Safety Warnings - Megger MFT-X1 Guide Rapide

Earth Test Warnings
When measuring resistance of an earth electrode while the distribution system is energised, the following additional
warnings apply.
„ All persons involved must be trained and competent in isolation and safety procedures for the system to be
worked on. They must be clearly instructed not to touch the earth electrode, test stakes, test leads, or their
terminations if any 'Live' earths may be encountered. It is recommended that they wear appropriate rubber gloves,
rubber soled shoes, and stand on a rubber mat.
„ The earth electrode under test must be isolated from the circuit it is protecting before testing commences.
If this is not possible, ART (attached Rod Technique) may be used to measure electrode resistance.
„ The instrument terminals must be connected to the system under test through isolation switches that are rated to
handle the likely maximum fault voltages and currents that could be encountered at the installation.
The isolation switch must be open whilst any personal contact is made with the remote test stakes,
or the connecting leads, e.g. when changing their position.
„ The instrument terminals should be connected to the system under test through fuses that are rated to handle the
likely maximum fault voltages and currents that could be encountered at the installation.
„ Special precautions are necessary when working in wet conditions or in agricultural areas: observe the local safety
standards and take all necessary special precautions applicable to the particular location and do not touch the test
leads with bare hands.
Li-ION Battery Module warnings
This instrument may be provided with a lithium-ion high energy battery module.
„ Do not pierce, damage, disassemble or modify the battery module. The battery module contains safety and
protection devices which, if tampered with, may cause the battery to generate heat, rupture or ignite.
„ If a battery is suspected to be faulty, replace it with a Megger approved battery module.
„ If an instrument is suspected to contain a faulty battery module, the module must be removed before the
instrument is shipped.
„ Do not ship a faulty battery module, either separately or connected to an instrument.
„ The battery module must be charged only with an MBC2100 Li-ION battery charger in a dry environment.
Li-ION battery care:
Only use the charger supplied by Megger Instruments Limited.
Please fully charge the Li-ion battery before using it for the first time. The green LED on the battery indicates normal
charging. Disconnect the charger from the battery after the LED on the charger has changed to green colour.
„ The red LED will come on if the cell temperature is outside of 0°C to 40 °C charging range.
„ The red LED can also come on if the wrong charger has been used such that the charging current is greater than
4 A.
Installation Category Definitions:
„ CAT IV - Measurement category IV: Equipment connected between the origin of the low-voltage mains supply and
distribution panel.
„ CAT III -Measurement category III: Equipment connected between the distribution panel and electrical outlets.
„ CAT II - Measurement category II: Equipment connected between the electrical outlets and 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.
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Safety warnings

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