Klein Tools CL450 User manual

INSTRUCTION MANUAL

ENGLISH

FRANÇAIS pg. 37

ESPAÑOL pg. 19

HVAC Clamp Meter

1000V

600A

60M

True RMS

Measurement

Technology

• MICROAMPS DC

• DIFFERENTIAL

TEMPERATURE

• DIGITAL

TEMPERATURE

CALIBRATION

• INRUSH CURRENT

• LOW IMPEDANCE

CL450

GENERAL SPECIFICATIONS

The Klein Tools CL450 is an automatically ranging true root mean

square (TRMS) digital clamp meter that measures AC current

and Inrush current via the clamp, AC/DC voltage, Microamps DC,

resistance, continuity, frequency, capacitance, and test diodes via test

leads, and differential temperature via K-Type thermocouple probes.

• Environment: Indoor and oudoor

• Operating Altitude: 6562 ft. (2000m)

• Relative Humidity: <80% 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

• Batteries: 3 x 1.5V AAA

• Dimensions: 10.04" x 3.77" x 1.59" (255 x 96 x 40 mm)

• Weight: 13.6 oz. (386 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 No. 61010-1,

61010-2-032, 61010-2-033.

IEC/EN 61010-1, 61010-2-032,

61010-2-033, 61326-1.

• Pollution degree: 2

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

• Drop Protection: 6.6 ft. (2m)

• Safety Rating: CAT IV 600V, Double insulation

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

ELECTRICAL SPECIFICATIONS

Function Range Resolution Accuracy (50/60 Hz)

AC Voltage

(V AC)

6.000V 1mV ±(1.5% + 5 digits)

60.00V 10mV ±(1.2% + 5 digits)

600.0V 100mV

1000V 1V ±(1.7% + 5 digits)

DC Voltage

(V DC)

600mV 0.1mV ±(1.0% + 8 digits)

6.000V 1mV

±(0.8% + 3 digits)60.00V 10mV

600.0V 100mV

1000V 1V ±(1.2% + 3 digits)

AC + DC

Voltage

(V)

6.000V 1mV

±(2% + 6 digits)

60.00V 10mV

600.0V 100mV

1000V 1V

Input Impedance: ≥

10MΩ

Frequency Range:

45 to 400Hz (AC only)

Maximum Input: 1000V AC RMS or 1000V DC

AC Current

(A AC)

60.00A 10mA ±(2.5% + 10 digits)

600.0A 100mA ±(2.0% + 10 digits)

AC Current (A)

Inrush

60.00A 10mA ±(10.0% + 10 digits)

600.0A 100mA

DC Current (µA) 200µA 1µA ±(0.9% + 6 digits)

Frequency Range: 50 to 60Hz (AC only)

Resistance

600.0Ω 0.1Ω ±(1.2% + 5 digits)

6.000KΩ 1Ω

±(1.2% + 3 digits)

60.00kΩ 10Ω

600.0kΩ 100Ω

6.000MΩ 1kΩ

60.00MΩ 10kΩ ±(2.0% + 5 digits)

Maximum Input: 600V AC RMS or 600V DC

Capacitance

60.00nF 0.010nF ±(4.0% + 25 digits)

600.0nF 0.1nF

±(4.0% + 8 digits)

6.000µF 0.001µF

60.00µF 0.01µF

600.0µF 0.1µF

6000µF 1µF ±(10.0% + 9 digits)

Maximum Input: 600V AC RMS or 600V DC

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 IV rated test leads.

• Ensure meter leads are fully seated, and keep fingers away from the

metal probe contacts when making measurements.

ELECTRICAL SPECIFICATIONS

Function Range Resolution Accuracy

Temperature

(Fahrenheit)

-40°to 32°F

0.1

°F

±(2.0% + 6

°F

)

33° to 932°F

±(1.0% + 2

°F

)

933° to 1832°F

°F

±(1.5% + 6

°F

)

Temperature

(Celsius)

-40° to 0°C

0.1

°C

±(2.0% + 3

°C

)

1° to 500°C

±(1.0% + 1

°C

)

501° to 1000°C

°C

±(1.5% + 3

°C

)

FREQUENCY (AUTO-RANGING)

99.99Hz 0.01Hz

±(1.0% + 5 digits)

999.9Hz 0.1Hz

9.999kHz 1Hz

99.99kHz 10Hz

999.9kHz 100Hz

Measurement Range: 10Hz – 1MHz

≤100kHz – 250mV rms ≤Input amplitude ≤20V rms

>100kHz – 1MHz: 600mV rms ≤Input amplitude ≤20V rms

DUTY CYCLE

0.1% to 99.9%

0.1% Reference only

Frequency width: ≤100kHz

OTHER MEASUREMENT APPLICATIONS

• Diode Test: Max. 1.0mA, open circuit voltage ~ 2.5V DC

• Continuity Check: Test current 0.5mA

• Low Impedance (Low Z): Input impedance: >3kΩ

Max input: 1000V RMS

• Auto Power off: After ~10 minutes of inactivity

• Overload:

"OL" indicated on display, overload protection

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

• Polarity: "-" on display indicates negative polarity

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

SYMBOLS ON METER

Alternating Current (AC) Direct Current (DC)

AAmperage VVoltage

µA Micro Amps

Frequency

Degrees Fahrenheit

Degrees Celsius

Audible Continuity

Duty-Cycle

Diode Test Low Impedance

Capacitance Resistance (Ohms)

+ 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:

mproper use of this meter can lead to risk of

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

Risk of Electrical Shock:

Application around and removal from

UNINSULATED HAZARDOUS LIVE conductors is permitted.

SYMBOLS ON LCD

AC AC Measurement DC DC Measurement

Negative Reading Data Hold

Auto Ranging MAX Maximum Value Hold

MIN Minimum Value Hold Low Battery

Auto Power Off Audible Continuity

Diode Test High Voltage

kilo (value x 10

)

mili (value x 10

-3

)

Mega (value x 10

)

nano (value x 10

-9

)

micro (value x 10

-6

)

Volts

Ohms

Farads

Amps Relative Mode

LoZ

Low Impedance

Duty Cycle

Frequency (Hertz)

Degrees (Celsius)

Degrees (Fahrenheit) INRUSH Inrush Current

LPF

Low-Pass Filter

T1 Temperature

T2 Temperature T-CAL Temperature Calibration

T1-T2

Differential Temperature AVG Average

AC+DC AC Voltage + DC Voltage

WARNINGS

• 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.

• Do not attempt to measure voltages greater than 600V in LoZ setting.

• 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.

ENGLISH

FEATURE DETAILS

NOTE: There are no user-serviceable

parts inside meter.

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

SEL (select)

button

10.

V+A /

Inrush Current

button

11. Relative /

Low-Pass Filter

button

12.

Temperature

Calibration

buttons

13.

Clamp trigger

(press to open

clamp)

14. Arrow markings

15. N

on-contact

Voltage Testing

Indicator

16.

Non-Contact

Voltage Testing

Sensor

17. K-Type

temperature

probe inputs

18. Temperature

probe input

switch

FUNCTION BUTTONS

ON/OFF

To power ON the meter, rotate the Function Selector switch

from

the OFF setting to any measurement setting. To power OFF the meter,

rotate the Function Selector switch

to the OFF setting. By default,

the meter will automatically power OFF after 10 minutes of inactivity.

To deactivate the power OFF functionality press and hold the SEL

button

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) BUTTON (FOR SECONDARY FUNCTIONS)

The SEL button

activates the secondary function for each

application accessible by the function selector switch

• In Voltage

V /

and Low Impedance modes, it toggles

between AC and DC measurements.

• In Temperature

mode, it toggles between

°F (Fahrenheit) and

°C (Celsius) measurements.

• In Continuity/Resistance/Capacitance/Diode-Test

mode, it

toggles through these measurements in order

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

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

for more than 2

seconds to turn ON the backlight. Repeat process to turn 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. To manually force the meter to

measure in a different range, use the Range button

1. Press the "RANGE" button

to manually select measurement

range ( is deactivated on the LCD). Repeatedly press the

"RANGE" button

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

for more than one second ( is reactivated).

ENGLISH

FUNCTION BUTTONS

MAX/MIN

When the "MAX/MIN" button

is pressed, the meter keeps track of

the Maximum, Minimum and Average values as the meter continues

to take samples.

1. When measuring, press "MAX/MIN" button

to toggle between

the Maximum value (MAX), Minimum value (MIN) and Average

value (AVG). If a new Maximum, Minimum or Average occurs, the

display will update with the new value.

2. Press "MAX/MIN" button

for more than one second to return to

normal measuring mode.

RELATIVE MODE

When the REL/LPF button

is pressed, the meter will show the

relative value on the main display and real time measurement on the

secondary display. Press the REL/LPF button

to return to normal

measuring mode.

LOW-PASS FREQUENCY MODE

For voltage readings of high frequency motors, long press the REL/

LPF button

and meter will apply a low pass filter to ensure a more

accurate reading. Long press the REL/LPF button

to return to

normal measuring mode.

NON-CONTACT VOLTAGE TESTING

Approach the conductor under test leading with the non-contact

voltage sensor

. The meter delivers visual warning signals

when AC voltage is detected by the non-contact voltage sensor.

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

OPERATING INSTRUCTIONS

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.

AC CURRENT (LESS THAN 600A)

AC Current is measured by pressing the

clamp trigger

to open 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 passes perpendicularly through

the center of the clamp

in line with the

arrow markings

To measure current:

1. Rotate the Function Selector switch

to the AC current Asetting.

2. Place clamp

around wire. The current measurement will be

shown in the display.

The meter will auto-range to display the

measurement in the most appropriate

range.

Disconnect test leads when

measuring with the clamp.

5/32"

(4 mm)

.7" (18 mm)

WIRE

ENGLISH

OPERATING INSTRUCTIONS

INRUSH CURRENT

The Inrush feature captures starting current of a compressor motor.

Starting current can assist in diagnosing a motor before it fails.

To measure inrush current:

1. Rotate the Function Selector switch

the AC current Asetting.

2. Place clamp

around wire. The

current measurement will be shown in

the display.

3. Long press the V+A/Inrush button

for 2 seconds to enter the Inrush mode and manually select 60A

or 600A range by pressing the RANGE button

. Place the clamp

around the compressor start wire and turn motor on. The starting

current will hold on the main display. The Inrush measurement

period is 100-miliseconds.

4. Long press V+A/Inrush button

for 2 seconds to exit.

MICROAMPS DC CURRENT

Microamps DC is applied to a flame rectifier diode test on a heater

control.

1. Rotate the Function Selector switch

to the µA setting.

2. Connect the leads between flame sensor

probe and control module and turn on

heating unit.

3. The current measurement will be

shown in the main display.

NOTE: When the flame is on, there should be a measureable µA

DC signal, typically under 10 μA DC. Compare measurement to

manufacturer’s specifications.

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