7290A Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – Variable Capacitance Accelerometer

Variable Capacitance Accelerometer
Model 7290A
• DC Response
• 2 to 100 g Full Scale
• Motion, Low Frequency, Tilt
• Gas Damping
• 10Kg Shock Survivability
DESCRIPTION
The ENDEVCO^® Model 7290A MICROTRON^®
accelerometer family utilizes unique variable capaci-
tance microsensors. The accelerometers are designed
for measurement of relatively low level accelerations
in aerospace and automotive environments. Typical
applications require measurement of whole body
motion immediately after the accelerometer is sub-
jected to a shock motion, and in the presence of
severe vibrational inputs.
Gas damping and internal overrange stops enable the
anisotropically-etched silicon microsensors to with-
stand high shock and acceleration loads.
The Model 7290A can operate from 9.5 V to 18.0 V
and provide a high level, low impedance output. The
±2 volt differential output is dc coupled at a dc bias
of approximately 3.6 V. Frequency response is con-
trolled by the near-critically damped sensors. The use
of gas damping results in very small thermally-
induced changes of frequency response.
ENDEVCO Model 136 Three-Channel System,
Model 4430A or OASIS 2000 Computer-Controlled
System are recommended as signal conditioner and
power supply.
U.S. Patents 4,574,327, 4,609,968 and 4,999,735
Actual size
ENDEVCO
MODEL
7290A
SPECIFICATIONS
PERFORMANCE CHARACTERISTICS: All values are typical at +75°F (+24°C), 100 Hz and 15 Vdc excitation unless otherwise stated. Calibration data, traceable
to the National Institute of Standards, (NIST), is supplied.
RANGE [1]
SENSITIVITY (at 100 Hz) [2] [3]
AMPLITUDE RESPONSE [4]
± 5%
MOUNTED RESONANCE FREQUENCY
NON-LINEARITY AND HYSTERESIS [5]
TRANSVERSE SENSITIVITY [6]
ZERO MEASURAND OUTPUT [3]
DAMPING RATIO
DAMPING RATIO CHANGE
From -65°F to +250°F ( -55°C to +121°C)
Units
g pk
mV/g
Hz
Hz
% FSO Typ
% FSO (Max)
% Max
mV Max
%/°F
%/°C
7290A-2
±2
1000 ±20
0 to 15
1300
±0.20
±0.50
2
±50
4.5
+0.04
+0.08
-10
±10
200 ±10
0 to 500
3000
±0.20
±0.50
2
±50
0.7
+0.04
+0.08
-30
±30
66 ±4
0 to 800
5500
±0.20
±0.50
2
±50
0.7
+0.04
+0.08
-50
±50
40 ±2
0 to 1000
5500
±0.20
±0.50
2
±50
0.6
+0.04
+0.08
-100
±100
20 ±1
0 to 1000
6000
±1
±2
2
±50
0.6
+0.04
+0.08
APPLIES TO CALIFORNIA FACILITY