CARLO GAVAZZI WM23-96 - PROGRAMMING User Manual page 20

tiples are automatically selected by the instrument accord-
ing to the selected VT and CT values;
• HiE: (maximum electrical scale) 100.0 K; the K and M
multiples are automatically selected by the instrument
according to the selected VT and CT values;
• LoA: (minimum electrical scale of the analogue output)
20.0% for 4mA, the calculation to be carried out is: (mini-
mum output value/ full scale output value)*100 =
(4mA/20mA)*100 = 20%
• HiA: (maximum electrical scale of the analogue output)
100.0% for 20mA, the calculation to be carried out is: (max-
imum output value / full scale output value)*100 =
(20mA/20mA)*100 =100%
Example 2 "Use of digital filter": it's necessary to stabilize
the displayed value of the VL1-N variable that
between 222V and 228V. The parameters of the digital filter
are to be set as follows:
• rnG: the variable varies within the average value, the
amplitude of which is equal to ±1.3% of the variable's rated
value, calculated as follows:
(228-222)/2=±3V, then ±3*100/231V=±1.3% where 231V
is the phase-neutral rated value of a 400V input range). The
"range" parameter, that corresponds to the action range of
the digital filter, is set at a value which is slightly higher than
the percentage amplitude of the fluctuation: e.g. 2%.
• CoE: if the new value acquired by the instrument is with-
in the filter's action range, then the new displayed value is
calculated by summing algebraically to the previous value
the variation divided by the filtering coefficient. As a conse-
quence, a value which is higher than this coefficient implies
a longer settling time and therefore improves the stability.
The latter can also be improved by increasing the filtering
coefficient: the admitted values are within 1 and 16. Enter the
value in consecutive attempts until you reach the desired
stability.
Reset min and max values
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Useful Information
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varies
Mounting
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