Page 47
LCD contrast (Add 012)
The preferred viewing direction for the LCD dis-
play is from „below“. The LCD contrast of the
LCD display can be adjusted by the user. The
contrast can be adjusted within the range from
0 to 7 in steps of 1. The contrast is set to 3 in
the factory.
0 = characters very dark
7 = characters very bright
In order to obtain an optimum contrast over the
whole operating temperature range, the internal
temperature of the device is measured and the
contrast is automatically corrected. This
correction is not displayed in the contrast
setting .
Phase sequence (Add 277)
The phase sequence of the voltages and the
frequency of phase L1 are shown in a display.
The phase sequence indicates the phase se-
quence in three-phase systems. A “right rotat-
ing field” usually exists.
In the UMG96S the phase sequence is tested
and displayed at the voltage measurement in-
puts. A movement of the character string in a
clockwise direction means a “right rotating field”
and a movement in an anti-clockwise direction
means a “left rotating field”.
The rotating field direction (phase sequence) is
only determined if the measuring-circuit and
operating voltage inputs have been fully con-
nected. If a phase is missing or if two equal
phases are connected, the phase sequence is
not determined and the character string is in
the display.
Phase sequence display
System frequency
L1
L2
L3
Hz
K1
K2
Unable to determine phase
sequence
System frequency
L1
L2
L3
Hz
K1
K2
Содержание UMG 96S 24V
Страница 9: ...Page 9 ...
Страница 17: ...Page 17 ...