What should I do when TOS5300 series shows “Calibration Protection” and cannot perform tests?

The Calibration Protection function has been activated because the set calibration period has expired.
When this happens:

1. A warning message appears at power-on.
2. TOS5300 series will enter a protection mode, preventing any tests from being performed.

To resume testing:

1. Press the STOP switch.
2. Access the Configuration Menu by pressing the CONFIG (SHIFT + Function) key.
3. Navigate to Configuration menu > 3. Date and Time > Calibration Protection and set to OFF.

However, periodic calibration is recommended to maintain optimal performance.
Please contact your Kikusui agent or distributor to request calibration services.