7596A [ETC]
Variable Capacitance Accelerometer; 可变电容加速度计
| 型号： | 7596A |
| 厂家： | 
ETC |
| 描述： | Variable Capacitance Accelerometer |
| 文件： | 总2页 (文件大小：478K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ENDEVCO
MODEL
7596A
Variable Capacitance Accelerometer
Model 7596A
• Economical and Rugged
• 2 to 100 g Full Scale
• DC Response
• Gas Damped Sensor
• Mechanical Over-range Stops
DESCRIPTION
Actual size
The ENDEVCO Model 7596A VALULINE
accelerometer family is a low cost solution to low-level,
low frequency measurements. Applications include labora-
tory measurements, ground transportation studies and mea-
surements where the accelerometer will be subjected to
high shock levels (up to 10 000 gs, see specifications).
The 7596A is ideal for modal studies on large structures.
Gas damping and internal overange stops enable the
anisotropically etched silicon microsensors to withstand
high shocks and acceleration loads. The use of gas damp-
ing, in the sensor, results in very small-induced changes of
frequency response. The patented sensor design ensures
immediate stability making the unit ready to take accurate
DC or dynamic data within one millisecond!
The 7596A can operate from 8.5Vdc to 30Vdc and pro-
vide a high level, low impedance output. The output is
high enough to drive most laboratory instruments, tape
recorders and data acquisition systems without amplifica-
tion or signal conditioning. The output can be fed into
either a differential or single-ended amplifier or standard
bridge electronics with 10Vdc excitation.
ENDEVCO Model 136 Three-Channel System, Model
4430A or OASIS Computer-Controlled System are
recommended signal conditioners.
SPECIFICATIONS
PERFORMANCE CHARACTERISTICS: All values are typical at +75°F (+24°C) and 15 Vdc excitation unless otherwise stated. Calibration data, traceable to
the National Institute of Standards, (NIST), is supplied.
Units
g pk
mV/g
Hz
7596-2
±2
-10
±10
-30
±30
-50
±50
-100
±100
20 ±2
0 to 1000
6000
±1
±2
1
±200
0.6
RANGE
SENSITIVITY (at 100 Hz) [1] [2]
FREQUENCY RESPONSE (± 5%)
MOUNTED RESONANCE FREQUENCY
NON-LINEARITY AND HYSTERESIS [3]
1000 ±100
0 to 15
1300
±0.20
±0.50
1
200 ±20
0 to 500
3000
±0.20
±0.50
1
66 ±8
0 to 800
5500
±0.20
±0.50
1
40 ±4
0 to 1000
5500
±0.2
±0.5
1
Hz
% FSO Typ
% FSO (Max)
% Typ
mV Max
TRANSVERSE SENSITIVITY [4]
ZERO MEASURAND OUTPUT [2]
DAMPING RATIO
±200
3.0
±200
0.7
±200
0.7
±200
0.6
DAMPING RATIO CHANGE
From -65°F to +250°F ( -55°C to +121°C)
%/°F
%/°C
+0.04
+0.08
+0.04
+0.08
+0.04
+0.08
+0.04
+0.08
+0.04
+0.08
APPLIES TO CALIFORNIA FACILITY
ENDEVCO
MODEL
7596A
Variable Capacitance Accelerometer
SPECIFICATIONS—continued
PERFORMANCE CHARACTERISTICS—continued
Units
7596-2
-10
-30
-50
-100
THERMAL ZERO SHIFT
From 32°F to 122°F (0°C to 50°C)
From -13°F to +167°F (-25°C to +75°C)
From -65°F to +250°F (-54°C to +121°C)
THERMAL SENSITIVITY SHIFT
From 32°F to 122°F (0°C to +50°C)
From -13°F to +167°F (-25°C to +75°C)
From -65°F to +250°F (-54°C to +121°C)
THERMAL TRANSIENT ERROR
PER ISA RP 37.2
% FSO Max
% FSO Max
% FSO Max
±2.0
±4.0
±6.0
±2.0
±4.0
±6.0
±2.0
±4.0
±6.0
±2.0
±4.0
±6.0
±2.0
± 4.0
± 6.0
% Max
% Max
% Max
Equiv. g/°F
Equiv. g/°C
±2.0
±4.0
±6.0
< 0.0006
< 0.001
±2.0
±4.0
±6.0
< 0.0006
< 0.001
±2.0
±4.0
±6.0
< 0.0006
< 0.001
±2.0
±4.0
±6.0
< 0.0006
<0.001
±2.0
±6.0
± 6.0
< 0.0006
< 0.001
OVERRANGE (Determined by Electrical clipping or Mechanical stops, whichever is smaller.)
Electrical clipping
Mechanical stops, typical
Recovery Time
THRESHOLD (RESOLUTION) [5]
BASE STRAIN SENSITIVITY, MAX [6]
MAGNETIC SUSCEPTIBILITY [7]
WARM-UP TIME (to within 1%)
g
g
µs
Equiv. g’s
Equiv. g’s
Equiv. g’s
ms
-3.5/+3.8
±4
< 10
0.0005
0.01
< 1
-18/+19
±30
< 10
0.0025
0.01
< 1
-53/+57
±90
< 10
0.008
0.01
< 1
-87/+95
±200
< 10
0.0012
0.01
-175/+190
±200
< 10
0.025
0.01
< 1
10
< 0.1
10
10
10
10
ELECTRICAL
EXCITATION [2]
8.5 to 30 Vdc, 32 Vdc maximum without damage; excitation voltage can be applied to any
lead without damage
CURRENT DRAIN [8]
OUTPUT IMPEDANCE/LOAD
RESIDUAL NOISE
4.5 mA Typ, 8 mA Max
50 ohms max/10K ohms resistance minimum, 0.1 µF capacitance maximum
100 µV rms typ, 0.5 to 100 Hz. 500 µV rms typ, 0.5 Hz to 10 KHz
100 MΩ
ISOLATION
PHYSICAL
CASE, MATERIAL/BASE
ELECTRICAL, CONNECTIONS
Anodized Aluminum Alloy
28 AWG silver plated alloy 135, PFA340 Teflon® insulated conductors, spiral shield (SPC), HyperFLEX
jacket with TFE non-fray, end grip 30 ± 3 inches (760 ± 76mm) long.
Two 4-40 x 3/8 6 lbf-in (0.7 Nm)
MOUNTING/TORQUE
WEIGHT
10 grams (cable weighs 9 grams/meter)
ENVIRONMENTAL
ACCELERATION LIMITS (in any direction)
Static
20 000 g
Sinusoidal/Random Vibration
Shock (half-sine pulse)
Zero Shift
100 g pk, 20 - 2000 Hz/40 g rms, 20 - 2000 Hz
5000 g, 150 µsec or longer for the -2 and -10; 10 000 g, 80 µsec or longer for the -30 and -100
0.1% FSO typical at 5000 g
TEMPERATURE
Operating
-65°F to +250°F (-55°C to +121°C)
Storage
-100°F to +300°F (-73°C to +150°C)
HUMIDITY/ALTITUDE
ESD SENSITIVITY
Unaffected. Unit is epoxy sealed. Hybrid and sensor are hermetically sealed/unaffected.
Unit meets Class 3 requirements of MIL-STD-883
CALIBRATION DATA SUPPLIED (noted on shipping box)
SENSITIVITY
(at 5 Hz and 1 g pk, for 2 g range)
(at 100 Hz and 10 g pk, all other ranges) mV/g with 15 Vdc excitation
FREQUENCY RESPONSE
1 to 100 Hz for 7596A-2, 20 to 10000 Hz for all other ranges
ZERO MEASURAND OUTPUT
MAXIMUM TRANSVERSE SENSITIVITY
mV
% of sensitivity
3. Full scale output (FSO) is nominally 4 volts.
4. 1% is typical. 1% maximum available on special order.
5. THRESHOLD = MAX. RESIDUAL NOISE; 0.5 TO 100 Hz
SENSITIVITY
ACCESSORIES (included)
EHW265
EH409
(2) SIZE 4, FLAT WASHERS
(2) 4-40 X 3/8 INCH CAP SCREWS
(1) HEX WRENCH
EHM464
6. Per ISA 37.2 at 250 Microstrain.
7. At 100 Gauss, 60 Hz.
OPTIONAL ACCESSORIES
8. Current drain increases slightly with increasing excitation; typi-
cal change is +.06 mA per volt from 8.5 to 30 Vdc.
9. 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.
24328
7990
4 CONDUCTOR SHIELDED CABLE
TRIAXIAL MOUNTING BLOCK
NOTES
1. Reference frequency is 20 Hz on the 2 g range.
2. Over the excitation range 8.5 to 30 Vdc. Sensitivity changes
+0.1%/V typical and zero measurand output changes -0.5
mV/V typical.
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:applications@endevco.com
0603 REV C
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