TESTO 720, Instruction Manual

Page: 24 / 56

3. Production description 24
Important displays
Display Meaning
Battery capacity (bottom right in display):
· 4 segments in the battery symbol are lit: Instrument battery is fully
charged
· No segments in the battery symbol are lit: Battery is almost spent
Print function: Readings are sent to the printer
Upper alarm limit: Lit if exceeded
Lower alarm limit: Lit if undershot
3.2 Interfaces
Infrared interface
Measurement data can be sent to a Testo printer via the
infrared interface on the head of the instrument.
Probe socket
A plug-in measuring probe can be connected via the probe
socket on the head of the instrument.
3.3 Voltage supply
Voltage is supplied by means of a 9V monobloc battery
(included in delivery) or rechargeable battery. It is not
possible to run the instrument from the mains supply or
charge a rechargeable battery in the instrument.