A go/no-go load box from Associated Research, the TVB-2 allows production engineers and test specialists to verify the failure detectors of all AR electrical safety test instruments before performing hipot, insulation-resistance, ground-bond, and ground-continuity tests. Used daily, the TVB-2 offers a quick and simple means of checking the functionality of the electrical safety tester.
The TVB-2 employs resistors of varying types to induce a pass or fail condition, depending on the test parameters that are set in the electrical safety tester. Eight banana jacks located on the top of the box can be used to apply the corresponding load to the output of the tester. When all connections have been made, just press the TEST button to begin the test. The trip setting may vary up to 10% of the set value based on the combined tolerances of the instrument and the components used in the TVB-2.
Dimensions of the test verification box are 7.3×5.75×2.95 in. (186×146×75 mm). The unit weighs just 1.55 lbs and operates over a temperature range of 32°F to 104°F (0 to 40°C).