Vanguard Instruments | A Doble company
SGT-200 (Safety Ground Tester)
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- SGT-200
- : (Safety Ground Tester)
The Vanguard SGT-200 Safety Ground Tester is a 200A DC micro-ohmmeter designed specifically to measure the resistance of protective in-service grounding and jumper cable assemblies.
The SGT-200 can measure the resistance of the grounding cables, clamps and ferrules.
The measured resistance values can be compared against the calculated values (using the ASTM 2249-03 standard) and a Pass/Fail result can be printed along with the measured resistance values. Since the SGT-200 uses a DC current, there is no need to uncoil the cable undertest. It can be conveniently tested in its coiled state in a much smaller testing enviornment.
In-Service Cable Testing
The SGT-200 measures the total resistance value of the cable under test and then compares it to the calculated value to determine the Pass or Fail result. In order to calculate the total resistance value, the user is first prompted for the cable size, cable length, and cable temperature. Total resistance (Rm) is calculated in accordance with the ASTM F2249-03 standard using the formula below:
Rm = 1.05 RL + 2Y = 1.05 RL + 320 μΩ*
Documentation
- Model SGT-200 User Manual
- Download PDF(4KB)*
- Model SGT-200 Data Sheet
- Download PDF(4KB)*
