Omicron CMC 356, Руководство пользователя

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Technical Data
69
Four different operating modes are possible:
• Multimeter Mode (section 6.10.6)
• Harmonic Analysis (section 6.10.7)
• Transient Recording (section 6.10.8)
• Trend Recording (section 6.10.9)
6.10.2 Analog DC Input (V
DC,
I
DC
)
Figure 6-19:
DC measurement unit
(analog inputs V
DC
, I
DC
)
The measurement of analog DC signals has been implemented to enable
the testing of transducers. The measurement unit consists of
• a highly accurate voltage reference,
• one ADC ( A nalog D igital C onverter) for each input, and
• the respective input circuits (i.e., accurate voltage divider, shunt, filter).
The DC measurement unit measures the input signals V
DC
and I
DC
and
performs the evaluation and forwarding of the measurement values.
Input I
DC
has two measurement ranges: 0 … ± 20 mA and 0 … ± 1mA. The
input is protected by a reversible input fuse. The inputs V
DC
and I
DC
reference a common neutral N. The DC measurement unit is galvanically
isolated from all other connections on the front panel.