Chauvin Arnoux AmpFlex A110 Notice De Fonctionnement page 33

OL
The green On indicator remains on but its brightness varies to indicate
Auto Power Off
P
that the batteries are OK.
On
While the external power supply is present, automatic power off is disabled. But if the supply is cut off,
the batteries take over and automatic power off acts at the end of 10 minutes.
If you make long‑duration records, you must deactivate automatic power off (see § 2.2.6).
The insulation between the type B micro‑USB connector and the measurement output is 1000 V CAT III or
600 V CAT IV. That makes it possible to connect the device without risk to wattmeters having uninsulated
inputs. The type B micro‑USB connector must not be in contact with conductors or uninsulated parts at
dangerous voltages.
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