CEN-TECH 32418 Operating Instructions Manual

Brand: CEN-TECH

Model: 32418

Category: Multimeters

Type: Operating Instructions Manual

18 RANGE ANALOG MUL18 RANGE ANALOG MUL

18 RANGE ANALOG MUL

TITESTERTITESTER

TITESTER

OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http://www.harborfreight.com

2005 by Harbor Freight Tools

of this manual or any artwork contained herein may be reproduced in any

shape or form without the express written consent of Harbor Freight Tools.

For technical questions and replacement parts, please call 1-800-444-3353

32418

WARNING!

Electric shock can cause DEATH or SEVERE PERSONAL INJURY.

Never touch exposed conductors of electricity with

fingers, hands or any other body part.

SKU 32418 Page 2For technical questions, please call 1-800-444-3353.

Specifications

Save This Manual

You will need the manual for the safety warnings and precautions, and operating

and maintenance procedures. Keep your invoice with this manual. Write the invoice

number on the inside of the front cover. Keep the manual and invoice in a safe and dry

place for future reference.

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SKU 32418 Page 3For technical questions, please call 1-800-444-3353.

Safety Warnings and Precautions

WARNING: When using tool, basic safety precautions should always be followed to

reduce the risk of personal injury and damage to equipment.

Read all instructions before using this tester!

If all warnings and safety precautions in this manual are not followed

completely, the protection provided by this product will be reduced.

On this sheet, and in the included manual:

WARNING indicates a potentially hazardous situation which, if not avoided,

could result in death or serious personal injury.

CAUTION indicates a potentially hazardous situation which, if not avoided,

may result in a minor/moderate personal injury or damage to this tool or the unit

being tested by it.

WARNING

1. Avoid working alone. If an accident happens, an assistant can bring help.

2. Keep work area clean. Cluttered areas invite injuries.

3. Avoid electrical shock. Use extreme caution when working around uninsulated

conductors or bus bars. Prevent body contact with grounded surfaces such as

pipes, radiators, ranges, and cabinet enclosures when testing voltages.

4. Avoid damaging meter. Use only as specified in this manual.

5. Observe work area conditions. Do not test circuits in damp or wet locations.

Don’t expose to rain. Keep work area well lit.

6. Keep children away. Children must never be allowed in the work area. Do not

let them handle machines, tools, or extensions cords.

7. Store idle equipment. When not in use, tools must be stored in a dry location

to inhibit rust. Always lock up tools and keep out of reach of children.

8. Dress properly. Do not wear jewelry as an accidental brush may cause a short

circuit causing electric shock or severe burns. Protective, electrically noncon-

ductive clothes and nonskid rubber-soled footwear are recommended when

working. Wear restrictive hair covering to contain long hair.

9. Use eye protection. Always wear ANSI approved impact safety goggles.

10. Do not overreach. Keep proper footing and balance at all times. Do not reach

over or across electrical cables or frames.

11. Maintain tools with care. Ensure multimeter has a fresh battery. Inspect tool

cords periodically and, if damaged, have them repaired by an authorized techni-

cian.

12. Stay alert. Watch what you are doing, use common sense. Do not operate any

tool when you are tired.

SKU 32418 Page 4For technical questions, please call 1-800-444-3353.

13. Check for damaged parts. Before using any tool, any part that appears dam-

aged should be carefully checked to determine that it will operate properly and

perform its intended function. Check for alignment and binding of moving parts;

any broken parts or mounting fixtures; and any other condition that may affect

proper operation. In addition to a general inspection, look specifically for:

a. Pay special attention to the insulation protecting the connectors.

b. Check the leads for exposed metal, damaged insulation, and continuity.

Replace damaged test leads immediately, before use.

Any part that is damaged should be properly repaired or replaced by a qualified

technician. Do not use the tool if any switch does not operate properly.

14. Remove the test leads before performing maintenance, opening the case,

or the battery compartment.

15. Do not use the multimeter if:

a. The test leads are damaged in any way.

b. The battery is low.

c. Near any explosive gasses or fumes.

d. Any abnormal operation is detected.

(If in doubt about the condition of the meter, have it serviced.)

e. The battery cover is open.

16. This meter should be powered only by two, correctly installed 1.5V “AA”

type batteries.

17. Accessories. Only use accessories intended for use with this tool. Approved

accessories are available from Harbor Freight Tools.

18. Do not operate tool if under the influence of alcohol or drugs. Read warning

labels on prescriptions to determine if your judgment or reflexes are impaired

while taking drugs. If there is any doubt, do not operate the tool.

19. People with pacemakers should consult their physician(s) before using

this product. Electromagnetic fields in close proximity to a heart pacemaker

could cause interference to or failure of the pacemaker.

In addition, caution is necessary when near the coil, spark plug cables, or

distributor of a running engine. The engine should always be off if adjust-

ments are to be made to the distributor.

20. Do not test voltage on circuits higher than 1,000 volts. Do not test current

on DC circuits higher than .5 amps or on AC circuits at all.

Warning: The warnings, cautions, and instructions discussed in this instruction manual

cannot cover all possible conditions and situations that may occur. It must be

understood by the operator that common sense and caution are factors which

cannot be built into this product, but must be supplied by the operator.

SKU 32418 Page 5For technical questions, please call 1-800-444-3353.

Unpacking

When unpacking, make sure that the Analog Multimeter and both Test Leads

are included. If any parts are missing or broken, please call Harbor Freight Tools at

the number on the cover of this manual.

CAUTION

1. Prior to testing capacitors, resistance, diodes, or continuity; disconnect all power

to the circuit and discharge all high-voltage capacitors.

2. Check fuse before testing current.

3. Use the proper settings, terminals, techniques, and range for the tests per-

formed. Always start with the range stated in the instructions.

4. Be careful not to apply voltage to the Test Leads when the meter is in an ohms

testing position. Damage can occur to the multimeter.

NOTE:

The batteries must be

installed before first use.

See

Battery Replacement

under

Maintenance

, page 11.

SKU 32418 Page 6For technical questions, please call 1-800-444-3353.

Control and Scale Layout

Refer to this diagram while following the directions in the

Operation

section.

The bold numbers inside brackets [XX] below refer to the page number where the

explanation of the function starts.

-COM Jack + Jack

Transistor

Selection

Area [9]

DC Current

Selection

Area (mA)

[8]

Ohm

Selection

Area (Ω) [8]

AC Volt

Selection

Area [8]

Ohm Zero

Adjust [8]

DC Volt

Selection

Area [7]

Continuity

Selection

Area [9]

Battery

Selection

Area [10]

Ohm Scale

[8]

Current

Gain Scale

(hFE) [9]

Battery

Test Scale

[10]

Accuracy

Mirror [6]

Leakage

Current

(lceo) Scale

[9]

Amperage/

Voltage

Scales [7]

Continuity

Indicator [9]

The Accuracy Mirror

The Accuracy Mirror is used to insure that the meter’s pointer is being read

straight, ensuring accuracy. Simply make sure that the meter is angled so that, when

reading it, the reflection of the pointer is hidden under the pointer.

Zero Adjust

[10]

SKU 32418 Page 7For technical questions, please call 1-800-444-3353.

WARNING!

Electric shock can cause DEATH or SEVERE PERSONAL INJURY.

Always observe the following precautions when working:

1. Never touch exposed conductors of electricity with fingers, hands or any

other body part.

2. Use caution when working near voltages above 30 VAC rms, 42 VAC peak,

or 60 VDC. Voltages this high present a risk of electric shock.

3. Disconnect the circuit’s power before connecting the meter in series, when

measuring current.

4. Connect the common (COM) test lead first and disconnect it last.

5. Hold the probes with fingers behind guards.

Operation

DC Voltage Measurements

Measure DC voltages up to 1,000 V.

1. Turn the Range Selector Switch to 1000 DCV.

Always start with the highest range

if the voltage is unknown.

2. Plug the red lead into the + Jack.

Plug the black lead into the -Com

Jack.

3. Carefully touch the appropriate ex-

posed conductors with the tips of the

probes to measure the voltage (not

amperes).

4. Read measurement on the Volt/Amp

Scale - see

How to Read the Volt/

Amp Scale

table, right.

If the needle moves in the opposite

direction, then the probes are con-

nected incorrectly. Reverse the

probes’ locations.

If the voltage is less than 500 volts,

set the Range Selector Switch to the

next lower range until the meter

pointer is mid-range on the scale.

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SKU 32418 Page 8For technical questions, please call 1-800-444-3353.

5. When testing is complete, remove Test Leads and store them and the meter in a

safe, dry location.

AC Voltage Measurements

Measure AC voltages up to 1,000 V.

1. Turn the Range Selector Switch to 1000 ACV.

Always start with the highest range if the voltage is unknown.

2. Follow the directions on the previous page under

DC Voltage Measurements

(except for the polarity directions, they are unnecessary with AC).

DC Current Measurements

Measure DC conductors carrying up to 500 mA (.5 A).

1. Turn the Range Selector Switch to the 500 DCmA position. Plug the red lead

into the + Jack. Plug the black lead into the -Com Jack.

Note: Testing current should ONLY be done in series, with the circuit con-

nected and current flowing.

3. Carefully connect the test leads to the circuit or the load being tested.

4. If the Amperage is less than 25 mA (.025 A), set the Range Selector Switch to

the next lower range until the meter pointer is mid-range on the scale.

5. When testing is complete, remove Test Leads and store them and the meter in a

safe, dry location.

Resistance (Ohm) Measurements

Circuit resistance can be measured on ranges from meter reading times 1 to meter

reading times 1,000.

Note: Testing resistance should ONLY be done with the power to the circuit

disconnected. Test to make sure no voltage is present first. If voltage is

applied while testing, disconnect the tester immediately, otherwise the fuse

may blow and the tester may be damaged-see

Fuse Replacement

under

Maintenance,

page 11.

1. Turn the Range Selector Switch to the Ohm testing position (between x1

ΩΩ

Ω and

ΩΩ

Ω) you will be measuring at.

2. Plug the red lead into the + Jack. Plug the black lead into the -Com Jack.

3. Short the Test Leads together. The meter should read “0” Ohms.

4. If the meter does not read “0” Ohms, the ohmmeter needs to be calibrated to

enable accurate measurements.

a. With the test leads held together, adjust the Ohm Zero Adjust Knob until the

meter’s pointer aligns on “0”.

b. If the pointer can’t align with zero, the batteries may need to be replaced-see

Battery Replacement

under

Maintenance

, page 10.

SKU 32418 Page 9For technical questions, please call 1-800-444-3353.

5. Touch the exposed conductors with the tips of the Test Leads. If, by chance, a

voltage is present, the fuse may blow-see

Fuse Replacement

under

Mainte-

nance,

page 11. Immediately remove the Test Leads from the conductors.

6. Read the Ohm Scale. If in the x1

ΩΩ

Ω setting, the measurement is as read. If in

the x10

ΩΩ

Ω setting, multiply the reading by 10. If in the xK

ΩΩ

Ω setting, multiply the

reading by 1,000.

If the resistance measured is off the scale, move the Range Selector Switch to

a higher Ohms position.

7. Continuity Testing: Turn the Range Selector Switch to the Continuity (x1

Ω)Ω)

Ω)

setting. This test is a type of Ohms test. When the wiring between the test

leads has low resistance, the Continuity Indicator will illuminate. This is useful

for detecting breaks in wiring.

8. When testing is complete, switch the meter to a DCV testing location (to

help prolong battery life), remove the Test Leads, and store the leads and

meter in a safe, dry location.

Transistor Measurements

Caution: This tester is capable of damaging or destroying a transistor. It is entirely

the responsibility of the user to ensure that the settings are correct for the

specific transistor before connecting the meter. Harbor Freight Tools takes no

responsibility for any damage, whether direct or consequential that may be

done to the device under test due to improper use or connection.

1. Turn the Range Selector Switch to the hFE (x10

Ω)Ω)

Ω) position and set the “0”

Ohms as stated above.

2. To check the Iceo (leak) value:

a. Plug the red lead into the + Jack. Plug the black lead into the -Com Jack.

b. Carefully connect the black test lead to the emitter and the red test lead to

the collector of the transistor being tested.

c. Read the Iceo value on the Iceo scale.

3. To check the hFE value:

a. If connecting to a PNP transistor:

Plug the black lead into the -Com Jack and connect the other end of the

lead to the Emitter. Connect the hFE Connector (an optional accessory,

see page 12) to the + Jack. Carefully connect its red clip to the Collec-

tor and its black clip to the Base.

If connecting to a NPN transistor:

Plug the red lead into the + Jack and connect the other end of the lead

to the Emitter. Connect the hFE Connector (an optional accessory, see

page 12) to the -Com Jack. Carefully connect its red clip to the Collec-

tor and its black clip to the Base.

b. The meter will show the approximate hFE (IC/IB) value on the hFE scale.

SKU 32418 Page 10For technical questions, please call 1-800-444-3353.

Maintenance

1. Wipe unit with a damp cloth using a light detergent. Do not use solvents or

abrasives. Allow the unit to dry completely before use or storage.

2. Remove batteries if not in use for long periods.

4. Store unit in a dry location out of children’s reach.

5. Aside from the fuse and batteries, there are no user replaceable parts on this

unit. REPAIRS SHOULD BE DONE ONLY BY A QUALIFIED TECHNICIAN.

6. Meter Pointer Calibration

Over time, it may become necessary to adjust the meter pointer to align on “0.”

a. Remove the Test Leads from the multimeter and make sure that the unit is

not set at an Ohm testing setting.

b. Using a small standard screwdriver, place it on the small meter Zero Adjust

screw right below the center of the dial. See

Control and Scale Layout

page 6.

c. Turn screw slightly until the pointer points directly at the zero on the Amper-

age/Voltage Scale.

Figure A

Screw

4. When testing is complete, switch the meter to a DCV testing location (to

help prolong battery life), remove the Test Leads, and store the leads and

meter in a safe, dry location.

Battery Testing

1. Turn the Range Selector Switch to the 1.5V (“AAA”, “AA”, “C”, & ”D” Size Bat-

tery) setting.

2. Plug the red lead into the + Jack. Plug the black lead into the -Com Jack.

3. Connect the red test lead to the positive end of the battery and the black lead to

the negative.

4. Read measurement. When testing is complete, remove Test Leads and store

them and the meter in a safe, dry location.

7. Battery Replacement

If the Ohms cannot be adjusted to

indicate zero, the batteries require

replacement.

a. Remove the Test Leads from the

multimeter.

b. Turn the unit over to show its back.

c. Remove the screw indicated in

Figure A

using a cross-head

screwdriver.

SKU 32418 Page 11For technical questions, please call 1-800-444-3353.

d. Open the back cover.

e. Remove the batteries and replace

them, being sure to align the new

batteries properly. See

Figure B

f. Put the back cover on, bottom

edge first. See

Figure C

. Then,

retighten the screw.

Figure C

Figure B

Fuse

spare

fuse

holder

“AA” Batteries

8. Fuse Replacement

If the multimeter is exposed to excessive current, misused, or dropped, the fuse may

become blown. Check the fuse if the meter does not work for no apparent reason.

a. Follow directions

through

un-

der

Battery Replacement

remove the back cover.

b. Note the location of the spare fuse

holder and the fuse in

Figure B

Note: A spare fuse is not in-

cluded.

c. Carefully examine the fuse in the

meter. If the thin wire in the tube

is broken, the fuse is blown and

needs to be replaced. See

Fig-

ure D

Warning: ONLY replace the fuse

in this meter with another fast-

acting 0.5A fuse. Using the

wrong fuse or using another

material or object instead of a

fuse is very dangerous and

may cause a fire.

d. After replacing the fuse, close the

meter. Put the back cover on, bot-

tom edge first. See

Figure C

Then, retighten the screw.

Figure D

Fuse

SKU 32418 Page 12For technical questions, please call 1-800-444-3353.

PLEASE READ THE FOLLOWING CAREFULLY

THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE

WIRING DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER

THE MANUFACTURER OR DISTRIBUTOR MAKES ANY REPRESENTATION OR

WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO

MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED

TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER

AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS

REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED

TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK

AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL

PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS

OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.

Wiring Diagram

Aside from the fuse and batteries, there are no

user replaceable parts on this unit.

Note: The hFE connector is available as an optional accessory.

It can be ordered using part Sku 28532.

CEN-TECH 32418 Operating Instructions Manual

Brand: CEN-TECH

Model: 32418

Category: Multimeters

Type: Operating Instructions Manual

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CEN-TECH 32418 Operating Instructions Manual

CEN-TECH 32418 Operating Instructions Manual

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