Hermetically Sealed Wide Bandwidth Profile 360° Cable Orientation Mach

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Hermetically Sealed Wide Bandwidth Profile 360° Cable Orientation Mach

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Model 7251A-10, -100
Hermetically Sealed Wide Bandwidth Profile 360° Cable Orientation Machine Tool Measurements, Shaker Tables, Flight Test Aerospace
ENDEVCO
MODEL 7251A-10 -100 -500
DESCRIPTION
ENDEVCO® Model 7251A small piezoelectric accelerometer with integral electronics, designed specifically measuring vibration most structures. unit hermetically sealed against environment contamination, offers high output sensitivity, wide bandwidth. This light weight (10.5 design effectively minimizes mass loading effects. Model 7251A features ENDEVCO's PIEZITE® Type crystal element, operating annular shear mode, which exhibits base strain sensitivity excellent output stability over time. This accelerometer incorporates internal hybrid signal conditioner two-wire system, which transmits impedance voltage output through same cable that supplies constant current power. Signal ground connected outer case unit and, when used with supplied isolated mounting screw, electrically isolated from ground. centrally located mounting bolt permits 360° cable orientation, very desirable feature many applications. model number suffix indicates sensitivity mV/g; i.e., 7251A-10 features output sensitivity mV/g. ENDEVCO Signal Conditioner Models 133, 2792B, 2793, 2775A OASIS 2000 Computer-Controlled System recommended with this accelerometer.
TYPICAL AMPLITUDE RESPONSE
TYPICAL TEMPERATURE RESPONSE
DEVIATION
-10, -100 -500
DEVIATION
100000
-500
-10, -100
1000
10000
(-51)
(-7)
(38)
(82)
(127)
FREQUENCY HERTZ
TEMPERATURE TEMPERATURE
APPLIES CALIFORNIA FACILITY
ENDEVCO
SPECIFICATIONS
following performance specifications conform ISA-RP-37.2 (1964) typical values, referenced +75°F (+24°C), unless otherwise noted. Calibration data, traceable National Institute Standards Technology (NIST), supplied.
MODEL 7251A-10 -100 -500
DYNAMIC CHARACTERISTICS RANGE VOLTAGE SENSITIVITY, ±10% FREQUENCY RESPONSE Resonance Frequency Amplitude Response ±1dB TRANSVERSE SENSITIVITY TEMPERATURE RESPONSE AMPLITUDE NONLINEARITY, F.S. OUTPUT CHARACTERISTICS OUTPUT POLARITY OUTPUT BIAS VOLTAGE OUTPUT IMPEDANCE FULL SCALE OUTPUT VOLTAGE RESOLUTION OVERLOAD RECOVERY GROUNDING POWER REQUIREMENT COMPLIANCE VOLTAGE SUPPLY CURRENT WARM-UP TIME ENVIRONMENTAL CHARACTERISTICS TEMPERATURE RANGE HUMIDITY SINUSOIDAL VIBRATION LIMIT SHOCK LIMIT BASE STRAIN SENSITIVITY THERMAL TRANSIENT SENSITIVITY ELECTROMAGNETIC SENSITIVITY PHYSICAL CHARACTERISTICS DIMENSIONS WEIGHT CASE MATERIAL CONNECTOR MOUNTING TORQUE CALIBRATION SUPPLIED: VOLTAGE SENSITIVITY MAXIMUM TRANSVERSE SENSITIVITY FREQUENCY RESPONSE ACCESSORIES 10207 EHM49 Model 3061-120
Units mV/g
±500
-100
-500
Typical Curve
equiv.
Acceleration directed into base produces positive output +11.3 +12.7 0.001 0.00025 0.00015 Signal ground connected case Isolated from mounting surface
equiv. pk/µ strain equiv. pk/°F (/°C) equiv. rms/gauss
-67°F +257°F (-55°C +125°C) Hermetically sealed 5000 0.04 0.02 (0.036) 0.00004
(oz)
lbf-in (Nm)
Outline Drawing 10.5 (0.37) Stainless Steel 10-32 receptacle, side mounted, mates with Endevco 3000 series cable (1.1)
mV/g
ISOLATED MOUNTING SCREW ASSY, 6-32 ALLEN WRENCH, 7/64 CABLE ASSEMBLY
ISOTRON (each channel)
Constant Current Source
Voltage Supply
OPTIONAL ACCESSORIES Model 2987 ADHESIVE MOUNTING ADAPTOR Model 2950M3 TRIAXIAL MOUNTING BLOCK EH303 NON-ISOLATED MTG. SCREW, 6-32 27580 NON-ISOLATED MTG. WASHERS, NOTES sensitivity special order. available special order. Short duration shock pulses, such those generated metal-tometal impacts, excite transducer resonance cause linearity errors. Send TP290 more details. Maintain high levels precision accuracy using Endevco's factory calibration services. Call Endevco's inside sales force 800-982-6732 recommended intervals, pricing turn-around time these services well quotations standard products.
Biased Output
Decoupling Capacitor
Unbiased Output
Model 3-Channel Signal Conditioner
Continued product improvement necessitates that Endevco reserve right modify these specifications without notice. Endevco maintains program constant surveillance over products ensure high level reliability. This program includes attention reliability factors during product design, support stringent Quality Control requirements, compulsory corrective action procedures. These measures, together with conservative specifications have made name Endevco synonymous with reliability. ENDEVCO CORPORATION, 30700 RANCHO VIEJO ROAD, JUAN CAPISTRANO, 92675 (800) 982-6732 (949) 493-8181 (949) 661-7231 www.endevco.com Email:applications@endevco.com 1001

Hermetically Sealed Wide Bandwidth Profile 360° Cable Orientation Mach

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