Stanford Research Systems RGA100, Operating Manual And Programming Reference

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9-4 Internal Error Detection in the SRS RGA
SRS Residual Gas Analyzer
RGA Programmers: Repeat the query command, if a problem was detected after the
last query.
Note that the values of the Error Bytes often change after an Error Byte query
command is executed. Some query commands update the byte value after performing
a fresh test on the hardware, while others clear error bits, after they are read, to
provide a clean error-reporting slate. Please see the Error Reporting Commands list
for details.
x
Communications errors are different from hardware errors in that the Error LED only
flashes two or three times when the problem is detected.
RGA Windows reports communications errors very explicitly as soon as they are
detected. RGA programmers will need to use the EC? command to diagnose the
problems.
x
RGA Programmers should consider having their programs automatically report the
Error Code for each problem detected.
x
Use the Get Head Info... command in the Head Menu of RGA Windows to get a
complete listing of all the Error Bytes at any time.