Lambrecht Ser[LOG], Руководство оператора

Страница: 85 / 129

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 85 of 129
7.4.2 Group-related area monitoring (AND operation)
The configuration of the group-related range monitoring is equivalent to the configuration of the "simple
range monitoring" described in chapter 7.4.1, however, a logical "AND operation" for 2 measuring
channels can be realized by a special selection of the measuring channels. To do this, the same
measuring channel must be selected for measurement channels 2 and 3.
This function can be used, for example, to implement wind direction dependent wind speed warnings
or frost warnings.
For the second measured value in the selection fields "Measuring channel 2" and "Measuring channel
3", 1 or 2 value ranges can be entered.
If only 1 value range is to be monitored, the same values must be entered for "Measuring channel 2"
and "Measuring channel 3" at "Minimum" and "Maximum" respectively. (See example "Area monitor-
ing wind speed AND wind direction (1 segment)" below.
If 2 value ranges are to be monitored, one value range must be entered for "Measuring channel 2" at
"Minimum" and "Maximum" and for "Measuring channel 3" the other value range must be entered at
"Minimum" and "Maximum". (See example "Area monitoring wind speed AND wind direction (2 seg-
ments)" below.
This assignment results in the following switching condition:
The switching process is triggered when the limit values of measuring channel 1 AND meas-
uring channel 2 OR measuring channel 3 are exceeded.
Example - Area monitoring Wind speed and wind direc-
tion (1 segment)
The relay signals that the wind speed limit value (S05) has
been exceeded only in a 45 to 315 degree segment when the
wind direction is northbound.
Note: For only one segment of the wind direction, the same
entries must be made in both fields.
Note:
The segment from "45 to 315 degrees around north"
goes above the zero point of the full circle. Since the minimum
numerical value must always be smaller than the maximum
numerical value, the switching logic "ON outside" must be set
here.
Example - Area monitoring Wind speed and wind direc-
tion (2 segments)
The relay signals that the wind speed limit value (S05) has
been exceeded only for wind directions around north or south
in segments of 315 to 45 degrees or 135 to 225 degrees.
Note: The segment from "45 to 315 degrees around north"
goes above the zero point of the full circle. Since the minimum
numerical value must always be smaller than the maximum
numerical value, the switching logic "ON outside" must be set
here. For the 135 to 225 degree segment, however, the
switching logic must be set to "ON within".