SCA103T View Datasheet(PDF) - VTI technologies

Part Name

Description

Manufacturer

SCA103T

THE SCA103T DIFFERENTIAL INCLINOMETER SERIES

VTI technologies 

SCA103T Series

2 Functional Description

2.1 Differential Measurement

The measuring axis of SCA103T sensing elements are mutually opposite in direction, thus

providing two inclination signals which can be differentiated externally, either by using a differential

amplifier or a microcontroller.

The differential measurement principle removes all common mode measurement errors. Most of

the error sources have similar effects on both sensing elements. These errors are removed from

measurement result during signal differentiation. The differential measurement principle gives very

efficient noise reduction, improved long term stability and extremely low temperature dependency.

Typical output characteristics (Channels 1, 2 and differential output: OUT1-OUT2) are presented in

the figure below. For differential amplifier connection refer to the recommended circuit diagram.

SCA103T-D04 outputs and differential amplifier output

6.0

5.0

2

4.0

3.0

2.0

1.0

0.0

1

-1.0

-2.0

-3.0

-4.0

-5.0

D

-6.0

-20

-15

-10

-5

0

5

Tilt angle [ ° ]

10

15

20

SCA103T OUT_1

SCA103T OUT_2

Differential output

Figure 7.

Differential output characteristics

2.2 Voltage to Angle Conversion

The analog output behavior of the SCA103T is described in the figure below. The arrow represents

the measuring axis direction marking on the top of SCA103T package.

Earth's gravity

OUT1 <

OUT2 >

DIFF <

Figure 8.

OUT1 =2.5V < OUT1

OUT2 =2.5V > OUT2

DIFF =0 V <DIFF

Behavior of the analog output

The analog output can be transferred to angle by using the following equation for conversion:

VTI Technologies Oy

www.vti.fi

Subject to changes

Doc.Nr. 8261700

9/19

Rev.A

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