Notes On Operation And Maintenance; Battery Operation; Power Supply Unit Operation - JUMO 202710/30 Operating Manual

2 General information
2.4

Notes on operation and maintenance

NOTE!
The device and sensor must be handled with care and used according to the
technical data (do not throw, do not subject to impact, etc.). The connectors
and sockets must be protected against pollutants.

2.4.1 Battery operation

NOTE!
If
the battery has been used up and must be replaced. However, the device
function remains guaranteed for a certain period of time.
If "bAt" is shown in the top display, the battery voltage is no longer sufficient
for device operation and the battery is now completely used up.
NOTE!
The battery must be removed if the device is stored at an ambient tempera-
ture of over 50 °C. The battery should be removed if the device is not used for
an extended period of time.
It is necessary to set the real-time clock once again after subsequent startup.

2.4.2 Power supply unit operation

CAUTION!
When a power supply unit is connected, its voltage must be between
DC 10.5 V and 12 V. Do not generate any excess voltage! Basic power supply
units may feature excess open circuit voltage, which may lead to malfunction
or destruction of the device!
Prior to connecting the power supply unit to the electricity grid, it must be
ensured that the operating voltage stated on the power supply unit corre-
sponds to the mains voltage.
8
All manuals and user guides at all-guides.com
is displayed at the same time as "bAt" is shown in the bottom display,