TESTO 535 - Accessories and Spare Parts

11 Tips and assistance
35
Question Possible cause Possible solution
Display responds
sluggishly
Ambient temperature is
very low
Increase ambient
temperature
Display: -----
Sensor error
Please contact your dealer
or Customer Service.
Display: OOOOO
Permissible measuring
range has been exceeded
Keep within the permissible
measuring range
Display: UUUUU Permissible measuring
range has been undershot
Keep within the permissible
measuring range
Display: BT Fail
Bluetooth connection
could not be established
• Check Bluetooth
®
connections.
•
Restart measuring
instrument, restart testo
Smart App.
Display: Print Fail
Printout could not be
performed successfully
• Check Bluetooth
®
connections, switch off
and then on again if
necessary.
•
Switch printer off and then
on again.
Display: Probe Fail
Probe damage
Please contact your dealer
or Customer Service.
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