B&K Precision 570A - Manual - Manual (Page 9)

Model 570A Linear IC Tester
Copyright
 1993-2007 B&K Precision Corp.
manual for details of the component(s) required. After fitting the
component the test can be carried out by a further press of the
TEST key.
If you wish you can abandon the test by pressing the
CLEAR key.
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:
V<< - the voltage on the pin was lower than
expected.
V>> - the voltage on the pin was higher than expected.
D<< - the diode drop voltage was lower than expected.
D>> - the diode drop voltage was higher than expected.
LOAD - the input cannot be driven.
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
Some ICs are available in various packages, and also there are
some ICs in the library which have the same numerical part number
even though the IC functions are different. In these cases the B & K
Model 570A
will automatically determine the IC type prior to the
test, provided that the IC is functional. If the IC is faulty, the
following warning will appear after the test:
WARNING: All Part Types FAIL
This indicates that the IC is faulty, but the pin information cannot be
displayed since the exact part type cannot be identified.
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