ST2883 Series Operation Manual Chapter 4 Introduction to [DISP]
4-4
4.3.2 Compare
ST2883 series provides four kinds of compare methods as follows: Area Size Comparison, Differential Area
Comparison, Corona Discharge Comparison and Phase Differential Comparison. The instrument collects the
waveform data of 6000 points, thus user can select the comparison area between the start position and 6000.
Press the Compare soft key to enter the main menu of it. Four compare methods can be set under this menu.
Note: Press the soft key to enable the roller. When the roller is revolved, two parallel yellow
lines (except Differential Phase comparison) will be displayed in the waveform display zone. The full
line is the selected one, while the dash line is not the selected one.
4.3.2.1
AREA SIZE
Select the area comparison method.
State
means this method is turned on, while
means off.
Lighten this icon to enable the roller. The start point, the end point or both the start and
the end points will be selected by the press of the roller. Revolve the roller will change
the position of the start point, the end point or both the start and the end points by 10
points. The position ranges from 0 to 6000.
Lighten the icon to enable the roller and change the differential value.
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4.3.2.2
DIFF ZONE
Select the differential area size comparison method. All setup operations are the same
as those of AREA SIZE.
4.3.2.3
CORONA
Select the corona comparison method. All setup operations are the same as those of
AREA SIZE. The corona comparison value has no unit ranging from 1 to 255.
4.3.2.4
PHASE DIFF
Select the phase differential comparison method. All setup operations are the same as
those of AREA SIZE. But the position parameter is different, it means to choose the
zero-crossing position and the value ranges from 2 to 99.
4.3.2.5
Return to the main menu.
4.3.3 Measure
Measurement function is used to measure impulse voltage, time and frequency.
Note: When a function is selected and the roller is enabled, two lines will be displayed in the waveform
display zone. The differential value of the two lines corresponds to the value showing on the second soft
key.
Press the roller to switch between the high limit, the low limit and the high and low
limits. Then revolve the roller to change the position of the high and the low limits. The
voltage differential value between the high and the low limits (
Δ
V) is as shown on the
second soft key.
Position
0000-6000
Method
AREA
Position
0000-6000
Diff
2.0%
Method
DIFF ZONE
Method
Corona
Method
PHASE DIFF
Voltage
1000V
