GUILDLINE INSTRUMENTS 7520 PRECISION AUTOMATED VOLTAGE DIVIDER is the latest innovation in DC Voltage Dividers. PRODUCT FEATURES Patented Automated Self-Alignment (i.e. True Self-Calibration) Incorporated into the Divider NO External Standards Required for Self-Alignment Built-In Wheatstone Bridge, Built-in Voltage Reference, and Built-in Null Detector Advanced Internal Temperature Control Chamber for Resistive Divider Networks Sub-ppm Ratio Uncertainties Provides for Wide Range of Ratios: 1:1, 1:10, 1:100, 1:1000 and Reverse Fully Automated Operation with SCPI Command Set Automates Calibration of Voltage References Calibrates Precision Sources Including Calibrators Calibrates Voltage Measurements including DMMs Color Screen Touch Menu Operation Ethernet / IEEE-488.2 and USB Ports Replaces Old Divider Technology such as the Fluke 752A and Measurements International (MI) 8000B/8001B or Manual Dividers like MI 1340A