2.2.2 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.
2.2.3 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 illuminate if the cell temperature is outside of 0 °C to 40 °C charging range.
The red LED can also illuminate if the wrong charger has been used such that the charging current is
greater than 4 A.
2.3 Product safety category – measurement connection
The product safety category, in accordance with IEC 61010, determines which parts of an electrical installation an
instrument may be safely used on. The category ratings are explained below. When used with approved Megger test-
leads, MFT-X1 instrument has a CAT IV 300 V and CAT III 600 V rating, but with some accessories, this rating may be
reduced. The reductions will be explained in the sections dealing with these modes and accessories.
WARNING : When using a test instrument, the applicable product safety category is always that of the
lowest rated component in the measurement circuit.
2.3.1 Safety category voltage
The voltage that forms part of the category rating (CAT IV 300 V or CAT III 600 V) is the maximum line-to-earth
voltage to which the instrument can be connected on that type of circuit.
2.3.2 CAT IV
Instruments with a CAT IV safety rating can be connected to circuits between the origin of the low-voltage mains
power supply and the distribution panel, provide that there is at least one protective device between the origin of the
supply and the point of connection of the instrument. If there is no such protective device, a temporary protective
device should be fitted. Alternatively, subject to the outcome of a risk assessment, it may be permissible to use fused
test-leads. Instruments with a CAT IV safety rating can also be connected to circuits between the distribution panel
and the electrical outlets and to circuits between the electrical outlets and the user equipment.
2.3.3 CAT III
Equipment with a CAT III safety rating can be connected to circuits between the distribution and the electrical outlets,
and to equipment between the electrical outlets and the user’s equipment
2.3.4 CAT II
Equipment with a CAT II safety rating can be connected to circuits 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.
www.megger.com
MFT-X1
14
Safety Warnings
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