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Transistor tester won't start self test mode

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Tesla777

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I've got a transistor tester 1.12k version and it says it's not calibrated. When I connect the 3 different pins together it asks if I want to run self test mode. I press the button within 2 seconds (as the manual suggests) but instead of calibration menu it just makes a single test and displays resistance. Is there any way to get it into self test mode and calibrate it?
 
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