3.5 Maintenance

Cleaning

If used frequently, 2N^® Analog Vario, especially the keypad, gets dirty. To clean it, use a piece of soft cloth moistened with clean water. We recommend you to obey the following principles while cleaning:

• Never use aggressive detergents (such as abrasives or strong disinfectants);
• Clean the device in dry weather in order to make waste water evaporate quickly.
  
  

Label Replacement, Programming Status Changes

For necessary steps refer to the preceding subsections. Keep the following for later changes:

• this manual;
• the completed programming form (including a copy);
• unused transparent foil strips for button labels.