Introduction; Replacing The Line Fuse - Fluke 5820A Operator's Manual

7-1. Introduction

This chapter explains how to perform the routine maintenance to keep a normally
operating 5820A Calibrator in service. These tasks include:
•
Replacing the fuse
•
Cleaning the air filter
•
Cleaning the external surfaces
Refer to the Service manual for intensive maintenance tasks such as calibration or repair,
and all procedures that require opening the cover of the instrument. The Service Manual
also contains complete verification procedures for checking that traceability to national
standards maintained by the normal calibration procedure.

7-2. Replacing the Line Fuse

The line power fuse is accessible on the rear panel. The fuse rating label above the ac
power input module shows the correct replacement fuse for each line voltage setting.
Table 7-1 lists the fuse part numbers for each line voltage setting.
To check or replace the fuse, refer to Figure 7-1 and proceed as follows:
1. Disconnect line power.
2. The line power fuse and line voltage switch are located in a compartment on the right
end of the ac input module. To open the compartment and remove the fuse, insert the
blade of a standard screwdriver to the left of the tab located at the left side of the
compartment cover.
3. Pry the tab out of the slot and the compartment cover will pop part way out.
4. Remove the compartment cover with your fingers.
5. The fuse comes out with the compartment cover and can be easily replaced.
6. To reinstall the fuse, push the compartment cover back into the compartment until the
tab locks with the ac input module.
Part Number
W109181
W109272
Table 7-1. Replacement Fuses
Fuse Description
2A/250V SB (Time Delay)
1A/250V SB (Time Delay)
Maintenance

Introduction

Line Voltage Setting
100 V or 120 V
200 V or 240 V
7
7-3