Switch your DMM to resistance mode. Measure continuity from each patient electrode clip to its corresponding pin on the DB15 connector. High resistance ( ) indicates an internal cable break.
If the calibration pulse shows rounded corners (undershoot) or spiked tips (overshoot), the analog filter capacitors on the acquisition board are degrading and need replacement. 4. Preventive Maintenance Checklist carewell ecg 1101 service manual fix