abi LinearMaster Compact Manuel D'utilisation page 9

settings. If all the outputs respond correctly, the result PASS will be
displayed at the top right of the display. A scrolling message will contain
the IC function and power pin information.
If a short circuit between the power pins of the IC is detected, a warning
'SHT!' will appear on the top right of the display and, since no valid test
is then possible, the result will FAIL. If the IC under test takes an
excessive amount of current when power is applied, a warning 'ICC!' will
appear. Press the TEST/EXEC key to continue with the test, or
MODE/CLEAR to abandon. Depending on the condition of the batteries
there may also be a 'BAT!' warning which indicates that the batteries are
incapable of supplying the current required by the IC under test. You
can continue with the test by pressing the TEST/EXEC key, but the unit
may malfunction because of a drop in battery voltage. To avoid this,
change the batteries or use a battery eliminator. Note that a faulty IC
may demand more operating current and therefore will quickly drain the
batteries.
Some ICs require external components to be fitted prior to the test - in
these cases the message EXT or CAP will be displayed at the top right
of the display. Please refer to the IC lists at the end of this 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<<
V>>
D<<
D>>
LOAD
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
BAT
ICC
LinearMaster Compact Linear IC Tester
- the voltage on the pin was lower than expected.
- the voltage on the pin was higher than expected.
- the diode drop voltage was lower than expected.
- the diode drop voltage was higher than expected.
- the input cannot be driven.
- result may be invalid because last self-test failed.
- battery voltage too low during test
- large current taken by IC under test
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