• 1 to 200A programmable test current
• Resitance range: 1µΩ..10mΩ at 200A to 1µΩ..5Ω at 1A
• Very lightweight: 19.8 lbs. (8.9 Kg)
• Measures circuit breaker contact resistance with safety ground on (with the Dual Ground option)
• Stores test records on-board or on external USB Flash drive
• Built-in 2.5" wide thermal printer

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.

Part number DMOM-200 S3 DMOM-200 S3 micro-ohmmeter with test cables

Part number DGO DMOM-200 S3 dual ground option

Part number DMOM-200 S3 CASE DMOM-200 S3 shipping case

Part number DMOM-200 S3 15 FT CABLE DMOM-200 S3 15-foot cable set

Part number DMOM-200 S3 30 FT CABLE DMOM-200 S3 30-foot cable set

Part number DMOM-200 S3 C-CLAMP SET DMOM-200 S3 C-clamp set (2 clamps)

Part number DMOM-200 S3 HAND SPIKE DMOM-200 S3 hand spike probe (15-foot)

Part number TP3 2.5" wide thermal printer paper