Preliminary SCA110 and SCA111 Series Stand Alone Accelerometer FEATURES BENEFITS • Stand alone accelerometer in zinc housing • Long term stability • Available ranges ±1.2g, ±2g • Excellent overload durability • Accurate over a wide temperature range -40°C ... +125°C • Zinc hausing (IP66) with overload protection make without any compensation the accelerometer durable enough to stand a drop • Electrical connection through the moulded-in PUR cable from 2 meters onto a concrete floor • Standard analogue output • Meet typical automotive EMC requirements • Acceleration in the direction of the arrow will increase the • Easy to use output voltage APPLICATIONS • Acceleration measurement • Inclination measurement • Vibration measurement • Motion measurement ELECTRICAL CHARACTERISTICS SCA110- SCA111- SCA111- Parameter Comment Units C12H1W C12H1W CC4H1W (6 Sensitivity error @ room temperature % ±2 ±2 ±2 -20 . . . 85 °C ±3 ±3 ±3 -40 . . . 125 °C ±4 ±4 ±4 Typ. Non-linearity (7 Deviation from ±1g line ± 20 ±20 ±60 mg Frequency response -3dB point (8 400 ± 150 400 ± 150 115 ± 55 Hz Output load resistive (min.) 20 20 20 kΩ capacitive (max.) 20 20 20 nF Supply voltage effect Offset mg ±35 ±25 ±50 Cross-axis sensitivity (9 ±4 ±4 ±4 % Typ. Output noise V(AC)RMS (DC ... 4 kHz) 5 5 5 mV Ratiometric error(11 Vdd=4.75...5.25V ±2 % Supply voltage effect Offset ±25 ±50 mg PERFORMANCE CHARACTERISTICS SCA110- SCA111- SCA111- Parameter Comments Unit C12H1W C12H1W CC4H1W (1 Supply voltage Ratiometric 7 – 27 7 – 27 V 5 ± 0.25 Supply current Typical, without load 2 2 2 mA (2 Measuring range ±1.2 ±1.2 ±2 g (3 Measuring direction Horizontal Horizontal Horizontal (9 Zero point Nominal value 0.5 * Vdd 2.5 2.5 V (4 Sensitivity Nominal value 0.3 * Vdd 1,5 1 V/g (5 Offset error @ room temperature mg ±50 ±50 ±75 -20 . . . 85 °C ±80 ±80 ±130 -40 . . . 125 °C ±120 ±120 ±195 Note 1 SCA110 (5V) Accelerometers are ratiometric; Offset and Sensitivity are proportional to supply Note 7 Relative to the straight line between ±1g. voltage. Note 8 Output has true DC (0Hz) response. Note 2 Output swing 0.5 - 4.5 V with nominal supply voltage. Note 9 The cross-axis sensitivity determines how much acceleration, perpendicular to the measuring Note 3 Measuring direction is perpendicular to the mounting plane (see Note 10). Zero is defined with axis, couples to the output. The total cross-axis sensitivity is the geometric sum of the no acceleration and the device mounted in the prescribed mounting plane (see Note 10 and sensitivities of the two axes, which are perpendicular to the measuring axis. pictures page 2). Note 10 Offset measuring direction in figures (see picture page 2) Note 4 Sensitivity specified as [Vout (+1g) - Vout(-1g)] / 2 [V/g]. Note 11 Supply voltage noise also couples to the output, due to the ratiometric (output proportional to Note 5 Zero point error specified as (Vout (+0g) - Vdd/2) / Vsens [g] (room temp. error included); supply voltage) nature of the accelerometer. Vsens = Nominal sensitivity. Note 6 Sensitivity error specified as { [Vout(+1g)-Vout(-1g)] / 2 - Vsens} / Vsens x 100% Vsens = Nominal sensitivity. 5.00V Vout(@Vx) x Vx The ratiometric error is specified as: RE = 100% x 1- Vout(@5V) Rev. 26 Aug 2004 VTI Technologies reserves the right to modify this specification without prior to notice. SCA110- and SCA111 Series Horizontal Vertical DIMENSIONS 38.0 29.5 14.0 The accelerometer weighs approximately 60g with a standard 30cm PUR cable (3 x 0.5 mm2), excluding connector. WIRING INFORMATION Red = Supply voltage White = Ground Yellow = Output ø4.2 DIRECTION Recommended mounting screw size: M4 VTI Technologies Oy VTI Technologies Oy VTI Technologies, Inc. Myllynkivenkuja 6 Frankfurt Branch One Park Lane Blvd. P.O. Box 27 Rennbahnstr. 72-74 Suite 804 - East Tower FI-01621 Vantaa D-60528 Frankfurt am Main Dearborn, MI 48126 Finland Germany USA Tel. +358 9 879181 Tel. +49 69 6786 880 Tel. +1 313 425 0850 Fax +358 9 87918791 Fax +49 69 6786 8829 Fax +1 313 425 0860 sales@vti.fi sales.de@vti.fi sales@vtitechnologies.com 41.0 29.5 13.5