Maintenance      5
Agilent U1251A/U1252A User’s and Service Guide 113
Fuse checking procedure
It is recommended that you check the fuses of the 
multimeter before using it. Follow the instructions below to 
test the fuses inside the multimeter. Refer to Figure 5- 8 for 
the respective positions of Fuse 1 and Fuse 2.
1 Set the rotary switch to  .
2 Connect the red test lead to the input terminal  .
3 To test Fuse 1, place the tip of the test probe on the right 
half of input terminal  . Ensure that the probe tip 
touches the metal inside the input terminal, as shown in the 
figure above.