Klein Tools CL900 Instruction Manual

INSTRUCTION MANUAL

ENGLISH

FRANÇAIS pg. 33

ESPAÑOL pg. 17

2000A
Digital Clamp Meter

1000V

2000A

Ω

True RMS

Measurement
Technology

• NON-CONTACT
VOLTAGE TESTING

• INRUSH CURRENT

• LOW IMPEDANCE

• DATA HOLD

• RANGE HOLD

• AUDIBLE
CONTINUITY

• DIODE TEST

• CAPACITANCE

• FREQUENCY

CL900

2

GENERAL SPECIFICATIONS

Klein Tools CL900 is an auto-ranging, true root mean square (TRMS)
digital clamp meter that measures AC/DC current via the clamp and
measures AC/DC voltage, resistance, continuity, frequency, duty­cycle, capacitance, and tests diodes via test-leads. It features a Low
Impedance (LoZ) mode for identifying and eliminating ghost or stray
voltages, and has a dedicated mode for capturing Inrush Current.

• Operating Altitude: 6562 ft. (2000m)

• Relative Humidity: <80% non-condensing

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

• Storage Temperature: 14° to 140°F (-10° to 60°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: 10.4" x 3.9" x 1.7" (265 x 99 x 43 mm)

• Weight: 18.6 oz. (526 g) including batteries

• Calibration: Accurate for one year

• Standards: Conforms to UL STD 61010-1, 61010-2-032,

61010-2-033.

Certified to CSA STD C22.2 # 61010-1,
61010-2-032, 61010-2-033.

IEC EN 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: CAT IV 600V, CAT III 1000V, Class 2,

Double insulation

CAT III: Measurement category III is applicable to test and
measuring circuits connected to the distribution part of the
building’s low-voltage MAINS installation.

CAT IV: Measurement category IV is applicable to test and
measuring circuits connected at the source of the building’s
low-voltage MAINS installation.

• 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.

ENGLISH

3

ELECTRICAL SPECIFICATIONS

Function Range Resolution Accuracy (50/60 Hz)

AC Voltage

(V AC)

600.0mV 0.1mV ±(1.0% + 8 digits)*

6.000V 1mV ±(1.0% + 5 digits)

60.00V 10mV
±(1.2% + 5 digits)

600.0V 0.1V

1000V 1V ±(1.5% + 5 digits)

DC Voltage

(V DC)

600.0mV 0.1mV ±(0.9% + 8 digits)

6.000V 1mV
±(1.0% + 3 digits)60.00V 10mV

600.0V 0.1V

1000V 1V ±(1.2% + 3 digits)

Input Impedance:

10MΩ

Frequency Range:

50 to 400Hz

Maximum Input: 1000V AC RMS or 1000V DC
*Accuracy specified from 5% to 100% of the measuring range

AC Current

(A) TRMS

600.0A 0.1A ±(2.0% + 5 digits)

2000A 1A ±(2.5% + 8 digits)

DC Current (A)

600.0A 0.1A ±(2.0% + 5 digits)

2000A 1A ±(2.5% + 8 digits)

AC Frequency Range: 50 to 60Hz , >500mA
DC:

>200mA (low current requires use of DC ZERO function)

AC Current (A)

Inrush

600A 0.1A ±(2.5% + 5 digits)**

2000A 1A ±(3.0% + 8 digits)**

AC Frequency Range: 50 to 60Hz
when auto-ranging >3A detectable
(>2A if held in 600A range)

**Accuracy specified assumes AC sine wave

Resistance

600.0Ω 0.1Ω

±(1.5% + 5 digits)

6.000KΩ 1Ω

60.00kΩ 10Ω

600.0kΩ 100Ω

6.000MΩ 1kΩ

60.00MΩ 10kΩ ±(2.0% + 10 digits)

Maximum Input: 600V AC RMS or 600V DC

Capacitance

60.00nF 10pF ±(5.0% + 35 digits)

600.0nF 0.1nF

±(3.0% + 5 digits)

6.000µF 1nF

60.00µF 10nF

600.0µF 0.1µF
6000µF 1µF ±(5.0% + 5 digits)

Maximum Input: 600V AC RMS or 600V DC

4

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.

• 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.

• Do not hold meter above hand & finger guard during use.

ELECTRICAL SPECIFICATIONS

Frequency

9.999Hz 0.001Hz

±(1.0% + 5 digits)

99.99Hz 0.01Hz

999.9Hz 0.1Hz

9.999kHz 1Hz

99.99kHz 10Hz

500.0kHz 100Hz

Sensitivity: >8V RMS, Maximum Input: 600V DC or 600V AC RMS

Duty Cycle

0.1% – 99.9% 0.10%

±(1.2% + 2 digits)

Pulse width: 0.1ms – 100ms
Frequency width: 5Hz to 10kHz
Sensitivity: >8V RMS
Maximum Input: 600V AC RMS or 600V DC

OTHER MEASUREMENT APPLICATIONS

• Diode Test: Max. 1.5mA, open circuit voltage ~ 3.0V DC

• Continuity Check: Audible signal <50Ω, test current <0.35mA

• Sampling Frequency: 3 samples per second

• Low Impedence (Low Z): Input impedence: >3kΩ

Max input: 600V RMS

• Auto Power off: After ~30 minutes of inactivity

• Overload:

"OL" indicated on display, overload protection

1000V RMS in Voltage setting, 600V RMS in all other settings

• Polarity: "-" on display indicates negative polarity

• Non-Contact Voltage Detection:

>90V AC

• Display: 3-5/6 digit, 6000 Count LCD

5

SYMBOLS ON METER

Alternating Current (AC) Direct Current (DC)

A

Amperage

V

Voltage

Audible Continuity

Hz

Frequency

Diode Test

%

Duty-Cycle
Capacitance Low Impedance
Resistance (Ohms) DC Current Zero Function

+ Positive – Negative

COM

Common Ground
Double Insulated Class II

Warning or Caution:

To ensure safe operation and service of this

meter, follow all warnings and instructions detailed in this manual.

Risk of Electrical Shock:

I

mproper use of this meter can lead to risk of

electrical shock. Follow all warnings and instructions detailed in this manual.

SYMBOLS ON LCD

AC Measurement DC Measurement
Negative Reading Data Hold

AUTO

Auto Ranging

MAX

Maximum Value Hold

MIN

Minimum Value Hold Low Battery
Auto Power Off Audible Continuity
Diode Test Inrush Current

k

kilo (value x 103)

m

mili (value x 10-3)

M

Mega (value x 106)

n

nano (value x 10-9)

μ

micro (value x 10-6)

F

Farads
Ohms

A

Amps

V

Volts

LoZ

Low Impedence

Hz

Frequency (Hertz)

%

Duty Cycle

WARNINGS

• 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.

• Usage of this meter in any way other than that specified by the
manufacturer can impair safe operation, resulting in severe injury or death.

• To 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.

6

ENGLISH

FEATURE DETAILS

1

9
7

2

3

11

10

13

14

15

16

54

8

6

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

12

1.

6000 count
LCD display

2.

Function
selector
switch

3.

Clamp

4.

"COM" jack

5.

"VΩ" jack

6.

Data Hold /
Backlight
button

7.

"RANGE"
button

8.

"MAX/MIN"
button

9.

SEL (select) /

DC Zero button

10.

INRUSH button

11.

Clamp trigger
(press to open
clamp)

12.

Arrow markings

13.

N

on-contact
Voltage Testing
Button

14.

N

on-contact
Voltage Testing
Sensor

15.

N

on-contact
Voltage Testing
LED Indicator

16.

Polarity markings
(for DC current)

7

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 2 to the OFF setting. By default,
the meter will automatically power OFF after aprox. 30 minutes of
inactivity. To deactivate the auto power OFF functionality, press and
hold the "SEL/DC ZERO" button 9 before powering ON from the OFF
setting. When auto power OFF is deactivated, the Auto Power Off icon

will not be visible in the display.

SEL (SELECT) / DC ZERO BUTTON (FOR SECONDARY FUNCTIONS)

The SEL/DC ZERO button 9 activates the secondary function for
each application accessible by the function selector switch

2

:

• In Current

A

and Low Impedance modes, it toggles between

AC and DC measurements.

• In Frequency/Duty Cycle

setting, it toggles between these

measurements

.

• In Continuity/Resistance/Diode-Test

setting, it toggles

through these measurements in order

.

• In DC current setting, pressing and holding for more than one

second initiates the DC ZERO function. Subsequent DC current
measurements automatically subtract the measurement that was
present as an offset correction.

The default function for each application is printed on the meter in
white, the secondary functions in orange. An icon on the LCD display
will indicate which function is active.

DATA HOLD

Press the Data Hold / Backlight button 6 to hold the measurement
on the display. Press again to release the display to return to live
measuring.

BACKLIGHT

Press and hold the Data Hold / Backlight button

6

for more than
one second to turn ON the backlight. The backlight will automatically
power OFF after 3 minutes of inactivity.

RANGE

The meter defaults to auto-ranging mode

AUTO

. This mode
automatically determines the most appropriate measurement range
for the testing that is being conducted. To manually force the meter to
measure in a different range, use the Range button 7.

1. Press the "RANGE" button 7 to manually select measurement

range (AUTO is deactivated on the LCD). Repeatedly press the
"RANGE" button 7 to cycle through the available ranges, stopping
once the desired range is reached.

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

button 7 for more than one second (AUTO is reactivated).

8

ENGLISH

FUNCTION BUTTONS

MAX/MIN

When the "MAX/MIN" button 8 is pressed, the meter keeps track of
the Maximum and Minimum values as the meter continues to take
samples.

1. When measuring, press "MAX/MIN" button 8 to toggle between

the Maximum value (MAX) and Minimum value (MIN). If a new
Maximum or Minimum, the display will update with the new value.

2. Press "MAX/MIN" button 8 for more than one second to return to

normal measuring mode.

INRUSH CURRENT

Rotate the Function Selector switch 2 to the Current A

setting

and

press INRUSH 10 prior to an inrush event to test for inrush

current. While the meter monitors current waiting for the inrush
event, "----" will be visible on the display.

NON-CONTACT VOLTAGE TESTING

Press and hold the "NCV" button

13

to test for AC voltage using the
integrated non-contact voltage tester. Approach the conductor under
test leading with the sensing antenna

14

. The meter delivers visual

warning signals via the LED indicator

15

and audible signals (beeps)
when AC voltage is detected. Release the "NCV" button to exit NCV
testing mode.

NOTE: It is not recommended to perform continuity and NCV testing
simultaneously, as both tests utilize the same audible signal, making
it difficult to resolve which test is responsible for the audible alarm.

NOTE: Only voltages of 90V AC or greater will be detected.

9

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 / CAT IV MEASUREMENT LOCATIONS

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

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.

5/32"

(4 mm)

.7" (18 mm)

10

OPERATING INSTRUCTIONS

AC/DC CURRENT (LESS THAN 2000A)

AC Current is measured by pressing the clamp
trigger 11 to open the clamp 3 and placing
it around a current-carrying wire. When
measuring, care should be taken to ensure
that the clamp 3 is completely closed with
trigger 11 fully released, and that the wire
passes perpendicularly through the center of
the clamp 3 in line with the arrow markings

12

.

To measure current:

1. Rotate the Function Selector switch 2 to the

Current A

setting

.

2. The meter defaults to AC measurement.

To measure DC, press the

"SEL/DC ZERO" button 9 to toggle between AC and DC modes.
The AC or DC icon on the LCD indicates
which mode is selected. Note "AC" or "DC"
on the display.

3. Place the clamp

3

around the wire.
When measuring DC current, align the
polarity markings

16 on the clamp with
the polarity of the wire to avoid negative
readings. The current measurement will be shown in the display.
The meter will auto-range to display the measurement in the
most appropriate range.

To measure inrush current:

1. Rotate the Function Selector switch 2 to the Current

A

setting.
Place the clamp 3 around the wire and press "INRUSH" 10. The
Display 1 will show "----". Initiate the Inrush event and the inrush
current will be captured and presented in the display. A second press of
"INRUSH" 10 will reset the Inrush measurement, "----" will be presented
on the display and the meter will wait for the next Inrush event.

2. P

ress and hold

"INRUSH"

10 for more than one second to return to

normal measuring mode.

Disconnect test leads when measuring with the clamp.

NOTE: If non-zero values are displayed prior to measuring in DC

current mode, an offset correction may be required to improve
accuracy. With meter in DC current mode, press and hold the
"SEL/DC ZERO" button

9

for more than one second to initiate the
DC current ZERO function. Subsequent DC current measurements
automatically subtract the measurement that was initially present as
an offset correction.

ENGLISH

WIRE

11

OPERATING INSTRUCTIONS

AC/DC VOLTAGE (LESS THAN 1000V)

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

COM jack 4, and rotate function selector switch 2 to the
AC voltage V or DC voltage V setting. The AC or DC icon on
the LCD indicates which setting is selected.

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.

Do not attempt to measure voltages greater than 1000V

in any Voltage setting.

AC/DC LoZ VOLTAGE (LESS THAN 600V)

1. Insert RED test lead into VΩ jack

5

, and BLACK test lead into

COM jack

4

, and rotate function selector switch 2 to the

AC/DC LoZ voltage setting.

The meter defaults to AC

measurement.

To measure DC, press the "SEL/DC ZERO" button

9

to toggle between AC and DC modes. The AC or DC icon on

the LCD indicates which mode is selected. Note "AC" or "DC" on
the display.

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.

Do not attempt to measure voltages greater than 600V

in LoZ setting.

Black lead Red lead

Black lead Red lead

-or-

12

ENGLISH

RESISTANCE MEASUREMENTS

1. Insert RED test lead into VΩ jack

5

, and BLACK test lead into

COM jack

4

, and rotate function selector switch 2 to the

Continuity/Resistance/Diode-Test

setting.

NOTE: The meter defaults to Continuity testing in this mode. Press
the SEL/DC ZERO" button

9

once to enter Resistance testing

mode. The Resistance icon

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.

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

4

, and rotate function selector switch 2 to the

Continuity/Resistance/Diode-Test

setting.

NOTE: The meter defaults to Continuity testing in this setting.
Ensure that the Continuity Testing icon

is visible on the display.

If not, press the "SEL/DC ZERO" button

9

repeatedly until the

icon is shown.

2. Remove power from circuit.

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

leads. If resistance is measured less than 50Ω, an audible signal
will sound and display will show a resistance value indicating

continuity. If circuit is open, display will show "OL".

DO NOT attempt to measure continuity on a live circuit.

OPERATING INSTRUCTIONS

Black lead Red lead

Black lead Red lead

13

DIODE TEST

1. Insert RED test lead into VΩ jack

5

, and BLACK test lead into

COM jack

4

, and rotate function selector switch 2 to the

Continuity/Resistance/Diode-Test

setting.

NOTE: The meter defaults to Continuity testing in this mode. Press
the SEL/DC ZERO" button

9

twice to enter Diode testing mode. The

Diode icon will appear on the display.

2. Touch test leads to diode. A reading of 200-800mV on display

indicates forward bias, "OL" indicates reverse bias. An open
device will show "OL" in both polarities. A shorted device will
show approximately 0mV.

FREQUENCY / DUTY-CYCLE

1. Insert RED test lead into VΩ jack

5

and BLACK test lead into

COM jack

4

, and rotate function selector switch 2 to the

Frequency/Duty-Cycle setting.

OPERATING INSTRUCTIONS

NOTE: : The meter defaults to Frequency testing. To test Duty-Cycle,

press the "SEL/DC ZERO" button

9

once. Ensure that the appropriate

icon (either Hz or %) appears on the display.

1. Measure by connecting test leads across the circuit.

Black lead Red lead

Black lead Red lead

14

OPERATING INSTRUCTIONS

CAPACITANCE

1. Insert RED test lead into VΩ jack

5

, and BLACK test lead into

COM jack

4

, and rotate function selector switch 2 to the

Capacitance

setting.

2. Remove power from circuit.

3. Measure capacitance by connecting test leads across the capacitor.

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

ENGLISH

MAINTENANCE

BATTERY REPLACEMENT

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

1. Loosen screw on battery door.

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

3. Replace battery door and fasten securely with screw.

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.

Black lead Red lead

15

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.

WARRANTY

www.kleintools.com/warranty

DISPOSAL / RECYCLE

Do not place equipment and its accessories in the trash.
Items must be properly disposed of in accordance with local
regulations. Please see www.epa.gov or www.erecycle.org
for additional information.

CUSTOMER SERVICE

KLEIN TOOLS, INC.

450 Bond Street

Lincolnshire, IL 60069

1-877-775-5346

[e-mail]

www.kleintools.com