SMY133-SMY134-SMP133 Operating Manual
4. Detailed Description
4.1 Basic Functions
The instruments evaluate all of usual electric quantities like line-to-line and phase voltages, currents,
active, reactive and apparent powers, power factors, voltage and current THDs and harmonic
components, active and reactive energy, average power maximums, frequency etc. Furthermore,
temperature is measured with built-in sensor. Optionally, the second temperature can be measured
with an external Pt100 sensor at appropriate instrument models.
The instruments are fitted with inputs for connection of three voltage signals, three or four current
signals (for connection of external CTs with either 5/1 A
AC
or 0.1 A
AC
or 333 mV
AC
nominal secondary
signal) and separate AC/DC power supply input. They can be used in both low and high voltage power
grids.
The instruments feature three-rate tariff electricity meter with four-quadrant counters for both active
and reactive energies and maximum average active power ( maximum demand ) registration.
Advanced models store all results for actual and last month too and a separate archive dedicated for
automated meter readings can record actual status in preselected intervals.
Certain models can be used for residual current monitoring too.
The instruments are equipped with battery backuped real-time circuit (RTC) and high capacity „Flash"
type memory for measured data and events recording.
The USB 2.0 communication link can be used for the instrument adjusting and recorded data transfer.
For remote access, optional RS-485 or Ethernet or M-Bus communication interface is available. The
instruments with Ethernet interface have embedded webserver.
Basic specifications of the instrument can be set up by using the inbuilt keyboard and the display. With
the ENVIS program supplied as standard you can, via any of communication link, adjust the
instrument and transfer recorded data. In addition to the instrument adjustment, ENVIS program
allows you to display, view and archive the measured courses in the graphic form, as well as a
number of other features.
4.2 Manipulation and Setting
4.2.1 Data Area – Status Bar - Toolbar
Instrument's screen consists of two parts :
a data area
and
a status bar / toolbar area
.
After instrument's startup the status bar appears below data area as default. The status bar contains
following information :
15
Fig. 4.1: Data Area, Data Area, Status Bar, Toolbar
indicator
data area
toolbar
status bar
