HT instruments VEGA78 - Manual (Page 61)

VEGA78
EN - 59
CAUTION
For recordings ALWAYS use the external power supply even though the
instrument allows the operator to perform a recording using internal
batteries.
After starting a recording a preliminary real time evaluation about the situation on electrical
installation it’s important in order to perform a correct settings, using the predefined
configurations (see § 5.4.9) if necessary.
The below warning message can be shown by meter after pressing of GO/STOP key:
Warning
Too many selected parameters
Fig. 106: Warning message of too many selected parameters
In this case of too many parameters were selected it is necessary to disable them inside
“Recordings Settings” section in order to start a correct recording.
After pressing GO/STOP key a possible warning message window is shown by meter.
Inside this window message the internal item can be different as for type and number. This
warning message, which does not block the recording start, is important for user to correct
possible errors performed during meter’s setting:
Warning
Missed external adapter
Wrong phase sequence
Negative active powers
Wrong Vref voltage anomalies
Ok Cancel
Fig. 107: Warning message errors screen
Below the meaning of the above s of warning windows screen:
Type of error Description
Missed external adapter
Connect the external adapter to meter before start
recording
Wrong phase sequence
The value of “SEQ” parameter in Real Time Values
section (see § 5.2.1) is different from the correct
“123”. Check the phase sequence value of V1, V2, V3
voltages
Negative active powers
One or more values of P1, P2, P3 Active Powers is
negative (see § 5.2.1). Reversing if necessary the
transducer clamps of 180 degrees on phase cables in
order to obtain always positive values (except
cogeneration cases)
Wrong Vref voltage anomalies
The nominal reference voltage value for voltage
anomalies is not compliance to the type of selected
system (see § 5.4.7)
Table 11: Description of errors before start a recording