238
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14.4 Internal Block Diagram
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U
±
I
±
Attenuation
circuit
DC-CT
Range
Range
Isolation
amplifier
HPF
LPF
RMS/DC
MEAN/DC
A/D
3193
3193
-10
Switch control
RMS/DC
MEAN/DC
Multiplication
/DC
HPF
LPF
Auto-zero
Peak hold
Waveform
shaping
Polarity
decision
Over
detect
f measurement
U
/
I
D/A
LEAD/LAG
OVER
U
OVER
I
DMAG (0 Adj)
14.4.1 RMS Value (root-mean-square value)
RMS value =
e
: Input signal waveform
T
: A period of input signal
T
0
T
T
e
14.4 Internal Block Diagram
The voltage value is converted by attenuator and range circuits to a voltage
signal waveform proportional to the measured voltage, then isolated by an
isolating amplifier.
The current input is isolated in a DC-CT, and converted in a range circuit to
a voltage signal waveform proportional to the measurement current.
Using a dedicated RMS-DC conversion IC, processing is carried out
equivalent to the theoretical expression for effective value.
For rms values, the input signal waveform is converted to a DC voltage by a
special-purpose analog rms-DC converter IC. Since this is an analog process,
all signals within the frequency range of the specification are converted
precisely.
Summary of Contents for Power HiTester 3193
Page 2: ......
Page 50: ...32 3 9 Operations During Power Failure ...
Page 76: ...58 4 13 Degaussing ...
Page 80: ...62 5 2 Setting the Frequency Range fa ...
Page 108: ...90 9 3 Internal Circuit for the External Control and Timing ...
Page 112: ...94 10 3 Output Rate ...
Page 250: ...232 13 9 Error and Overflow Displays ...
Page 278: ...260 17 5 Internal Block Diagram ...
Page 284: ...266 19 2 Installation Procedures For JIS standard For EIA standard External Dimensions ...
Page 300: ...282 20 4 Internal Block Diagram of the 3193 ...
Page 306: ...INDEX 4 Index ...
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