* Channel Information Code
1 = Channel 1
2 = Channel 2
4 = Channel 3
3 = Sum of Channels 1 and 2
5 = Sum of Channels 1 and 3
7 = Sum of Channels 1, 2 and 3
APPENDIX II - LINEARITY ADJUSTMENT
The DF2000 features the provision for an extra span entry to allow for the
correction of scale or load cell non-linearity. The amount of correction is
limited to plus or minus three (3) graduations. Attempting to correct an error
greater than three qrads will result in inaccurate weight readouts. If you have
a non-linearity of more than three graduations, you should make a closer
mechanical inspection of the scale and its installation, or you should replace
the load cell(s).
Four Calibration Mode functions are used for linearity adjustments:
[15] RESET SPAN TABLE
Clears the span table
except for the first entry. Do
this before setting the span.
This will clear any previous
calibration.
[16] INCREMENT SPAN POINTER
Moves the span pointer to
the second entry point.
[17] DECREMENT SPAN POINTER
Returns the span pointer to
the first entry point.
[13] SET SPAN
Sets the span. Pay
particular attention to the
number that flashes briefly
after you have pressed [13]
[SELECT].
The following example will illustrate the use of the Linearity
Adjustment.
Scale set for 5 LB graduations -
e.g.
Scale overweight is set for 5020 LB. DF2000 indicator is in Calibrate
Mode. Scale has been zeroed and then Span has been set with
1000 lbs. test weights (as per example in Section III Calibration).
Scale clear of weights
--> scale reading
0 LB
1000 lbs. applied
--> scale reading
1000 LB
5000 lbs. total weight applied
--> scale reading
4990 LB
- Error at capacity is -10 lbs. = -2 grad.
(page 3-73)
