To set up the test mode, including double action, follow the steps below:

1. Press CONFIG (SHIFT + Function) key to enter the Configuration Menu and select “1. Test Mode and Buzzer”.
2. Use the Up (MEMORY2) key or Down (MEMORY3) key to move to the desired setting, then select it with the rotary knob.

For more details, read the user’s manual – chapter of Appendix – Configuration Settings.