2-32 Acc elerometer – Am p lified
Model 3140
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
FEATURES
Bolt Mount
±0.5% Non-linearity (typical)
±2.0% Temperature Performance
DC Response
Built-in Damping
Built-in Overrange Stops
Low Power
STANDARD RANGES
Range g
±2 ●
±5 ●
±10 ●
±20 ●
±50 ●
±100 ●
DESCRIPTION
The Model 3140 is a high performance accelerometer intended
for instrumentation applications. The 3140 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
acce lerometer with signal conditioning electronics in a light-
weight Valox™ housing that can be easily attached to a mount-
ing su rfac e .
The sensing element is a micro machined silicon mass sus-
pended by multiple beams from a silicon frame. P iezoresistors
lo cated in the beams c hange their re sistance as th e motion of the
suspended mass changes the strain in the beams. Silicon caps on
the top and bottom of the device are added to prov ide over -
ran g e st o p s . Th is de sign pro v id e s f o r a very low pro f il e, hi g h
shock resistance, durability and built-in damping over a wide
usabl e bandwidth.
A lower cost version of the 3140 is available for applica-
tions that do not require the temperature performance offer ed
with the 3140. Please refer to the Model 3145 for additional
information.
DIMENSIONS
Signal Conditioned Accelerometer Model 3140
Accelerometer – Amplified
June 2001
PERFORMANCE SPECIFICATIONS
Supply Current: 12 VDC
Ambient Temperature: 25°C (Unless otherwise specified)
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. Actual test data for this parameter is included on the calibration sheet
provided with each sensor.
3. Includes repeatability, hysteresis, and linearity (best fit straight line).
4. Compensated temperature range: -20°C to +85°C in reference to 25°C.
5. 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 Pin 2 and Pin 4 would be ± 2 VDC. If a single ended
output signal is preferred (0.5-4.5 VDC), make no connection to Pin 2.
To avoid damage to the internal voltage regulator, do not connect Pin 2
to Pin 1 (gnd). Minimum load resistance connected to Pin 2 without
affecting output is 100 kΩ.
6. 10 Hz to 1 kHz.
7. To use an alternate electrical connector, refer to the following color code
for proper electrical connections: Pin 1 - Green; Pin 2 - Yellow;
Pin 3 - Red; Pin 4 - Blue; Pin 5 - Shield. Note: Removing the connector
voids the product warranty.
8. The useful frequency range is defined as the range of frequencies over
which the device sensitivity is within ±5% of the DC value.
ORDERING INFORMATION CONNECTIONS
PARAMETERS
RANGE
±2G ±5G ±10G ±20G ±50G ±100G
Frequency Response [MIN] See notes 2, 8 0-200 0-300 0-400 0-500 0-600 0-1500
Mounted Resonant Frequency [MIN] See note 2 450 600 950 1500 2750 3000
Sensitivity (Nominal) 1 V/g 400mV/g 200mV/g 100mV/g 40mV/g 20mV/g
PARAMETERS MIN TYP MAX UNITS NOTES
Full Scale Output Span 3.92 4.00 4.08 Volts 1, 2
Zero Acceleration Output 2.46 2.50 2.54 Volts 1, 2
Accuracy 0.5 1.0 ±% Span 3
Transverse Sensitivity 1.0 3.0 ±% Span
Temperature Error - Span (-20°C to +85°C) 1.0 2.0 ±% Span 2, 4
Temperature Error - Zero (-20°C to +85°C) 1.0 2.0 ±% Span 2, 4
Supply Voltage 8.0 12.0 30.0 Volts
Supply Current 5.0 mA
Reference Voltage 2.5 Volts 5
Output Resistance 0.1 Ω
Output Noise 0.5 mV p-p 6
Output Load Resistance 5 kΩ
Acceleration Limits 20X Rated
Operating Temperature -20°C to +85°C
Storage Temperature -40°C to +125°C
Weight (Including Cable) 13 Grams
3140 - 002
Acceleration Range
Model
LEADER Electronic Co., Ltd - 116, Jianghuali, Jianghua Road, Jiangmen City, GD, PRC
Tel: + 86 750 3101711, 3379183 Fax: + 86 750 3388669 Website: www.leadersensors.com - e-mail: leader@leadersensors.com
