LFE 2000 Series - Page 73

958-31
REV.
B
7)11
1
)
E
h
TUNE
RATE
1
MODELS
WITHOUT
AUTO/MANUAL
FEATURE
The
0/10
vDC
analog
output
circui-t
has
no
caribration
adjustnents.
rherefore,
rnstallation
into
the
calibration
case
is
not
requrred.
Most
analog
loads
are
high
lmpedance.
rt
is
therefore
normal
to
calibrate
the
output
without
a
load.
when
rt
ls
known
that
the
load
will
be
lower,
that
specific
load
resistance
(mlnimum
20000)
should
be
connected
across
output
terminals
4
and
5
for
ANALOG
ourPUT
I
and/or
across
terminals
D
and
E for
ANALOG
OurPUT
2'
Then
connect
a
drgital
voltneter
across
ourpur
I
or
ourpur
2
rear
tetminals.
Allow
a
5
minute
warmup
before proceding
with
the
nexr
step.
connect
a
suitabre
calibration
source
to
the
input
t,ermlnals
lnput
so
that
the
display
reads
about
half
span,
1.e.,
halfway
SPAN
and
HI
SPAN.
4.
Enter
the
TUNE
LOOp
di-sp1ay
reads
TUNE?
DISPLAY
key
several
tlmes
to
this question.
and
adjust
the
between
the
L0
untrl
the
and
press
the
pARAM
OUTPUTS.
Answer
yES
LOOP
flow
chart,
ser
to
0.00
(of
f
).
Following
the
R/M
(off)
and
If
oUTPUT
2 is
)
the
PR
BAND
I
to
257.,
RESET
1 to
0.00
also
being
adjusted,
set
AUXSp
to
0
and
repeat
step
5
for
Ourpur
q
Press
RETURN
to
retui:n
to
the
0PERATOR
LOOP.
Advance
the
display
to
show
the
setpoint.
on
the
bot-tom
I
D0wN
arrows,
adjust
the
setpoint
to
the
same
varue
as
the
on
the
top
line.
press
the
pARAM/DISPLAY
key
until
the
XXX%
or
0UT2
XXXZ.
If
the
},lAN
indicator
is
blinklne press
the
START/srop
kev
off.
Ine.
Using
the
Up
and
process
varrable
shown
bottom
line
shows
OUTI
to
Iurn
Lhe
irrdicator
10.
Adjust
the
calibration
source
until
the
Display
shows
ourl
Looz.
11.
The
dreltal
voltmeter
should
now
indicate
10v t0.l
vDC.
12.
Adjust
the
calibration
source
until
the
dj.splay
shows
oUTl
OZ, or oUT
2 o%.
The
djgital
voltmeter
reading
should
be
approximately
0.
13.
Repeat
steps
l0 through
12
for the
second
0/10
VDC
Analog
output
as
req6ired.
14.
Check
the
perfornance
by
varying
the
percent
ANALOG
OUT
digital
voltage
indicatlon
varjes
15.
Following
calibration
remove
the
controller
rernstall
into
its
controller
case.
(NOTE:
that
the
electronic
assembly
is
mated
with
was
used
for
input
caljbration.
Otherwj-se,
per
Section
6.12.
(7")
OUTPUT
POIJER
and
notrng
that
accordingly.
from
the
calibration
connector-
and
For older
cont.rol
lers,
make sure
the
same
compensator
resistor
that
the
control
ler rnust
be
recal ibrated
LFE
Instrunents
Division
-66-