How to resolve a low sector message on the DM300c, DM400c and more

Products affected: DM300C™, DM400C™, DM450C™, DM475™


The meter displays the message Low Sector and will not turn on.


The internal meter software has failed.


UPDATED: September 1, 2017
You may be able to clear the error by restarting the meter. To restart safely, follow these steps:
  1. Unplug the power cord, wait three minutes
  2. Plug the power cord back in, ensuring that it is plugged directly into a wall outlet
If the issue is still not resolved, contact customer support from 8 am to 8 pm Eastern Time. Please have your model number ready.