Prokit's Industries MT-1620 - Manual (Page 44)

NOTE:
 The polarity of the battery can not be set
inversely.
5.2 FUSE REPLACEMENT
WARNING
To avoid electrical shock, remove test leads
from measurement circuits before replacing
the fuse.
For protection against fire, replace fuses
only with specified ratings:
F 500mA/250V (quick acting).
5.2.1 Fuse rarely need replacement and blow
almost always as a result of the operator’s
error.
5.2.2 Loosen the fixing screw of the case and
remove it.
5.2.3 Replace the blown fuse with ratings
specified.
5.2.4 Put the case as its origin.
- 43-