Chapter 6. Maintenance - Aktakom AM-1108 User Manual

Digital multimeter

Table of Contents

Introduction

This section provides some basic maintenance procedures. Repair, calibration, and servicing not covered in this manual must

be performed by qualified personnel. For maintenance procedures not described in this manual, contact a Service Center.

General Maintenance



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



Take off the battery if you will not use the meter for a long time.



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.

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

Testing the Fuses

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.

To check the fuse, proceed as follows:

1. Set the rotary switch on

2. Insert the black lead to COM jack and red lead to mA jack.

3. Using an ohmmeter, check the resistance between the meter tested leads .If the resistance is about 1Ω, the fuse is good.

An open reading means that fuse F1 is blown.

4. Set the rotary switch on .

5. Insert the black lead to COM jack and red lead to A jack.

6. Using an ohmmeter, check the resistance between the meter tested leads .If the resistance is about 0.01Ω, the fuse is

good. An open reading means that fuse F2 is blown

Replacing the Fuses

To avoid electrical shock or damage to the meter, only use replacement fuses specified in Table 6-1.

Referring to Figure 6-1, replace the meter's fuses as follows:

1. Turn the rotary switch to OFF and remove the test leads from the terminals.

2. Take off protector of the meter. Then remove the battery access door by using a standard-blade screwdriver to turn the

battery door screws one-quarter turn counterclockwise.

3. Remove either fuses by gently prying one end loose, then sliding the fuse out of its bracket.

4. Install ONLY specified replacement fuses with the amperage, voltage, and speed ratings.

5. Reinstall the battery door. Secure the door by turning the screws one-quarter turn clockwise.

6. Reinstall the meter's protector.

Replacing the Batteries

The meter needs four AAA alkaline batteries.

To avoid electrical shock:

 Remove test leads from the meter before opening the battery door.

 Close and latch the battery door before using the meter.

 The new and old Batteries can not be mixed

 Take out the batteries if the meter won't be used for a long time

 Despise the old batteries in accordance with the local law.

Replace the batteries as follows. Refer to Figure 6-1

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