49
= Key1
= Key 2
= Key 3
= Max. value or consumption = Min. value or supply
Net frequency
The net frequency is determined from the measure-
ment voltage within the UMG 505. From the net fre-
quency the scanning frequency for the current and
voltage inputs is calculated.
For measurements with very distorted voltages, the
frequency of the voltage fundamental cannot exactly
be determined any longer. Voltage distortion occurs
in measurements at consumers, which are driven
with phase changing controllings.
For highly distorted measurement voltage, the
corresponding net frequency should be program-
med.
Distortion of the current does not affect the determi-
nation of the frequency.
Without measurement voltage, no net frequency can
be determined, and no scanning frequency can be
calculated. Voltage, current and all resulting values
are not calculated and indicated with zero.
If the current should be measured without measure-
ment voltage, the net frequency must be program-
med at UMG 505.
The determination of the net frequency can be
carried out automatically or as a fix frequency.
The following settings for the determination of the
frequency are at your disposal:
"
Auto
"
Automatical frequency
"
50
"Hz
Fix frequency
"
60
"Hz
Fix frequency
The proceeding for the determination of the frequen-
cy can be called up and changed in the menu
CONF
.
Select
In menu
CONF
you
can scroll to the indi-
cation of the frequen-
cy determination
using
key 3.
In this example, the
frequency is determi-
ned automatically.
Change
Using
key 1, the de-
termination of the
frequency is se-
lected, and the text
"Auto" flashes.
In the indication, the
text
EDIT
appears.
Using
key 3, you can
change over
between the two
methods of
frequency determina-
tion.
In this example a fix
frequency of 50Hz is
set.
Hz
SELECT
EDIT
CONF
Hz
SELECT
CONF