Rev. 3 / 1 Nov 2005 VTI Technologies reserves the right to modify this specifi cation without prior to notice.
SCA111T and SCA121T Series
Stand Alone Inclinometer
FEATURES
• Silicon 3D MEMS sensor
• 0,1 ° accuracy
• Resolution < 0,001 °
• Operating temperature range -40...+85 °C
• Long term stability < 0,02 °
• Shock resistance >20 000 g
• Sensing element -3 dB @ 18 Hz
• Main dimensions: 30x30x13 mm size, single or dual axis
• Voltage output
• RoHS compatible
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)
Single or Dual Axis Analog Output
ELECTRICAL CHARACTERISTICS
Parameter Condition Min. Typ Max. Units
Supply voltage Unregulated or
regulated ratiometric
7
4.75
16
5
35
5.25
V
V
Applies to: -D02, -D03, -D07
Applies to: -D04, -D05
Current consumption 5mA
Output load Resistive 10 kΩ
Capacitive 20 nF
PERFORMANCE CHARACTERISTICS
Parameter Condition SCA111T-D02 SCA121T-D03 SCA121T-D07 SCA111T-D04 SCA121T-D05 Units
Measuring range (1 ±30 ±90 ±30 ±90 ±90 °
Supply voltage 7 ...35 7 ...35 7 ...35 5 ±0.25 5 ±0.25 V
Measuring axis (see “Directions”) X X-Y X-Y X X-Y
Offset (2, 5 Output at 0 ° 2.5 2.5 2.5 2.5 2.5 V
Offset zero point error (5 Max. deviation 11111°
Offset temperature error 0…70 °C
-25...85 °C
±0.2
±0.6
±0.2
±0.6
±0.2
±0.6
±0.2
±0.6
±0.2
±0.6
°
°
Sensitivity Sine of inclination 70 35 70 35 35 mV/°(@offset pos.)
Sensitivity temperature error (5 0…70 °C
-25...85 °C
-0.8 ...0.3
-1.5 ...0.5
-0.8 ...0.3
-1.5 ...0.5
-0.8 ...0.3
-1.5 ...0.5
-0.8 ...0.3
-1.5 ...0.5
-0.8 ...0.3
-1.5 ...0.5
%
%
Nonlinearity Sinus output 0.1 N/A 0.1 N/A N/A °
Frequency response –3 dB (3 18 18 18 18 18 Hz
Cross-axis sensitivity (4 33333%
Typical values unless otherwise specifi ed.
For customised product please contact VTI Technologies
Note 1 The measuring range is limited by the sensitivity and offset.
Note 2 Offset specifi ed as Output @ 0 °.
Note 3 The frequency response is determined by the sensing element’s internal gas damping.
The output has true DC (0 Hz) response.
Note 4 The cross-axis sensitivity determines how much inclination, perpendicular to the measuring
axis, couples to the output.
Note 5 For optimum zero point accuracy, mounting angle of the part can be adjusted.
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
Mounting position 1
(Horizontal)
X-axis Y-axis
Negative incl., Zero position, Positive incl. Positive incl., Zero position, Negative incl.
Earth’s gravity
Mounting position 2
(Vertical)
Mounting position 1
Mounting position 2
Deviation Deviation
VTI Technologies Oy
Myllynkivenkuja 6
P.O. Box 27
FI-01621 Vantaa
Finland
Tel. +358 9 879 181
Fax +358 9 879 18791
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
ELECTRICAL CONNECTION
SCA111T and SCA121T Series
Wire color Name Function Wire color Name Function
Blue GND Ground Blue GND Ground
Red Vcc Power supply Red Vcc Power supply
Yellow Out X X-axis output Yellow Not connected
Green Out Y Y-axis output Green Not connected
White Not connected White Output X-axis output
Cable length: -D02, -D03, -D07 30 cm.
-D04, -D05 110 cm
Total weight: Approx. 60 grams
Protection class: IP66
Housing: Zinc casting with passivation
MECHANICAL SPECIFICATION MOUNTING
SENSOR DIMENSIONS
Figure 2.
Ø 4.2
Dimensions in mm.
The sensor module is to be mounted on a fl at and smooth surface
with 2 screws, dimension M4. Mounting torque 5 ±1 Nm.
SCA111T seriesSCA121T series
ORDERING INFORMATION
SCA1X1T-D0Y
Product type:
See Perf.char. table
Number of axis:
1=single axis, 2=dual axis
