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BAI.ZERS
6.5
Integrator
6.5.3 Integrator background (I-UGND)
The Integrator
is
a
special function
that
works
out the in.
The integrator background
is
found out with
<cycle>
tensity
intagral over time
for
the measured value from
a
«FUNCT»
:
«l-UGND».
For
this,
a
normal »SAMPLE«
quadrupole
mass
spectrometer measurement channel.
rneasurement
is
made at
the
selected channel. The back-
When
a
preset threshold
(<integ>
«SETPT»)
is
reached,
ground measurement
is
started
/
stopped with
a
switching
process
can
be
triggered.
<run/halt>.
The system
is
switched to single channel
operation (mono channel) automatically
while this back-
The integrator
can be used for the
following signal
ground measurement
is
being
made.
source
/
type
of
detector
(<detect>
«TYPE»);
I
NOTE: The background value
is
not changed
when
«FARAD»
or
«SEM»
integral units
=
As
the measurement channel
or
type
of
detec-
«ION-CNT»
counts
tor
is
changed. The operator must correct
«EXTERN»
Ys
the background
value
if
necessary,
i
NOTE:
When the control unit
is
tumed
off, the
6.5.1 Forming
the
integral
value
value measured
for
the background
is
lost
and
is
thus always
zero when
the unit
is
The measured value
for
the intensity
is
sampted
at con¯
turned back
on
again.
stant intervals
T
(50
ms)
independently
of
the other
measurements being made (Cycle),
and
a
partial integral
is
calculated
for
the sample period, The previously
defi-
ned
background signal
(1-UGND)
is
subtracted from the
intensity
measurement
for
this calculation.
6.6 Using
the
digital
output
module
When
the
control unit
is
configured with
one or more
DO 420 digital output modules,
you can
assign
one or
more
switching function levels
(<trip>
«DO-A»,
<trip>
«DO-B»
or
<integ>
«DO-I»)
to each of
the
32
bits
per
module.
The
DO 420 module also allows
the
channels to
be
manipulated
via one the
interfaces
(refer
to separate
operating instructions
[6]
).
6.5.2 Integrator operation
CAUTION:
If
several switching
function
levels
are
assigned to the same
DO
bit, these
are
The integrator operation
is
defined with the
<inte9>
connected
in
an
AND logic gate.
No
function:
warning
is
given
if
bits
have
already
t>een
assigned.
URLUE
:
4.2633E-15
As
TIME
.
66.88.53
CHAN
20:
5ETUP INTEGRATOR
**
**
TRIG
5ETPT
00-I
INTEGRRTOR
INTERN
1.000E
10
OFF
START STOP
6.7
Measurement
operation
The integrator function
is
started either from
the
OMG
<cycle>
«FUNCT»
:
«CYCLE»
-->
Haj (FL
63)
system
(via
console
or
interface)
or
externally
via
the
<ctrl>
connector.
NOTE:
The integrator function
can
only
be
started
when
the measurement cycle
is
active
6.7,1
lon
counting operation
(«mono»
or
«multi»), The integrator cannot
6,7.1.1 Measured value
display
be
used
when the
system
is
in
the »halt«
state
or
during background measurements
In
contrast
to how
other measured values
are
presented,
(I-UGND)·
the mantissa value
is
not output
as
a
bar
graph
in
ion
When the switching function
is
active (<integ>
counting operation.
In
ion
counting operation the total
«SETPT»
:
not «OFF»),
the
assigned bit
(<integ>
measured value
is
output
as
a
quasilogarithmic
bar
«DO-l»)
is
set together with
the
integrator. When the in,
across
ten decades,
tegral value
reaches
the
predetermined threshold value,
i
1
234
56789
i
the
DO bit
is
reset and the integrator
is
stopped. The
in-
tegrator function
can, of
course,
be
stopped
by com-
mand at
any
time,
uma
amman
MMERN
BREEN
BRE-M
Hmmmm
779E-06 illissigmiÍREMEREBENILÄ
oms424o.opm
Measuring with the
OMS
421
79
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