Operator Maintenance; Introduction; Fuse Replacement - Fluke 5790B Operator's Manual

Introduction

This chapter explains how to perform the routine maintenance and calibration
tasks required to keep a normally operating 5790B AC Measurement Standard in
optimal operating condition. These tasks include:
•
Replacing the fuse
•
Cleaning the air filter
•
Cleaning the external surfaces
•
Calibration
Refer to the 5790B Service Manual complete verification procedures for checking
that traceability to national standards is being maintained by the normal
calibration procedure. For intensive maintenance tasks such as troubleshooting
or repair, contact a Fluke Calibration Service Center. See How to Contact Fluke
Calibration.

Fuse Replacement

To prevent possible electrical shock, fire, or personal injury:
•
Turn the Product off and remove the mains power cord.
Stop for two minutes to let the power assemblies discharge
before you open the fuse door.
•
Replace a blown fuse with exact replacement only for
continued protection against arc flash.
•
Use only specified replacement fuses, see Table 7-1.
Access the fuse from the rear panel. The fuse rating label below the fuse holder
shows the correct replacement fuse. Note that the same fuse is used for all line
voltages. To access the fuse, refer to Figure 7-1:
1. Disconnect the mains power cord.
2. With a standard screwdriver, release the fuse holder door.
3. Pull out the fuse holder.
4. If necessary, replace the fuse.
5. Reinsert the fuse holder.
6. Close the fuse holder door.

Operator Maintenance

 Warning
Chapter 7
7-1