15208A 25208A Uniaxial Specifications* 35208A Biaxial Triaxial Digital Accelerometer User Configurable ±250 g, ±500 g Wide Bandwidth to 10 kHz 8A Measurement Specialties, Inc. 2236 N. Cleveland-Massillon Rd. Akron, Ohio 44333-1255 USA (330) 659-3312 www.meas-spec.com precisionsensors.meas-spec.com Parameter Min Typical Max Units Accelerometer Full Scale Range Option R250 ±250 g Option R500 ±500 g Sensitivity Drift 25°C to Tmin or Tmax 1% (TBD) % Zero g Drift 25°C to Tmin or Tmax ±1.5 g Alignment ±3.0 degrees Transverse Sensitivity 0.25 % Nonlinearity 0.2 2 % FSR Frequency Response 0 10† kHz Noise Density 2.8 mg/√Hz Temperature Sensor Range -55 125 °C Resolution 0.25 °C Accuracy ±2 ±3 °C Digital Signal Processor Sensor Scan Rate 42,500 Hz Analog Outputs Voltage Swing 0.25 4.75 V Impedance to Analog 100 130 220 Ω Nonlinearity 0.15 % FSR Digital Output Word Size 16 bits Power Supply (Vs) Input Voltage Limits -80 +80 V Input Voltage - Operating +8.5 +36 V Input Current 50 mA Rejection Ratio >120 dB Temperature Range (Ta) -40 +85 °C Mass 78 grams Shock Survival ±1500 ±1500 g Data subject to change without notice *within one year of calibration † User configurable low-pass filter 3dB cutoff (number poles configurable) 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. 15208A/25208A/35208A Rev. 8/19/13 Connection to a PC using MEAS Adapters Mounting Instructions Terminal Block Male D-Shell Connector Accelerometer Connections Pin Description Cable Wire 1 2 3 4 5 6 7 8 9 Analog Output 1+ Analog Output 2+ Analog Output 3+ Signal - RS485- RS485+ Aux +Vs (Power) Ground Brown Red Orange Yellow Green Blue Violet Grey White* *connected to braided shield at D-shell pin CAUTION } } } } ►Use ► two 3.0 mm x 0.5 mm thread machine screws to attach to the bottom or rear 15208A/25208A/35208A mount faces [recommended torque 5 lbf-in (0.56 N.m)]. Be careful not to bottom screws in tapped holes as this can strip threads. ►A ► locking compound should be used on all threads to prevent screws loosening due to vibrations. twisted pair 0.167 0.354 [4,25] [9,00] twisted pair Improper wiring, particularly Power, may cause permanent damage and void the warranty. Pins other than +Vs should not exceed 5 V. Power Supply ►A ► light film of oil or silicone grease can be used to enhance contact between mounting surfaces. twisted pair twisted pair Connect 15208A/25208A/35208A to the 35250A, and connect a PC COM port to the other side of the 35250A using the cable provided. Plug power supply into wall and plug into power jack on side of 35250A. Accelerometer should then be ready for use. 0.494 [12,55] 0.354 [9,00] 0.354 [9,00] 0.354 [9,00] 0.354 [9,00] 0.354 [9,00] 0.354 [9,00] 0.575 [14,60] X 1 1.437 3 [36,50] 3 mm x 0,5 mm Thread 0.138 [3,50] Deep 16 Places on 2 Views 0.240 [6,10] 3 1 2 2 0.689 [17,50] 2.049 [52,05] Rear View Bottom View 0.187 [4,76] Spring and cable added with cable options Dimensions in inches [mm] 120VAC 1.3mm Plug/Jack 15208A 25208A 35208A Accelerometer 9-Pin D-Subs 35250A Adapter Optional Analog Monitoring Port COM Port Cable 9-Pin 9-Pin D-Subs D-Subs PC How to Use the 15208A / 25208A / 35208A as an Analog Sensor ►If ► a Spectrum Sensors & Controls 35250A PC Interface Adapter is available, connect its sensor connector to the 15208A/25208A/35208A, apply power to the 35250A, and connect a computer to the 35250A RS232 connector. A positive acceleration (labeled on the accelerometer cover) causes a change on the corresponding output. ►If ► a 35250A is not available, connect a +8.5 to 36 V DC power source to +Vs. Connect power source ground to the Gnd pin. Connect a computer RS485 interface to the two RS485 pins on the 15208A/25208A/35208A. ►Optionally, ► connect a voltmeter or other instrument to each 15208A/25208A/35208A Analog Output and Signal-. For best results, use a converter with an input impedance greater than 1 MΩ. ►Keep ► cable lengths between an analog output and an instrument as short as practical. Use shielded twisted pair wiring, especially near electric motors or other noise sources. ►Download ► Instrument Configuration Utility (ICU) software from precisionsensors.meas-spec.com and use it to configure the 15208A/25208A/35208A. When transmitting High Speed Data to a PC, sample frequency should be at least 10 times the filter bandwidth when linear interpolation is used for signal reconstruction. Built-in low-pass filtering can be used to lower the noise floor and eliminate spurious peak measurements from shortduration shock impulses with insignificant energy content. Digital Wiring Example ►Accelerometer ► ranges (Range Hi and Range Lo) ►Low-pass ► filter settings (Filter 3 dB Cutoff) ►Resolution ► of high-speed data (IRIG Word Bits). Eight (8) bit data can be set to increase data transfer rates. ►Temperature ► and accelerometer Channel Units. Each channel can be configured to measure in units suitable for your application. ►Inversion ► of the sensor channels (Invert). Each channel output can be inverted for maximum flexibility in your measurements. ►The ► telemetry Bit Rate may be adjusted according to how fast measurements need to take place. RS232 hardware limits bit rate to 115kb. Retrieving the Calibration Certificate 1.Connect to the unit with ICU. 2.At the bottom of the Configure window, click Reports. 3.A separate window opens with Report selections at the bottom. Select the Calibration check box. The certificate will then be displayed. PWR GND 8.5 - 36VDC SELF TEST (OPTIONAL) RS485 HI RS485 LO 9 GRY 8 VIO 7 BLU 6 GRN 5 GND 34100A +VS AUX RS485+ RS485- SYSTEM 8.5 - 36VDC POWER PWR GND AND SELF TEST CONTROL (OPTIONAL) 8 34100A 1+ +VS 9 PWR GND 7 AUX 1 2+ 2 3+ 3 SIG 4 GND CH1+ CH1CH2+ CH2CH3+ CH3- ►First, ► uninstall any previous versions of ICU that may be installed, then download Instrument Configuration Utility (ICU) software from precisionsensors.meas-spec.com. Run Setup_ICU.exe to install ICU. ►Start ► ICU. Use About/Setup to select your COM Port and confirm the data directory. Select Configuration as the Program Function and press OK. ►Press ► the Configuration button. ICU scans for any instruments attached to the COM Port. If an instrument is found, ICU connects and reads the instrument configuration. ►The ► 15208A/25208A/35208A comes ready from the factory. If your application requires changes, use the Main tab to change the telemetry and the channel tabs to edit each channel. For each channel, check the Range Hi and Range Lo and the Filter 3dB Cutoff. If changes are made, you must press the Write Values to Instrument button. The password as shipped from the factory is “si”. ►Use ► the High Speed Acquire button to collect and save data to disk. Items Provided in 35250AK0 PC Interface Kit -35250A PC Interface Adapter -9 Pin D-sub Female-to-Female Cable -9 Volt DC Power Supply Notes: Analog Wiring Example Typical Direct Wiring WHT Installing and Using ICU Typical Settings Changed with ICU MEASURING EQUIPMENT w/DIFFERENTIAL INPUTS