MZC-304
– USER MANUAL
3
1
Safety
The MZC-304 meter is designed for testing the protection against electric shock in the mains sys-
tems. The meter is used to make measurements which results determine the electrical installation
safety level. Consequently, in order to ensure safe operation and correct measurement results, ob-
serve the following recommendations:
Before you proceed to operate the meter, acquaint yourself thoroughly with the present manual
and observe the safety regulations and recommendations of the manufacturer.
Any application that differs from those specified in the present manual may cause damage of the
instrument and a serious hazard to its user.
The MZC-304 meters must be operated solely by appropriately qualified personnel with relevant
certificates to perform measurements of electric installation. Operation of the instrument by unau-
thorized personnel may result in damage to the device and constitute a hazard to the user.
Using this manual does not exclude the need to comply with occupational health and safety regu-
lations and with other relevant fire regulations required during the performance of a particular type
of work. Before starting the work with the device in special environments, e.g. potentially fire-
risk/explosive environment, it is necessary to consult it with the person responsible for health and
safety.
It is unacceptable to operate the following:
a damaged meter which is completely or partially out of order,
leads with damaged insulation,
a meter which ahs been stored to long in unsuitable conditions (for example is wet). When the
meter is transferred from cold environment to warm and humid one, do not make measure-
ments until the meter warms up to the ambient temperature (about 30 minutes).
Remember that the
message on the display means that the power supply voltage is too low
and indicates the need to replace/ charge the batteries. The measurements performed with the
meter with insufficient supply voltage have additional measuring errors which are impossible to be
evaluated by the user and cannot be the basis to determine the correct protection of the tested in-
stallation.
Do not leave the discharged batteries in the meter as they can leak and damage the instrument.
Before starting the measurement, check if the leads are connected to correct measuring termi-
nals.
Never use the meters with open or only partially closed battery compartment cover and use only
the power supplies specified in this manual.
Repairs may be performed solely by an authorized service outlet.
NOTE
Use only standard and optional accessories intended for a given instrument which are
listed in the “Equipment” section. Using other accessories may cause damage of the
measuring terminal and additional measuring errors.
Note:
An attempt to install drivers in 64-bit Windows 8 may result in displaying "Installation
failed" message.
Cause: Windows 8 by default blocks drivers without a digital signature.
Solution: Disable the driver signature enforcement in Windows.
