Safety Advices; Intended Use - METREL MD 1060-LED Manual Del Usuario

If the safety of the user cannot be guaranteed, the tester must be switched off and secured
against unintentional use.
Safety is no longer guaranteed e.g. in the following cases:
− obvious damage
− broken housing, cracks in housing
− if the tester can no longer perform the required measurements/ tests
− stored for too long in unfavorable conditions
− damaged during transport
− leaking batteries
The tester complies with all EMC regulations. Nevertheless it can happen in rare cases that
electric devices are disturbed by the electrical field of the tester or the tester is disturbed by
electrical devices.
Never use the tester in explosive environment.
Tester must be operated by trained users only.
Operational safety is no longer guaranteed if the tester is modified or altered.
The tester may be opened by an authorized service technician only.

Safety advices

Depending on the internal impedance of the voltage detector there will be a different
capability of indicating the presence or absence of operating voltage in case of the
presence of interference voltage.
A voltage detector of relatively low internal impedance, compared to the reference value of
100 kΩ, will not indicate all interference voltages having an original voltage value above the
ELV level. When in contact with the parts to be tested, the voltage detector may discharge
temporarily the interference voltage to a level below the ELV, but it will be back to the
original value when the voltage detector is removed.
When the indication "voltage present" does not appear, it is highly recommended installing
earthing equipment before work.
A voltage detector of relatively high internal impedance, compared to the reference value of
100 kΩ, may not permit to clearly indicate the absence of operating voltage in case of
presence of interference voltage.
When the indication "voltage present" appears on a part that is expected to be
disconnected of the installation, it is highly recommended confirming by another means
(e.g. use of an adequate voltage detector, visual check of the disconnecting point of the
electric circuit, etc.) that there is no operating voltage on the part to be tested and to
conclude that the voltage indicated by the voltage detector is an interference voltage.
A voltage detector declaring two values of internal impedance has passed a performance
test of managing interference voltages and is (within technical limits) able to distinguish
operating voltage from interference voltage and has a means to directly or indirectly
indicate which type of voltage is present.

Intended use

The tester may be used only under the conditions and for the purposes for which it was designed.
Therefore, observe in particular the safety instructions, the technical data including environmental
conditions.
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MD 1060, MD 1160