Specifications* 34208A ±250 g, ±500 g Triaxial Accelerometer Wide Bandwidth to 10 kHz Precision Aligned 8 01 0000A000 Measurement Specialties, Inc. 2236 N. Cleveland-Massillon Rd. Akron, Ohio 44333-1255 USA (330) 659-3312 www.meas-spec.com precisionsensors.meas-spec.com 2 3 3 1 2 Parameter Min Typical Max Accelerometers Full Scale Range Option R250 ±250 g Option R500 ±500 g Sensitivity At 25°C Option R250 ±6.6 mV/g Option R500 ±3.3 mV/g Drift Tmin to Tmax 1% (TBD) % Zero g Bias Level At 25°C 2.5 V Drift Tmin to Tmax ±1000 mg Alignment Deviation from Ideal Axes ±0.75 degree Transverse Sensitivity ±0.25 % Nonlinearity 0.2 2 % FSR Frequency Response 0 10 kHz Noise Density 2.8 mg/√Hz Self-Test Input Impedance 10 kΩ Temperature Sensor Sensitivity 6.45 mV/°C 0°C Bias Level 509 mV Outputs Output Voltage Swing 0.25 4.75 V Capacitive Drive Capability 1000 pF Power Supply (Vs) Input Voltage Limits -20 +38 V Input Voltage - Operating +8.5 +36 V Input Current 15 20 mA Rejection Ratio >120 dB Temperature Range (Ta) -40 +85 °C Mass 35 grams Shock Survival -4000 +4000 g Data subject to change without notice. *within one year of calibration 3 1 1 Units Three-Year Limited Warranty Measurement Specialties, Inc. warrants this product against defects in materials and workmanship for a period of three years from date of shipment. During the warranty period, Measurement Specialties will, at its option, either repair or replace products which prove to be defective. Exclusions This warranty does not apply to defects or damage resulting from: •Improper installation or maintenance •Customer supplied software or interfacing •Unauthorized modification or misuse •Operation outside of the product specifications Limitations The warranty set forth above is exclusive and no other warranty, whether written or oral, is expressed or implied. Measurement Specialties specifically disclaims the implied warranties of merchantability and fitness for a particular purpose. Some jurisdictions do not allow limitations on how long an implied warranty lasts, so the above limitation or exclusion may not apply to you. However, any implied warranty of merchantability or fitness is limited to the three-year duration of this written warranty. Warranty Service To obtain service during the warranty period, products must be returned, transportation prepaid, to Measurement Specialties. 34208A Rev. 8/18/13 How to Use the 34208A 2 ►Connect ► a +8.5 to +36 V DC power source to pin 8, ground to pin 9. 1.115 [28,30] 0.295 [7,50] 3 mm x 0,5 mm Thread 3,5 mm [0.138] Deep 0.295 [7,50] (6) Mounting Holes on 3 sides 0.945 [24,00] 0.354 [9,0] Dimensions in inches [mm], identical for each view where applicable. 0.945 0.354 [24,00] [9,0] Cable to 9-pin male D-Shell connector 3 1 2 Mounting Instructions ►Use ► two 3.0 mm x 0.5 mm thread machine screws to attach to one of the three 34208A mounting faces [recommended torque 5 lbf-in (0.56 N.m)]. DO NOT thread a screw more than 2.5 mm (0.100 inch or 5 turns) into any 34208A mounting face as this can damage the accelerometer and will VOID the warranty. ►A ► light film of oil or silicone grease can be used to enhance contact between two mounting surfaces. ►A ► locking compound should be used on all threads to prevent screws loosening due to vibrations. Accelerometer Connections Pin Description Cable Wire 1 2 3 4 5 6 7 8 9 Accelerometer 1 Signal common Accelerometer 2 +5 V Output Accelerometer 3 Temperature Self Test-L +Vs (Power) Ground* Brown Red Orange Yellow Green Blue Violet Grey White } } } } twisted pair twisted pair twisted pair twisted pair *connected to braided shield at D-shell pin CAUTION Improper wiring, particularly Power, may cause permanent damage and void the warranty. Pins other than +Vs should not exceed 5 V. ►Connect ► a differential or floating input A/D converter to each signal and signal common pins (pins 1 and 2 for Accelerometer 1, pins 3 and 2 for Accelerometer 2, pins 5 and 2 for Accelerometer 3 and pins 6 and 2 for Temperature). For best results, use a converter with an input impedance greater than 1 MΩ and common mode rejection ratio greater than 60 dB. Single-ended converters are not recommended but if used, leave pin 2 unconnected to eliminate ground loops. A positive acceleration (labeled on the accelerometer cover) causes a positive change on the corresponding output. ►Keep ► cable lengths between the accelerometer and A/D converter as short as practical. Use shielded twisted pair wiring, especially near electric motors or other noise sources. ►As ► a rule of thumb, sample frequency should be at least 10 times the signal bandwidth when linear interpolation is used for signal reconstruction. Built-in or external low-pass filtering can be used to lower the noise floor and eliminate spurious peak measurements from short-duration shock impulses with insignificant energy content. ►A ► logic 0 on the self-test input will add to accelerometer outputs (see calibration certificate for amount). An output that changes significantly more or less (±20%) than the certificate amount indicates a defective channel, shorted pin or broken wire. The self-test signal is approximate and should not be used for calibration. If the self-test feature will not be used, pin 7 may be left disconnected.