sca100t VTI Hamlin, sca100t Datasheet - Page 9

• Manufacturer Part Number: sca100t
• Description: The Sca100t Dual Axis Inclinometer Series
• Manufacturer: VTI Hamlin

2
2.1 Measuring Directions
2.2 Voltage to Angle Conversion
VTI Technologies Oy
www.vti.fi
Functional Description
X-axis
Y-axis
Analog output can be transferred to angle using the following equation for conversion:
where: Offset = output of the device at 0° inclination position, Sensitivity is the sensitivity of the
device and V
V/g for the SCA100T-D01 and 2 V/g for the SCA100T-D02.
Angles close to 0° inclination can be estimated quite accurately with straight line conversion but for
the best possible accuracy, arcsine conversion is recommended to be used. The following table
shows the angle measurement error if straight line conversion is used.
Straight line conversion equation:
Where: Sensitivity = 70mV/° with SCA100T-D01 or Sensitivity= 35mV/° with SCA100T-D02
α
=
Figure 8. The measuring directions of the SCA100T
arcsin
⎛
⎜ ⎜
⎝
V
Dout
Sensitivit
out
Tilt angle [°]
is the output of the SCA100T. The nominal offset is 2.5 V and the sensitivity is 4
−
0
1
2
3
4
5
10
15
30
Offset
y
α
⎞
⎟ ⎟
⎠
VOUT >
=
V
Sensitivit
Straight line conversion error [°]
out
0
0.0027
0.0058
0.0094
0.0140
0.0198
0.0787
0.2185
1.668
−
Subject to changes
Offset
Doc. nr. 8261800
y
VOUT =2.5V
> VOUT
SCA100T Series
Rev.A
9/18