SCA61T Series
Temperature dependency of SCA61T sensitivity
1.0
0.5
specification
limit
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
average
+3 sigma
-3 sigma
specification
limit
-40
-20
0
20
40
60
80
100
120
Temp [°C]
Figure 5.
Typical temperature dependency of SCA61T sensitivity
1.9 Additional External Compensation
To achieve the best possible accuracy, the temperature measurement information and typical
temperature dependency curves can be used for SCA61T offset and sensitivity temperature
dependency compensation. The equation for the fitted 3rd order polynome curve for offset
compensation is:
Offcorr = −0.0000005*T 3 + 0.0000857*T 2 − 0.0032*T + 0.0514
Where:
Offcorr:
T
3rd order polynome fitted to average offset temperature dependency curve
temperature in °C (Refer to paragraph 2.7 Temperature Measurement)
The calculated compensation curve can be used to compensate for the temperature dependency
of the SCA61T offset by using the following equation:
OFFSETcomp = Offset −Offcorr
Where:
OFFSETcomp
Offset
temperature compensated offset in degrees
Nominal offset in degrees
The equation for the fitted 2nd order polynome curve for sensitivity compensation is:
Scorr = −0.00011*T 2 + 0.0019*T + 0.0362
Where:
Scorr:
T
2nd order polynome fitted to average sensitivity temperature dependency curve
temperature in °C
The calculated compensation curve can be used to compensate the temperature dependency of
the SCA61T sensitivity by using the following equation:
SENScomp = SENS *(1+ Scorr /100)
Where:
SENScomp temperature compensated sensitivity
SENS
Nominal sensitivity (4V/g SCA61T-FAHH1G, 2V/g SCA61T-FA1H1G)
The typical offset and sensitivity temperature dependency after external compensation is shown in
the following diagrams.
VTI Technologies Oy
www.vti.fi
Subject to changes
Doc. nr. 8261900
7/18
Rev.A
VTI [ VTI TECHNOLOGIES ]
