Accelerometers VIBRATION, HF SERIES ▼ Low Noise, Wide Bandwidth ▼ Easy to Use ▼ Constant Current or Constant Voltage Excitation ▼ ±10 g and ±100 g Ranges Applications ▼ accelerometers ▼ Vehicle and Engine Testing ▼ Shock Recording ▼ Predictive Maintenance ▼ 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 ▼ 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) ▼