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The amount of Component data which needs to be
entered with the RS-232 Value Multiplier codes for a
GOOD/BAD test depends on the LC103 function. The
chart in Table 9 shows the component parameters
needed for each GOOD/BAD test. Sending additional
data to the LC103 will not affect the tests.
Table 9 - These parameters must be entered for the
LC103 to produce a good/bad test result.
NOTE: The LC103 will send good/bad indicators back
to the computer for each reading if all necessary
information has been supplied. To stop the LC103 from
sending the “G” or the “B” as part of its returned data,
simply send a zero value reading, such as “0 pF”. The
other Value Multipliers (such as percentages or voltage)
will remain in
the LC103 memory until
changed or until
power is removed from the unit.
The plus and minus component tolerance limits must be
sent in the correct form. First, the number must be a
whole number, with no decimal. Then, the percentages
must be within the allowable range. The largest negative
number allowed is 99 percent (-99%). and the largest
positive number allowed is 100 percent (+100 %).
Numbers that are outside this range, or that contain a
decimal, produce an Error 2 condition.
Setting the Leakage Voltage
The leakage power supply must be set to the desired
voltage before selecting a leakage test with the LKI or
the LKR codes. The supply can be set to the nearest
tenth of a volt. The listener code simply consists of the
desired voltage followed by the letter V and the End
Terminator. For example, “100V” sets the supply to
produce 100 volts when a leakage function is activated.
The highest voltage which can be programmed into the
LC103 is 1000 volts the lowest is 1 volt. Attempting to
enter a voltage higher or lower than this range will
produce an Error 2 condition.
The leakage power supply only applies power to the test
leads after one of the two leakage functions have been
selected with the “LKI” or “LKR” listener code. The
power supply automatically removes voltage from the
test leads when the computer sends any other listener
code, or when the front-panel button is pressed.
———————— WARNING —————————
The warning LED on the front of the LC103 will
falsh as a reminder that a shock hazard of up to 1000
volts may be applied to the test leads when a leakage
test is selected. Use extreme caution when the LED is
blinking.
————————
ATTENTION
————————
La LED d’alerte sur la face avant du LC103 clignote
lorsque qu’un risqué de choc est possible car plus de
1000V peut être appliqué á la sonde lorsque le test de
fuite est utilize. Faites très attention lorsque la LED
est allumée.
NOTE: When not using a leakage test, send the
listener code “0V” to the LC103 to prevent accidentally
applying a voltage to the test leads, unless you want an
ESR GOOD/BAD indication.
Test Function Commands
One of the seven listener Test Function Codes must be
sent to the LC103 before the computer can request a
reading. The selected function is cancelled by any other
listener code sent to the LC103, meaning that a Test
Function Command must be the last listener code sent
before a reading is requested.
The LC103 will remain in the last function selected until
it receives another test function command or listener
code. The computer can select an LC103 test, go on to
other instruments on the bus, and then come back to the
LC103 at a later time to request a reading. This allows
tests which require longer times, such as capacitor
leakage, to be used without slowing the operation of
other instruments on the bus.
The LC103 starts a test from its beginning every time it
receives another Test Function Code. Therefore, if the
LC103 has been preset to a function for a delayed
reading, make certain that the computer does not resend
the code just before a reading is taken.
General Codes
The four general listener codes activate special functions
when sent to the LC103. The codes let the computer
instruct the LC103 to compensate for the test leads, clear
a function, or return control of the LC103 to the front-
panel switches.
TEST
Compon.
Type
Ind
Value
Cap. Value
Cap. Leakage
Cap. ESR
Cap. D/A
Ind. Value
Ind. Ringing
+%
-%
Cap
Voltage
X
Cap
Value
X
X
X
X
X
X
X
X
X
X
X
X
*
*
*
*
*
= Must be entered for GOOD/BAD results.
= Tolerance are set to zero percent at power-up.