MRU-200-GPS OPERATING MANUAL Version 1.06
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1
Safety
Electrical systems depend upon effective grounding for safety. The MRU-200-GPS meter has been
designed to perform earth ground resistance measurements to determine whether the grounding of
electrical systems meets electrical safety code requirements. For correct operation, and to ensure
the accuracy of test results, observe the following instructions:
•
Before operating the meter, acquaint yourself thoroughly with this manual and adhere to all safe-
ty regulations and specifications.
•
The MRU-200-GPS meter has been designed to test and measure the resistance of earth/ground
connections and equipotential bonding, measure ground resistivity, as well as measure current.
Any application that differs from those specified in this manual may result in damage to the de-
vice and injury to the user.
•
The device must be operated only by appropriately qualified personnel trained in the safety of
electric installations. Operation of the meter by unauthorized personnel may result in damage to
the device and injury to the user.
•
Using this manual does not exclude the need to comply with occupational health and safety regu-
lations and with relevant fire regulations. Before starting work in special environments, e.g. with
fire risks, explosive environments etc., always consult first with the person responsible for health
and safety.
•
Do not operate the meter:
If the meter is completely or partially malfunctioning.
If the meter has damaged test leads or insulation.
If the meter has been stored in adverse conditions (e.g. excessive humidity or heat).
If the meter is transferred from a cold to a warmer environment with high relative humidity
do not perform measurements until the meter has been warmed up to the ambient temper-
ature (approximately 30 minutes).
•
Before starting any measurements make sure the test leads are connected to the appropriate
measurement sockets and are fully inserted.
•
Do not operate a meter with an open or partially closed battery compartment or power it from
sources other than those specified.
•
The meter’s inputs are electronically protected from power surges, for example in the case of ac-
cidental connection to a power source, up to 276V for 30 seconds for all input combinations.
•
Repairs must only be performed by Sonel or an authorized Sonel service center.
•
The device complies with the following norms: EN 61010-1 and EN 61557-1, -4, -5.
Note:
The manufacturer reserves the right to modify the appearance, accessories and
technical data of the meter.
Note:
An attempt to install drivers in 64-bit Windows 8 and Windows 10 may result in
displaying "Installation failed" message.
Cause: Windows 8 and Windows 10 by default blocks drivers without a digital
signature.
Solution: Disable the driver signature enforcement in Windows.
