JBL PROFLORA pH Control Touch Manual De Instrucciones página 40

Open with the following steps:
Settings key > select Contrast > press OK > select the desired value using "plus" and "minus" >
press OK.
Factory setting: middle level.
Key lock
  
Open with the following steps:
Settings key > select Key Lock > press OK > confirm with "locked"/"unlocked" > press OK.
For selection "locked" > enter the password (4-digit number), press OK.
After locking the 4-space number field appears when any key is pressed. Enter the 4-digit
password (press OK. The keys are now unlocked again.) In the event that you forget the
password, you can unlock the device with the following master password: 7422.
In the value overview (chapter 4) a symbol for keys locked (red padlock locked) and for keys
unlocked (green padlock unlocked) appear.
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