To correct this error,
Increment the span pointer to the second position Press  [SELECT]
5000 lbs. on scale ? scale reading
Set Span, Press  [SELECT]
Display will flash 2 (second span entry) and return to 4990 LB.
Enter correct weight Press     [ENTER]. Display will then
flash old weight (4990) and then read new correct weight ? scale
Retest scale at 0, 1000 and 5000 lbs. If readings are okay, exit
If reading at 1000 is no longer correct, you must re-enter the first
span point ? decrement the span pointer:  [SELECT] 
[ENTER]. Set span at 1000 lbs. And then repeat the above
procedure. You can always check the current position of the span
pointer by pressing Set Span ( [SELECT]) and observing the
number that momentarily flashes.
Note the span pointer cannot be incremented past 2 and cannot be
decremented past 1.
APPENDIX III - WEIGHT STABILIZATION SYSTEM
The DF2000 indicator features an internal resolution of 60,000 raw
counts. Since the displayed resolution is limited to 5000 graduations. the
indicator can utilize up to 12 internal raw counts per weight graduation
(60,000/5000). This high ratio of raw counts to graduations allows the
indicator to employ a number of software functions to produce a stable weight
display under less than optimum conditions. The parameters for these
functions can be varied by the user. The stability, sensitivity and the speed
of response to applied load can be adjusted in order to tune the indicator to
handle difficult weighing situations.
Average Shift Values 1, 2 and 3 (Parameters 41, 42, and 43)
The DF2000 performs 5 analog to digital conversions per second - the
process by which the signal from the load cell is converted from voltage into
a number value. Each conversion or update produces a new internal raw
count reading. The actual displayed weight is computed from the average of
10 raw count readings stored in a register. After every update, the new raw
count reading is compared with the average reading. The amount of
difference between the new reading and the average reading determines the
rate at which the new reading is shifted into the averaging register - and thus
the rate at which the displayed weight will change. The Average Shift Values
1, 2 and 3 are used to set this rate.
e.g.: Averaging register with 10 internal count readings
- assume the scale has been calibrated so that 10 counts represent a
1.0 lb. graduation.
- average of 10 - internal counts = 513 counts * 51 lb. (displayed
Average Shift Value 1 - Assume that the Average Shift Value 1 has been set
to 4 counts (slightly less than 1/2 graduation in this example). As long as the
difference between a new internal count reading and the current average
reading (513) is less than 4 counts, the new reading will not be shifted into
the register and computed into a new average. Thus the displayed weight will