YOKOGAWA 320110, Руководство пользователя

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IM 3201–E
5. When it is desired to measure a voltage of high frequency,
connect the COM- terminal to the ground side of the measuring
circuit. This arrangement prevents indication errors caused by
the stray capacitance between the tester and the ground.
(Refer to
Fig 3.1 Frequency Characteristics
in which an
example of the frequency characteristics is shown.)
6. When measuring AC voltage in the circuit where a DC component
is included, connect the leads respectively to the OUTPUT terminal
and COM- terminal. For further procedures, follow instructions
described in the paragraph “AC Voltage Measurement”.
7. To the OUTPUT
terminal a 0.2 μF capacitor (400 W. V) is
internally provided in series so that the DC component is
impeded and only the AC voltage is indicated.
8. In case of low frequency, voltage drop across the capacitor
causes an error in indication. This error depends upon the
measuring range. (Refer to
Fig. 3.2 Frequency Characteristics
when OUTPUT Terminal is Used
)
0.2
0
1
2
3
4
5
0.5 1 2 10 5 50 100 20
Frequency (kHz)
Error
(%)
120 V Range
30 V Range
3 V
Ra
nge
12 V
Ra
nge
Fig 3.1 Frequency Characteristics
50 100 200 500 1000 20
Frequency (Hz)
-10
0
-20
-30
-40
Error
(%)
3 V Range
12 V
Range
30 V Range
Fig. 3.2 Frequency Characteristics
when OUTPUT Terminal is Used