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.


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.

UPDATED: September 01, 2017