SLC-220 User Guide Rev 2.0
June 2018
33
The SLC-220 processor is responsible for status/warning decision-making based on comparing
the existing sensor signal to the calibration and set point parameters that were programmed by
the user.
For example, “Oil Alarm” will be determined when sensor’s signal is more than
Water Calibration
minus
High Oil Delta
set point, and also less than
Water Calibration
minus
Oil Delta
set point.
Only one status is possible at a given time.
Calibration parameters
Water Calibration
and
Air Calibration
are the basic reference for every
decision-making. These two parameters should be entered once after seeing the measured
sensor signal when the sensor is dry (
Air Calibration
) and when the sensor is floating in clean site
water (
Water Calibration
).
All calibration parameters are positive numbers, in µA.
The following set points are in reference to
Water Calibration
:
•
Over range Delta:
Sensor signal above
Water Calibration
+
Over Range Delta
is
abnormal and indicates that the sensor either went under water or failed.
•
Oil Delta:
Sensor signal below
Water Calibration
–
Oil Delta
means oil detection. This is
the first oil alarm setting, for relatively thin oil layer detection.
•
High oil Delta:
Sensor signal below
Water Calibration
–
High Oil Delta
means high-oil
detection. This is the second oil alarm setting, for relatively thick oil layer detection.
Air Delta
is in reference to
Air Calibration
. This parameter ensures that when the sensor is not
floating on water or on oil, the indicated status will be AIR even if the sensor is not 100% dry.
Under Range Set Point
is an absolute parameter. It defines a minimum signal which is normally
expected from the sensor. If sensor signal is lower than this value, it the sensor failed.
In addition to the above parameters, there is a
Hysteresis
parameter that influences each
comparison of sensor’s signal to the other parameters and calibration points. The default value is
5 µA, and it adds a hysteresis of ±5 µA around each crossing point between two adjacent status
decisions.
Содержание ID-220 SERIES
Страница 2: ...SLC 220 User Guide Rev 2 0 June 2018 2...
Страница 4: ...SLC 220 User Guide Rev 2 0 June 2018 4...
Страница 6: ...SLC 220 User Guide Rev 2 0 June 2018 6...
Страница 12: ...SLC 220 User Guide Rev 2 0 June 2018 12...
Страница 36: ...SLC 220 User Guide Rev 2 0 June 2018 36...
Страница 64: ...SLC 220 User Guide Rev 2 0 June 2018 64 Setting a User through the LCD...
Страница 70: ...SLC 220 User Guide Rev 2 0 June 2018 70...
Страница 71: ...SLC 220 User Guide Rev 2 0 June 2018 71 9 Appendix A Installation in Hazardous Area...
Страница 72: ...SLC 220 User Guide Rev 2 0 June 2018 72...
Страница 78: ...SLC 220 User Guide Rev 2 0 June 2018 78...
Страница 82: ...SLC 220 User Guide Rev 2 0 June 2018 82 13 Appendix E SLC 220 Drawings...
Страница 83: ...SLC 220 User Guide Rev 2 0 June 2018 83...
Страница 84: ...SLC 220 User Guide Rev 2 0 June 2018 84...
