HT instruments HT14N - Manual (Page 9)

HT-14N
EN - 8
4.3. PREVENTIVE MAINTENANCE
4.3.1. General information
1. This multimeter is a precision instrument. Whether in use or in storage, please do not
exceed the specification requirements to avoid any possible damage or danger during
use.
2. Do not place this meter in high temperature or humidity or expose to direct sunlight.
3. Be sure to turn the meter off after use. For long time storage, remove the battery to
avoid leakage of battery liquid that would damage the interior parts.
4. To prevent mechanical damage of analog pointer coil do not submit the instrument to
vibration or shock.
4.3.2. Battery replacement
When the pointer doesn’t reach the 0
Ω even adjusting the “0Ω ADJ” knob replace battery.
WARNING
Before attempting battery removal disconnect test leads from any energised
circuits to avoid electrical shock.
1. Set range switch to OFF position.
2. Disconnect the test leads from the circuit under test.
3. Remove the protective case, the screws from the battery cover, and detach the battery
covers from the bottom cover.
4. Remove the battery and replace it with a new one of the same type (UM3 single 1.5Volt
AA size battery, IEC LR6) observing the proper polarity from the diagram inside the
battery compartment.
5. Replace the battery cover, screws and protective case.
4.3.3. Fuse replacement
WARNING
Before attempting fuse removal disconnect test leads from any energised
circuits to avoid electrical shock.
1. Set range switch to OFF position.
2. Disconnect the test leads from the circuit under test.
3. Remove the protective case, the screws from the battery cover, and detach the battery
covers from the bottom cover.
4. Remove the battery, the screws inside the battery compartment and the screw placed
in the case bottom.
5. Replace the fuse with a new one only with identical type and rating (500mA/250V).
6. Replace case, battery cover, screws and protective case.
4.3.4. Cleaning
For cleaning the instrument use a soft dry cloth. Never use a wet cloth, solvents or water,
etc.
4.3.5. End of life
Caution: this symbol indicates that equipment and its accessories shall be
subject to a separate collection and correct disposal.