Operating at 159.2 Hz, handheld Model 699A02 delivers controlled, 1 g rms or 1 g peak acceleration to test accelerometers and vibration sensors weighing up to 250 g. It has automatic shut-off to preserve battery life, external power jack for ac compatibility, mechanical stops for overload protection, and capability to perform up to 1,600 operating cycles in field. Unit also meets NIST traceability requirements.