TESTO 420 - Maintaining the product; Cleaning the Instrument; Tips and assistance; Troubleshooting Common Issues

9 Tips and assistance
23
The PC identifies the testo 420 as a removable medium. In
the event of any formatting, please make sure that the FAT
format is always selected under the file system.
1. Connect the testo 420 to your PC using the USB cable.
- The testo 420 switches on automatically, a window appears on
the PC, select Open folder here. The folders and files saved on
your testo 420 are displayed. The files are available in the file
format *.txt.
8 Maintaining the product
8.1. Cleaning the instrument
Do not use any aggressive cleaning agents or solvents!
Mild household cleaning agents or soap suds may be
used.
> If the housing of the instrument is dirty, clean it with a damp
cloth.
9 Tips and assistance
9.1. Questions and answers
Question Possible causes/solution
For selected parameters,
no values are shown on
the instrument display
(-----)
No temperature/humidity probe is
connected, for instance.
Warning message Can not
turn on! when selecting
certain parameters in the
Display menu.
• This parameter is not available for
the application currently selected.
• Four parameters are already
displayed. Disable the display of
one parameter to enable another
one.