Specifications

6-60 Error Reporting Commands
SRS Residual Gas Analyzer
Error checking:
The only acceptable parameter is a question mark.
The absence of a parameter (i. e. ED) is treated as a bad-parameter error.
EF?
Description: FIL_ERR Byte Query
Echo: FIL_ERR Byte.
Query the value of FIL_ERR.
The FIL_ERR byte value is returned to the computer in ASCII format and with a
<LF> terminator.
FIL_ERR can only be modified by the “Filament Protection Mode” which
constantly monitors the filament while it is emitting electrons. No errors are
present as long as the byte value is zero. A non-zero FIL_ERR byte is only
cleared after the filament’s heater succesfully (i.e. no detected errors) establishes
a finite electron emission current.
Consult the Error Byte Definitions section of this chapter for detatils on the
different error bytes of the RGA.
Consult the RGA Troubleshooting chapter of this manual for possible causes and
solutions to any problems reported.
Parameters: This command is a query, and can only have one parameter format:
EF?
Error checking:
The only acceptable parameter is a question mark.
The absence of a parameter (i. e. EF) is treated as a bad-parameter error.
EM?
Description: CEM_ERR byte Query
Echo: CEM_ERR Byte.
Query the value of CEM_ERR.
If no electron multiplier (CDEM) is available, the absence of the CDEM is
reported setting bit 7 of CEM_ERR before the byte value is transmitted.
In all cases, the CEM_ERR byte value is sent to the computer in ASCII format
with a <LF><CR> terminator. CEM_ERR and Bit 3 of STATUS are then
cleared.
This query command can be used to determine whether the CDEM option is
installed in the RGA unit being programmed: A CDEM option is available if Bit
7 of CEM_ERR is cleared when the byte is queried (See also MO command).