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| SCA115T and SCA125T Series Stand Alone Inclinometer Single or dual axis RS-485 output FEATURES * Silicon 3D MEMS sensor * RS-485 serial interface * 11 bit resolution * Operating temperature range -40...+85C * Inclination and temperature output * Long term stability < 0,02 * Shock resistance >20 000g * 30x30x13mm size, single or dual axis * Horizontal or vertical mounting For customised product please contact VTI Technologies 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) ELECTRICAL CHARACTERISTICS Parameter Supply voltage Current consumption Output Data transfer speed RS-485, half-duplex 11 bit word 10 Condition Min. 7 Typ 16 20 Max. 35 Units V mA k Hz PERFORMANCE CHARACTERISTICS Parameter Measuring range (1 Measuring axis Offset (2, 5 Offset temperature error Resolution (5 Sensitivity Sensitivity temperature error (5 Nonlinearity Frequency response -3dB Cross-axis sensitivity (4 (3 Condition (see "Directions") Output at 0, HEX 03FF 0...70C -25...85C @ 0 (offset position) Sine of inclination 0...70C -25...85C Sinus output SCA115T-D03 30 X FS/2 SCA125T-D06 90 X-Y FS/2 SCA125T-D08 30 X-Y FS/2 Units 0.2 0,6 0,035 11 30 0.2 0,6 0,07 11 90 0.2 0,6 0,035 11 30 /LSB Bit/FS /FS % % Hz % 0,2 0,5 0,1 18 4 0,2 0,5 N/A 18 4 0,2 0,5 0,1 18 4 Typical values @ ambient temperature unless otherwise specified. Note 1. Note 2. Note 3. The measuring range is limited by the sensitivity and offset. Offset specified as Output @ 0. The frequency response is determined by the sensing element's internal gas damping. The output has true DC (0Hz) response. Note 4. Note 5. The cross-axis sensitivity determines how much inclination, perpendicular to the measuring axis, couples to the output. Mounting position should be calibrated. See measuring positions. MEASURING DIRECTIONS X-axis Mounting position 1 (Horizontal) Y-axis Mounting position 1 Mounting position 2 Mounting position 2 (Vertical) Earth's gravity Deviation Negative incl., Zero position, Positive incl. Deviation Positive incl., Zero position, Negative incl. 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 Rev. 4 Jan 2005 VTI Technologies reserves the right to modify this specification without prior notice. SCA115T and SCA125T Series ELECTRICAL CONNECTION Wire color Yellow White Green Blue Red Name A B GND Vcc Function Bus connection Bus connection NC Ground Power supply SOFTWARE LEVELS Modules are available with different software levels: Level Output A * Acc/Incl and temperature in counts (HEX data) * Communication configurability (RS-485 bus) * Device address changeability 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 MECHANICAL SPECIFICATION Cable length: Total weight: Protection class: Metal part: 30 cm approx. 60 grams (excluding connector) IP66 (excluding connector) Housing: Yellow chromated zinc casting Bracket: Yellow passivated steel MOUNTING The sensor module is to be mounted on a flat and smooth surface with 2 screws, dimension M4. Mounting torque 5 1 Nm. SENSOR DIMENSIONS Dimensions (in mm): ORDERING INFORMATION SCA1X5T-D0Y, Z Software level: A, B or C Product type: See Perf.char. table O4 Number of axis: 1=single axis, 2=dual axis O 4.2 Figure 2. Figure 3. Optional mounting bracket 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 |
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