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105
Contact Check
8.2 Contact Check
When a measurement is performed with the measurement jig of the measurement system not
in contact with the test target during a withstand voltage test or insulation resistance test, a
false judgment is made for insulation defects. A contact check is a function to check whether the
measurement jig is in contact with the test target to prevent such false judgment.
The contact check function for this instrument is an electrostatic capacitance detection method
type. A contact check can be performed for connections of normal withstand voltage and insulation
resistance tests.
When the contact check function is enabled, the connection between the HIGH terminal and LOW
terminal of the High Voltage Test Lead can be checked.
• A contact check is executed at the end of the tests for this instrument.
•
Since this instrument is an electrostatic capacitive detection method type, it cannot be used for a
test target with a low amount of electrostatic capacitive components, such as pure resistance.
• Even if the contact check function is set to
[ON]
, a contact check is not executed when the test
result is fail and the test is forcefully terminated by a STOP signal.
• When the contact check function is set to
[ON]
, the output timing of the external control judgment
signal is
[MEAS END]
Contact check procedure
Connect the test target to the test lead and measure the capacitance. When the capacitance value
is more than the threshold value, a contact error occurs. In this case, inspect the instrument and
measurement jig.
Contact check setting (enabled/disabled)
Set whether to perform a contact check or not.
This is a common setting for all test modes except for the BDV measurement mode.
1
Press
[COMMON]
>
[STATE]
on the setting
screen.
When the contact check setting is changed from
[OFF]
to
[ON]
, a confirmation message is displayed.
ON
Enables the contact check function.
OFF
*
1
Disables the contact check function.
*1. Default setting
2
2
2
Press
[YES]
.
When the contact check function is enabled, set the
voltage drop time
[FALL TIME]
to
[OFF]
. (p. 51)
Various Functions
HIOKI ST5680A961-00
Summary of Contents for ST5680
Page 2: ...HIOKI ST5680A961 00 ...
Page 84: ...84 Individually Executing Specific Steps HIOKI ST5680A961 00 ...
Page 118: ...118 Key Lock HIOKI ST5680A961 00 ...
Page 154: ...154 Calibration Expiration Check Function HIOKI ST5680A961 00 ...
Page 182: ...182 Internal Circuit Configuration HIOKI ST5680A961 00 ...
Page 220: ...220 Option Specifications HIOKI ST5680A961 00 ...
Page 238: ...238 External View 16 4 External View Unit mm HIOKI ST5680A961 00 ...
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