Triplett 9007 - Manual (Page 13)

Page 12
2.44 Avoid usage near strong RF fields (radio or television
transmitters, walkie talkies, cellular phones, etc.).
The meter may display readings that are in error, causing
the user to misinterpret the hazards present. For example,
the meter may indicate a low voltage when high voltages are
actually present. Failure to observe this precaution may
result in damage to the meter or injury to the user.
2.45 Remove the battery when the meter may be left unused for
longer than 1 month. Chemical leakage from the battery
could damage the meter, leading to user injury.
2.46 Do not attempt to test charged capacitors. Only discharged
capacitors may be tested. If you wish to test a capacitor,
discharge it using an approved method before connecting it
to the meter. Caution: Some capacitors can store dangerous
lethal charges. Discharging these capacitors can be
dangerous unless an approved method is used. Failure
to observe this precaution may result in damage to the
meter or injury to the user.