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? 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 under test. It can be conveniently tested in its coiled state in a much smaller testing enviornment.
The SGT-200 can measure resistance value from 1 micro-ohm to 1000 milliohms. A typical test requires the two ends of the safety ground cable to be connected to the terminals of the SGT-200. The resistance of the cable and ferrules can then be measured. If the cable size, cable length and temperature are provided, the SGT-200 will determine if the cables passes or fails the test and a pass/fail indicator will be printed on the test report.
Test results are printed on the unit’s built-in 2.5” thermal printer. A 44-key QWERTY-style rugged membrane keypad is used to input information and control the SGT-200. A back-lit graphic LCD screen (128 x 64 pixels) is used to display menus and test results.
The SGT-200 can store up to 100 test records in its internal memory. It also features a USB Flash drive interface port that can be used to store test data in a USB flash drive (not included). The SGT-200 also features an RS-232C port that is used for factory diagnostics and calibration. Test records can be reviewed and printed on a PC using the provided Vanguard VUS software.
Vanguard SGT-200安全接地测试仪是一款200A直流微欧姆表，用于测量保护在役接地和跨接电缆组件的电阻。SGT-200可以测量接地电缆，夹具和密封垫圈的电阻。可以将测量的电阻值与计算值进行比较，并且可以打印通过/失败结果以及测量的电阻值。由于SGT-200使用直流电流，因此无需拆开被测电缆。它可以在更小的测试环境中以卷绕状态方便地进行测试。
SGT-200可以测量从1微欧到1000毫欧的电阻值。典型测试要求将安全接地电缆的两端连接到SGT-200的端子。然后可以测量电缆和套圈的电阻。如果提供电缆尺寸，电缆长度和温度，SGT-200将确定电缆是否通过测试，并且测试报告上将打印通过/未通过指示器。
测试结果打印在本机的内置2.5英寸热敏打印机上。44键QWERTY型坚固薄膜键盘用于输入信息和控制SGT-200。背光图形LCD屏幕（128 x 64像素）用于显示菜单和测试结果。
SGT-200可在其内部存储器中存储多达100条测试记录。它还具有USB闪存驱动器接口端口，可用于将测试数据存储在USB闪存驱动器中（不包括在内）。SGT-200还具有RS-232C端口，用于工厂诊断和校准。可以使用提供的Vanguard VUS软件在PC上查看和打印测试记录。
安全接地测试仪
产品功能和性能：
用来测量安全接地电缆和跨接电缆组件的电阻。
产品卖点：
1）符合ASTM F2249-03 标准测试安全接地电缆；
2）测试电流达到 200A；
3）测量电阻，并判断和标注“通过/失败”测试结果；
4）内置热敏打印机；
5）USB 闪存接口；RS232接口用于工厂诊断和校验。
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