GB GCM-221 User Manual [en, es, fr]

Analog Multitester

Owners Manual Model #GMT-12A

GCM-221

Autoranging Digital Clamp Meter
Medidor de abrazadera digital

de autoreglaje
Pince ampèremétrique

• Read this owners manual
thoroughly before use
and save.

• Lea atentamente este manual
del propietario antes de
utilizar y guardar.

• Lisez ce manuel entièrement
avant utilisation et rangez-le
soigneusement.

Gardner

Bender

!

H

HOLD

OFF

A

V

Ω

A

A

VV

Ω

Ω

0 - 400
0 - 600
0 - 200

H

+

COM

600V CAT II
300V CAT III

!

!

600V

GCM-221

GCM-221 11/29/04 10:39 AM Page 1

Contents

1. Meter Functions

2. Specifications

2.1 For Your Safety

3. Operating Suggestions

3.1 Instrument Familiarization

3.2 Measuring Resistance

3.3 Testing Continuity

3.4 Measuring AC Volts

3.5 Measuring AC Amps

4. Changing The Battery

1

GCM-221 11/29/04 10:39 AM Page 2

2

!

H

HOLD

OFF

A

V

Ω

A

A

VV

Ω

Ω

0 - 400
0 - 600
0 - 200

H

+

COM

600V CAT II
300V CAT III

!

!

600V

GCM-221

1. Meter Functions

LCD display

Data hold
button

COM input
terminal

Function
select dial

Safety
protection ring

Positive input
terminal

Current
Sensing Clamp

Clamp
opening
handle

GCM-221 11/29/04 10:39 AM Page 3

3

2. Specifications

Ranges: Autoranging
AC Voltage: 600 Volts
AC Current: 600 Amps
Resistance (Ohms): 200 Ohms

Accuracy: AC voltage +/- 1.5%

AC current +/- 2.0%
Resistance +/- 1.0%

Function/Range switch: 4 functions

4 positions
Sample Rate: 2 times / sec
Operation Temperature: 32

o

F - 104oF (0oC - 40oC

)

Storage Temperature: 14

o

F - 140oF (-10oC - 60oC

)
31⁄2Digit LCD Display
Recessed Input Jacks: Negative (-) input jack for black test lead, positive

(+) input jack for red test lead.

Batteries: Two - "AAA"

Important:

Read this operators manual thoroughly before using this
meter.This manual is intended to provide basic information
regarding this meter and to describe common test
procedures which can be made with this unit. Many types of
appliance, machinery and other electrical circuit
measurements are not addressed in this manual and should
be handled by experienced service technicians.

Use extreme caution when using this
meter. Improper use of this meter can result in severe
damage to property, severe personal injury or death.
Follow all instructions and suggestions in this operators
manual as well as observing normal electrical safety
precautions. Do not use this meter if you are unfamiliar
with electrical circuits and proper test procedures.

!

WARNING

GCM-221 11/29/04 10:39 AM Page 4

4

2.1 For Your Safety

1) Use extreme caution when checking electrical circuits.

2)

Do not stand in wet or damp work areas when

working with electricity.Wear rubber-soled boots or shoes.

3) Do not apply more voltage or current than
the set range of the meter will allow.

4) Do not touch the metal probes of the test
leads when making a measurement.

5) Replace worn test leads. Do not use test leads with
broken or tattered insulation.

6) Discharge a capacitor before measuring it.

7) Remove the test leads from the circuit being measured
as soon as the test is completed.

8) Do not measure voltage when the
function/range switch is set on the resistance (ohms) range.
Never measure current when the meter is set on the
resistance range. Setting the meter on the incorrect function
may burn out some of the internal circuitry and may pose a
safety hazard.

3. Operating Suggestions

1) Set the function/range switch to the proper position before
making a measurement. When the voltage or current is not
known, it MUST be determined that the capacity of the
selected range will handle the amount of voltage or current
in the circuit (see #3 under

For Your Safety

).

2) Avoid placing the meter in areas where vibration, dust or
dirt are present. Do not store the meter in excessively hot,
humid or damp places. This meter is a sensitive measuring
device and should be treated with the same regard as other
electrical and electronic devices.

3) Using the meter in areas with high magnetic fields can
result in inaccurate readings.

4) Never immerse the meter in water or solvents. To clean
the housing use a damp cloth with a minimal amount of
mild soap.

!

WARNING

!

WARNING

!

WARNING

!

WARNING

GCM-221 11/29/04 10:39 AM Page 5

3.1 Instrument Familiarization:

Symbol Definition:

3.2

Measuring Resistance:

Switch the function selector to Ω range.
Connect red test lead to "+" terminal and black one to
the "COM" terminal.
Connect tip of the test leads to the points where the
value of the resistance is needed.
Read the result from the LCD panel.
Note: When taking measurements from a circuit,

make sure the power is off and all capacitors
are discharged.

5

GCM-221 11/29/04 10:39 AM Page 6

AC Symbol

Low Battery

Digital Reading

A
VV



Data Hold

H

Continuity

Voltage Indicator

V

Ampere Indicator

A

Ω

Ohm Indicator

!

H

HOLD

OFF

A

V

Ω

A

0 - 400
0 - 600

Ω

0 - 200

Ω

GCM-221

H

600V CAT II

!

300V CAT III

COM

+

!

600V

6

!

H

HOLD

OFF

A

V

Ω

A

A

VV

Ω

Ω

0 - 400
0 - 600
0 - 200

H

+

COM

600V CAT II
300V CAT III

!

!

600V

GCM-221



Beeper

!

H

HOLD

OFF

A

V

Ω

A

A

VV

Ω

Ω

0 - 400
0 - 600
0 - 200

H

+

COM

600V CAT II
300V CAT III

!

!

600V

GCM-221



x

x

3.3 Testing Continuity:

Switch the function selector to Ω range.
Connect red test lead to "+" terminal and black one to
the "COM" terminal.
Connect tip of the test leads to the points where tests
need to be made.
If the resistance is under 100Ω, the beeper will
sound continuously.

GCM-221 11/29/04 10:39 AM Page 7

3.4 Measuring AC Volts:

Note: Voltage measurements can only be made using the

test leads and not the clamp-around jaws.

Switch the function selector to V~range.
Connect red test lead to "+" terminal and black one to
the "COM" terminal.
Measure the voltage by touching the test lead tips to
the circuit where the value of voltage is needed.
Read the result from the LCD panel.

7

3.5 Measuring AC AMPS:

Switch the function selector to A~range.
Open the jaws by pressing the handle and insert the
cable to be measured into the jaw.
Close the clamp and note the reading on the LCD.

Note: Never clamp the Jaws around two wires as this

will cause inaccurate readings. Only clamp Jaws
around a single wire — either the HOT or
NEUTRAL WIRE.

Note: When the display is hard to read, push the hold

button to freeze the reading.

GCM-221 11/29/04 10:39 AM Page 8

!

A
VV

Ω



H

HOLD

OFF

A

V

Ω

A

0 - 400
0 - 600

Ω

0 - 200

GCM-221

H

600V CAT II

!

300V CAT III

COM

+

!

600V