B&K Precision 570A - Manual - Manual (Page 10)

Model 570A Linear IC Tester
Copyright
 1993-2007 B&K Precision Corp.
stopping a test once it has commenced, but see the description of
loop functions later in this manual.
9. testing further ICs
After a test is completed, the test result will be displayed. To test
another IC of the same type, simply insert the next IC and press the
TEST/EXEC key again. To test a different IC, enter the new IC type
number in the usual way, noticing that pressing the first digit of the
new number automatically clears the previous number from the
display.
Remember that the MODE/CLEAR key can be used if an
error is made during the entry of the IC type number.
10. continuous testing
It is possible to test the same IC repeatedly to detect intermittent or
temperature-related faults, or to rapidly test a batch of identical ICs.
There are three types of test loop modes:
Loop - execute a test repeatedly, regardless of the result.
P Loop - execute a test repeatedly, provided the result is PASS.
F Loop - execute a test repeatedly, provided the result was
FAIL.
The B & K Model 570A is configured into one of the loop modes
using the MODE/CLEAR key as described earlier. Insert the IC and
press TEST/EXEC in the usual way to start the continuous test
process. The result of each test is displayed as PASS or FAIL on the
top right of the display. In LOOP mode, this allows a large batch of
identical ICs to be tested, without any action on the part of the
operator other than inserting the IC.
When the IC is inserted,
sufficient time must be allowed for the test to take place before the
result status is updated, so if in doubt the IC should be tested in
single mode so that the approximate test time can be determined.
It will be found that high throughput can be obtained using this
mode.
To stop any of the test loops, press MODE/CLEAR, but note that the
test in progress is completed before the command is obeyed. The