HBM WE2108 Serie Referenzhandbuch Seite 89

Scale electronic unit (NSW)
(Linearization Value)
Compensation of a linearity error
The parameter LVA0 determines the basic function used:
(x = input signal, y = display value)
LVA0 corresponds to "Lin" in the CAL menu, factory setting is 0.
Meaning and setting range of the parameters LVA1...LVA7:
The parameter LVA0 determines the number of values to be entered (other values are identi-
fied with − −).
Remarks:
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WE2108
LVA
Command:
Parameter:
Range:
Factory setting:
Password protection: yes
Parameter backup:
Query:
LVA0 Scale characteristic
0 linear (straight line)
1 2nd order polynomial
2 3rd order polynomial
Command Meaning of the parameter
LVA 2 Characteristic point 1 display
LVA 4 Characteristic point 2 display
LVA 6 Characteristic point 3 display
LVA 1 Internal value without load
LVA 3 Internal characteristic point 1 value
LVA 5 Internal characteristic point 2 value
LVA 7 Internal characteristic point 3 value
The percentages are related to the nominal load of the scale.
The internal values 0...270000 represent the measuring range 0...2.7 mV/V.
The used values must be assigned in ascending order, e.g. LVA6 > LVA4 (with LVA0 = 2).
With LVA0 = 0 (calibration with two points) a partial load calibration is also possible (LVA2
= 20 %...120 % of the scale nominal load). The setting is equivalent with calibration by
LDW / LWT.
The display values (LVA2/4/6) are entered related to the nominal load, but without
comma, (see examples).
LVA(0...7),(value);
2
see tables
see tables
with command TDD1
LVA?(0...7);
LVA0 = 0
20...120 %
−−
−−
< LVA3
0.. 270000
−−
−−
Mathematical form
y = a + b⋅x
y = a + b⋅x + c⋅x@
y = a + b⋅x + c⋅x@ + d⋅x#
LVA0 = 1 LVA0 = 2 Factory setting
10...90 % 10...90 % 6000
100 % 10...90 % 0
−− 100 % 0
< LVA3 < LVA3 0
< LVA5 < LVA5 200000
0.. 270000 < LVA7 0
−− 0.. 270000 0
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HBM