LOVATO ELECTRIC DMG200 Manual De Uso página 6

6
HOUR COUNTERS P GE
– The Hour counters page shows the following meters simultaneously:
• total hour counter (counts the power-on time of the device)
• partial hour counter.
– To clear counters it is necessary to access the commands menu.
– The hour counters page can be hidden completely if the general hour counter enable has been set to OFF (see hour counter menu).
TREND GR PH P GE
– The trend graph page allows to show the changes in the time domain of one measurement selectable among the following:
• verage equivalent voltage
• verage total active power
• verage total reactive power
• verage total apparent power.
– The default measurement is the verage total active power. To change the measurement, enter the dedicated menu parameter in the Trend sub-menu.
– It is possible to see on the graph the history of the last 96 values of the integrated measurement, each corresponding to an integration time interval.
– The default time interval is equal to 15 min, so the graph depth in time equals 24h.
– With the default factory setting, the trend graph shows the active power demand variation of the last day.
– The consumption data are lost when auxiliary power is removed from the DMG device or when the settings in the setup menu are changed.
– When the maximum storing capacity is exceeded, the newest data will overwrite the oldest, so that the most recent data are always shown.
– The vertical full-scale is calculated automatically, depending on the measurement selected and the highest value recorded.
1 - Time scale.
Indicates the time in the past (hh:mm)
to which the measurements are referred
2 - Vertical scale.
Can be autoranging or fixed
by the user.
3 - Measurement shown on graph
COMM NDS MENU
– The commands menu allows executing some occasional operations like reading peaks resetting, counters clearing, etc.
– If the dvanced level password has been entered, then the commands menu allows executing the automatic operations useful for the device configuration.
– The following table lists the functions available in the commands menu, divided by the access level required.
Cod. COMM ND
C.01 HI-LO RESET
C.02 M X DEM ND RESET
C.03 P RTI L ENERGY METER RESET
C.04 P RTI L HOUR COUNTER RESET
C.11 TOT L ENERGY METER RESET
C.12 TOT L HOUR COUNTER RESET
C.13 P R METERS TO DEF ULT
C.14 P R METERS B CKUP
C.15 P R METERS RESTORE
C.16 WIRING TEST
– Once the required command has been selected, press
– To cancel the command execution, press MENU.
– To quit commands menu, press MENU.
WIRING TEST
– The wiring test allows verifying if the connection of the DMG device has been done properly.
– To be able to execute the test, the device must be connected to an active plant, with the following conditions:
• Three-phase system with all phases present
• Current flowing in each phase > 1% of the CT primary.
• Positive flow of energies (that is a normal plant where the inductive load draws power from the supplier).
– To launch text execution, enter commands menu and select the required command per commands menu instructions.
– The test allows to verify the following points:
• Reading of the three phases
• Phase sequence
• Voltage unbalance
• Reverse polarity of each CT
• Mismatch between voltage and current phases.
– If the test does not succeed, the display shows the reason of the failure.
– If instead the test succeeds, then the condition is stored in the non-volatile memory, and a message that states the test passed is shown in the information page.
1 - Test sequence
2 - Test result
CCESS LEVEL DESCRIPTION
User dvanced
l l
Clears of HI and LO peaks of all readings
l l
Clears of Max Demand of all readings
l l Clears partial energy meters
l l Clears partial hour counter
l Clears total energy meters
l
Clears total hour counter
l
ll setup parameters are reset to factory default value
l
Saves a backup copy of all setup parameters
l
Restores the setup parameters to backup values
l
Carries out the wiring test in order to check proper wiring of the
DMG. See wiring test section.
to execute it. The device will prompt for a confirmation. Pressing
G
B
again, the command will be executed.