HBM QuantumX Manuel D'emploi page 128

Safety instructions
12
DANGER
For measurements within CAT IV, there is a risk of
S electric shock
S arc flash burns
S arc blast explosion and
S other phenomena.
The MX809B is only suitable for rated voltages within the
measurement categories described - the MX809B is not
suitable for any other applications at the low-voltage
installation and its use here is not permitted.
DANGER
Outside the measurement categories described in EN
61010, the peak voltage, loop impedance, occasional
overvoltage and maximum possible transient overvolt­
ages of these circuits must be analyzed before measur­
ing the working voltage.
These values may not exceed the ratings of the
MX809B, otherwise the protection provided by the device
will be impaired.
A3757-2.2 HBM: public
MX809B