A third generation micro-ohmmeter made by Vanguard Instruments Company, the Vanguard Auto-ohm 100A Automatic Digital Low Resistance Ohmmeter features microprocessor-controlled measuring of very low resistances ranging from 1 micro-ohm to 300 milli-ohms with high accuracy.
The Vanguard Auto-ohm 100A features an output current of 10 amperes to 100 amperes, an automatic test mode, controlled rise and fall current, and a backlit LCD making it convenient when testing in dark places.
It also has a thermally protected power supply and conforms to the IEC61010, ULC61010A-1 and CSA C22.2 standards, is field-portable, rugged, and easily operated by first-time users having a minimum of training.
The VO’s features a logical and simple one-knob control operation:
- Turning the knob scrolls through a menu of possible options (displays in sequence).
- Pressing the knob activates the selected function.
Operation of the Vanguard Auto-ohm 100A is automatic, requiring little more from the user than connecting it to an unknown resistance and selecting the desired functions and its options. The Ohmmeter automatically stores the last 3 resistance measurements, which can be displayed after testing.