Safety Advice - Martindale Electric VT12 Instruction Manual

If the probe tip shrouds are not fitted, great
care must be taken when testing CAT III
and CAT IV installations to avoid the risk of
shorting high energy circuits and arc flash.
Do not use the voltage tester in damp
conditions.
Do not use the voltage tester if the battery
casing is not fitted.
Always keep your fingers behind the finger
guards. Never touch the exposed metal prod
tips.
The different indicating signals of the voltage
tester (including the ELV limit indication) are
not to be used for measuring purposes.
The voltage tester must not be dismantled
or modified in any way by unauthorized
persons. The safety of the voltage
tester cannot be guaranteed under such
circumstances and it must not be used.
Cautions
Avoid severe mechanical shock or vibration
and extreme temperature.
If the voltage tester has been stored or
transported in temperatures outside its
normal operating range it should be given
sufficient time to stabilise in the environment
where it is to be used. An acclimatisation
time of at least 2 hours is required prior to
operation of the voltage tester.
To avoid possible corrosion from leaking
batteries, remove the batteries if discharged,
or when the unit is not in use for an
extended period.

1.3 Safety Advice

Depending on the internal impedance of
the voltage tester there will be a different
capability of indicating the presence or
absence of operating voltage in case of the
presence of interference voltage.
A voltage tester of relatively low internal
impedance, compared to the reference value
of 100kΩ, will not indicate all interference
voltages having an original voltage value
above the ELV level. When in contact with
the parts to be tested, the voltage tester
may discharge temporarily the interference
voltage to a level below the ELV, but it will be
back to the original value when the voltage
tester is removed.
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