With self-diagnostics to ensure data integrity, ReferenceMate™ delivers known vibration level that enables users in field to verify sensor performance and integrity of cabling and connectors between sensor and DAQ system. Portable vibration reference source provides frequency outputs of 61.4 Hz for imperial measurements, 100 Hz to simulate standard calibration conditions, and 159.2 Hz for metric measurements. LED indicators illuminate if battery levels are low or if unit is overloaded.