Sonel MZC-320S User Manual page 9


One should remember that when the word Bat! appears on the display, it indicates insufficient
voltage of power supply and the need to charge the battery. Measurements performed by means
of the meter whose supply voltage is too low are burdened with additional errors that are impossi-
ble to be estimated by the user. Such measurements must not be relied on in order to state cor-
rectness of protection of a tested network.

Before measurements may commence, make sure the leads are connected to the appropriate
measurement sockets.

Repairs may be performed only by an authorized service point.

The correct operation of the instrument and accessories must be checked regularly to avoid any
hazard which may result from erroneous results.

In a situation where the product works with other instruments or accessories, the lowest meas-
urement category of the connected devices is used.
WARNING
Only standard and additional accessories for a given device should be used. Using
other accessories may cause damage to measuring terminals and introduce additional
measurement uncertainty.

An attempt to install drivers in 64-bit Windows 8 and Windows 10 may result in dis-
playing "Installation failed" message.
o Cause: Windows 8 and Windows 10 by default blocks drivers without a digital
signature.
o Solution: Disable the driver signature enforcement in Windows.

Due to continuous development of the meter's software, the actual appearance of
the display, in case of some of the functions, may slightly differ from the display pre-
sented in this operating manual.
MZC-320S ● MZC-330S – USER MANUAL
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