The DMOM-200 S3 is Vanguard’s fourth generation, microprocessor-based, true DC micro-ohmmeter. It is designed for testing EHV circuit-breaker contact resistances, bushing contact joints, welding joints, or for any low-resistance measuring application. This high current and very lightweight (19.8 lbs/ 8.9 Kg) micro-ohmmeter is designed to meet the IEEE C57.09-1999 (5.15) requirement for testing circuit breaker contact resistance. The DMOM-200 S3 can accurately measure resistance values from 1 micro-ohm to 5 ohms. A 0.1 micro-ohm resolution is possible with current greater than 5A. The DMOM-200 S3 applies a selectable true DC test current from 1A to 200A to the resistance load to be tested. The DMOM-200 S3 controls the test current’s rise and fall rates. The test current rise and fall rate can be selected from 5 seconds to 10 seconds. An “Auto Test” mode is also available and can be initiated simply by applying the sense cables’ leads across the two points of interest in the current path. This feature is very convenient when measuring a sequence of several resistance values in a circuit breaker contact. The DMOM-200 S3 can also compare test results against preset limits and determine if a test passed or failed, and a “Pass” or “Fail” flag is displayed accordingly. |
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TYPE | Special-purpose test equipment, portable, micro-ohmmeter |
CONTROL | Heavy duty keypad: 10 number keys, 6 function keys |
SIZE | Dimensions: 18" W x 7"H x 15" D (45.7cm x 17.8cm x 38.1cm) |
WEIGHT | 8.9 kg |
RESISTANCE RANGE | 10 milliohms at 200A to 5 ohms at 1A |
ACCURACY | 1A to 4.99A: 1% ±10 micro-ohms 5A to 9.99A: 1% ± 2 micro-ohms 10A to 200A: 1% ± 1 micro-ohm |
CURRENT RANGE | Auto Ranging, 200 Amperes Max |
DISPLAY | Back-lit LCD (128 x 64 pixels), viewable in direct sunlight and low light levels |
MEMORY | Store 64 records in Flash EEPROM, up to 96 readings per record |
COMPUTER INTERFACE | RS-232C permits test record downloading and diagnostics |
PC SOFTWARE | Windows® 95/98/2000/NT/XP - based software included |
PRINTER | Thermal Printer, 2.5-inch |
CABLES | 3 sets of 50' Test Cables, Ground Cable, Power Cord and Cable Bag |
OPERATING POWER | 85 to 132 V ac / 200-240 V ac, 50/60 Hz |
ENVIRONMENT | Operating: -10ºC to 50ºC (15º to +122º F) Storage: -30ºC to 70ºC (-22º to +158º F) |
OPTIONS | Shipping Case |
WARRANTY | One Year Parts & Labor, Post Warranty Service Contract Available |
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