6.WEIGHING MODE SETTING AND OPERATION
75
6-3. FF CPS. Regulation Value / Free Fall Compensation /
Avg. Count of FF CPS. / FF CPS. Coefficient
Free fall compensation automatically correct fluctuation of free fall, which is one
of the major causes of measurement error, thus enabling accurate weighing.
Principle of Free fall compensation
Sampling the Weight value when the complete signal turns ON after Set point 3
finished. Record “n” times (A) the difference (D) between set Final value and
actual weight value, average the difference and multiplied by compensation
coefficient(C), then add/subtract the result of FF CPS. value.
To minimize error, user can set a regulation value to D. Compensation can be
performed automatically as long as the following relation holds:
Final+regulation >= measured value >= Final – regulation
If Auto jog function is enabled in Sequence mode, weight is sampled befor Auto
jog starts.
Value added/subtracted to/from the FF CPS. set value
（
D
1
＋
D
2
＋
D
3
・
・
・・
・
・
D
A
）
A
×
C
In Free fall compensation, acquisition of compensation sample is triggered
by Over/Under Judge signal. Therefore, if Judging times is set to zero,
F159 can not acquire compensation samples, disabling compensation.
The user must set larger than zero value to Judging times to use Free fall
compensation function.
For further information, see the description in "Judging times", page 83.
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