ENDEVCO
MODEL
7596A
Variable Capacitance Accelerometer
SPECIFICATIONS—continued
PERFORMANCE CHARACTERISTICS—continued
Units
THERMAL ZERO SHIFT
From 32°F to 122°F (0°C to 50°C)
% FSO Max
From -13°F to +167°F (-25°C to +75°C)
% FSO Max
From -65°F to +250°F (-54°C to +121°C)
% FSO Max
THERMAL SENSITIVITY SHIFT
From 32°F to 122°F (0°C to +50°C)
% Max
From -13°F to +167°F (-25°C to +75°C)
% Max
From -65°F to +250°F (-54°C to +121°C)
% Max
THERMAL TRANSIENT ERROR
Equiv. g/°F
PER ISA RP 37.2
Equiv. g/°C
OVERRANGE (Determined by Electrical clipping or Mechanical stops, whichever is smaller.)
Electrical clipping
g
Mechanical stops, typical
g
Recovery Time
μs
THRESHOLD (RESOLUTION) [5]
Equiv. g’s
BASE STRAIN SENSITIVITY, MAX [6]
Equiv. g’s
MAGNETIC SUSCEPTIBILITY [7]
Equiv. g’s
WARM-UP TIME (to within 1%)
ms
ACCESSORIES (included)
EHW265 (2) SIZE 4, FLAT WASHERS
EH409
(2) 4-40 X 3/8 INCH CAP SCREWS
EHM464
(1) HEX WRENCH
OPTIONAL ACCESSORIES
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.
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
6. Per ISA 37.2 at 250 Microstrain.
7. At 100 Gauss, 60 Hz.
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.
7596-2
-10
-30
-50
-100
±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
±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
-3.5/+3.8
±4
< 10
0.0005
0.01
< 1
10
-18/+19
±30
< 10
0.0025
0.01
< 1
10
-53/+57
±90
< 10
0.008
0.01
< 1
10
-87/+95
±200
< 10
0.0012
0.01
< 1
10
-175/+190
±200
< 10
0.025
0.01
< 0.1
10
ELECTRICAL
EXCITATION [2]
8.5 to 30 Vdc, 32 Vdc maximum without damage; excitation voltage can be applied to any
lead without damage
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 M
CURRENT DRAIN [8]
OUTPUT IMPEDANCE/LOAD
RESIDUAL NOISE
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)
10 grams (cable weighs 9 grams/meter)
MOUNTING/TORQUE
WEIGHT
ENVIRONMENTAL
ACCELERATION LIMITS (in any direction)
Static
Sinusoidal/Random Vibration
Shock (half-sine pulse)
Zero Shift
TEMPERATURE
Operating
Storage
HUMIDITY/ALTITUDE
ESD SENSITIVITY
20 000 g
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
-65°F to +250°F (-55°C to +121°C)
-100°F to +300°F (-73°C to +150°C)
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)
FREQUENCY RESPONSE
ZERO MEASURAND OUTPUT
MAXIMUM TRANSVERSE SENSITIVITY
mV/g with 15 Vdc excitation
1 to 100 Hz for 7596A-2, 20 to 10000 Hz for all other ranges
mV
% of sensitivity
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