RIGOL DM3068 - Manual (Page 29)

Chapter 1 Quick Start RIGOL
User’s Guide for DM3068 1-11
6. Ext Trig
Trigger the multimeter by connecting a trigger pulse through the [Ext Trig]
connector. Note the external trigger source must be selected (
 Source 
Ext).
7. USB Device
Connect the PC through this interface. You can use SCPI commands or PC
software to control DM3068 remotely.
8. RS232
Connect the PC through this interface. You can use SCPI commands or PC
software to control DM3068 remotely. You can also use this interface to output
the P/F test result.
9. Power Fuse
The multimeter is already installed with a power fuse before leaving factory. To
replace a new one, please:
1) Turn off the multimeter and remove the power cord.
2) Press down the block tongue using a straight screwdriver (in the direction of
the dotted arrow in the figure below) and pull out of the fuse seat.
3) Select a proper voltage scale.
4) Replace a specified fuse.
5) Reinstall the fuse seat into the slot.
Figure 1-8 Replace the Power Fuse