Prokit's Industries MT-1820 - Manual (Page 5)

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7. Do not store and use the instrument in high humility, high
temperature, combustible, explosive and strong magnetic places.
8. It is possible to damage the instrument and endanger the safety
of the users when measuring the voltage over the range limit. The
allowed maximum voltage is printed on the front panel of the
instrument, do not input the range limit specified to avoid the
electric shock and instrument damage
9. Do not measure any voltage when connecting the test lead with
the current terminal to avoid damaging the instrument and
endangering the safety of the users.
10. Do not try to calibrate or repair the instrument, should operate it
by the specially trained or qualified professional people.
11. The function/range selection knob should be set in the correct
range when measuring. When switching the function/range
selection knob, keep the test lead off the tested object to make sure
there is no any signal at the input terminal. Do not switch the
function/range selection knob when measuring.
12. When LCD displays “
”, please replace the battery in time to
make sure the measuring accuracy.
13. Do not allow to measure the voltage when connecting the test
lead with the current terminal!
14. Do not try to modify the inner circuit at will to avoid damaging
the instrument and endangering the safety of the users.
Safety Symbol Description
Warning DCA
High Voltage!
Dangerous!
ACA
GND DCA & ACA
Dual Insulation
Meets the direction
of European IEC
Low Battery Fuse