Current Fuse Replacement; Front Amps Input Fuse; Routine Maintenance; Table 1-2 Power Line Fuse - Keithley 2002 Repair Manual

Routine Maintenance

OR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
OR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
LINE RATING
90-134VAC
180-250VAC
50, 60, 400HZ
55VA MAX
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
DIGITAL I/O
IN OUT
TRIGGER
LINK
AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Figure 1-1
Line fuse location
1.3

Current fuse replacement

Each AMPS input (front and rear) has its own current fuse.
When replacing a current fuse, use the type specified in Table
1-2.
Table 1-2
Power line fuse
Size Rating
5 × 20mm 250V, 2A, Slo-Blo
WARNING
Disconnect the instrument from the
power line and remove all test leads
(front and rear) before replacing the
AMPS fuses.
1-2
LINE FUSE
Line
SLOWBLOW
1/2A, 250V
Fuse
IEEE-488
Keithley Part No.
FU-48

1.3.1 Front AMPS input fuse

The front panel AMPS jack functions as the AMPS input ter-
minal and as the carrier for the AMPS fuse (see Figure 1-2).
Perform the following steps to replace the fuse:
1. Push in the AMPS input jack and turn counter-clockwise
until the spring-loaded fuse carrier releases from the
fuse holder.
2. Pull out the fuse carrier and replace the fuse with the
type specified in Table 1-2.
CAUTION
To prevent instrument damage, use only
the type specified in Table 1-2.
3. Re-install the fuse carrier.
MATH 4W AUTO ARM TRIG SMPL
2001 MULTIMETER
RANGE
AUTO
RANGE
Figure 1-2
Front AMPS input fuse location
SENSE
INPUT
Ω 4 WIRE
HI
350V 1100V
!
PEAK PEAK
LO
500V
PEAK
INPUTS
F R
FRONT/REAR
2A 250V
AMPS
CAL
AMPS
Fuse