Enter setup mode (parameter setting).
With nothing connected to the output terminals, set the ZK-5KX output voltage to the exact floating charge target (e.g., 14.4V for a 12V Lead-Acid battery, or 4.2V for a single 18650 Li-ion cell). Zk-5kx Manual
the U/I button twice (or wait 10 seconds) to save and exit to the main menu. B. Setting Output Current/Limit (CC Mode) Enter setup mode (parameter setting)
Default is 36V (User adjustable: 0.6V–36V). You do not need to install an extra
Prevents battery voltage from flowing back into the module. You do not need to install an extra diode when charging batteries.
Short press SW until the output voltage calibration screen appears. Turn the output ON. Connect your meter to the output terminals. Rotate the encoder until the display perfectly matches the meter. Short press SW to save.
If you meant a different (e.g., from a non-security field), please provide the brand or device type (motor controller, RF module, etc.) and I will revise the guide accordingly.