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DJB Instruments UK Ltd
Piezo-Electric Accelerometers - A/123/E

Piezo-Electric Accelerometers - A/123/E

Product catalog summary

Specifications:
- Conversion Mode: KONIC / 2 WIRE QVC
- Voltage Sensitivity: 10, 100 mV/g
- Resonant Frequency: Approximately 50 kHz
- Cross Axis Error: Maximum 5%
- Temperature Range: -50 to +185°C
- Voltage Sensitivity Deviation at 20°C: -5% at 50°C, +5% at +125°C, +/- 10% at +185°C
- Supply Voltage: 15/35 V standard
- Supply Current: 2/15 mA
- Bias Voltage: 8/10 V
- Settling Time to 90% Final Value: Less than 1 second
- Maximum Continuous Acceleration: 1000 G sine
- Saturation Limit: 500/750 g
- Noise Level: Equivalent to 3 mg
- Frequency Response: 1 Hz to 8 kHz
- Low Frequency Corner Frequency: 5 to 7 Hz
- Case Material: Stainless Steel, 303 S31
- Mounting Options: Adhesive or M5 x 7mm Internal Stud
- Weight: 2.5 gm (A/123/E, TE), 5.5 gm (A/123/S, TS)
- Case Seal: Welded

Product Description:
The A/123 range of Piezo-tronic accelerometers is designed for applications such as modal analysis of lightweight structures and shock measurements. These accelerometers feature a hybrid QVC design with options for side or top entry connectors and integral stud or flat base for adhesive mounting. The design minimizes phase/gain errors associated with the lower corner frequency of the QVCs, maintaining a +/-5% corner frequency tolerance and a +/- 1/2 degree phase tolerance at the nominal corner frequency. The accelerometers can measure peak shocks up to 600g with certain bandwidth response conditions.

Performance Characteristics:
- Peak shock measurement capability up to 600g
- Rise time characterized by a single low-frequency pole air
- Droop of 10% of peak value for 20 ms rectangular pulses
- Overshoot caused by ringing is 10% for a rise time of 30 µSec, which may lead to signal clipping if excessive

Recommendations:
- Voltage sensitivities are standard, but a wide range of sensitivities is available upon request.
- Applications should be evaluated to determine the requisite sensitivity.

Graphical Data:
The document includes a graph showing the temperature response of different models (A/123/E, A/123/S, A/123/TS, A/123/TE) with sensitivity deviation plotted against frequency.

Catalog excerpts

Piezo-Electric Accelerometers - A/123/E-1

^)DJB Instruments 123/E/ SI TE/ TS Piezo-tronic Voltage Accelerometer accelerometers includes a hybrid QVC, packaged to offer choice of side/top entry connector, integral stud or flat base (for adhesive mounting). Applications including modal analysis of lightweight structures and shock measurements are subject to individual phase/gain errors associated with the lower corner frequency of the QVC's. The radiometric nature of the modal analysis however reduces transfer function uncertainty to the associated lower corner frequency variations of individual QVC's. Thus a +1-5% corner frequency tolerance associated a +/- 1/2 degree phase tolerance at the nominal corner frequency. Peak shock of up to 600g with certain provisos relating to bandwidth response characterized by a single low frequency pole air, giving rise time. Droop will be 10% of peak pulses, for QVC corner frequency = 0.7Hz. Overshoot caused by ringing will be 10% for rise time 30u.Sec. and if excessive may lead to signal NOTE: Voltage sensitivities shown are standard. We offer a wide range recommend that applications are evaluated to determine the requisite Cross Axis error % max Voltage sensitivity deviation re 20 °C Settling time to 90% final val. sees Max continuous accn. G sine Noise level, equiv. mg Frequency Response Case material Case seal- Finchley Avenue, Email [email protected] A UK company with UK-based manufacturing, assembly and calibration in-house.

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Piezo-Electric Accelerometers - A/123/E

Piezo-Electric Accelerometers - A/123/E

Catalog excerpts

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