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4.3 Advanced Setting
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.3.4 Lead Line Break Check (Imperfect Contact Check)
NOTE
NOTE
■ SOURCE line break check
The 3560 measures resistance using the AC constant-current system.
With this method, an AC constant current is unlikely to be supplied due
to a broken SOURCE line or the resistance of the measurement object.
Since using normal measurement procedures in such circumstance will
produce incorrect resistance measurements, the system checks the
SOURCE line for breaks. If a break is detected, "−−−−− "appears in the
measured value display field, and the associated signal is output to the
external output terminal. For external output terminal details, see
Section 6.3.2 "External Output Terminal."
The SOURCE line break check cannot be disabled.
■ SENSE line break check
The SENSE line is examined for breaks. If a break is detected,
"−−−−− " appears in the measured value display zone, and the
associated signal is output to the external output terminal. For external
output terminal details, see Section 6.3.2 "External Output Terminal."
The SENSE line break check may be disabled or enabled.
1. Press the
SHIFT key. "SHIFT" appears lit on the
display.
2. Press the
5/50 (SENSECHECK) key. The screen
changes to the SENSE line-break check screen.
3. Press the
+ and keys to select ON/OFF. The
selected mode will flash.
4. Press the
ENTER key.
･ Breaks in the SENSE line are detected with a 2-kHz low AC current
applied between the SENSE line and measured object, as well as the
measurement current.
･ An extended lead will create a capacitive load and possible lead to an
incorrect implementation of the SENSE line break check. When using a
nonstandard lead, be sure to short-circuit the SOURCE line to open the
SENSE line, and make sure the broken line check is implemented
correctly.
･ When this setup screen is active, only the
+, , SHIFT, and ENTER keys
are enabled.
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