B&K Precision 575A - Manual - Manual (Page 11)

Model 575A Digital IC Tester
Copyright
 1992-2007 B&K Precision Corp.
Page 7
In the case of a FAIL result, the error conditions at all the non-
functional pins of the IC will be scrolled on the display, and the IC
function will be shown. The various failure conditions that can be
displayed are as follows:
LOW - the output was LOW when HIGH was expected.
MID LOW - the output was LOW, but not a valid logic level.
HIGH - the output was HIGH when LOW was expected.
MID HIGH - the output was HIGH, but not a valid logic level.
LOAD 0V - the input cannot be driven HIGH.
LOAD 5V - the input cannot be driven LOW.
In some cases, the scrolling test results may include one or more
WARNING indications. These warnings indicate conditions that may
result in an incorrect test result, and are as follows:
D/F - result may be invalid because last self-test failed.
BAT - battery voltage too low during test.
ICC - large current taken by IC under test.
Before discarding a failed IC check that the correct IC type number
was entered and also check that the IC pins are clean and making
good contact with the test socket.
Note that there is no way of
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.