Stanford Research Systems RGA100, Operating Manual And Programming Reference

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6-42 Detection Control Commands
SRS Residual Gas Analyzer
Error Checking:
The CDEM option (Option 01) must be available in the RGA head receiving the
command or a bad-command error is reported (see MO command for details).
Number parameters must be within the accepted range, and must be integers.
No parameter (i. e. HV) is treated as a bad-parameter error.
Bit3 of STATUS (transmitted at the end of the command) reports errors in the
excecution of the command. CEM_ERR byte must be consulted to find out the
specific problem encountered ( See EM? in Error Reporting command list).
MO?
Description : Electron Multiplier Option Query.
Echo: Query Response.
Query the electron multiplier (CDEM) option in the RGA unit being
programmed.
The RGA is provided standard with a Faraday Cup detector. For increased
sensitivity and faster scan rates an optional CDEM is offered. The MO?
command can be used to determine whether Electron Multiplier detection is an
option in the RGA being programmed.
Note : See also EM? command in the Error Reporting commands list for an
alternative way to query the CDEM option.
Parameters :
Query is the only possible format: MO?
The value returned over RS232 in ASCII format has two possible values:
0<LF><CR> No CDEM option is available.
1<LF><CR> CDEM option is available.
Error checking:
Command must have a query format or a bad parameter error is reported.
NFparam, param: 0 - 7, *, ?
Description : Electrometer’’s Noise-floor setting.
Echo: Query Response
Set the rate and detection limit for ion current measurements.
A decrease in the Noise-Floor setting results in cleaner baselines and lower
detection limits during scans and measurements, but also means longer