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Piezoresistive Accelerometer
Model 2262CA
Rugged, Fluid Damped DC Response 25 to 2000 g Full Scale Six Wire System For Shunt Calibration * Hermetically Sealed
Actual size
ENDEVCO
MODEL 2262CA
* * * *
DESCRIPTION
The ENDEVCO(R) Model 2262CA accelerometers are rugged, fluid damped transducers of the piezoresistive type. ENDEVCO's PIEZITE(R) Type P-11 semiconductor strain gage elements are used in a bridge configuration providing a low impedance output with 10 Vdc excitation. The output is high enough to drive most tape recorders data aquisition systems, and low frequency galvanometers directly, without amplification. The Model 2262CA has two active arms and two precision fixed resistors of 900 each to provide for shunt calibration in a six-wire system. It is provided with a six-conductor shielded cable assembly. These models feature a wide frequency range. Positive overtravel stops (2262CA-25, -100, and -200) prevent damage to the seismic system, giving an overrange capability of 2000 g. The use of viscous damping extends their useful frequency range and reduces the effect of spurious, high frequency vibrations. ENDEVCO Model 136 Three-Channel System, Model 4430A or OASIS 2000 ComputerControlled System are recommended as signal conditioner and power supply.
.625 HEX (15.88) .22 (5.6) 3 4 5 6 2 1
.17 (4.3)
CENTER OF SEISMIC MASS
NOTE: IF ALTERNATE STUD IS USED, THE LENGTH OF STUD FROM MOUNTING SURFACE MUST BE .155/ .135 (3.94/3.43).
.610 DIA (15.49) DIRECTION OF POSITIVE OUTPUT
CENTER OF SEISMIC MASS .140 (3.56)
.58 (14.7) 1.00 (25.4)
.130 MIN THD (3.30)
.280 (7.11)
.006 (.15) .003 (.08)
.028 (.71) .250 DIA (6.35) .540 DIA (13.72) RECEPTACLE 11 55 66 22 44 33 SCHEMATIC MODEL 3023B CABLE ASSEMBLY RED + IN WHT/RED CAL WHT/GRN CAL GRN + OUT BLK - IN WHT - OUT CABLE SHIELD
10-32 UNF-2B THD
ACCELEROMETER CASE
STANDARD TOLERANCE INCHES (MILLIMETERS) .XX = +/- .03 (.X = +/- .8) .XXX = +/- .010 (.XX = +/- .25)
SPECIFICATIONS
PERFORMANCE CHARACTERISTICS: All values are typical at +75F (+24C), 100 Hz and 10 Vdc excitation unless otherwise stated. Calibration data, traceable to the National Institute of Standards and Technology (NIST), is supplied. Units g pk mV/g Typ (Min) Hz Hz % Max % (Min) Hz Typ (Min) 2262CA-25 25 10 (8) 0 to 650 0 to 800 -100 100 2.5 (2.0) 0 to 1300 0 to 1600 +5 (-12) 5000 (4000) 0.707 2 -200 200 1.25 (1.0) 0 to 1800 0 to 2000 +5 (-7) 7000 (5600) 0.707 2 -1000 1000 0.25 (0.19) 0 to 1500 0 to 1800 +5 (-8) 8000 (6400) 0.707 2 -2000 2000 0.13 (0.09) 0 to 3000 0 to 3600 +5 (-7) 10 000 (8000) 0.707 2
RANGE SENSITIVITY (at 100 Hz) AMPLITUDE RESPONSE 5% 1dB Maximum Deviation (0 Hz to 2000 Hz) [1] MOUNTED RESONANCE FREQUENCY DAMPING RATIO [2] NON-LINEARITY AND HYSTERESIS (% of reading, to full range)
2500 (2000) 0.707 1
% Max
APPLIES TO CALIFORNIA FACILITY
ENDEVCO
Piezoresistive Accelerometer
SPECIFICATIONS--continued
PERFORMANCE CHARACTERISTICS--continued
MODEL 2262CA
TRANSVERSE SENSITIVITY ZERO MEASURAND OUTPUT [3] THERMAL ZERO SHIFT From 0F to 200F (-18C to +93C) THERMAL SENSITIVITY SHIFT At 0F and 150F (-18C and +66C) WARM-UP TIME ELECTRICAL EXCITATION [4] [5] INPUT RESISTANCE [4] [6] OUTPUT RESISTANCE [4] [6] FIXED RESISTORS INSULATION RESISTANCE PHYSICAL CASE, MATERIAL ELECTRICAL, CONNECTIONS IDENTIFICATION MOUNTING/TORQUE WEIGHT ENVIRONMENTAL ACCELERATION LIMITS (in any direction) Static Sinusoidal Vibration Shock (half-sine pulse) BASE STRAIN SENSITIVITY (at 250 microstrain) TEMPERATURE Operating Storage HUMIDITY ALTITUDE CALIBRATION DATA SUPPLIED SENSITIVITY (at 100 Hz and 10 g pk) FREQUENCY RESPONSE ZERO MEASURAND OUTPUT MAXIMUM TRANSVERSE SENSITIVITY MOUNTED RESONANCE FREQUENCY INPUT AND OUTPUT RESISTANCE ACCESSORIES 2981-3 3023B-30
Units % Max mV Max mV Max % Typ Minutes Max
2262CA-25 3 25 20 -5 2
-100 3 25 20 -5 2
-200 3 25 20 -5 2
-1000 3 25 20 -5 2
-2000 3 25 20 -5 2
10.0 Vdc, 15 Vdc maximum 900 ohms 900 ohms 900 ohms 1% 100 megohms minimum at 100 Vdc; all leads to case
Stainless Steel (416 CRES) ENDEVCO Model 3023B-30 (supplied) Manufacturer's logo, model number and serial number Hole for 10-32 UNF x 1/8 inch mounting stud/18 lbf-in (2 Nm) 28 grams (cable weighs 18 grams/meter)
g g pk g Equiv. g
250 250 1000 0.005
1000 1000 2000 0.005
1000 1000 2000 0.005
1000 1000 2500 0.05
2000 2000 5000 0.05
0F to 200F (-18C to +93C) -20F to +220F (-29C to +104C) Unaffected. Unit is hermetically sealed Unaffected
mV/g 20 to 2000 Hz for 2262CA-25, to 4000 Hz for -100, to 6000 Hz for -200, to 5000 Hz for -1000 and -2000; % deviation reference 100 Hz mV % of sensitivity Hz Ohms be carefully considered when operating at low temperature extremes, especially when exciting more than one transducer from a single power supply. 5. Other excitation voltages may be used to 15.0 Vdc. Specify at time of order to obtain a more accurate calibration. 6. Measured at approximately 1 Vdc. Bridge resistance increases with applied voltage due to heat dissipation in the strain gage elements. 7. Maintain high levels of precision and accuracy using Endevco's factory calibration services. Call Endevco's inside sales force at 800-982-6732 for recommended intervals, pricing and turnaround time for these services as well as for quotations on our standard products. NOTE: Tighter specifications available on special order.
MOUNTING STUD (10-32 UNF-2A) CABLE ASSEMBLY
OPTIONAL ACCESSORIES 2950 TRIAXIAL MOUNTING BLOCK 2981-4 MOUNTING STUD (M5-0.8) 3023B-XX CABLE ASSEMBLY (XX IDENTIFIES CABLE LENGTH IN INCHES) NOTES 1. The sensitivity increase at the mounted resonant frequency is less than 10%, reference 100 Hz. 2. Damping ratio is 2.2/0.2, typical, at 0F/200F (-18/+93C). 3. Zero Measurand Output (ZMO) is the transducer output with 0 acceleration applied. 4. Rated excitation is 10.0 Vdc. The strain gage elements have a positive temperature coefficient of resistance of approximately 0.5% per F. Power supply current capability (regulation) should
Continued product improvement necessitates that Endevco reserve the right to modify these specifications without notice. Endevco maintains a program of constant surveillance over all products to ensure a high level of reliability. This program includes attention to reliability factors during product design, the support of stringent Quality Control requirements, and compulsory corrective action procedures. These measures, together with conservative specifications have made the name Endevco synonymous with reliability. ENDEVCO CORPORATION, 30700 RANCHO VIEJO ROAD, SAN JUAN CAPISTRANO, CA 92675 USA (800) 982-6732 (949) 493-8181 fax (949) 661-7231 www.endevco.com Email:applications@endevco.com 1100

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