User Manual

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9.5 Zero Setting
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With Fixed Input Voltag
e
With Variable Input Voltag
e
0V
+V
1
+V
1
is set to 0V regardless of timing
.
0V
+V
1
The setting value to establish
the 0V level is determined at th
e
moment of setting.
+V
1
-V
2
+V
1
+V
2
With Fixed Input Voltag
e
With Variable Input Voltag
e
NOTE
0V
+V
The zero offset function sets a positive voltage as the basic potential.
■Input Voltage During Zero Offset
To set the zero offset, the input voltage must be stable. Otherwise, the zero
offset depends on the timing of the zero offset setting.
・The zero offset function can be performed only for the input voltage
measurement.
・The input voltage will be set to 0V, so before executing zero offset setting,
apply the signal that is to be offset to zero.
・When the input voltage is offset to 0V by the zero offset function, the
maximum input voltage and maximum constant voltage relative to ground
are unaffected, so care should be observed to ensure that the limits of these
voltages are not exceeded.
・When zero offset on all channels is performed, ’Warning’ is displayed if zero
offset cannot be set on any channel (the input voltage exceeds ±10 DIVs).
In this case, the zero offset on channels which can be performed is active.
■Difference Between Zero Offset and Zero Adjust
The zero offset function forces the actual input voltage to be offset to 0V for
measurement purposes. That is, if there is a potential difference between the
standard potential of the measurement object and the standard potential of
this device (0V), this function causes the standard potential of the
measurement object to be interpreted as 0V.
The zero-adjust function compensates for the difference between the input unit
potential and 0V, so that it appears as 0V. This function causes the basic
potential of this device to be 0V.