Klein Tools CL450 User manual

INSTRUCTION MANUAL
ENGLISH
FRANÇAIS pg. 37
ESPAÑOL pg. 19
HVAC Clamp Meter
1000V
600A
60M
Ω
True RMS
Measurement
Technology
• MICROAMPS DC
• DIFFERENTIAL
TEMPERATURE
• DIGITAL
TEMPERATURE
CALIBRATION
• INRUSH CURRENT
• LOW IMPEDANCE
CL450

2
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

3
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

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 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 1 °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
1 °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

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SYMBOLS ON METER
Alternating Current (AC) Direct Current (DC)
AAmperage VVoltage
µA Micro Amps
Hz
Frequency
° F
Degrees Fahrenheit
° C
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: I 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
k
kilo (value x 10
3
)
m
mili (value x 10
-3
)
M
Mega (value x 10
6
)
n
nano (value x 10
-9
)
μ
micro (value x 10
-6
)
V
Volts
Ohms
F
Farads
A
Amps Relative Mode
LoZ
Low Impedance
%
Duty Cycle
Hz
Frequency (Hertz)
° C
Degrees (Celsius)
° F
Degrees (Fahrenheit) INRUSH Inrush Current
LPF
Low-Pass Filter
T1
T1 Temperature
T2
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.

6
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
9.
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
1
9
7
3
13
10
16
15
54
8
11
6
14
12
17
18
2

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 10 minutes of inactivity.
To deactivate the power OFF functionality press and hold the SEL
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) BUTTON (FOR SECONDARY FUNCTIONS)
The SEL button
9
activates the secondary function for each
application accessible by the function selector switch
2
:
• 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
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 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
7
.
1. Press the "RANGE" button
7
to manually select measurement
range ( 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 ( is reactivated).

8
ENGLISH
FUNCTION BUTTONS
MAX/MIN
When the "MAX/MIN" button
8
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
8
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
8
for more than one second to return to
normal measuring mode.
RELATIVE MODE
When the REL/LPF button
11
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
11
to return to normal
measuring mode.
LOW-PASS FREQUENCY MODE
For voltage readings of high frequency motors, long press the REL/
LPF button
11
and meter will apply a low pass filter to ensure a more
accurate reading. Long press the REL/LPF button
11
to return to
normal measuring mode.
NON-CONTACT VOLTAGE TESTING
Approach the conductor under test leading with the non-contact
voltage sensor
16
. The meter delivers visual warning signals
15
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

9
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
13
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
13
fully released, and
that the wire passes perpendicularly through
the center of the clamp
3
in line with the
arrow markings
14
.
To measure current:
1. Rotate the Function Selector switch
2
to the AC current Asetting.
2. Place clamp
3
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

10
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
2
to
the AC current Asetting.
2. Place clamp
3
around wire. The
current measurement will be shown in
the display.
3. Long press the V+A/Inrush button
10
for 2 seconds to enter the Inrush mode and manually select 60A
or 600A range by pressing the RANGE button
7
. 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
10
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
2
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.