TESTO 550i - Getting Started: First Steps; Battery Installation and Power Operation

7 First steps
8
7 First steps
7.1 Inserting (rechargeable) batteries
1
Unfold the suspension hook and open the battery compartment (clip
lock).
2
Insert the batteries (in scope of delivery) or rechargeable batteries (3 x
AAA/micro/R03) in the battery compartment. Observe the polarity!
3
Close the battery compartment.

After insertion of the batteries, the instrument switches on
automatically and goes into the settings menu.
When not in use for a long period: Take out the (rechargeable)
batteries.
7.2 Switching the instrument on and off
7.2.1 Switching the instrument on
1
Press the on/off button.

The LED indicator flashes. The instrument is on.
7.2.2 Switching the instrument off
1
Press the on/off switch >2 s.

The LED indicator turns off. The instrument is switched off.
7.3 LED status
LED status Description
Lit up green
Instrument is connected to a mobile
device and has sufficient power.
Flashing orange
Search for a Bluetooth
®
connection
begins.
Flashing red
Battery is weak or there is a
malfunction.