Klein Tools CL450 Instruction Manual
INSTRUCTION MANUAL
ENGLISH
FRANÇAIS pg. 37
ESPAÑOL pg. 19
HVAC Clamp Meter
1000V
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 Coefcient: 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
5
SYMBOLS ON METER
Alternating Current (AC) Direct Current (DC)
A
Amperage
V
Voltage
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 103)
m
mili (value x 10-3)
M
Mega (value x 106)
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 A setting.
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 A setting.
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.
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/DC voltage
V
/
setting.
The meter defaults to AC
measurement.
To measure DC, press the SEL button 9 to toggle
between AC and DC modes. The AC or DC icon on the LCD
indicates which mode 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.
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 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
12
OPERATING INSTRUCTIONS
AC VOLTAGE + DC VOLTAGE FUNCTION
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 voltage
V
/
setting.
The meter defaults to AC
measurement.
Long press the SEL button 9 to enter the
ACV + DCV mode.
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. The ACV + DCV measurement will
be in the main display, and the secondary display will have the
individual voltages that toggle between the AC and DC voltages.
3. Long press the SEL button 9 to exit the mode.
AC VOLTAGE + AC AMPERAGE FUNCTION
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 voltage
V
/
setting.
The meter defaults to AC
measurement.
To measure DC, press the SEL button 9 to toggle
between AC and DC modes. The AC or DC icon on the LCD
indicates which mode is selected. Press the
V+A/Inrush button
10
to enter the ACV + ACA mode.
2. Press clamp trigger
13
to open clamp 3 and place around
current-carrying wire.
3. The main display will show AC Voltage and the secondary
display will show AC Amperage.
4. Press V+A/Inrush button
10 to exit.
ENGLISH
Black lead Red lead
Black lead Red lead
13
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/Capacitance/Diode-Test
setting.
NOTE: The meter defaults to Continuity testing in this mode. Press
the SEL 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/Capacitance/Diode-Test
setting.
NOTE: The meter defaults to Continuity testing in this mode. Ensure
that the Continuity Testing icon
is visible on the display. If not,
press the SEL 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 10Ω, 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
14
ENGLISH
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
Continuity/Resistance/ Capacitance/Diode-Test
setting.
2.
NOTE: The meter defaults to Continuity testing in this mode.
Press the SEL button 9 twice to enter capacitance mode. The
Capacitance icon will appear on the display.
3. Remove power from circuit.
4. Measure capacitance by connecting test leads across the capacitor.
The meter will auto-range to display the measurement in the most
appropriate range.
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/ Capacitance/Diode-Test
setting.
NOTE: The meter defaults to Continuity testing in this mode. Press
the SEL button 9 three times 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.
Black lead Red lead
Black lead Red lead
15
TEMPERATURE
1. Remove leads from meter and slide the temperature probe input
switch 18 to close jacks and expose the K-Type thermocouple
ports.
2. Insert K-type thermocouple into port T1 17 (observe polarity
markings on thermocouple and meter), and rotate function
selector switch 2 to the Temperature setting.
NOTE: The meter defaults to Fahrenheit scale in this mode. To
enter Celsius scale, long-press the SEL button 9. Ensure that the
appropriate icon (either °F or °C) appears on the display.
NOTE: The meter may be set to default to the Celsius scale by
powering-ON the meter from the OFF position with the Data Hold
& Backlight button
6
depressed. To re-set the default to the
Fahrenheit scale repeat the power-ON sequence.
3. To measure temperature, make contact between the
thermocouple tip and the object being measured. When
thermocouple tip and object are in thermal equilibrium, the
measurement on the display will stabilize. The meter will autorange to display the measurement in the most appropriate range.
Remove thermocouple before switching meter to other
measurement functions.
T
he thermocouple included with the original purchase
is suitable for temperatures below 356°F / 180°C only.
To measure higher temperatures, a K-type thermocouple
with the appropriate measurement range should be used.
NOTE: The main display shows Frequency and the secondary display
shows Duty-Cycle.
2. Measure by connecting test leads across the circuit.
OPERATING INSTRUCTIONS
Black lead Red lead
K-Type Thermocouple
16
OPERATING INSTRUCTIONS
DIFFERENTIAL TEMPERATURE
1. When two K-Type thermocouples are attached to the meter,
the main display will show T1 temperature and the secondary
display will show T2 temperature. Insert one K-type thermo
couple into port T1 and another into port T2.
2. To measure the differential temperature press the "SEL" button
9
and the T1-T2 icon will be displayed. The main display will
show the differential temperature value.
3. Press the SEL button
9
again to exit differential temperature.
TEMPERATURE CALIBRATION
1. Remove leads from meter and slide the temperature probe input
switch 18 to close jacks and expose the K-Type thermocouple ports.
2. Insert K-type thermocouple into ports 17 (observe polarity
markings on thermocouple and meter), and rotate function
selector switch
2
to the Temperature setting.
3. Long press the MAX/MIN button 8 and the V+A/Inrush button
10
at the same time. The meter will beep, and the CAL icon will
appear on the secondary display and the main display will have the
temperature measurement.
NOTE: In T-CAL mode, the T1 and T2 channels can be selected for
calibration by pressing the SEL button 9, and the °F and °C units
can be changed by a long press to the SEL button 9.
4. Place the K-Type thermocouple in a known temperature system
(eg. ice water, boiling water, or other standard temperature
source) and allow to stabilize.
5. Utilize the RANGE button
7
to increase the measured value and
the REL/LPF button
11 to decrease the value. Once adjusted to
the correct value, the T-CAL icon will appear on the display and
it will remain on the screen to designate a user calibration.
NOTE: To clear calibration data, long-press the HOLD 6 button to
default to factory temperature calibration. The T-CAL icon will be
removed from the display.
6. To exit the calibration mode, long-press the MAX/MIN
8
button
and the
V+A/Inrush button 10
at the same time.
ENGLISH
K-Type Thermocouples
17
MAINTENANCE
BATTERY REPLACEMENT
When the indicator is displayed, batteries must be replaced.
1. Loosen screw on battery door.
2. Replace 3 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.
BAR GRAPH
The Bar Graph is an analog representation of the measurement. It responds
to the measurement approximately 3-5 times faster than the digits in the
digital display which, in certain circumstances, may allow the user to have
a clearer view of quick changes in the property being measured. In any
given range, the bar graph scales from zero on the left hand side to the
maximum value of the range on the right hand side of the display.
Bar graph
OPERATING INSTRUCTIONS
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