Page 8 Quick Reference Manual
3 Alarm settings and nominal values
Every measurement has a "Allowed deviation" value. This is how much the value can change from
the nominal value before triggering an alarm if alarms are activated. It is also the threshold where
the measurement goes from green to red in a spider panel.
The "allowed deviation" value can either be specified as a percentage of the nominal value, or an
absolute value deviation (eg. 10 meters).
3.1 Set nominal values
When all measurements have stabilized during towing, and you are satisfied with
the positioning, depth etc. you can press the "Set nominal" button. This will set all
measurements nominal value to the current value. From that point, any deviation
from the nominal value will be shown in the spider panels, and trigger alarms if it
exceeds its allowed deviation and the alarm is activated.
3.2 Turn the alarm system on and off
In the top left there is a beacon light icon. Press this to globally enable or disable the alarm system.
When disabled no alarms will be given when measurements are beyond their alarm
threshold. This can be used in the shooting or hauling phase, when all values are expected
to change a lot.
When enabled, alarms will be given when a measurement which has the alarm setting
enabled exceeds its threshold.
3.3 Set the allowed deviation and enabling alarm
Right click a measurement box and select "Alarm settings". This will bring
up a menu with the measurements, the allowed deviation, and a
checkbox to enable or disable alarm for the given measurement.
Change the "Allowed deviation" and unit to set the point where the
alarm will trigger. This will also be the point where the value in a spider
panel will change from green to red.
Check or uncheck the "Alarm Settings Enabled" checkbox, to enable or
disable the deviation alarm for a given measurement. When enabled the
value in the measurement box will turn red when the value is outside of
its limits.
Note: You can set an allowed deviation without enabling the alarm if you just want to see the
changes in a spider panel
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