This instruction manual provides technical detail for the single-axis accelerometers in wax mount configuration.
This manual provides instructions for using Endevco’s Model 727 piezoresistive drop-test accelerometers, designed for shock measurements in consumer electronics. It covers handling precautions, mounting procedures, cable handling, and electrical specifications. The accelerometers are undamped and lack mechanical stops to maximize bandwidth and linearity. Users must handle them carefully to avoid damage, especially during unmounted handling. Mounting requires a smooth, clean surface with specific roughness and flatness tolerances. Cable routing and strain relief are critical to prevent damage and signal degradation. Electrical considerations include excitation voltage, signal leads, and cable length effects.
| Excitation Voltage | 10.000±0.005 Vdc (max 12 Vdc without damage) |
|---|---|
| Input/Output Resistance | 650 Ω ± 300 Ω |
| 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 (the maximum excitation voltage without damage is 12 Vdc).
Mount the accelerometer on a smooth, clean surface with a surface roughness of 32 micro inches rms or better and a surface flatness tolerance of 0.0003". Use Aremco CrystalbondTM 509 for mounting up to 60°C.
Perform a resistance test to verify the integrity of the Wheatstone bridge. If resistance measurements are outside the specified tolerance, consult the factory for troubleshooting.