|
1. |
Let the
system
run for
at least
15
minutes.
|
|
2. |
If
possible,
make
sure the
plant is
in a
normal
operating
mode.
i.e.
temperature,
vibration,
noise,
etc...
|
|
3. |
Put the
unit in
the
calibration
mode.
|
|
4. |
Confirm
that the
amplifier
boxes
are
supplied
with the
same
clean
120VAC
or
240VAC
as the
controller.
Using a
multi-tester
at the
amplifier
box to
check
wires
5+, 2-
for the
correct
voltage
(+/-
5VAC).
______________=
VAC,
output
of 5+,
2-.
|
|
5. |
Make
sure the
power (pwr)
side of
the tare
board
reading
10VDC.
______________=
VDC,
power to
the tare
board.
|
|
6. |
Check
the
input
"in"
side of
the tare
board
(the
signal
from the
load
cell) to
make
sure it
is
between
10-15mV.
______________=
mV, at
the
input of
the tare
board.
|
|
7. |
Measure
the
output
"out"
side of
the tare
board
and make
sure it
reads
0mV. If
it does
not read
0mV, you
can
adjust
the
output
with the
trimpot
on the
tare
board
until it
reads
0mV.
______________=
mV, at
the
output
of the
tare
board
before
adjustment.
______________=
mV, at
the
output
of the
tare
board
after
adjustment.
|
|
8. |
Make
sure the
output
of the
amplifier
(wires
9+, 10-)
is
between
0-30mV.
It is
normal
to see
some
fluctuation
of this
value.
If the
value
needs to
be
adjusted,
use the
tare
board
trimpot.
DO NOT
use the
trimpots
on the
amplifier,
this can
affect
range
and span
values
that are
preset
at the
factory.
______________=mV,
at wires
9+, 10-
before
adjustment.
______________=mV,
at wires
9+, 10-
after
adjustment. |
Company :
___________________________ Date :
_________________
Person in charge
:_____________________________
Checking the Electronics on the
Reliadens™
Before you
proceed with
these tests,
confirm the
following items:
|
1. |
The unit
has
45-50
PSI of
clean
dry air.
|
|
2. |
The unit
has
clean
120VAC
power
with a
single
ground
point.
|
|
3. |
The unit
has been
running
in a
normal
operating
mode for
at least
30
minutes.
|
|
4. |
The
plant is
in a
normal
operating
mode.
|
|
5. |
Data and
Power
wiring
in
separate
conduit. |
Procedure:
For this test
you must be in
calibration
screen and do
the test twice,
one without
weight in cup
(Cup up & empty)
and one other
with weight in
cup (Cup up with
weight added).
To reach the
calibration
screen:
|
1. |
From the
operating
screen
press
RETURN
|
|
2. |
Press
CALIB,
What is
the
value
displayed?___________
(1)
(You are
in
calibration
now) |
For each test:
|
1. |
Take the
different
voltages
without
weight
in the
cup.
|
|
2. |
Take the
different
voltages
with
weight
in the
cup
Please
report
here the
data
displayed
on the
calibration
screen
:_____________
(1) |
Controller
Box
Amplifier Box
These checks
have been done
by
__________________________________
This data will
help us to
confirm what
parts of the
system we need
to focus on.
Please fax a
printed copy of
this Checklist
and we will
review the data
and let you know
what do next.
|
