Vanguard ATO-400 Micro Ohmmeter
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Application
- The Vanguard ATO-400 Micro-Ohmmeter is specifically designed for sub-station applications to measure EHV circuit-breaker contact resistances, bushing contact joints, or any low resistance.
Key Features
- Accurately measures low resistances from 1 μΩ to 300 mΩ
- Outputs an un-filtered direct current from 10A to 400A to the DUT
- Typical resistance burn-in time is 5 to 60 seconds, selectable
- Review, print or export data in text or Excel format
- Computer interface via RS-232C or USB port
| Input Power | 100 to 240 Vac 50/60 Hz |
|---|---|
| Resistance reading range | 1 μΩ to 300 mΩ (1 μΩ resolution); Accuracy: ± 1% reading, ± 1 count |
| Test current range | Thermally protected DC power supply, 10 A to 400 A, selectable in 1 A steps |
| Test duration | 5 seconds to 60 seconds, selectable |
| Display | Back-lit LCD Screen (20 characters by 4 lines); viewable in bright sunlight and low light levels |
| Keyboard | Rugged membrane keypad (10 alpha-numeric keys, 6 function keys) |
| Internal test record storage | Stores 63 records of up to 64 readings |
| Computer interfaces | One RS-232C port, One USB port |
| PC software | Windows software is included |
| Safety | Designed to meet IEC61010 (1995), UL61010A-1, CSA-C22.2 standards |
| Environment | Operating: -10°C to 50°C (15°F to 122°F); Storage: -30°C to 70°C (-22°F to 158°F) |
| Humidity | 90% RH @ 40°C (104°F) non-condensing |
| Altitude | 2,000m (6,562 ft) to full safety specifications |
| Cables | 15-foot test cables, ground cable, power cord |
| Weight & dimensions | Dimensions: (16.8W x 12.6H x 10.6D)in. (42.6 x 32.0 x 27)cm Weight: less than 40 lbs (18.1 kg) |
| Options | Transportation case, custom test cable lengths, C-clamps |