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The codes may be sent by the computer as either upper
or lower case letters.
All data sent to the LC103 must end with a carriage
return character, to be recognized by the LC103. Some
computers automatically add this character to the end of
every string of data, while others have a special function
which adds the carriage return when activated with a
software command. If your computer has neither of these
options, you can add a linefeed character by storing the
character in a variable and then adding this variable to
your data before sending it to the bus.
The data or listener codes sent to the LC103 fall into
four groups: 1. Component Type Commands, 2. Value
Multipliers, 3. Test Function Commands, and 4. General
Commands. All listener codes are listed in Table 8. They
are also listed in the Simplified Operating Instructions
on the PULL-CHART under the unit for ready reference.
Table 8 - RS-232 control codes for the LC103.
Component Type Commands
These codes duplicate the front panel COMPONENT
TYPE switches and must be sent to the LC103 if you
want the test results to be compared to the tables and
calculations associated with the LC103 microprocessor.
As in non-RS-232 operation, the LC103 uses these to
establish the GOOD/BAD limits for the leakage, ESR,
dielectric absorption, and coil ringing tests. The good/
bad results may be in error if the wrong Component
Type Command is sent.
Value Multipliers
These listener codes let the computer send component
data information to the LC103 including the ideal
component value and value tolerance limits. The codes
duplicate the non-RS-232 operation of the component
parameters keypad for entering component data.
As with manual operation, each Value Multiplier
Command includes a number, followed by the listener
code. There are four types of Value Multipliers for RS-
232 programming: 1. Capacitor value, 2. Inductor Value,
3. Percent tolerance, and 4. Capacitor voltage. The first
three are only used for LC103 automatic GOOD/BAD
comparisons. The capacitor voltage code also sets the
LC103 power supply to the selected voltage for the
leakage test.
When sending a component value to the LC103 it is not
necessary to send long strings of zeros to establish
decimal readings. Instead, use the value multipliers uF
(microfarads), pF (picofarads), and F (farads) for
capacitors and uH (microhenries), mH (millihenries),
and H (henries) for inductors. The characters may be
sent in upper or lower case. For example, “uF”, “UF”, or
even “Uf” will all
produce the same
results. The
LC103 also
ignores any blank
spaces between
listener code
characters. This
means that
“10UF”, “10 UF”
and even “10 U
F” work equally
well.
The complete
Value Multiplier
code consists of
the correct
numeric value,
the Value Multiplier, and the End Terminator. The
following examples show valid commands, with the End
Terminators not shown:
4.7uF
(enters capacitor value of 4.7 microfarad)
100 pF
(enters capacitor value of 100 picofarads)
15 V
(enters leakage voltage of 15 volts)
20+%
(enters value tolerance of + 20%)
5H
(enters inductance value of 5 henries)
Note: When using multipliers, the numeric portion of the
string should be limited to 10 characters.
Command Description
LDO Lead zero open
LDS Lead zero short
NFC No Function
CPO Control panel on (front panel operation)
Ctrl R Continue taking/sending test data
Ctrl O Return a single reading, (default)
GENERAL COMMANDS
Command Description
CAP Capacitor value
LKI Leakage current
LKR Leakage resistance
D/A Dielectric Absorption
ESR Equivalent series resistance
IND Inductance
RIN Ringer
CIC Capacitor in circuit
EIC ESR in circuit
IIC Inductance in circuit
TEST FUNCTION COMMANDS
Command Description
pF PicoFarad
uF MicroFarad
F Farad
uH MicroHenry
mH MilliHenry
H Henry
+% Positive tolerance in percent
-% Negative tolerance in percent
V Voltage rating, leakage voltage
VALUE MULTIPLIERS
Command Description
ALM Aluminum Electrolytics
DBL Double Layer
TAN Tantalum Caps
CER Ceramic Caps
AOC All Other Caps
HIR High Resistance Double Layer Lytics
COL Coils
YFB Yokes and Flybacks
SWX Switching Transformers
COMPONENT TYPE COMMANDS
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