CARLO GAVAZZI VMU-C EM, Инструкция по эксплуатации

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VMU-C
VMU-C Instruction manual 88

The list of all the names assigned to the energy meters included in VMU-C
EM; when selecting an individual meter, only the relevant curve will be
displayed.
 The “ALL” item, allowing to simultaneously display all the energy meters
configured and existing in the plant.
 The “EM_VIRTUAL” item displays the data associated with the virtual
instrument, which, depending on the configuration page settings, represents
the sum of two or more real instruments (or anyway of all the instruments for
which the check box “contribution to the virtual instrument” has been enabled.
Note: comparing the trends of the measurements of the different energy meters
allows to easily identify any anomalies in the consumptions of the individual
plant instruments.
Note: all keys and selections outside the dark grey area do not need the
“Refresh chart” function. After a few moments the chart will refresh
automatically.
B.
“Section B” contains the charts (on the BOTTOM)
On the abscissa axis (X) the chart displays the time references; the resolution
(hours, days, months) depends on the selected display type (daily, monthly,
yearly). On the ordinate axis(Y) the chart displays the power value in kW or the
energy value in kWh, with an automatically sized scale (with auto-range
function).
In the top left of this section there is a menu allowing to select the graphical
display mode: "Line" (a continuous line) or "Bar" (for histograms).
On the abscissa axis (X) the chart displays time; the resolution (hours, days,
months) depends on the selected display type (daily, monthly, yearly). On the
ordinate axis (Y) the chart displays power in kW or energy in kWh, with a scale
automatically sized according to the plant peak power.
Note:
we recommend that you use the “Line” or “Area” display for the daily
Power data and the “Bar” display (for histograms) for the monthly and yearly
energy data.
6.2 COUNTERS (GENERIC FROM DIGITAL
INPUTS)
Hovering the mouse cursor on “COUNTERS” and then clicking on the “ENERGY
METERS” item will grant access to the generic meter screen (counting the pulses
collected by the digital inputs of the Energy meters installed on the system, Fig. 98).
Generic cou
nter (H2O, GAS, …) access selection