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Setting a lock code on a DM300C, DM400C, DM450C, and DM475

Learn how to set or change the current lock code on a DM300C, DM400C, DM450C, and DM475.
Products affected: DM300C™, DM400C™, DM450C™, DM475™

Follow these steps to set up a code that will be required to use the meter:

  1. Press Menu.
  2. Select Setup.
  3. Select Lock Code/Password.
  4. Select Change Lock Code. If you have a lock code, you will be prompted to enter it now.
  5. Enter the new lock code.
  6. Select Accept.
  7. Re-enter the new lock code to confirm.
  8. Select Accept.
  9. At the Lock Code Enabled message, select OK.

UPDATED: December 06, 2024