SCA110 and SCA111 Series 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 mouldedin PUR cable * Standard analogue output APPLICATIONS * Acceleration measurement * Inclination measurement * Vibration measurement * Motion measurement For customised products please contact VTI Hamlin BENEFITS * Long term stability * Excellent overload durability * Zinc housing (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 DIMENSIONS 38.0 29.5 The accelerometer weighs approximately 60g with a standard 30cm PUR cable (3 x 0.5 mm2), excluding connector. Acceleration in the positive direction of the arrow will increase the output voltage. 13.5 29.5 41.0 14.0 o4.2 ACCELERATION DIRECTION WIRING INFORMATION Red = Supply voltage White = Ground Yellow = Output Recommended mounting screw size: M4 PRODUCT CODE KEY PART NUMBER X X X ASIC TYPE C=HML294 SENSING ELEMENT 1= Small 1g; G001BA (XC) 2= Small 1g; 50Hz; G001BB B= Inclinometer 0.5g; G001BC (XB) C=Small 3g; G003BC; 115Hz D=Small 12g, G012XX (XX) X SENSITIVITY 1=2000 mV/g 2=1500 mV/g 3=1333 mV/g 4=1000 mV/g 5=750 mV/g 8=1200mV/g C=150mV/g D=1575mV/g E=1666mV/g F=1471.5mV/g G=1875mV/g H= 4000 mV/g J=400mV/g Standard versions in bold VTI Hamlin Oy, P.O. Box 27, FIN-01621 Vantaa, Finland Phone +358 9 879 181, Fax +358 9 8791 8791, www.vti.fi/vtihome.htm X X MECHANICAL FEATURE C=Housing with integral connector W=Housing with pig-tail FREQUENCY RESPONSE 1= 400Hz 2= 1kHz 3= Wide Band 4= External Capacitor OFFSET H= Output @ 0g = 2.500V V= Output @ +1g = 2.500V SCA110 and SCA111 Series ELECTRICAL SPECIFICATIONS Parameter Comment Supply voltage Supply current Measuring range (2 Measuring direction (3 Zero point (9 Sensitivity (4 Zero Point error (5 Ratiometric (1 Typical, without load Sensitivity error (6 Typ. Non-linearity (7 Frequency response Output load Supply voltage effect Cross-axis sensitivity (9 Max. Output noise Ratiometric Error (11 Supply voltage effect SCA110C12H1W 5 0.25 2 1.2 Horizontal 0.5 * Vdd 0.3 * Vdd 50 80 120 2 3 4 20 400 150 20 20 35 4 5 2 Nominal value Nominal value @ room temperature -20 . . . 85 C -40 . . . 125 C @ room temperature -20 . . . 85 C -40 . . . 125 C Deviation from 1g line -3dB point (8 resistive (min.) capacitive (max.) Offset V(AC)RMS (DC ... 4 kHz) Vdd=4.75...5.25V Offset SCA111C12H1W 7 - 27 2 1.2 Horizontal 2.5 1,5 50 80 120 2 3 4 20 400 150 20 20 25 4 5 SCA111CC4H1W 7 - 27 2 2 Horizontal 2.5 1 75 130 195 2 3 4 60 115 55 20 20 50 4 5 25 50 Unit V mA g V V/g mg % mg Hz k nF mg % mV % mg Note 1. SCA 110 (5V) Accelerometers are ratiometric; Offset and sensitivity are proportional to supply voltage. Note 2. Output swing 0.5 - 4.5 V with nominal supply voltage. Note 3. 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. Note 4. Sensitivity specified as [Vout(+1g)-Vout(-1g)] / 2 - [V/g]. Note 5. Zero point error specified as (Vout (+0g) - Vdd/2) / Vsens [g] (room temp. error included); Vsens = Nominal sensitivity. Note 6. Sensitivity error specified as { [Vout(+1g)-Vout(-1g)] / 2 - Vsens} / Vsens x 100% Vsens = Nominal sensitivity. Note 7. Relative to the straight line between 1g. Note 8. Output has true DC (0Hz) response. Note 9. 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. Note 10. Offset measuring direction in figures HORIZONTAL VERTICAL Note 11. Supply voltage noise also couples to the output, due to the ratiometric (output proportional to supply voltage) nature of the accelerometer. 5.00V Vx Vout(@5V) Vout(@Vx) x The ratiometric error is specified as: RE = 100% x 1 - VTI Hamlin Oy, P.O. Box 27, FIN-01621 Vantaa, Finland Phone +358 9 879 181, Fax +358 9 8791 8791, www.vti.fi/vtihome.htm Rev. 2 January 2001 VTI Hamlin reserves the right to modify this specification without prior notice.