m
2000D
technical manual
Page 13
S
ECTIONAL
S
CALE
I
NSTALLATION
G
UIDE
Sectional scale installations do allow sections across multiple DLC slaves. The following
set of instructions is a general guideline on how to allocate and calibrate sectional scales:
1.
Install load cell cables to DLC slave units starting from the lowest cell number on the primary
slave as labeled on the DLC boxes
. Numbering should be incremental from one end of the
platform to the other end
.
2.
Once all load cells are connected, choose the scale to which you would like to allocate the
sectional scale, using commands 19, 29 or 39 to enter the calibration mode for the setup
procedure.
3.
Note, if this is a new installation, normally the first command in calibration mode before
allocating the load cells, is to clear all existing allocations using calibration command 500, else
use commands 501,502 or 503 respectively
4.
You are now ready to execute the sectional scale allocation command 521. This command
requires you to enter the number of sections you would like to assign to the scale (
a section
consists of two load cells referred to as corners
) as outlined in
Figure 2
.
5.
Once command 521 is executed, you can view the raw counts of the scale on a section by
section basis. Use the [ON/OFF] key to select raw counts, and then use the [TARE] key to
move incrementally from one section/corner to another. This is an initial test to see if all load
cells are responding.
6.
Note, if this is a new installation, command 530 needs to be executed to clear any existing
corner correction factors that might be resident in the remote DLC slave –
very important
.
7.
At this point (as an optional step), the user can use command 11 to set the desired AD range
value for all the converters associated with the scale, to optimize the resolution of the AD
converters. Each AD converter can produce 512 000 raw counts at full AD input range.
8.
Press the [ON/OFF] key until you see graduated counts (prefixed by the letter C).
Graduated
counts always represent the sum of all the corners/cells.
9.
The scale is now ready to be dead loaded using command 12 (this might take about 3 to 5
seconds). Do not disturb the platform(s) while the process is in progress. If the graduated
counts do not display zero counts, repeat the process.
10.
The scale is now ready to be spanned using command 13. Place a graduated weight of ±1/3 of
the scale capacity in the center of the scale (if practical) and execute command 13 to span the
scale.
11.
You are now ready to do section/corner corrections where needed, moving a graduated weight
from the center of one section to another
or
to a corner of a section. Press the [ON/OFF] key
until you see graduated counts (prefixed by the letter C). Use the [TARE] key to select the
summed display of a section
or
a corner (post fixed with the letter C on the display) of interest.
12.
Once the section/corner is selected, use command 532/531 (default 532) to adjust the
section/corner weight to the expected weight - if required. When using command 532 you must
type in a target weight - command 532 will automatically adjust the section/corner to the target
weight. When using command 531, you must use the [IN/OUT] keys to increase or decrease
the weight. Command 532 is normally the first method used to correct sections/corners. If the
results are not satisfactory, command 531 can be used for a final correction. If required, the
user may correct on a corner by corner basis.
13.
Press the [ON/OFF] key until graduated counts are displayed (prefixed by the letter C).
14.
If the results are not satisfactory, move back to step 10 and repeat.
SECTION SCALE
INSTALLATIONS
NOTE:
Saving calibration data on a regular basis using calibration command 99 is a
good calibration practice.
