External control of Hipot tester (Automatic Insulation/Withstanding HiTester 3153)

QTesting won't not stop when I connect the STOP and GND terminals on the external I/O terminals of the 3153. I used the same method for a separate model 3158 and 3159, but they could be controlled without any problem. What could be the cause?

A

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Hipot tester's control keys do not work. (Automatic Insulation/Withstanding HiTester 3153)

QUsing the model 3153 with a PLC (Programmable logic controller) connected to the external I/O terminals. I’m trying to change the settings, but the STOP key does not work. What is the cause?

A

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A

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A

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