SCA115T-D03-A - VTI Technologies

Stand Alone Inclinometer

SCA115T and SCA125T Series

FEATURES

• Silicon 3D MEMS sensor

• RS-485 serial interface

• 11 bit resolution

• Operating temperature range -40...+85°C

• Inclination and temperature output

• Long term stability < 0,02°

• Shock resistance >20 000g

• 30x30x13mm size, single or dual axis

• Horizontal or vertical mounting

BENEFITS

• Excellent long term stability

• Sensing element controlled frequency response

• Outstanding shock durability

• Harsh environment robustness

APPLICATIONS

• Platform tilt measurement

• Equipment and instrument condition monitoring

• Inclination based position measurement

• Rotational orientation measurement (dual axis)

For customised product please contact VTI Technologies

Figure 1. Positions

Notes:

• It is important that the part is parallel to the mounting plane, and that the output equals the zero value when sensor is in zero position.

• Zero position: Please note the picture above which provides information on how the output of the accelerometer behaves in different

circumstances when assembled. Please also note that you can rotate the part around the measuring plane for optimum mounting location

MEASURING DIRECTIONS

Negative incl., Zero position, Positive incl.

X-axis Y-axis

Positive incl., Zero position, Negative incl.

Earth’s gravity

Mounting position 1

(Horizontal)

Mounting position 2

(Vertical)

Mounting position 1

Mounting position 2

Deviation Deviation

Note 1. The measuring range is limited by the sensitivity and offset.

Note 2. Offset speciﬁed as Output @ 0°.

Note 3. The frequency response is determined by the sensing element’s internal gas damping.

The output has true DC (0Hz) response.

Note 4. The cross-axis sensitivity determines how much inclination, perpendicular to the measuring

axis, couples to the output.

Note 5. Mounting position should be calibrated. See measuring positions.

ELECTRICAL CHARACTERISTICS

Parameter Condition Min. Typ Max. Units

Supply voltage 7 16 35 V

Current consumption 20 mA

Output RS-485, half-duplex kΩ

Data transfer speed 11 bit word 10 Hz

PERFORMANCE CHARACTERISTICS

Parameter Condition SCA115T-D03 SCA125T-D06 SCA125T-D08 Units

Measuring range (1 ±30 ±90 ±30 °

Measuring axis (see “Directions”) X X-Y X-Y

Offset (2, 5 Output at 0°, HEX 03FF FS/2 FS/2 FS/2

Offset temperature error 0…70°C ±0.2 ±0.2 ±0.2 °

-25...85°C ±0,6 ±0,6 ±0,6 °

Resolution (5 @ 0° (offset position) 0,035 0,07 0,035 °/LSB

11 11 11 Bit/FS

Sensitivity Sine of inclination 30 90 30 °/FS

Sensitivity temperature error (5 0…70°C ±0,2 ±0,2 ±0,2 %

-25...85°C ±0,5 ±0,5 ±0,5 %

Nonlinearity Sinus output 0,1 N/A 0,1 °

Frequency response –3dB (3 18 18 18 Hz

Cross-axis sensitivity (4 4 4 4 %

Typical values @ ambient temperature unless otherwise speciﬁed.

Rev. 4 Jan 2005 VTI Technologies reserves the right to modify this speciﬁcation without prior notice.

Single or dual axis RS-485 output

VTI Technologies Oy

Myllynkivenkuja 6

P.O. Box 27

FI-01621 Vantaa

Finland

Tel. +358 9 879181

Fax +358 9 87918791

sales@vti.ﬁ

VTI Technologies Oy

Frankfurt Branch

Rennbahnstr. 72-74

D-60528 Frankfurt am Main

Germany

Tel. +49 69 6786 880

Fax +49 69 6786 8829

sales.de@vti.ﬁ

VTI Technologies, Inc.

One Park Lane Blvd.

Suite 804 - East Tower

Dearborn, MI 48126

USA

Tel. +1 313 425 0850

Fax +1 313 425 0860

sales@vtitechnologies.com

Ø 4

Ø 4.2

SCA115T and SCA125T Series

Figure 2.

Figure 3.

Optional mounting bracket

Dimensions (in mm):

SENSOR DIMENSIONS ORDERING INFORMATION

MECHANICAL SPECIFICATION MOUNTING

Cable length: 30 cm The sensor module is to be mounted on a ﬂat and smooth surface with 2 screws, dimension M4.

Mounting torque 5 ± 1 Nm.

Total weight: approx. 60 grams (excluding connector)

Protection class: IP66 (excluding connector)

Metal part: Housing: Yellow chromated zinc casting

Bracket: Yellow passivated steel

ELECTRICAL CONNECTION SOFTWARE LEVELS

Wire color Name Function Modules are available with different software levels:

Yellow A Bus connection Level Output

White B Bus connection A• Acc/Incl and temperature in counts (HEX data)

• Communication conﬁgurability (RS-485 bus)

• Device address changeability

Green NC

Blue GND Ground

Red Vcc Power supply B• “A” + output in mg, temperature in ˚F or ˚C

• Adjustable averaging of acc/incl signal(s)

• Adjustable offset for acc/incl signal(s)

C• “A” + “B” + output in mrad or degree

• Adjustable offset for acc/incl signal(s)

See separate manual for more detailed information

SCA1X5T-D0Y, Z

Software level:

A, B or C

Product type:

See Perf.char. table

Number of axis:

1=single axis, 2=dual axis