ControlByWeb X-320m, Руководство пользователя

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Installation and Setup X-320M™ User's Manual
Units
This drop-down allows you to specify the units of measure for the wind speed sensor. The units
selected will be determined by the Slope and Offset used to calibrate the sensor. The following
options are available:
-
mph: This option is used if you are measuring the wind speed in miles per hour.
-
km/h: This option is used if you are measuring the wind speed in kilometers per hour.
-
m/s: This option is used if you are measuring the wind speed in meters per second.
-
knots: This option is used if you are measuring the wind speed in knots.
High Alarm
This setting is used to set the trigger point for a high alarm condition. The alarm is triggered when
the value at the sensor exceeds the High Alarm Value. The default High Alarm is
20
.
Low Alarm
This setting is used to set the trigger point for a low alarm condition. The alarm is triggered when the
value at the sensor drops below the Low Alarm Value. The default Low Alarm is
10
.
Deadband
The Deadband prevents alarms from triggering excessively when the sensor measurement
vacillates around the trigger point.
With High Alarms, the measurement must fall below the High Alarm point minus the Deadband
before the High Alarm will be triggered again. Likewise the Deadband on the Low Alarm requires the
measurement to rise above the low alarm point plus the Deadband before the Low Alarm will be
triggered again.
For example, if the Deadband is set to 5 mph, and a High Alarm occurs at 50 mph, the alarm will not
trigger again until the wind speed first drops below 45 mph (50 mph - 5 mph), as shown in the figure
below. The default Deadband is
0.50
.
Page 58 Xytronix Research & Design, Inc.
Figure 2.4m - Wind Speed Alarm Deadband