Replacing The Front Terminal Amps Fuse - Keithley 2701 Service Manual

Section 3: Routine maintenance

Replacing the front terminal AMPS fuse

The front terminal AMPS fuse protects the 2701 current input from an over-current condition. Follow
the steps below to replace the AMPS fuse.
Make sure the instrument is disconnected from the power line and other equipment before
replacing the AMPS fuse.
To replace the front terminal AMPS fuse:
1. Turn off the power and disconnect the power line and test leads.
2. From the front panel, gently push in the AMPS jack with your thumb and rotate the fuse carrier
one-quarter turn counterclockwise. Release pressure on the jack and its internal spring will push
the fuse carrier out of the socket.
3. Remove the fuse and replace it with the same type: 3 A, 250 V, fast-blow, Keithley part number
FU-99-1.
Do not use a fuse with a higher current rating than specified or instrument damage may
occur. If the instrument repeatedly blows fuses, locate and correct the cause of the trouble
before replacing the fuse.
4. Install the new fuse by reversing the above procedure.
3-4
Model 2701 Ethernet-Based DMM / Data Acquisition System Service Manual
Figure 23: Front terminal AMPS fuse
2701-902-01 Rev. B / December 2018