*
Archive Starts at, Immediately
- Determines whether to begin recording immediately after the
instrument is powered on or at a preset day and time.
*
Archived Quantities
- In this section you can choose the set of quantities that you want to record.
Column
AVG
tick the required quantity and a record will contain the average values per logging
interval. If you want to record the maximum and minimum values of the measuring cycle (see
explanation below) during the recording interval, check the appropriate box in column
MIN,
MAX
. The powers in column Import/Export can determine whether to store import and export
respectively inductive or reactive load sums separately.
*
Harmonics
- You can choose voltage and/or current harmonics to be recorded. You can select
also, if only odd or all harmonics should be recorded and choose maximal harmonic order. Last
option enables angles of harmonics to be included in archives.
*
The dialog also shows the estimated capacity of the main archive with the actual configuration
(
Estimated Record Time
).
–
Electricity Meter (fig. 5d)
- For settings belonging to measurement of electrical energy. In addition
to two tariff, three-phase, four quadrant electric energy, this unit records the maximum and average
of active power.
*
Record Period
- The period of recording of the electricity meter status (automatic meter reading).
*
Tariff Control
- Set type of tariff control. You can choose from a tariff table or an external digital
input for tariff switching.
*
Tariff Table
- This table can set a daily tariffs for three different prices per hour. The energy will
be registered separately for each tariff.
*
Currency Code
- You can set a local currency code.
*
Conversion Rate
- You can provide a cost of 1 kWh in different tariffs, so than you are able to
optionally see prices of an imported (or exported) energy in a local currency instead of direct
energy values.
*
Window Type, Window Length
- Method of an averaging of the average active power P
AVGMAX(E)
.
You can choose a fixed window (Fixed) or a floating window (Floating). In addition, you can set
the length of averaging window.
–
Input/Output (fig. 5e)
- The SMC 144 is always equipped with two alarm LEDs (
LED A1
,
LED A2
)
and optionally one relay or impulse output (
O1
).
*
You can set a function, that controls each output by selecting the
Standard output
option. Com-
plex conditions can be set by using up to four events/conditions (
E1
through
E4
), which can
be in conjunction and/or disjunction. Character of an output can be selected as
Permanent
or
Pulse
. In the latter case, duration of the whole period and the active part of period can be set.
*
Also, you can set any output to behave as a standard electricity meter output by selecting the
Elmeter output
option. In this case, you can select whether you want active or reactive energy
output and import or export. Also, number of
pulses/kWh
must be set properly.
To commit changes in any of the above parameters it is required to send these new values into the instrument
using the
Send
button. Settings can also be backed up into the file for later use with the
Save
button.
It is also recommended to check the status of the internal clock in the device. In the
Info
tab open the
Instrument Time
window (figure 5f). The program reads the current time set in your device and displays it.
It also displays the difference to the actual PC time (
Time Difference
). If the time in the instrument varies
significantly, it can be adjusted by selecting the
Set Time from the PC
option.
The necessary crucial device settings is than done — disconnect the communication cable and SMC 144 is
ready to be connected to the measured network.
2.3
Installation
Natural air circulation should be provided inside the distribution board cabinet, and in the instrument’s neighbor-
hood, especially underneath the instrument, no other instrumentation that is source of heat should be installed
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