During a vibration test, the Test Conductor notices that an accelerometer's output is showing erratic spikes inconsistent with other nearby sensors. What is the most appropriate initial action to validate the data?

1. Note the anomaly in the test log and continue the test without deviation.
2. Request that the sensor be recalibrated immediately after the test concludes.
3. Correlate the data with adjacent sensors and check the data acquisition system's channel health status.
4. Abort the test immediately to prevent potential damage to the test article.