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Contact Check
Contact check is used to check the electrical contact between the test head and DUT. This
check consists of measuring dc resistance between the two and determining whether the
resistance is within the preset limits.
Follow the procedure below.
1. Press
Contact Check
4
2. Set the upper and lower limits for dc resistance between the test head and DUT.
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Press
RDC UPPER LIMIT and enter the upper limit.
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Press
RDC LOWER LIMIT and enter the lower limit.
3. Press
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RDC MEAS on OFF to toggle it
Then, the measured dc resistance will be displayed on the screen.
4. Press
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RDC LIMIT on OFF to toggle it
Whether the measured resistance is within the limits will be displayed on the screen.
Contact check results will be output and displayed as follows:
On-screen FAIL Message
Handler Interface
GPIB Command
.
5
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RDC MEAS ON off .
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RDC LIMIT ON off .
4286A with Chip Handler
4-7
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