BG 805 981 BE (0201) QMG422.oi
45
TYPE
Selection of signal source, depends on the configuration
FARAD
Electrometer signal from Faraday collector
SEM
Electrometer signal with SEM
ION-CNT
Ion counter
EXTERN
External analog signal in place of EP 422 signal. Filter and processing
functions of the QC 422 are used.
PIRANI
Total pressure measurement with Pirani module
PENNING
Total pressure measurement with Penning module
A-INPUT
Analog signals on AI 421. Filter and processing functions of the QC 422 are
not used.
400
Changeover to special ion sources. The electrode names are replaced by
"V1...V9" and all potentials are made accessible.
TYPE
With
ion src-MODE:NORMAL
xyz
Normal ion source according to
config-SYSTEM:IS-TYP
SPEC+
Special ion source, detection of positive ions
SPEC–
Special ion source, detection of negative ions. The potentials of the IS 420
and the bias voltage of the HV 421 with
config-SYSTEM-DETECT:H-SEM
are inverted.
With
SPEC
± and
EMISS
= 0 the SPEC-SRC-ON signal on the
QMA
connector of
the IS 420 is active. In this way an external relay for changing over the ion source
electrodes can be controlled.
TYPE
Mode of switching functions (
→
6.14)
OFF
Switching function not active. The DO bit is available for other applications.
ABS
A and B are independent switching functions with one threshold value each.
HYST
A and B form a switching function with hysteresis. status changes when the upper
or lower threshold value is exceeded.
400
The V... designations appears with
ion src-TYPE :SPEC±,
with standard ion sources the electrode names are displayed.
See tech. Data
16
See
V9
Mass scan width of the measurement channel
WIDTH
Not with
mass-MODE:SAMPLE
or
detect-TYPE:PIRANI, PENNING, A-INPUT
-2047 ... +2047
The maximum value depends on the mass range
Negative
WIDTH
results in a backward scan. In this way small peaks that are 1
mass above a very large peak can be measured more effectively.
TYPE (detect)
TYPE (ion src)
TYPE (trip)
V1... V9
WEHNELT (ion src)
WIDTH (mass)