1 Safety
MIC-2501 meter is designed for performing check tests of protection against electric shock in mains
systems. The meter is used for making measurements and providing results to determine safety of
electrical installations. Therefore, in order to provide conditions for correct operation and accuracy of
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 provided by the producer.
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.
MIC-2501 meters must be operated only by appropriately qualified personnel with relevant certifi-
cates authorising the personnelto perform works on electricsystems. Unauthorized use of the meter
may result in its damage and may be a source of serious hazard to the user.
During measurements of insulation resistance, dangerous voltage of approx. 2.5kV occurs at the
ends of measurement wires of the meter.
Before themeasurement of insulation resistance youmust besure that tested object is disconnected
from the power supply.
During the measurement of insulation resistance do not disconnect test leads from the tested object
before the measurement is completed (see par. 4.1); otherwise the capacitance of the object will
not be discharged, creating the risk of electric shock.
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 device when:
a damaged meter which is completely or partially out of order,
a meter with damaged insulation,
a meter stored for an excessive period of time in disadvantageous conditions (e.g. excessive
humidity).If themeter has been transferred from a cool to a warm environment with a high level of
relative humidity, do not start measurements until the meter is warmed up to the ambient tem-
perature (approximately 30 minutes).
Remember that bAt message appearing on the display indicates insufficientvoltage of power supply
and the need to recharge the batteries.
Message ErrXdisplayed in the main field, where Xis a number from 0 to 9, indicate incorrect oper-
ation of the meter. If after restarting the device this situation is repeated - it indicates that the meter
is damaged. Please contact the manufacturer's service.
Before measurement, choose a correct measurement function and make sure that test leads are
connected to respective measuring terminals.
Do not power the meter from sources other than those listed in this manual.
The RISO inputs of the meter are protected electronically from overload (e.g. due to having been
connected to a live circuit) up to 750V rms for 60 seconds.
Repairs may be performed only by an authorised service point.
