2024年8月3日发(作者：节峯)
Dynamic Transducers and Systems
21592 Marilla St. • Chatsworth, CA 91311 • Phone 818-700-7818
• e-mail: info@
Rev A ECN 5980 05/11/09
OPERATING GUIDE
MODEL 3293A MINIATURE TRIAXIAL LIVM ACCELEROMETER
WITH SINGLE 4-PIN CONNECTOR,
CASE GROUNDED
Model 3293A is a low-noise, high sensitivity, miniature LIVM
triaxial accelerometer featuring a single, transverse mounted, 4-
pin electrical connector. This feature allows the 3293A to be
used in situations where vertical space is limited. Model 3293A
is case grounded. The 3293A is a 500mV/g accelerometer.
This Guide contains:
1) Specifications, Model 3293A
2) Outline/Installation Drawing 127-3293A
3) Operating Instructions, Model 3293A
NOTE: LIVM™ is Dytran's trademark for its line of Low Impedance Voltage Mode sensors with built-in amplifiers
operating from constant current sources over two wires. LIVM instruments are compatible with other
manufacturers’ comparable systems labeled IEPE.
SPECIFICATIONS, MODEL 3293A TRIAXIAL ACCELEROMETER
SPECIFICATIONS UNITS
PHYSICAL
WEIGHT 8.8 grams
SIZE (WIDTH x HEIGHT x LENGTH) 0.55 x .37 x .89 inches
MOUNTING 5-40 UNF INTERNAL THD
CONNECTOR [1] 4-PIN
MATERIAL, HOUSING/CONNECTOR TITANIUM ALLOY
PERFORMANCE
SENSITIVITY, ±10% [2] 500
RANGE, F.S. (each axis) ±7
FREQUENCY RESPONSE, ±10% 0.25 to 4000
PHASE RESPONSE, ±5º 1 to 3000
ELEMENT NATURAL FREQUENCY >15
ELECTRICAL NOISE FLOOR .0002
LINEARITY, MAX [3] 1
TRANSVERSE SENSITIVITY, MAX 6
SIGNAL POLARITY POSITIVE FOR MOTION IN DIRECTION OF
ARROWS ON HOUSING
mV/g
g
Hz
Hz
kHz
grms
% FS
%
ENVIRONMENTAL
MAXIMUM VIBRATION
MAXIMUM SHOCK
TEMPERATURE RANGE
ENVIRONMENTAL SEAL
COEFFICIENT OF THERMAL SENSITIVITY
ELECTRICAL
SUPPLY CURRENT RANGE, (each axis) [4]
COMPLIANCE (SUPPLY) VOLTAGE RANGE (each axis)
OUTPUT IMPEDANCE, TYP.
OUTPUT BIAS VOLTAGE
DISCHARGE TIME CONSTANT, NOM.
GROUND ISOLATION
SUPPLIED ACCESORIES:
± 50
1000
-60 to +185
HERMETIC
.07
gpk
gpk
°F
%/°F
2 to 20
+18 to +30
150
+11 to +13
1.0 to 1.5
CASE GROUNDED
mA
VDC
Ohms
VDC
sec
MODEL 6580, MOUNTING STUD 5-40 TO 5-40
[1] Connector mates with Dytran cable assy. Model 6811AXX or 6824AXX. (xx = length in feet)
[2] Reference sensitivity measured at 100 Hz, 1 grms per ISA RP 37.2
[3] Linearity is % of specified full scale (or any lesser full scale range), zero-based best-fit straight line method.
[4] Power only with LIVM Dytran constant current type power unit. If power
is applied without current limiting protection, the internal amplifier will be immediately destroyed.
Rev A ECN 5980 05/11/09
2
OPERATING INSTRUCTIONS
MODEL 3293A TRIAXIAL ACCELEROMETER WITH TEDS
INTRODUCTION
Model 3293A is a miniature three-axis
accelerometer using the latest in ceramic shear
technology coupled with 2-wire internal LIVM
electronics.
This instrument contains three miniature
ceramic laminar shear mode accelerometer elements
mounted to a single support and welded into a titanium
housing. The three elements are mounted
orthogonally to each other so that they can measure
the complete motion of a point.
Model 3293A has an internal 5-40 thread for
stud mounting.
LIVM (Low Impedance Voltage Mode) design
means that three miniature IC amplifiers are built into
the instrument, one for each axis, to lower the
impedance of the ceramic seismic elements by many
orders of magnitude. This technique allows the driving
of long cables without affecting sensitivity and the use
of very simple constant current type power units.
DESCRIPTION
Refer to the outline/installation drawing 127-
3293A for the dimensions of Model 3293A.
This novel accelerometer features three
modular style ceramic elements mounted to a single
vertical post. Each planar shear mode element is
connected to a miniature IEPE amplifier. The element
assembly is mounted in a titanium housing.
The electrical connections from the elements
are brought out to the contacts of a four-pin connector
mounted transversely to a vertical face of the housing.
The three signal/power connections to the elements
are connected to three separate pins while the three
ground returns for the elements are tied together to
one common pin of the four-pin connector. The case
of this instrument is connected to electrical ground.
The performance specifications and criteria for
Model 3293A are delineated on the specification sheet
included with this operating guide.
Rev A ECN 5980 05/11/09
INSTALLATION
Select a smooth surface approx. .70 in
diameter and clean off all debris which would preclude
an intimate surface contact. Although the 3293A has
an internal thread for mounting, it may also be
adhesively mounted. Various adhesives may be use
to mount Model 3293A but the adhesives of choice for
ease of use are any of the cyanoacrylate “instant”
adhesives. They are tough and they set almost
instantly. They also do not need a thick bond line
which is good for high frequency response. The
selected (or prepared) mounting area should be flat to
within .001 in TIR for best high frequency response.
NOTE: Before mounting, be sure to clean the
mounting surface thoroughly to avoid inclusion
of machining chips and other debris between
mating surfaces. Intimate contact between
mating surfaces is important for best
performance.
Spread a light layer of adhesive on the
mounting surface and apply the 3293A to the
mounting area in the desired orientation and press and
hold firmly for several seconds.
If a fair amount of motion is expected during
the test, it is good practice to tie the cable down to a
stationary point as close as possible to the
accelerometer (but not closer than 1 inch) to avoid
potentially damaging cable whip. You are now ready to
connect the 3293A to the power unit.
OPERATION
The 3293A may be operated with standard
IEPE signal conditioners.
Be sure to check the orientation of each axis
with the markings on the instrument upper surface
and/or the outline/installation drawing supplied with the
Operating Guide. The polarity of each axis is also
define with arrows marked on the side surface of the
3293A and again, on the outline/installation drawing
127-3293A. The arrows indicate the direction and
sense of motion of the accelerometer that will produce
positive-going output signals. The vertical axis, axis Z,
produces positive-going output voltage when the
accelerometer is accelerated upward, i.e., away from
the mounting surface.
3
REMOVAL (OR UNINSTALLATION)
It is very important when removing this
instrument to remember that, although it is built to be
very rugged, it is a sensitive measuring instrument and
as such should be treated gently when being removed
from its installation. Never strike the unit to break it
free from its mounting surface. Simply grip two
opposing flats with an adjustable or open-end wrench
and gently twist the instrument until the mounting
interface (stud or adhesive) is broken. This method
avoids any trauma to the instrument and will help
ensure a long life for the accelerometer.
MAINTENANCE AND REPAIR
This instrument is not field repairable. No
maintenance is required, or possible. If a problem
occurs, contact the factory for help. You will be
assigned a Returned Material Authorization (RMA)
number should the instrument have to be returned to
the factory for evaluation. A short note describing the
problem will facilitate the repair procedure.
There is no charge for evaluation of the
instrument and we will perform no repair work until you
are notified of any charges.
It is good practice to return the instrument to
the factory for recalibration from time to time with
frequency of recalibration dependent on usage
intensity and frequency.
Rev A ECN 5980 05/11/09
4
2024年8月3日发(作者：节峯)
Dynamic Transducers and Systems
21592 Marilla St. • Chatsworth, CA 91311 • Phone 818-700-7818
• e-mail: info@
Rev A ECN 5980 05/11/09
OPERATING GUIDE
MODEL 3293A MINIATURE TRIAXIAL LIVM ACCELEROMETER
WITH SINGLE 4-PIN CONNECTOR,
CASE GROUNDED
Model 3293A is a low-noise, high sensitivity, miniature LIVM
triaxial accelerometer featuring a single, transverse mounted, 4-
pin electrical connector. This feature allows the 3293A to be
used in situations where vertical space is limited. Model 3293A
is case grounded. The 3293A is a 500mV/g accelerometer.
This Guide contains:
1) Specifications, Model 3293A
2) Outline/Installation Drawing 127-3293A
3) Operating Instructions, Model 3293A
NOTE: LIVM™ is Dytran's trademark for its line of Low Impedance Voltage Mode sensors with built-in amplifiers
operating from constant current sources over two wires. LIVM instruments are compatible with other
manufacturers’ comparable systems labeled IEPE.
SPECIFICATIONS, MODEL 3293A TRIAXIAL ACCELEROMETER
SPECIFICATIONS UNITS
PHYSICAL
WEIGHT 8.8 grams
SIZE (WIDTH x HEIGHT x LENGTH) 0.55 x .37 x .89 inches
MOUNTING 5-40 UNF INTERNAL THD
CONNECTOR [1] 4-PIN
MATERIAL, HOUSING/CONNECTOR TITANIUM ALLOY
PERFORMANCE
SENSITIVITY, ±10% [2] 500
RANGE, F.S. (each axis) ±7
FREQUENCY RESPONSE, ±10% 0.25 to 4000
PHASE RESPONSE, ±5º 1 to 3000
ELEMENT NATURAL FREQUENCY >15
ELECTRICAL NOISE FLOOR .0002
LINEARITY, MAX [3] 1
TRANSVERSE SENSITIVITY, MAX 6
SIGNAL POLARITY POSITIVE FOR MOTION IN DIRECTION OF
ARROWS ON HOUSING
mV/g
g
Hz
Hz
kHz
grms
% FS
%
ENVIRONMENTAL
MAXIMUM VIBRATION
MAXIMUM SHOCK
TEMPERATURE RANGE
ENVIRONMENTAL SEAL
COEFFICIENT OF THERMAL SENSITIVITY
ELECTRICAL
SUPPLY CURRENT RANGE, (each axis) [4]
COMPLIANCE (SUPPLY) VOLTAGE RANGE (each axis)
OUTPUT IMPEDANCE, TYP.
OUTPUT BIAS VOLTAGE
DISCHARGE TIME CONSTANT, NOM.
GROUND ISOLATION
SUPPLIED ACCESORIES:
± 50
1000
-60 to +185
HERMETIC
.07
gpk
gpk
°F
%/°F
2 to 20
+18 to +30
150
+11 to +13
1.0 to 1.5
CASE GROUNDED
mA
VDC
Ohms
VDC
sec
MODEL 6580, MOUNTING STUD 5-40 TO 5-40
[1] Connector mates with Dytran cable assy. Model 6811AXX or 6824AXX. (xx = length in feet)
[2] Reference sensitivity measured at 100 Hz, 1 grms per ISA RP 37.2
[3] Linearity is % of specified full scale (or any lesser full scale range), zero-based best-fit straight line method.
[4] Power only with LIVM Dytran constant current type power unit. If power
is applied without current limiting protection, the internal amplifier will be immediately destroyed.
Rev A ECN 5980 05/11/09
2
OPERATING INSTRUCTIONS
MODEL 3293A TRIAXIAL ACCELEROMETER WITH TEDS
INTRODUCTION
Model 3293A is a miniature three-axis
accelerometer using the latest in ceramic shear
technology coupled with 2-wire internal LIVM
electronics.
This instrument contains three miniature
ceramic laminar shear mode accelerometer elements
mounted to a single support and welded into a titanium
housing. The three elements are mounted
orthogonally to each other so that they can measure
the complete motion of a point.
Model 3293A has an internal 5-40 thread for
stud mounting.
LIVM (Low Impedance Voltage Mode) design
means that three miniature IC amplifiers are built into
the instrument, one for each axis, to lower the
impedance of the ceramic seismic elements by many
orders of magnitude. This technique allows the driving
of long cables without affecting sensitivity and the use
of very simple constant current type power units.
DESCRIPTION
Refer to the outline/installation drawing 127-
3293A for the dimensions of Model 3293A.
This novel accelerometer features three
modular style ceramic elements mounted to a single
vertical post. Each planar shear mode element is
connected to a miniature IEPE amplifier. The element
assembly is mounted in a titanium housing.
The electrical connections from the elements
are brought out to the contacts of a four-pin connector
mounted transversely to a vertical face of the housing.
The three signal/power connections to the elements
are connected to three separate pins while the three
ground returns for the elements are tied together to
one common pin of the four-pin connector. The case
of this instrument is connected to electrical ground.
The performance specifications and criteria for
Model 3293A are delineated on the specification sheet
included with this operating guide.
Rev A ECN 5980 05/11/09
INSTALLATION
Select a smooth surface approx. .70 in
diameter and clean off all debris which would preclude
an intimate surface contact. Although the 3293A has
an internal thread for mounting, it may also be
adhesively mounted. Various adhesives may be use
to mount Model 3293A but the adhesives of choice for
ease of use are any of the cyanoacrylate “instant”
adhesives. They are tough and they set almost
instantly. They also do not need a thick bond line
which is good for high frequency response. The
selected (or prepared) mounting area should be flat to
within .001 in TIR for best high frequency response.
NOTE: Before mounting, be sure to clean the
mounting surface thoroughly to avoid inclusion
of machining chips and other debris between
mating surfaces. Intimate contact between
mating surfaces is important for best
performance.
Spread a light layer of adhesive on the
mounting surface and apply the 3293A to the
mounting area in the desired orientation and press and
hold firmly for several seconds.
If a fair amount of motion is expected during
the test, it is good practice to tie the cable down to a
stationary point as close as possible to the
accelerometer (but not closer than 1 inch) to avoid
potentially damaging cable whip. You are now ready to
connect the 3293A to the power unit.
OPERATION
The 3293A may be operated with standard
IEPE signal conditioners.
Be sure to check the orientation of each axis
with the markings on the instrument upper surface
and/or the outline/installation drawing supplied with the
Operating Guide. The polarity of each axis is also
define with arrows marked on the side surface of the
3293A and again, on the outline/installation drawing
127-3293A. The arrows indicate the direction and
sense of motion of the accelerometer that will produce
positive-going output signals. The vertical axis, axis Z,
produces positive-going output voltage when the
accelerometer is accelerated upward, i.e., away from
the mounting surface.
3
REMOVAL (OR UNINSTALLATION)
It is very important when removing this
instrument to remember that, although it is built to be
very rugged, it is a sensitive measuring instrument and
as such should be treated gently when being removed
from its installation. Never strike the unit to break it
free from its mounting surface. Simply grip two
opposing flats with an adjustable or open-end wrench
and gently twist the instrument until the mounting
interface (stud or adhesive) is broken. This method
avoids any trauma to the instrument and will help
ensure a long life for the accelerometer.
MAINTENANCE AND REPAIR
This instrument is not field repairable. No
maintenance is required, or possible. If a problem
occurs, contact the factory for help. You will be
assigned a Returned Material Authorization (RMA)
number should the instrument have to be returned to
the factory for evaluation. A short note describing the
problem will facilitate the repair procedure.
There is no charge for evaluation of the
instrument and we will perform no repair work until you
are notified of any charges.
It is good practice to return the instrument to
the factory for recalibration from time to time with
frequency of recalibration dependent on usage
intensity and frequency.
Rev A ECN 5980 05/11/09
4