The next internal count reading is 1413 counts. The difference between it
and the current average (1330) is 73 counts. This value falls between
Average Shift 1 (4) and Average shift 2 (500) Therefore the new value is
shifted in once.
12501250 1250 1250 out --
- average of 10 registers = 1346 counts = 134 lb. (disp. wt.)
- The next 4 new readings all fall within the same range as the scale
has reached stability after the application of the weight.
After 4 more cycles and 4 more shifts the register looks like this:
- Average of 10 registers = 1411 counts = 141 lb. (disp. wt.)
From the above example note the rapid change in the average counts
reading over the first two cycles and the slower change over the subsequent
cycles as the average counts approaches the correct reading.
If a change in weight on the scale is large enough to make the difference
between the current average and the new internal counts reading to be
greater than 1000 counts (Average Shift Value 3) then the new reading is
shifted into the averaging register 10 times in one cycle (full update). In this
mode no averaging takes place since all 10 registers record the same
reading. This full update mode will continue until the change in the internal
counts reading falls into the range of values below that set by Average Shift
Value 3. Then the averaging system will take over and the weight display will
update more slowly as it approaches the correct reading.
RATE OF CHANGE
--- NO REGISTERS LOADED
Average Shift Value 1
---LOAD 1 REGISTER
Average Shift Value 2
--- LOAD ½ OF REGISTERS
Average Shift Value 3
--- LOAD ALL REGISTERS
Guidelines for setting Average Shift Value 1, 2 and 3
Parameters 41, 42 and 43
Average Shift Value 1 (Parameter 41) - factory set at 3 counts.
This parameter should be set for no more than 1/2 of a graduation. i.e. If a
scale has been met for 5000 graduations at 60,000 counts then 12 counts =
1 graduation. In this case Average shift Value 1 should be set for 4 or 5
counts. If set too low then the scale display will appear unstable. If set too
high then the sensitivity will be reduced and the display may not respond to a
one graduation change in applied weight.
Average Shift Value 2 (Parameter 42) - factory set at 500 counts.
This parameter should be set to two times the amount of change caused by
normal motion while load is on the scale. i.e. for a livestock scale observe
the amount of change in raw counts as the livestock are being weighed and
set the value for this parameter to twice the observed change. Other
applications - change caused by liquid sloshing in tanker truck, change
caused by truck engine running.