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BALZERS
2.2.3
Options
2.2.4
Expansion units
The
GC
421 quadrupole controller
can be
equipped with
The quadrupote mass spectrometer functions
can be ex-
an
additional
pc
board
-
either the
AO
421
or the
IC
421
panded with modules
and
components plugged into
free
-
on
request.
slots
(see
section 7.2).
Please refer
to separate operating
instructions
for
detailed descriptions
of
the
expansion
AO
421 analog output board
possibilities
(see
appendix
J),
The
AO
421
has
12 channels
for
Chopper Lock-In operation
analog
output
of
measured
values
CLA 400 chopper lock-in-amplifier
Lock-in amplifier with integrated
chopper
drive,
suited
for
the
Bal-
zers
piezochopper.
Electrometer
lon counter
operation
operation
Electrometer
Ion
counter
operation
operation
X
x
1C
421
ion
counter board
inputloutput
modules
This module contains the circuits
necessary
for ion
counting
Al
421 analog input module
operation
plus the
same
12
analog
DI
420
digital input module
output channels contained
in the
DO
420 digital output module
AO
421.
The analog input module
has
16 chan-
nels for
analog signal inputs.
The digital input module
has
a
maxi-
mum
of
32 channels
for
digital signal
inputs.
Electrometer
Ion counter
The digital output module
has
32
operation
operation
digital output channels
×
×
Electrometer
or ion
counting operation
Al
421
maximum
1
unit
DI
420
maximum
2
units
DO
420
maximum
3
units
Total pressure measurement
Pi
420 Pirani module
PE
420
Cold cathode module
Pirani measurement
card for
two gauge
heads.
For
total
pressure
measurement
in
the
coarse
and
medium vacuum
range.
Cold cathode measurement
card for
one
gauge
head, For
total
pressure
measurement
in
the high vacuum
range.
Electrometer
or
ion counting operation
Pl
420
maximum
1
unit
PE
420
maximum
1
unit
8
Introduction
aMssage.opm
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