This is a Endevco® Model 727 series of drop test accelerometers, which has undamped and maximum bandwidth and amplitude linearity features.
This manual provides detailed instructions for using Endevco’s Model 727 piezoresistive drop-test accelerometers. It covers handling precautions, mounting surface preparation, cable handling, and electrical considerations including excitation voltage and cable length effects. The document emphasizes careful handling to avoid damage, especially due to resonance risks, and includes guidance on mounting with wax or adhesive, cable strain relief, and signal conditioning for optimal performance.
The manual also includes initial checkout procedures, such as resistance testing, and specifies mounting surface requirements (e.g., 32 micro inches rms roughness). It warns against using inappropriate adhesives or immersing the unit in liquids and provides recommendations for cable routing and signal conditioning to maintain accuracy under high-shock conditions.
| Excitation Voltage | 10.000±0.005 Vdc (max 12 Vdc without damage) |
|---|---|
| Input/Output Resistance | 650 Ω ± 300 Ω |
| Mounting Surface Roughness | 32 micro inches rms or better |
The drop-test accelerometers are calibrated using an excitation voltage of 10.000±0.005 Vdc, unless otherwise specified at the time of order.
There may be a problem with the accelerometer; consult the factory for further troubleshooting.