Davicom Cortex 320, Справочное руководство

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20 – SENSOR COEFFICIENTS
Virtual curve-fitting feature that allows compensation for gain, offset, inversion and even 2
nd
-order non-linearity of
input sensors. A is the 2 nd -order compensation, B is the gain (and inversion) while C is the offset. When D is 1, then
a base 10 Log is applied to calculate decibels. Default values are A=0, B=1, C=0 and D=0, giving a direct 1 to 1
relation between the measured voltage or current and the sensor’s output. Davicom has a sensor curve fitting utility
Excel file that can help you calculate the required coefficients. Please contact Davicom’s technical support
department for more information on how to obtain and use this file.
21 –
SIGNALLING ON – ALARM
Enables / disables alarming. When checked, any out-of-limit condition will automatically generate an alarm. When
unchecked, no alarm will be triggered when an out-of-limit condition occurs.
22 - SIGNALLING ON – RETURN TO NORMAL
Enables / disables Return To Normal signalling. When checked, a notification will be generated when the input
changes back to its normal state after an out-of-limit alarm condition. When unchecked, no notification will be sent
when the initial alarm condition returns to normal.
23 – SYSTEM LOG
Log the input’s activity in the System Log. Useful when inputs do not need to be logged, but are required for day-
to-day operation.
24 – HYSTERESIS - LOW LIMIT
Gap value which must be exceeded, when the input voltage returns from a low out-of-range state, before the input
can actually switch back to a normal state.
25 – HYSTERESIS - HIGH LIMIT
Gap value which must be exceeded, when the input voltage returns from a high out-of-range state, before the input
can actually switch back to a normal state.
26 –
REFRESH / READ
Refresh / read the screen content.
27 – SAVE / WRITE
Save the screen content.
28 – EXIT
Exit menu.