Sonel WMGBMPI525 User Manual page 7

MPI-525 meter is designed for performing check tests of protection against electric shock in mains
systems. The meter is used for making the measurements the results of which determine safety of
electrical installations. Therefore, in order to provide conditions for correct operation and the correctness
of the obtained results, the following recommendations must be observed:

Before you proceed to operate the meter, acquaint yourself thoroughly with the present manual and
observe the safety regulations and specifications determined by the producer.

The MPI-525 meter has been designed for the purpose of measurements of short-circuit loop im-
pedance, earth connection and equipotential bonding resistance, RCDs parameters as well as in-
sulation resistance measurements. Any application that differs from those specified in the present
manual may result in a damage to the device and constitute a source of danger for the user.

The device must be operated solely by appropriately qualified personnel with relevant certificates to
realise measurements of electric installation. Operation of the meter realised by unauthorised per-
sonnel may result in damage to the device and constitute a source of danger for the user.

Using this manual does not exclude the need to comply with occupational health and safety regula-
tions 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/ex-
plosive 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,
 A meter with damaged test leads insulation,
 A meter stored for an excessive period of time in disadvantageous conditions (e.g. excessive
humidity). If the meter has been transferred from a cool to a warm environment of a high level
of relative humidity, do not realise measurements until the meter has been warmed up to the
ambient temperature (approximately 30 minutes).

It should be remembered that BAT message appearing on the display indicates that supply voltage
of the meter is too low. This message signals also that the batteries must be replaced or the accu-
mulator charged. Measurements performed by means of the meter whose supply voltage is too low
are burdened with additional errors that are impossible to be estimated by the user. Such measure-
ments must not be relied on in order to state correctness of protection of a network tested.

Battery spill and damage to the meter may occur if discharged batteries are left in the meter.

Before measurements may commence, make sure the test leads are connected to the appropriate
measurement sockets.

Do not operate a meter with an open or incorrectly closed battery (accumulator) compartment or
power it from other sources than those specified in the present manual.

The R inputs of the meter are protected electronically from overload (e.g. due to having been
ISO
connected to a live circuit) up to 440V rms for 60 seconds.

Repairs may be realised solely by an authorised service point.
Only accessories for a given device should be used. Use of different accessories can lead to errors
in the test connection and can introduce additional measurement uncertainties.
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 presented in this operating manual.
An attempt to install drivers in 64-bit Windows 8 may result in displaying "Installation failed" mes-
sage.
Cause: Windows 8 by default blocks drivers without a digital signature.
Solution: Disable the driver signature enforcement in Windows.
1 Safety
ATTENTION!
Attention:
Note:
MPI-525 – USER MANUAL
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