TESTO 425 - Accessories and Spare Parts

11 Tips and assistance
35
Question Possible cause Possible solution
Display: OTA Fail
The update process "over
the air" of the measuring
instrument could not be
completed successfully.
Restart the measuring
instrument and testo Smart
App and check the
Bluetooth
®
connection.
Display: APP Lost
Connection to the testo
Smart App was
interrupted. Keys are
locked for 3 s.
Restart the measuring
instrument and testo Smart
App and check the
Bluetooth
®
connection.
11.2 Accessories and spare parts
Description
Order no.
Bluetooth
®
/IRDA printer
0554 0621
1.888.610.7664 sales@GlobalTestSupply.com
www.Testo-Direc t.com