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3550 LCR Meter Instruction Manual Programming and Interfacing
RS-232C
Interface Cable
The interface is based on RS-232C. The 3550 is designed to act as the DTE side, so please use a
cross cable when connecting with a personal computer or other controller unit.
Input Format
Remote In-Commands
To activate the RS-232C, send the "REN" command. This will change the 3550 from Panel
Mode to Remote Mode.
Entering Program Codes
Program codes will be sent from the controller unit to the 3550 as a string of ASCII
characters. To change the panel number, "PAN*" should be sent. (If a Panel Number is
not relayed, then the currently displayed panel will be re-set by the command)
e.g.) "PAN0 FA0 R0 M0 S0 E0"
Notice that a space is necessary between each of the commands. If a space does not
precede a command, then the subsequent command/s will be ignored.
Setting Limit Values
Below is an example of how the high and low limits of a BIN are set for DISPLAY A and
DISPLAY B.
e.g.) "BIN1 CAL+1.0000e-06 CAH+1.5000E-06"
"BIN1 CBL+0.0100e00 CBL+0.1000e00"
The order of LOW and HIGH values may be reversed. Programming LOW or HIGH alone is
also permitted.
e.g.) "BIN1 CAH+1.5000e-06 CAH+1.0000e-06"
"BIN1 CAL+1.0000e00"
To invalidate a specific BIN’s high or low limit value replace the polarity and numerical data
with a series of nine dashes as expressed below:
e.g.) "BIN1 CAL---------"
This command will invalidate the comparator’s DISPLAY A, low limit value.
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