The "sensor management" menu
157
11.1.2 "US sensor N" (N = 1 or 2)
(allocation of external inputs)
!
Note!
This submenu is only available for instruments with external inputs
(FMU90-********B***).
"temperature measurement"
Defines which temperature sensor is used for time-of-flight correction.
Selection:
• US sensor (default)
The integrated temperature probe of the ultrasonic sensor is used.
• external temperature
The external temperature probe is used (terminals 83 - 85).
• average US sens/ext.
The average temperature of the integrated and the external probe is used.
"external sensor control"
Determines if (and how) the sensor is controlled by an external switch.
Selection:
• off (default)
The sensor is not controlled by an external switch.
• hold
If the external switch sends a signal, the current measured value is held.
• value
If the external switch sends a signal, the distance assumes an user defined value (see the
"distance" parameter).
!
Note!
This parameter can be used to influence the measuring function of the instrument by an external
signal, e.g. in order to synchronize the measurement with very slow agitators.
!
Note!
• If additionally a level limitation has been defined, the upper and lower limits are defined by this
limitation even if the external input gives a signal.
• The external sensor control is disabled if one of the following functions has been configured:
– "level (LVL) N/extended calibration/LVL N ext. input M" (N,M = 1 or 2)
– "flow N/extended calibration/flow N ext. input M" (N,M = 1 or 2)
– "backwater/extended calibration/backwater ext. input M" (M = 1 or 2)
"input"
Determines which external switch input is used for the sensor control.
Selection:
• disabled (default)
• ext. digin 1 (terminals 71, 72, 73)
• ext. digin 2 (terminals 74, 75, 763)
• ext. digin 3 (terminals 77, 78, 79)
• ext. digin 4 (terminals 80, 81, 82)
⇒
US sensor 1 D1107
temp. measurement:
ext. sens. ctrl.:
input:
distance:
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