Megger MTR105, User Manual

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„ All test leads, probes and crocodile clips must be in good order, clean and with no broken or cracked insulation.
„
Verify the integrity of the test leads before use. Only “Megger” approved test leads must be used with this
product.
„ The safe maximum limit of a measurement connection is that of the lowest rated component in the
measurement circuit formed by the instrument, test leads and any accessories.
„
Ensure that hands remain behind finger guards of probes/clips.
„ Replacement fuses must be of the correct type and rating. Failure to fit the correctly rated fuse will result in fire
and burns hazards and cause damage to the instrument in the event of an overload.
„
All covers must be in place whilst conducting tests.
„ This product is not intrinsically safe. Do not use in an explosive atmosphere.
„
Ensure every cell in the battery compartment is of identical type. Never mix rechargeable and non-chargeable
cells.
1.2.1 Test lead safety warnings
„ The circuit under test must be switched off, de-energized, isolated and checked to be safe before insulation test
connections are made. Make sure the circuit is not re-energized while the instrument is connected.
„
Test leads, including crocodile clips, must be in good condition, clean, dry and free of broken or cracked
insulation. The lead set or its components must not be used if any part of it is damaged.
„ The safe maximum limit of a measurement connection is that of the lowest rated component in the
measurement circuit formed by the instrument, test leads and any accessories.
„
The CAT III 600 V rated thermocouple probe tip and protective ring are conductive. Care must be taken when
using the probe on live systems not to short-circuit to adjacent conductors.
1.3 Product Safety Category - Measurement Connection
Only Megger supplied test leads designed for this instrument provide the full safety rating.
1.3.1 Voltage
The rated measurement connection voltage is the maximum line to earth voltage at which it is safe to connect.
1.3.2 CAT IV
Measurement category IV: Equipment connected between the origin of the low-voltage Mains Power supply and the
distribution panel.
1.3.3 CAT III
Measurement category III: Equipment connected between the distribution panel and the electrical outlets.
1.3.4 CAT II
Measurement category II: Equipment connected between the electrical outlets and the User’s equipment.
Measurement equipment may be safely connected to circuits at the marked rating or lower. The connection rating is
that of the lowest rated component in the measurement circuit.
Safety Warnings
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