LFE 2000 Series - Page 69

958-31
REV.
B
7.2
OUTPUT
ADJUSTMENT
AND
TEST
**
NOTE_*/.-
FOR
MODELS
2012
AND
2013,
MANUAL
CONTROL
FOR
CONTROLLERS
WITH
AUTO/MANUAL
CONTROL
TO THE
''MANUAL
I
CONTROL
?''
OR
,,MANUAL
2
TUNE
LOOP.
USED
IN
THE
PROCEDURES
BELOW
I.S
ACCESSIBLE
BY
ANSWERING
YES
CONTROL
?''
DISPLAYS
FROM
THE
7.2.r
7
,2.t
,1
l.
4-20
mA
AN4LOG
OUTPUT
1
AND
ANALOG
OUTPUT
2
ADJUSTMENT
CONTROLLERS
WITH
AUTO/MANUAL
FEATURE
Press
the
UP
ARR0W
key
until
the
OUTPUT
I
or
2
Ad.;ust potentlometer
Rl01
for
ANALOG
0UTPUT
1
digital
voltage
indication
of
+21
!0.2
VDC.
rndicates
lOO7".
or
R100
for
ANAL0G
OUTPIJT
Z for
a
)
1
4.
Install
the
electronlcs
assembly
into
a cAI_IBRATTON
coNNECToR
(LFE
p/N
345_g26).
This
connector
provides
access
to
the
analog
cfrcuit
potentlometers
Rl00
and
R10l
located
on
the
top
edge
of
the
r/o
board
while
the
controller
rs energized.
connect
a
10000
l/2w
l%
resistor
across
output.
terminals
4
and
5 for
ANALOG
ourPUT
I
and/or
another
10000
resistor
across
terminals
D
and
E
for
ANALOG
0urPUT
2'
Then
connect
a
digital
voltmeter
across
ourpur
I or
oUTplJT
2 re-ar
termi-na1s.
Allow
a
5
minute
ldarnup
before
proceding
with
the
next
step.
Advance
the
display
in
the
OPEMTOR
Loop
until
our
I
x%
or
Our
2
x%
is
displayed.
rf
MAN
jndicator
is
flashj-ng, press
srART/srop
key
and
then
press
AUT0/MANUAL
key
until
the
MAN
indicator
is
illuminated
continuously.
Reduce
the
OurPtlr
to
0%
with
the
DOWN
ARR0W
key.
The
dieltal
voltage
indication
should
be
approximately
+l
to
+4
VDC.
(If
the
zero
adjustnent
pot
optron
has
been
installed per
section
4.3.7,
adjust pot
Rl03
or
R104
as
approprr-ate
for
4
VDC.
71r,)
l.
Repeat
the
above
adjrrstment procedurr:
for
the
second
4-20
na
DC
required.
Analog
Output
as
Check
the
performance
by
varying
the
percent (%)
OUfpUT
POWER
and
noting
that
ANALOG
Our
digital
voltage
indication
varies
accordingly.
Fol
lowing
calrbration
remove
the
control
I er
frorn
t-he
callbration
connector
and
rernstall
into
its
controller
case.
(NOTE:
Make
sure
that
the
electronic
assernbly
is
mated
with
the
same
compensation
resistor
that
was
used
for
calibration.
otherwise,
the
controller
nust
be
recalibrated per
Section
G.12.
)
MODEI,S
WITHOUT
AIJTO/MANUAL
FEATURE
Install
the
electronics
assembly
into
a CALIBRATI0N
coNNECToR
(LFE
p/N
345-g26).
This
connector provides
access
to
the
analog
circuit
potentiometers
Rl00
and
R101
located
on
the
top
edge
of
the
rlo
board
while
the
controller
is
energrzed.
8.
LPE
Instruments
Division
-62-