Pro's Kit MT-1707 - General Information; Safety Symbols; Maintenance Practices for Safety

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* When appears, the batteries must be replaced immediately. The low
level of a battery will result in incorrect reading on the meter, which is likely
to bring electric shock or personal injury to the operator.
* In measurement, category III voltage and category IV voltage shall not
exceed 1000V and 600V respectively.
* The meter shall not be in service if its case (or part of its case) is
dismantled.
1.1.3 Safety symbol:
The safety symbols that appear on the meter's body and in this Operation
Manual:
Warning, an important safety symbol. The operator
must consult this Operation Manual before using the
meter. Unintended use may lead to the damage to the
device or its components.
AC (alternating current)
DC (direct current)
AC/DC
Ground
Double insulation protection
Fuse
High voltage warning
CAT. III 1000
V
Over-voltage protection
CAT. IV 600 V
Over-voltage protection
1.1.4 Maintenance practices for safety
* The operator must first pull out the test lead when the meter's case is
opened or the battery cover is dismantled.