Omicron DANEO 400, User Manual

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DANEO Control
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4. In the Binary settings, enter the debounce and deglitch time for all binary inputs
(0
…
500 ms).
5. Select the input type, which can be an analog or binary input, see details below.
6. Assign a descriptive name to the input.
7. An analog input can be configured for measuring voltages or for measuring currents:
Analog voltage input
Analog current input
Choose a range that covers the maximum expected voltage at the input. The range refers to the
RMS value of a sinusoidal voltage. For further details, refer to section
“Technical data”
on page
63.
The conversion factor is for the correct calculation of the primary quantities from the measured
voltage. See the examples below on how to derive the conversion factors.
8. For binary inputs, choose the binary input type:
Po
tential sensing for externally “wetted”
contacts
Internally “wetted” for sensing potential free (“dry”
) contacts
9. For a potential sensing input, choose the appropriate voltage range and threshold.
10.
Configure the phase systems by choosing their type and entering a name. The type “None”
means that the phase system is not used. The phase systems are filled up automatically by
using the voltage and current inputs from left to right (input numbers 1 to 10).
Calculating conversion factors
All quantities for observation, recording, and analysis are treated as primary quantities within
DANEO 400 and DANEO Control. At the analog inputs of DANEO 400, only voltages are measured,
which
are a proportional “
image
”
of the primary quantities. Depending on the instrument transformers
and/or sensors used, these voltages cannot even be always called secondary quantities in the
classical sense.
To convert the measured voltages
into the corresponding primary quantity , the conversion
factor has to be set correctly (the letter is not to be confused with reactive power in this context).
The conversion factor is the ratio of the primary quantity to the measured voltage at the analog inputs:
Or, in other words, the measured voltage is to be multiplied by the conversion factor to obtain the
primary quantity :
For an input configured as a voltage input, the conversion factor is a dimensionless number, in the
use
r interface displayed with the “
unit
”
.
For an input configured as a current input, the conversion factor is a conductance, in the user interface
displayed with the unit
.