The Instek GSB01 8 Channel High Voltage Scanner Box has a function that distributes the test voltage or current provided by the models GPT-9800/9900/9900A series to multiple test points. Up to eight channels can be used for outputs on one scanner. Up to four scanners can be connected to the tester, allowing a maximum of 32 channels. The user can conduct AC/DC withstanding, insulation resistance and ground bond test on test points depending selected scanner model.

An electric potential mode for each channel - HI (voltage applied), LO (return) and X (open mode) can be set either by the front panel operation or through commands by the USB/GPIB(Option) of models GPT-9800/9900/9900A. The multiplex scanner permits specified setting - AC/DC withstanding or insulation resistance or ground bond tests on assigned one of the eight test channel.