Maintenance 10
Keysight N1911A/1912A User’s Guide 275
Operator Maintenance
This section describes how to replace the power line fuse and clean the power
meter. If you need additional information about replacing parts or repairing the
power meter, refer to the P-Series Power Meter Service Guide.
To clean the power meter, disconnect its supply power and wipe with a damp
cloth only.
The power line fuse is located within the power meter’s fuse holder assembly on
the rear panel. For all voltages the power meter uses a 250 V, F3.15 AH, 20 mm
fast blow fuse with high breaking capacity (Keysight part number 2110-0957).
Replacing the power line fuse
1 Slide the fuse holder assembly from the rear panel as shown in Figure 10-3.
2 Install the correct fuse in the “In line” position as shown in Figure 10-3. (A
spare fuse can be stored in the fuse holder assembly.)
3 Replace the fuse holder assembly in the rear panel.
The power meter also has an internal fuse. If you suspect that this fuse needs to
be replaced, it must be done by trained service personnel. Please refer to
“Returning Your Power Meter for Service” on page 281.
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