1 Safety
ERP-1 adapter is designed to adapt MRU meters (manufactured by Sonel SA) for the measure-
ments of earth resistance of various objects e.g. power pillars, using flexible clamps (Rogowski coil).
The adapter is designed to work with earth resistance meters that provide the user with a choice of
performing the measurement using 3-wire method with measurement clamps. In order to ensure correct
operation, the following recommendations must be observed:
Before you proceed to operate the adapter, acquaint yourself thoroughly with this manual and ob-
serve the safety regulations and specifications provided by the producer.
Any application that differs from those specified in the present manual may result in a damage to
the adapter and constitute a source of danger for the user.
The Adapter should be operated only by suitably qualified persons having the necessary permis-
sions to carry out measurements on electrical systems. Operating the Adapter by unauthorised
personnel 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 regu-
lations and with other relevant fire regulations required during the performance of a particular type
of work. Beforestarting the work with the device in special environments, e.g. potentiallyfire-risk/ex-
plosive environment, it is necessary to consult it with the person responsible for health and safety.
It is unacceptable to operate the device when:
it is damaged and completely or partially out of order,
its cords and cables have damaged insulation,
it has been stored for an excessive period of time in disadvantageous conditions (e.g. excessive
humidity). After moving the device from a cool to a warm place with a high level of relative
humidity, do not start measurements until the device is warmed up to the ambient tem-
perature (approximately 30 minutes).
Do not operate the adapter with an open or incorrectly closed battery (accumulator) compartment
or power it from other sources than those specified in the present manual.
Repairs may be performed only by an authorised service point.
The device meets the requirements of EN 61010-1.