Preliminary SCA110 and SCA111 Series Stand Alone Accelerometer FEATURES * Stand alone accelerometer in zinc housing * Available ranges 1.2g, 2g * Accurate over a wide temperature range -40C ... +125C without any compensation * Electrical connection through the moulded-in PUR cable * Standard analogue output * Acceleration in the direction of the arrow will increase the output voltage BENEFITS * Long term stability * Excellent overload durability * Zinc hausing (IP66) with overload protection make the accelerometer durable enough to stand a drop from 2 meters onto a concrete floor * Meet typical automotive EMC requirements * Easy to use APPLICATIONS * Acceleration measurement * Inclination measurement * Vibration measurement * Motion measurement ELECTRICAL CHARACTERISTICS Parameter Comment Sensitivity error (6 @ room temperature -20 . . . 85 C SCA110C12H1W SCA111C12H1W SCA111CC4H1W 2 3 2 3 4 20 400 150 2 3 4 60 115 55 4 -40 . . . 125 C Units % Typ. Non-linearity (7 Deviation from 1g line Frequency response -3dB point (8 20 400 150 Output load resistive (min.) 20 20 20 k capacitive (max.) 20 20 20 nF 35 4 25 4 50 4 mg 5 5 5 mV 25 50 mg SCA110C12H1W SCA111C12H1W SCA111CC4H1W Unit 5 0.25 2 7 - 27 7 - 27 V 2 2 mA g Supply voltage effect Offset Cross-axis sensitivity (9 Typ. Output noise V(AC)RMS (DC ... 4 kHz) Ratiometric error(11 Vdd=4.75...5.25V Supply voltage effect Offset 2 mg Hz % % PERFORMANCE CHARACTERISTICS Parameter Comments Supply voltage Ratiometric (1 Supply current Typical, without load Measuring range (2 Measuring direction (3 1.2 1.2 2 Horizontal Horizontal Horizontal Zero point (9 Nominal value 0.5 * Vdd 2.5 2.5 V Sensitivity (4 Nominal value 0.3 * Vdd 1,5 1 V/g Offset error (5 @ room temperature 50 80 120 50 80 120 75 130 195 mg -20 . . . 85 C -40 . . . 125 C Note 1 Note 2 Note 3 Note 4 Note 5 Note 6 SCA110 (5V) Accelerometers are ratiometric; Offset and Sensitivity are proportional to supply voltage. Output swing 0.5 - 4.5 V with nominal supply voltage. Measuring direction is perpendicular to the mounting plane (see Note 10). Zero is defined with no acceleration and the device mounted in the prescribed mounting plane (see Note 10 and pictures page 2). Sensitivity specified as [Vout (+1g) - Vout(-1g)] / 2 [V/g]. Zero point error specified as (Vout (+0g) - Vdd/2) / Vsens [g] (room temp. error included); Vsens = Nominal sensitivity. Sensitivity error specified as { [Vout(+1g)-Vout(-1g)] / 2 - Vsens} / Vsens x 100% Vsens = Nominal sensitivity. The ratiometric error is specified as: Rev. 26 Aug 2004 RE = 100% x 1- Vout(@Vx) x 5.00V Vx Vout(@5V) VTI Technologies reserves the right to modify this specification without prior to notice. Note 7 Note 8 Note 9 Note 10 Note 11 Relative to the straight line between 1g. Output has true DC (0Hz) response. The cross-axis sensitivity determines how much acceleration, perpendicular to the measuring axis, couples to the output. The total cross-axis sensitivity is the geometric sum of the sensitivities of the two axes, which are perpendicular to the measuring axis. Offset measuring direction in figures (see picture page 2) Supply voltage noise also couples to the output, due to the ratiometric (output proportional to supply voltage) nature of the accelerometer. SCA110- and SCA111 Series Horizontal Vertical DIMENSIONS 38.0 29.5 14.0 o4.2 Recommended mounting screw size: M4 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 13.5 29.5 WIRING INFORMATION Red = Supply voltage White = Ground Yellow = Output 41.0 The accelerometer weighs approximately 60g with a standard 30cm PUR cable (3 x 0.5 mm2), excluding connector. 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 DIRECTION