Input Fuse Replacement - Keithley DMM7510 Reference Manual

Appendix 0: Maintenance
5. Use the screwdriver to lift the tab from the fuse drawer.
6. Slide the fuse drawer out. The fuse drawer does not pull completely out of the power module.
7. Snap the fuse out of the drawer.
8. Replace the fuse.
9. Push the fuse drawer back into the module.
If the fuse continues to become damaged, a circuit malfunction exists and must be corrected. Return
the instrument to Keithley Instruments for repair.

Input fuse replacement

The input line from the AMPS connectors on the front and rear panels is protected by two fuses on
the rear panel.
Make sure the instrument is disconnected from the power line and other equipment before
checking or replacing a current-input fuse. Failure to disconnect all power may expose you
to hazardous voltages, that, if contacted, could cause personal injury or death. Use
appropriate safety precautions when working with hazardous voltages.
For continued protection against fire or instrument damage, only replace fuse with the type and
rating listed. If the instrument repeatedly damages fuses, locate and correct the cause of the problem
before replacing the fuse.
To replace a current-input fuse:
1. Turn off the power to the instrument.
2. Disconnect the power line and test leads.
3. From the rear panel, gently push in the AMPS fuse holder and rotate it one-quarter turn counter-
clockwise.
4. Remove the fuse, and replace it with the same type (see table below).
5. Install the new fuse by reversing the procedure above.
Manufacturer and part
number
DMM7510-FUSE-3A
DMM7510-FUSE-10A
If the fuse continues to become damaged, a circuit malfunction exists and must be corrected. Return
the instrument to Keithley Instruments for repair.
2
Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
Rating
3.5 A, 1000 VAC/VDC fast blow
11 A, 1000 VAC/VDC fast blow
Length
10 mm x 38 mm (0.394" x 1.5")
10.3 mm x 38 mm (0.406" x 1.5")
DMM7510-901-01 Rev. B / May 2015