6-18 REMOTE/AUTOMATED CONTROL
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Example: MDE:0<cr><lf> - Put unit in ‘Auto Gas’
If COM is active and unit is ‘Enabled’, the response of the
unit is: “Unit must be in STANDBY”.
If the COM is not ‘Enabled’, the command is ignored both in
‘Terse’ and ‘Verbose’.
Example: MDE?<cr><lf> - Returns present mode.
If the unit is in ‘Verbose’, the response is “Auto Gas”,
“Manual Gas”, or “Gas Only”.
If the unit is in ‘Terse’, the response is “0”, “1”, or “2”.
6.4.4.8 BEAM - Beam Good Query
The BEAM query Indicates if a stable operating point has been achieved.
Command: BEAM?
Response is “1” if beam good, “0” if beam not good. This response
is for both ‘Terse’ and ‘Verbose’ mode.
Criteria for Beam Good:
Discharge Current within ± 1.28 A.
Discharge Voltage within ± 12.8 V.
Gas Flow at least 50% of setpoint.
Emission current at least 75% of setpoint.
6.4.4.9 P - Program Value Read/Write Command
The P command selects or queries the active program, or sets or queries
the active operating values for a program depending on the parameters
included with the command. The operating values are the gas
fl
ows for the
MFC’s, and the currents and voltages for the power supplies. The P com-
