Model DMM7512 7½ Digit Sampling Multimeter Instrument Information
10
071357601 / October 2018
Line fuse replacement
A fuse on the DMM7512 rear panel protects the power line input of the instrument.
Disconnect the line cord at the rear panel and remove all test leads connected to the
instrument before replacing a line fuse. Failure to do so could expose the operator to
hazardous voltages that could result in personal injury or death.
The fuse drawer is above the AC receptacle on the rear panel of the DMM7512, as shown in the following
figure.
Figure 8: Fuse replacement
To prevent injury, death, or instrument damage, use only the correct fuse type (see table).
To replace the line fuse:
1. Power off the instrument and remove the line cord.
2. There is a small tab at the bottom of the fuse drawer. Using a small screwdriver, pry this tab from the AC
receptacle.
3. Slide the fuse drawer out to access to the fuse.
4. Snap the fuse out of the drawer and replace it with the same type, as specified in the table below.
5. Push the fuse drawer back into the module.
If a fuse continues to become damaged, a circuit malfunction exists and must be corrected. Return the
instrument to Keithley Instruments for repair.
Line fuse
Line voltage
Rating
Keithley part number
100 V to 240 V
250 V, 3.15 A, Slow Blow 5 x 20 mm
FU-106-3.15
