Klein Tools Klein Tools CL120 Manual

ENGLISH

INSTRUCTION MANUAL

400A AC Auto-Ranging
Digital Clamp Meter

• NON-CONTACT
VOLTAGE TESTING

• AUTO-RANGING

• DATA HOLD

• RANGE HOLD

• AUDIBLE
CONTINUITY

600V

400A

20M

Ω

2m

CL120

5 Commonwealth Ave5 Commonwealth Ave5 Commonwealth Ave5 Commonwealth Ave
Woburn, MA 01801Woburn, MA 01801Woburn, MA 01801Woburn, MA 01801
Phone [phone]Phone [phone]Phone [phone]Phone [phone]
TollTollTollToll Free 1-800-517-8431Free 1-800-517-8431Free 1-800-517-8431Free 1-800-517-8431

ViVisit us at www.TestEquipmentDepot.com

CAT III
600V

ENGLISH

GENERAL SPECIFICATIONS

Klein Tools CL120 is an automatically ranging digital clamp-meter
that measures AC current via the clamp, and AC/DC voltage,
resistance and continuity via test-leads.

• Operating Altitude: 6562 ft. (2000 m)

• Relative Humidity: <95% non-condensing

• Operating Temp: 32° to 122°F (0° to 50°C)

• Storage Temp: 14° to 122°F (-10° to 50°C)

• Accuracy: Values stated at 65° to 83°F (18° to 28°C)

• Temp Coefcient: 0.1 x (Quoted Accuracy) per °C above

28°C or below 18°C, corrections are required when ambient
working temp is outside of Accuracy Temp range

• Dimensions: 8.46" x 3.54" x 1.50" (215 x 90 x 38 mm)

• Weight: 11.04 oz. (313 g) including batteries

• Calibration: Accurate for one year

• Auto Power-Off (APO): After approx. 10 minutes of inactivity

• Standards: IEC EN 61010-1, 61010-2-032, 61010-2-033.

IEC EN 61326-1, 61326-2-2.
Conforms to UL STD.61010-1,

61010-2-032,61010-2-033;
Certified to CSA STD.C22.2 NO. 61010-1,
61010-2-032,61010-2-033.

• Pollution degree: 2

• Accuracy: ± (% of reading + # of least significant digits)

• Drop Protection: 6.6 ft. (2m)

• Safety Rating: CATIII 600V, Class 2, Double insulation

• Electromagnetic Environment: IEC EN 61326-1. This

equipment meets requirements for use in basic and controlled
electromagnetic environments like residential properties,
business premises, and light-industrial locations.

Specifications subject to change.

Test Equipment Depot - 800.517.8431 - 5 Co

2

TestEquipmentDepot.com

mmonwealth Ave, Woburn, MA 01801

ELECTRICAL SPECIFICATIONS

Function Range Resolution Accuracy

200.0mV 0.1mV ±(2.5% + 10 digits)

AC Voltage

(V AC)

DC Voltage

(V DC)

Input Impedance: 10MΩ
Frequency Range: 45 to 400Hz
Maximum Input: 600V AC RMS or 600V DC

AC Current

(A AC)

Frequency Range: 50 to 60Hz

Resistance

Maximum Input: 600V AC RMS or 600V DC

2.000V 1mV

20.00V 10mV

200.0V 100mV
600V 1V

200.0mV 0.1mV ±(1.0% + 8 digits)

2.000V 1mV

20.00V 10mV

200.0V 100mV
600V 1V

2.000A 1mA ±(2.5% + 30 digits)

20.00A 10mA

400A 1A

200.0Ω 0.1Ω ±(1.2% + 5 digits)

2.000KΩ 1Ω

20.00kΩ 10Ω

200.0kΩ 100Ω

2.000MΩ 1kΩ

20.00MΩ 10kΩ ±(2.0% + 5 digits)

±(2.0% + 5 digits)

±(1.0% + 3 digits)

±(2.0% + 10 digits)200.0A 100mA

±(1.2% + 3 digits)

OTHER MEASUREMENT APPLICATIONS

Maximum Input: 600V DC or 600V AC RMS

• Continuity Check: Audible signal <10Ω, max current 1.5mA

• Sampling Frequency: Approx. 3 samples per second

• Overload: "OL" indicated on display

• Polarity: "-" on display indicates negative polarity

• Display: 3 ½ digit, 2000 Count LCD

Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn, MA 01801

TestEquipmentDepot.com

3

ENGLISH

WARNINGS

To ensure safe operation and service of the meter, follow these
instructions. Failure to observe these warnings can result in
severe injury or death.

• Before each use verify meter operation by measuring a known
voltage or current.

• Never use the meter on a circuit with voltages that exceed the
category based rating of this meter.

• Do not use the meter during electrical storms or in wet weather.

• Do not use the meter or test leads if they appear to be damaged.

• Use only with CAT III or CAT IV rated test leads.

• Ensure meter leads are fully seated, and keep fingers away
from the metal probe contacts when making measurements.

• Do not open the meter to replace batteries while the probes
are connected.

• Use caution when working with voltages above 25V AC RMS
or 60V DC. Such voltages pose a shock hazard.

• To avoid false readings that can lead to electrical shock,
replace batteries when a low battery indicator appears.

• Do not attempt to measure resistance or continuity on a live circuit.

• Always adhere to local and national safety codes. Use personal
protective equipment to prevent shock and arc blast injury
where hazardous live conductors are exposed.

SYMBOLS ON METER

AC (Alternating Current) DC (Direct Current)
Resistance (in Ohms) Audible Continuity
Double Insulated Class II Ground
Warning or Caution

V Voltage (Volts) A Amperage (Amps)

COM Common NCV Non-Contact Voltage Tester

Backlight SEL Select
Positive

+

Risk of Electrical Shock

Negative

–

SYMBOLS ON LCD

AC AC (Alternating Current) DC DC (Direct Current)

Negative Reading
Auto Ranging MAX Maximum Value Hold
Low Battery Audible Continuity

M

Mega (value x 106)

m

milli (value x 10-3)

A

Amps Ohms

NCV

Non-Contact Voltage Tester Auto Power-Off
Hazardous Voltage Indicator

Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn, MA 01801

4

TestEquipmentDepot.com

Data Hold

H

k

kilo (value x 103)

V

Volts

FEATURE DETAILS

14

3

11

13

9

10

2

12

6

7

8

1

4

5

NOTE: There are no user-serviceable parts inside meter.

2000 count LCD display8."MAX" (Maximum) button

1.

Function selector switch9.Data Hold button

2.

Clamp

3.

"COM" jack

4.

"VΩ" jack

5.

Backlight button

6.

"RANGE" button

7.

Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn, MA 01801

Clamp trigger

10.

Arrow markings

11.

NCV Button

12.

NCV Light

13.

NCV Sensing Antenna

14.

TestEquipmentDepot.com

5

ENGLISH

FUNCTION BUTTONS

ON/OFF

To power ON the meter, rotate the Function Selector switch 2 from
the OFF setting to any measurement setting. To power OFF the meter,
rotate the Function Selector switch
Power Off icon

will be visible in the display. By default, the meter

to the OFF setting. The Auto-

2

will automatically power OFF after 10 minutes of inactivity. If the meter
automatically powers-OFF while in a measurement setting, press any
button to power the meter ON, or rotate Function Selector

switch

2

to OFF, then power ON the meter. To deactivate Auto-Power OFF
functionality press and hold the "NCV" button

before powering ON

12

from the OFF setting. When Auto-Power OFF is deactivated, the Auto­Power Off icon

will not be visible in the display.

BACKLIGHT

Press Backlight button symbol

to turn ON or OFF the backlight.

6

The backlight does not automatically power OFF.

RANGE

The meter defaults to auto-ranging mode

. This mode
automatically determines the most appropriate measurement range
for the testing that is being conducted.
measure in a different range, use the

1. Press the "RANGE" button

range (
"RANGE" button

is deactivated on the LCD). Repeatedly press the

to cycle through the available ranges,

7

To manually force the meter to

"RANGE"

button7.

to manually select measurement

7

stopping once the desired range is reached.

2. To return to auto-ranging mode, press and hold the "RANGE"

button

for more than two seconds ( is reactivated).

7

MAX

When the "MAX" button

is pressed, the meter keeps track of the

8

Maximum value as the meter continues to take samples.

1. When measuring, press "MAX" button8to display the

maximum value. If a new maximum occurs, the display
updates with that new value.

2. Press "MAX" button8 again to return to normal measuring mode.

DATA HOLD

Press the Data Hold button

9

to hold the current measurement on

the display. Press again to return to live measuring mode.

NCV

Press and hold the "NCV" button 12 to enter Non-contact Voltage
Testing (NCV) mode to test for presence of AC voltage.

The NCV

icon and "EF" will be present on the display. Approach the conductor
under test leading with the sensing antenna
AC voltage, the red NCV light
(beeps) will sound.

As the NCV sensing antenna 13 approaches

13

will illuminate and audible signals

14

. In the presence of

the voltage source, the frequency of the audible sound will increase.
Release the "NCV" button to exit NCV testing mode.

NOTE: Only voltages of 40V AC or greater will be detected.

6

OPERATING INSTRUCTIONS

CONNECTING TEST LEADS

Do not test if leads are improperly seated. Results could cause
intermittent display readings. To ensure proper connection, firmly
press leads into the input jack completely.

INCORRECT

CORRECT

TESTING IN CAT III MEASUREMENT LOCATIONS

Ensure the test lead shield is pressed firmly in place. Failure to use
the CATIII / CATIV shield increases arc-flash risk.

5/32"

(4 mm)

TESTING IN CAT II MEASUREMENT LOCATIONS

CAT III / CAT IV shields may be removed for CAT II locations. This
will allow testing on recessed conductors such as standard wall
outlets. Take care not to lose the shields.

.7" (18 mm)

Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Wobur

TestEquipmentDepot.com

n, MA 01801

7

ENGLISH

OPERATING INSTRUCTIONS

AC CURRENT (LESS THAN 400A)

AC Current is measured by pressing the clamp trigger

to open

10

the clamp and placing it around a current-carrying wire. When
measuring, care should be taken to ensure that the clamp is
completely closed with trigger

fully released, and that the wire

10

passes perpendicularly through the center of the clamp in line with
the arrow markings

.

11

WIRE

To measure current:

1. Rotate the Function Selector switch

to the 200/400 A setting.

2

2. Place clamp around wire. The current measurement will be shown

in the display.

NOTE: If the measurement is less than 20A, rotate the Function
Selector switch

to the 2/20 A setting for improved resolution.

2

Disconnect test leads when measuring with the clamp.

8

OPERATING INSTRUCTIONS

AC/DC VOLTAGE (LESS THAN 600V)

1. Insert RED test lead into VΩ jack

COM jack
DC Voltage

, and rotate function selector switch 2 to the

4

or AC Voltage setting. Note "DC" or "AC"

, and BLACK test lead into

5

on the display.

Red leadBlack lead

OR

2. Apply test leads to the circuit to be tested to measure voltage.

The meter will auto-range to display the measurement in the
most appropriate range.

NOTE: If "–" appears on the LCD, the test leads are being applied to
the circuit in reverse. Swap the position of the leads to correct this.

NOTE: When in a voltage setting and the test leads are open,
readings of order mV may appear on the display. This is noise and
is normal. By touching the test leads together to close the circuit
the meter will measure zero volts.

NOTE: To access mV range for V AC

the "RANGE" button

7

must be used.

NOTE: When voltages in excess of 25V AC or 60V DC are
measured, the Hazardous Voltage Indicator

will appear on the

display.

Test Equipment Depot - 800.517.8431 - 5 Commo

TestEquipmentDepot.com

nwealth Ave, Woburn, MA 01801

9

ENGLISH

OPERATING INSTRUCTIONS

RESISTANCE MEASUREMENTS

1. Insert RED test lead into VΩ jack 5, and BLACK test lead into COM

, and rotate function selector switch 2 to the Resistance

jack

4

setting. The resistance symbol will appear on the display.

2. Remove power from circuit.

3. Measure resistance by connecting test leads to circuit. The

meter will auto-range to display the measurement in the most
appropriate range.

Red leadBlack lead

NOTE: When in a Resistance setting and the test leads are open
(not connected across a resistor), or when a failed resistor is under
test, the display will indicate O.L. This is normal.

DO NOT attempt to measure resistance on a live circuit.

CONTINUITY

1. Insert RED test lead into VΩ jack 5 and BLACK test lead into COM

jack

, and rotate function selector switch 2 to the Continuity

4

setting.

2. Remove power from circuit.

3. Test for continuity by connecting conductor or circuit with test

leads. If resistance is measured less than 10Ω, an audible signal
will sound and display will show a resistance value indicating
continuity. If circuit is open, display will show "OL".

Red leadBlack lead

DO NOT attempt to measure continuity on a live circuit.

10

MAINTENANCE

BATTERY REPLACEMENT

When indicator is displayed on LCD, batteries must be replaced.

1. Loosen captive screw and remove battery cover.

2. Replace 3 x AAA batteries (note proper polarity).

3. Replace battery cover and fasten screw securely.

T

o avoid risk of electric shock, disconnect leads from any voltage

source before removing battery door.

To avoid risk of electric shock, do not operate meter while

battery door is removed.

Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn, MA 01801

TestEquipmentDepot.com

11

ENGLISH

CLEANING

Be sure meter is turned off and wipe with a clean, dry lint-free
cloth.

Do not use abrasive cleaners or solvents.

STORAGE

Remove the batteries when meter is not in use for a prolonged
period of time. Do not expose to high temperatures or
humidity. After a period of storage in extreme conditions
exceeding the limits mentioned in the General Specifications
section, allow the meter to return to normal operating
conditions before using.

Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn, MA 01801

TestEquipmentDepot.com