sensor is immersed in light liquid. In this case, the light fluid has to displace the water from
the dirt first, which can also take several hours.
2
The measuring transducer delays the triggering and clearance of the alarm in order to prevent
false alarms caused by occasional wave movements or splash of fluids. The measuring transducer
configuration settings allow the alarm delay to be deactivated for test or demonstration purposes.
For normal operation, the alarm delay of the measuring transducer should always remain activated
in order to prevent false alarms.