How to set an optical power meter to not turn it off
If you want to disable this auto shut-off function and keep this instrument working, please press and hold the "MODE" button immediately when power on for about 2 seconds until "PERM" appears on the bottom right screen of the LCD, meaning that the power saving function has been. Select POWER, Source, then: ■ To set reference, push Abs/Rel and hold Set Ref for 3 seconds (3 buzzer sounds). ■ INTRODUCTION AND APPLICATIONS N3970A OPTICAL POWER METER Congratulations on your. A general description is followed by explanations of how to operate the unit remotely via the serial RS232 connection. Short press the power button to turn on machine, and automatically start the auto-off function, the default auto-off time is 10 minutes. There are four possibilities the indic tor may show, full, with 2 blacks, with 1 black and empty. If an empty battery indicator mean the power is almost out please replace it with a new one.
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