Hioki 3560 - SOURCE;SENSE Line Break Check

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10.5 SOURCE/SENSE Line Break Check
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Amplitude monitor
Broken SOURCE line detection
Broken SENSE Hi line detection
SOURCE Hi
Measured object
i
3
Broken SENSE Lo line detection
SOURCE Lo
SENSE Lo
SENSE Hi
i
1
i
2
Faulty signal detection
i
1
: Measurement current
i
2
: SENSE Hi line break detection curren
t
i
3
: SENSE Lo line break detection curre
nt
Abnormal measurement
signal output
1
0.5 SOURCE/SENSE Line Break Check
The 3560 supports SOURCE line break check and SENSE line break
check functions. The SOURCE line break check function may be enabled
or disabled. The figure below gives a SOURCE line break check circuit
diagram. If a broken SOURCE line is detected or measured resistance
deviates from the specified range, an abnormal measurement signal is
output.
The figure below shows a SENSE line break check circuit diagram. In the
SENSE line break check, a low current is supplied to the SENSE line to
detect breaks, in addition to the measurement current. Since the
frequency of this detection current differs from that of the measurement
current, measurement remains unaffected by the detection current. If a
low current input leads to problems, the SENSE line break check
function should be disabled.