Hewlett Packard/ Sanborn Division. Instruction Manual for Sanborn ECG Preamplifier (Model 60-200). The Table of Contents is divided into the following Paragraphs: Introduction, Controls, Power Supply, Input Connectors, Operation: Using the Input Jacks, Operation: Preliminary Steps, Operating the System, ECG Technique (A Good Recording, Tremor, Alternating Current Interference, Wandering Baseline, Irregular Baseline, Indistrinct Baseline, Troubleshooting), Maintenance (Testing and Replacing Calibration Cells, Decay Curve Adjustment, Positive Voltage Adjustment, List of Replacements).