Fluke 189 user manual Introduction General Maintenance, Testing the Fuses

Introduction

This chapter describes basic operator maintenance. For calibration and performance test information, order the 187 & 189 Service Manual, PN 1584337.

General Maintenance

Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.

Dirt or moisture in the terminals can affect readings and can falsely activate the Input Alert feature. Clean the terminals as follows:

1.Turn the meter off and remove all test leads.

2.Shake out any dirt that may be in the terminals.

Chapter 6

Maintenance

3.Soak a new swab with alcohol. Work the swab around in each terminal.

Testing the Fuses

Before measuring current, test the appropriate fuse as shown in Figure 6-1. If the tests give readings other than those shown, have the meter serviced.

WWarning

To avoid electrical shock or personal injury, remove the test leads and any input signals before replacing the battery or fuses. To prevent damage or injury, install ONLY specified replacement fuses with the amperage, voltage, and speed ratings shown in Chapter 7.

6-1