Triplett 9055 - Manual (Page 7)

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2.1 Read all instructions in this manual before using
this meter. Failure to do so may result in damage to
the meter or injury to the user.
2.2 Prior to using the meter in any situation which could
result in injury to the user, in order to verify that the
meter is functional and producing a valid reading,
test the meter on a circuit(s) known to have
potentials equivalent to the potential that is to be
measured. For example, before using the meter to
determine if an AC power line is energized with
120VAC, test the meter on a line known to be
energized with 120VAC. Failure to do so may result
in damage to the meter or injury to the user.
2.3 Do not use this meter with its case open, or with
parts removed. Doing so may damage the meter
and/or injure the user.
2.4 When using this meter in schools and workshops,
responsible teachers or skilled personnel must
control the usage of this meter. Failure to observe
this precaution may result in damage to the meter
or injury to the user.