7451A/7461A/7461P Digital Multimeter Operation Manual
8. MAINTENANCE
8-1
8. MAINTENANCE
This chapter describes the following information which relates to the maintenance of this instrument.
8.1 Replacing Fuses
8.2 Cleaning
8.3 Calibration
8.4 Replacing Parts with Limited Life
8.5 Product Disposal and Recycle
8.6 Storage
8.7 Transportation
8.8 Notes Regarding Repair, Replacement, and Periodic Calibration
8.9 System Recovery Procedure
8.10 Self-Test
8.11 Error Message List
8.1 Replacing Fuses
This instrument includes a power fuse and protection fuse. Replace them according to the following proce-
dure.
CAUTION:
1. To prevent fire and electrical shock, replace with a fuse listed in Table 8-1. Never use an incompatible fuse and
short-circuit the fuse holder.
2. Whether a fuse has blown cannot be checked by observation. Measure the resistance of the fuse and judge
whether the fuse has blown. (If the resistance is 15 or less, the fuse has not blown.)
3. Do not cut any of the internal ground wiring in this instrument or disconnect this instrument from ground. This
instrument may become unsafe to operate.
Table 8-1 Fuse Rating and Compliant Standard
Power supply
voltage
Manufacturer
Manufacturer's
product code
Compliant standard
Rated current/
voltage
Application
100 V/120 V Littelfuse, Inc. 0218.250XP IEC60127-2 sheet3 0.25 A/250 V Power fuse
220 V/240 V Littelfuse, Inc. 0218.160XP IEC60127-2 sheet3 0.16 A/250 V Power fuse
- Littelfuse, Inc. 02163.15XP IEC60127-2 sheet1 3.15 A/250 V Current terminal
protection
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