Safety Instructions - UNI-T UT256A Operating Manual

UT256A User Manual
III. Safety Instructions
The meter is designed according to IEC/EN61010-1, IEC/
EN61010-2-033 and EN61326-1 safety standards, and
conforms to CAT II 1000V, CAT III 600V, double insulation,
and pollution degree 2. Use the meter only as specified, or
the protection provided by the meter may be impaired.
1. Before use, please check if there is any item which is
damaged or behaving abnormally. If any abnormal item
(such as bare test lead, damaged meter casing, broken
LCD, etc.) is found, or if the meter is considered to be
malfunctioning, please do not use the meter.
2. Do not use the meter if the rear cover or battery cover is
not covered up, or it will pose a shock hazard!
3. Before each use, verify meter operation by measuring a
known voltage.
4. When using the meter, keep fingers behind the finger
guards of the test leads, and do not touch exposed wires,
connectors, unused inputs, or circuits being measured to
prevent electric shock.
5. Place the function switch in the correct position before
measurement. It is forbidden to change the position during
measurement.
6. Do not apply more than the rated voltage, as marked on
the meter, between any meter terminal and earth ground
to prevent electric shock or damage to the meter.
7. Use caution when working with voltages above AC 30Vrms,
42Vpeak or DC 60V. Such voltages pose a shock hazard.
5
UT256A User Manual
8. Never input a voltage or current which exceeds the specified
limit. If the range of the measured value is unknown, the
maximum range should be selected.
9. Before measuring the resistance and continuity online,
switch off the power supply of the circuit, and fully discharge
all capacitors to avoid inaccurate measurement.
10. When the " " symbol appears on the LCD, please
replace the batteries in time to ensure measurement
accuracy. If the meter is not in use for a long time, please
remove the batteries.
11. Do not change the internal circuit of the meter to avoid
damage to the meter or user!
12. Do not use or store the meter in high temperature, high
humidity, flammable, explosive or strong magnetic field
environments.
13. Clean the meter casing with a soft cloth and mild detergent.
Do not use abrasives or solvents!
6