Safety - Sonel MMR-620 Operating Manual

The MMR-620 meter has been designed to realise measurements of resistance of dif-
ferent kinds of connections (welded, soldered, contact connections) in electric installations.
The results of the measurements determine the safety conditions of the installation. There-
fore, 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 pro-
ducer.
•
The MMR-620 meter has been designed for the purpose of low-resistance measure-
ments. Any other application than those specified in the present manual may result in a
damage to the device and constitute a source of danger for the user.
•
In case of measurements of installations, sub-assemblies and devices under a danger-
ous voltage, the MMR-620 meters may solely be operated by qualified personnel who
are properly authorised to work on electric installations. Operation of the meter realised
by unauthorised personnel may result in damage to the device and constitute a source
of danger for the user.
•
The device cannot be used in the grid and with other devices in special interiors, for
example those of a dangerous atmosphere regarding the risk of explosion or fire.
•
It is unacceptable to operate the following:
•
A damaged meter which is completely or partially out of order,
•
A meter with damaged cable 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 (approxi-
mately 30 minutes).
⇒ Before measurements may commence, make sure the cables 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 meter's inputs are electronically protected from power surge, as a result for
example, of accidental connection to the power supply source:
- for all input combinations – up to 440VAC for 10 seconds.
•
Repairs may be realised solely by an authorised service point.
•
The device complies with the following norm; PN-EN 61010-1
The manufacturer reserves the right to modify the appearance, accessories and
technical data of the meter.
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Safety

Note:
OPERATING MANUAL MMR-620 Revision 1.6 5