HBM MGCplus - Extended Functions of the ML38 B

Measuring
General principles for adjusting a measurement channel
MGCplus A0534-30.0 HBM: public 125
7.2.1.1 Extended functions of the ML38B
Nominal (rated) value
First enter the nominal (rated) value. See the table for the linear interpola
tion equation (in the calibration certificate) for the value. If it is not available,
enter the value for the maximum calibration level with the corresponding
arithmetic mean in the electrical unit.
Information
These values for the nominal (rated) value must not be changed any more
once the coefficients have been entered for the polynomial characteristic
curve!
Ext.fct...
Active
Press the confirmation key to activate the characteristic curve (a check mark
appears in the activation field)
Coefficients/standardized
You can use the cubic polynomial characteristic curve to correct the trans
ducer signal (in mV/V). This adjusts the measured values to the true charac
teristic curve. To do this enter the coefficients A0, A1, A2 and A3 of the third
order polynomial, which is described by the following equation:
Y
Ph
= A3@Y
el
3 +
A2@Y
el
2 +
A1@Y
el
+ A0
Y
Ph
: Display in physical unit with polynomial characteristic curve
Y
el
: Measured value in electrical unit
The values of the coefficients can be found on the transducer calibration
certificate.
The amplifier itself requires coefficients (C0 ...C3) standardized to the value
1. The coefficients from the calibration certificate (A0 ...A3) are automati
cally converted before they are forwarded to the amplifier (also in
MGCplus‐Assistant).
2.0000 ...
TRANSDUCER CHANNEL1
kg 
0.0000 ... 0.0000 ...
50.0000 ...
calibrate... Adjust amplifier
0.0000 ...
5V
measure
Ext.fct...
Polynomial characteristic curve
0.0000 ...
OK
Active
Coefficients
A0:
0.0000 ...
A1:
0.0000 ...
A2:
0.0000 ...
A3:
0.0000 ...
Standardized
C0:
0.0000 ...
C1:
0.0000 ...
C2:
0.0000 ...
C3:
Cancel
Type SG full bridge circuit
Current feed
Unit: mV/V
Zero pt.:
Nom. val.:
Gage factor: