Specifications

RIGOL
M300 Selection Guide 5
Fuse
The AC, 250V, T250mA fuse is the alternate power supply fuse for the DMM module; the AC, 250V, T3.15A
fuse is the alternate power supply fuse, as shown in the figure below.
The AC power supply connected via the power socket is divided into two paths with one path providing
power for the DMM module and the other path providing power for the other circuits. M300 provides the
power supply fuse and independent power supply fuse of the DMM module.
To replace the fuses, follow the methods below.
 Replace the power supply fuse of the DMM module
1) Turn off the instrument and remove the power cord.
2) Press down the fuse cap using a straight screwdriver and rotate the screwdriver clockwise.
3) Select the correct voltage scale at the voltage selector.
4) Remove the fuse cap and fuse.
5) Replace the old fuse with a specified fuse and reinstall the fuse cap.
CAUTION
To avoid electric shock or fire, please use the specified fuse.
 Replace the power supply fuse
1) Turn off the instrument and remove the power cord.
2) Insert a small straight screwdriver into the slot at the power socket and pry out the fuse seat.
3) Replace the old fuse with a specified fuse.
4) Reinstall the fuse seat into the slot.
CAUTION
To avoid electric shock or fire, please use the specified fuse and make sure that the
fuse seat is not short-circuited.
Power Supply Fuse of the DMM Module
AC, 250V, T250mA
Power Supply Fuse
AC, 250V, T3.15A