HF Series

Accelerometers
VIBRATION, HF SERIES
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Low Noise, Wide Bandwidth
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Easy to Use
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Constant Current or
Constant Voltage Excitation
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±10 g and ±100 g Ranges
Applications
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accelerometers
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Vehicle and Engine Testing
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Shock Recording
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Predictive Maintenance
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Industrial Vibration Monitoring
HF SERIES
The HF Series accelerometers are
precision vibration sensors based on
an advanced piezoelectric material
integrated with signal conditioning
(charge amp) and current regulation
electronics. The sensor features low
noise, 300 µgrms, and wide bandwidth, 0.3 -10,000 Hz. The sensor’s
electronics are uniquely designed to
be compatible with both current
loop systems and voltage mode
systems. Unlike the other Crossbow
accelerometer series, the HF Series
does not have a DC response,
which means the unit will not
respond to gravity or other very low
frequency (<0.3 Hz) signals.
The sensor is an excellent choice for
vibration monitoring of all kinds:
vehicle and engine testing, shock
recording, predictive maintenance,
industrial vibration monitoring,
acoustic and high frequency
measurements.
The sensor is delivered with a
calibration sheet which standardizes
the sensitivity to within 2%. The
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sensor is available in two packages,
a standard nylon package, and
an optional high temperature
aluminum package.
The sensor can be powered by a
current source using the signal wire
and ground. If powered by a current
source, the signal wire is used as
both the excitation signal and the
sensor signal. A constant current of
0.3-20 mA is provided by either a
current source such as a battery
box, signal conditioner, or analyzer
instrument with current source I/O
capability. This interface allows the
sensor backward compatibility with
many older systems.
As an alternative to the constant
current excitation, an unregulated
+5 to +30 VDC power supply can
be used. The output signal span is
±1 V centered about 3 V. The 3 V
signal is the zero-g voltage offset.
This interface is compatible with the
Crossbow accessories family and
eliminates cumbersome and costly
interface electronics, e.g., battery
powered and line powered signal
conditioners.
Specifications
CXL10HF1Z
CXL10HF3
CXL100HF1Z CXL100HF3
accelerometers
Performance
Input Range (g)1
± 10
± 10
± 100
± 100
± 100
± 100
± 10
± 10
Sensitivity (mV/g)1
Transverse Sensitivity (% FS) 5
5
5
5
Non-Linearity (% of FS)
1
1
1
1
0.18
0.18
0.18
Sensitivity Drift /Temp (%/oC) 0.18
Strain Sensitivity (g/µe)
0.0001
0.0001
0.0001
0.0001
Broadband Noise (µg rms)
300
300
300
300
0.3-10,000*
0.3-10,000*
0.3-10,000*
0.3-10,000*
Bandwidth (Hz) 2
2.5
2.5
2.5
2.5
Start Up Time (sec) 5
Environment
Nylon Package
-40 to +85o
-40 to +85 o
-40 to +85 o
-40 to +85 o
Oper. Temp. Range (o C)
Storage Temp. Range (o C)
-50 to +85o
-50 to +85 o
-50 to +85 o
-50 to +85 o
High Temperature Casing
-40 to +125o
-40 to +125o
-40 to +125o
-40 to +125o
Oper. Temperature (o C)
o
o
o
o
Storage Temperature ( C)
-50 to +125
-50 to +125
-50 to +125
-50 to +125o
Shock (g) 4
5000
5000
5000
5000
Electrical
Voltage Mode
5 - 30
5 - 30
5 - 30
5 - 30
Supply Voltage (VDC)6
0.4
1
0.4
1
Supply Current (mA)6
Current Mode
5 - 30
5 - 30
5 - 30
5 - 30
Supply Voltage (VDC)7
Current (constant) (mA)
0.3 - 20
0.3 - 20
0.3 - 20
0.3 - 20
3±1
3±1
3±1
3±1
Zero g Output (VDC)3
Span Voltage (V)
±1
±1
±1
±1
Physical
Size
Standard package
0.75” x 1.875” x 1.00 (1.90 cm x 4.76 cm x 2.54 cm)
Aluminum package
0.95” x 2.00” x 1.20” (2.41 cm x 5.08 cm x 3.05 cm)
Weight
Standard package
1.59 oz (45 gm)
Notes
All frequency break points are -3 dB, single pole, -6 dB per octave roll-off. Non-linearity is the deviation from a best fit straight line
at full scale. Transverse sensitivity is error measured in the primary axis output created by forces induced in the orthogonal axis.
Transverse sensitivity error is primarily due to the effects of misalignment (i.e., much of it can be tuned out by adjusting the
package orientation).
* Maximum Frequency Response - package and mounting dependent.
1. ±2%, Calibration sheet provided
2. ±3dB, AC coupled sensor
5. within 10%
3. Ignore if used with current source excitation
6. when used in voltage mode
4. 1 ms half sine
7. excitation voltage and signal share wire
Specifications subject to change without notice
Pin
Color
Function
1
2
3
4
5
Red
Black
White
Yellow
Green
Power In
Ground
X-axis Out
Y-axis Out
Z-axis Out
Pin Diagram
High Temperature Package
Ordering Information
Model
CXL10HF1Z
CXL10HF3
CXL100HF1Z
CXL100HF3
OPTIONS
-AL
Axes
Span (g)
Z
TRI
Z
TRI
± 10
± 10
± 100
± 100
Sensitivity (V/g)
± 100
± 100
± 10
± 10
Bandwidth (Hz)
0.3-10,000
0.3-10,000
0.3-10,000
0.3-10,000
High Temperature Package (see package drawing above)
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