Western Scale m2000D, Техническое руководство

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m
2000D technical manual
Page 19
H
OPPER
S
CALE
I
NSTALLATION
G
UIDE
The following set of instructions is a general guideline on how to allocate and calibrate a
hopper scale with no more than 4 load cells per hopper scaled.
1. Install load cell cables to DLC slave unit starting from cell 1 as labeled on the DLC slave. The
first corner is always assigned to the cell with the lowest number.
2. Once all load cells are connected, choose the scale to which you would like to allocate the
hopper 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.
4. You are now ready to execute the hopper scale allocation command 520. This command
requires you to enter the number of corners you would like to assign to the scale.
5. Once command 520 is executed, you can view the raw counts of the scale on a corner by
corner basis first, using the [ON/OFF] key to select raw counts, and then using the [TARE] key
to move incrementally from one corner to another –
each corner is assigned to a cell on the
DLC terminal box . 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 cells/corners associated with the scale, to optimize the resolution of the AD
converters. Each cell can produce 512 000 raw counts at full 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 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 and execute command 13 to span the scale.
11. You are now ready to do corner/cell corrections where needed, moving a graduated weight
from one corner to another. Use the [TARE] key to select the corner of interest. Once the
corner is selected, use command 532/531 ( default 532) to adjust the 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 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 corners. If the results are not satisfactory, command
531 can be used for a final correction.
12. Press the [ON/OFF] key until graduated counts are displayed (prefixed by the letter C ).
Graduated counts always represent the sum of all the corners/cells.
13. If the results are not satisfactory, move back to step 10 and repeat
14. Once calibration is finished, you can use command 600 outside calibration mode to inspect the
scale behavior without violating the government certification.
NOTE: A hopper scale is not allowed to have load cells spread across multiple DLC
slaves terminal boxes – must be grouped on a single DLC slave . A sectional scale does
not have this limitation.
Saving calibration data on a regular basis using calibration
command 99 is a good calibration practice.
HOPPER SCALE
INSTALLATIONS