Atec Endevco-25B - Manual (Page 2)

ACCESSORIES
Model 3006-120 (10 ft)
CABLE ASSEMBLY [4]
P/N 31836 REMOVAL TOOL
OPTIONAL ACCESSORIES
Model 2950M16
TRIAXIAL MOUNTING BLOCK
P/N 31849 ADHESIVE MOUNTING KIT
P/N EJ21 10-32 TO BNC ADAPTOR
NOTES
1. Excessive current supply may cause permanent damage to
accelerometer.
2. Short duration shock pulses, such as those generated by
metal-to-metal impacts, may excite transducer resonance and
cause linearity errors. Send for TP290 for more details.
3. Adhesives such as petro-wax, hot-melt glue, and cyanoacry-
late epoxy (super glue) may be used to mount the accelerom-
eter temporarily to the test structure. An adhesive mounting
kit (P/N 31849) is available as an option from Endevco. To
remove an epoxy-mounted accelerometer, first soften the
epoxy with an appropriate solvent and then twist the unit off
with the supplied removal wrench. Damage to sensors
ENDEVCO
MODEL
25B
ISOTRON ® Accelerometer
SPECIFICATIONS
The following performance specifications conform to ISA-RP-37.2 (1964) and are typical values, referenced at +75°F (+24°C), 4 mA, and
100 Hz, unless otherwise noted. Calibration data, traceable to National Institute of Standards and Technology (NIST), is supplied.
DYNAMIC CHARACTERISTICS Units
RANGE g ±1000
VOLTAGE SENSITIVITY
Typical mV/g 5
Minimum mV/g 4
FREQUENCY RESPONSE See Typical Amplitude Response
RESONANCE FREQUENCY kHz 50
AMPLITUDE RESPONSE [2]
±5% Hz 2 to 8000
±1dB Hz 1 to 12 000
TEMPERATURE RESPONSE See Typical Curve
TRANSVERSE SENSITIVITY % ≤ 5
AMPLITUDE LINEARITY % < 2 to F. S.
OUTPUT CHARACTERISTICS
OUTPUT POLARITY
Acceleration directed into the base of the unit
produces positive output
DC OUTPUT BIAS VOLTAGE Vdc +8.5 to +11.5
OUTPUT IMPEDANCE Ω ≤ 600
FULL SCALE OUTPUT VOLTAGE V ±5.0
RESIDUAL NOISE equiv. g rms ≤ 0.007
GROUNDING Signal ground isolated from mounting surface.
POWER REQUIREMENT
SUPPLY CURRENT [1]
mA +3.5 to +4.5
VOLTAGE Vdc +18 to +24
WARM-UP TIME sec < 3
ENVIRONMENTAL CHARACTERISTICS
TEMPERATURE RANGE
-67°F to +257°F (-55°C to +125°C)
HUMIDITY Epoxy sealed, non-hermetic
SINUSOIDAL VIBRATION LIMIT g pk 500
SHOCK LIMIT g pk 2000
BASE STRAIN SENSITIVITY equiv. g pk/µ strain 0.002
ELECTROMAGNETIC SENSITIVITY equiv. g rms/gauss 0.09
PHYSICAL CHARACTERISTICS
DIMENSIONS
See Outline Drawing
WEIGHT gm (oz) 0.2 (.01)
CASE MATERIAL Aluminum Alloy, Hard Anodized
MOUNTING [3] Adhesive
CALIBRATION
SUPPLIED:
SENSITIVITY
mV/g
TRANSVERSE SENSITIVITY %
FREQUENCY RESPONSE % 20 Hz to 12 kHz
caused by inappropriate removal procedures are not covered
by Endevco’s warranty.
4. Follow the Instruction Manual carefully when replacing the
cable assembly in the field.
5. 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, pric-
ing and turn-around time for these services as well as for quo-
tations on our standard products.
Constant
Current
Source
+ Voltage Supply
Decoupling
Capacitor Unbiased
Output
ISOTRON
(each channel)
Biased
Output
Continued product improvement necessitates that Endevco reserve the right to modify these specifications without notice. Endevco maintains a program of con-
stant 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:[email protected]
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