Model 3150
Signal Conditioned Accelerometer
0.5 to 4.5 VDC Output
Intergral Temperature Compensation
High Performance
Vibration/Shock Testing
Geophysical Monitoring
Modal Analysis
Structural Analysis
Elevator Ride Control
DESCRIPTION
The Model 3150 is a high performance accelerometer intended
for instrumentation applications. The 3150 provides a fully sig-
nal conditioned output with performance similar to traditional
instrumentation accelerometers but at a much lower cost.
The accelerometer consists of a silicon micro machined
accelerometer with signal conditioning electronics in a
lightweight Valox™ housing that can be easily attached to a
mounting surface.
The sensing element is a micro machined silicon mass
suspended by multiple beams from a silicon frame.
Piezoresistors located in the beams change their resistance as the
motion of the suspended mass changes the strain in the beams.
Silicon caps on the top and bottom of the device are added to
provide over-range stops. This design provides for a very low
FEATURES
Bolt Mount
±0.5% Non-linearity (typical)
±2.0% Temperature Performance
DC Response
Built-in Damping
Built-in Overrange Stops
Low Power
profile, high shock resistance, durability and built-in damping
over a wide usable bandwidth.
DIMENSIONS
STANDARD RANGES
Range
±2
±5
±10
±20
±50
±100
g
●
●
●
●
●
●
2-36
Accelerometer – Amplified
Signal Conditioned Accelerometer
PERFORMANCE SPECIFICATIONS
Supply Current: 12 VDC, Ambient Temperature: 25°C (Unless otherwise specified)
RANGE
PARAMETERS
Frequency Response [MIN]
Mounted Resonant Frequency [MIN]
Sensitivity (Nominal)
PARAMETERS
Full Scale Output Span
Zero Acceleration Output
Accuracy
Transverse Sensitivity
Temperature Error - Span (–20°C to +85°C)
Temperature Error - Zero (–20°C to +85°C)
Supply Voltage
Supply Current
Reference Voltage
Output Resistance
Output Noise
Output Load Resistance
Acceleration Limits
Operating Temperature
Storage Temperature
Weight (Including Cable)
–20°C to +85°C
–40°C to +125°C
13 Grams
5.
2
20X
8.0
±2G
0-200
450
1 V/g
MIN
3.92
2.46
±5G
0-300
600
400
±10G
0-400
950
200
TYP
4.00
2.50
0.5
1.0
1.0
1.0
12.0
5.0
2.5
0.1
0.5
±20G
0-500
1500
100
±50G
0-1000
2750
40
MAX
4.08
2.54
1.0
3.0
2.0
2.0
30.0
±100G
0-1500
3000
20
Model 3150
UNITS
Hz
Hz
mV/g
UNITS
Volts
Volts
±% Span
±% Span
±% Span
±% Span
Volts
mA
Volts
NOTES
2, 7
2
NOTES
1, 2
1, 2
3
2, 4
2, 4
5
Ω
mV p-p
k
Ω
Rated
6
Notes
1. The output voltage increases from the Zero Acceleration Output for
positive acceleration and decreases for negative acceleration. The
sensitivity is then 2V/Range. For example, the ±5g range has a
sensitivity of 2V/5g or 400mV/g.
2.
3.
4.
Actual test data for this parameter is included on the calibration sheet
provided with each sensor.
Includes repeatability, hysteresis, and linearity (best fit straight line).
Compensated temperature range: –20°C to +85°C in reference to 25°C.
Pin 2 provides an optional 2.5V reference which may be used, if desired,
to provide a stable zero-g reference. Thus, the full scale differential
output between REF and OUTPUT would be ±2 VDC. If a single-ended
output signal is preferred (0.5-4.5 VDC), make no connection to REF. To
avoid damage to the internal voltage regulator, do not connect REF to
GND. Minimum load resistance connected to REF without affecting
output is 100 k
Ω.
10 Hz to 1 kHz.
The useful frequency range is defined as the range of frequencies over
which the device sensitivity is within ±5% of the DC value.
6.
7.
ORDERING INFORMATION
3150 - 002
Acceleration Range
Model
CONNECTIONS
June 2001
Accelerometer – Amplified
Feel free to contact customer service with any questions at
Toll free 1(800)745-8008; Phone (757)766-1500; Fax (757)766-4297
2-37
Microcontroller MCU
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