Klein Tools CL220 Manual

GENERAL SPECIFICATIONS

Klein Tools CL220 is an automatically ranging, true root-meansquare (TRMS) digital clamp-meter that measures AC current via the clamp, AC/DC voltage, resistance and continuity via test-leads, and temperature via a thermocouple probe.

• Operating Altitude: 6562 ft. (2000m)
• 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 Coefficient: 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.

ELECTRICAL SPECIFICATIONS

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

Frequency Range: 50 to 60Hz

Maximum Input: 600V AC RMS or 600V DC

OTHER MEASUREMENT APPLICATIONS
Maximum Input: 600V AC RMS or 600V DC

• Continuity Check: Audible signal <10Ω, max current 1.5mA
• Sampling Frequency: 3 samples per second
• Overload: "OL" indicated on display
• Polarity: "-" on display indicates negative polarity
• Display: 3 ½ digit, 2000 Count LCD

WARNINGS - GENERAL

• 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 test leads are fully seated into jacks, 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.
• 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.
• 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

WARNINGS - NCV FUNCTION

• When NCV Function is initiated, a blinking or steady red glow and an audible beep indicate voltage present. If no indication, voltage could still be present.
• Before and after each use of the NCVT, verify operation by testing a known working circuit that is within the rating of this unit.
• Never assume neutral or ground wires are de-energized. Neutrals in multi-wire branch circuits may be energized when disconnected and must be retested before handling.
• The NCV tester WILL NOT detect voltage if:
• The wire is shielded.
• The operator is not grounded or is otherwise isolated from an effective earth ground.
• The voltage is DC.
• The NCV tester MAY NOT detect voltage if:
• The user is not holding the tester.
• The user is insulated from the tester with a glove or other materials.
• The wire is partially buried or in a grounded metal conduit.
• The tester is at a distance from the voltage source.
• The field created by the voltage source is blocked, dampened, or otherwise interfered with.
• The frequency of the voltage is not a perfect sine wave between 50 and 500Hz.
• The tester is outside of operation conditions (listed in Specifications section).
• Operation may be affected by differences in socket design and insulation thickness and type; tester may not be compatible with some types of standard or tamper resistant (TR) electrical outlets.
• Do not apply to uninsulated hazardous live conductors.
• Detection above 50V is specified under "normal" conditions as specified below. The tester may detect at a different threshold at different conditions, or may not detect at all unless:
• The tip of the tester is within 0.25" of an AC voltage source radiating unimpeded.
• The user is holding the body of the tester with his or her bare hand.
• The user is standing on or connected to earth ground.
• The air humidity is nominal (50% relative humidity).
• The tester is held still.

SYMBOLS ON METER

AC (Alternating Current)

DC (Direct Current)

Resistance (in Ohms)Audible Continuity

Double Insulated Class IIGround

Warning or CautionRisk of Electrical Shock

Suitable for uninsulated hazardous live conductors

V
Voltage (Volts)

A
Amperage (Amps)

COM
Common

NCV

Non-Contact Voltage Tester

Backlight

SEL
Select

Positive

Negative

Audible Continuity

Ground

Risk of Electrical Shock

SYMBOLS ON LCD

AC
AC (Alternating Current)

DC
DC (Direct Current)

Negative Reading

H
Data Hold

Auto Ranging

MAX Maximum Value Hold

Low Battery

M
Mega (value x 10⁶)

m
milli (value x 10^-3)

k
kilo (value x 10³)

V
Volts

A
AmpsOhms

NCV
Non-Contact Voltage TesterAuto Power-Off

Hazardous Voltage Indicator

Ohms Auto

Power-Off

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

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. The AutoPower Off icon will be visible in the display. By default, the meter 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 2 switch to OFF, then power ON the meter. To deactivate Auto-Power OFF functionality press and hold the "SEL/NCV" button 12 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 / NCV BUTTON (FOR NCV TESTING)

Press and hold the SEL/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 14. In the presence of AC voltage, the red NCV light 13 will illuminate and audible signals (beeps) will sound. Release the "SEL/NCV" button to exit NCV testing mode.

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

BACKLIGHT

Press Backlight button symbol 6 to turn ON or OFF the backlight. 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. To manually force the meter to measure in a different range, use the "RANGE" button 7 .

1. Press the "RANGE" button7 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" button7 for more than two seconds ( is reactivated).

MAX

When the "MAX" button 8 is pressed, the meter keeps track of the Maximum value as the meter continues to take samples.

1. When measuring, press "MAX" button8 to display the maximum value. If a new maximum occurs, the display updates with that new value.
2. Press "MAX" button 8 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.

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.

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.

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 400A)

AC Current is measured by pressing the clamp trigger 10 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 10 fully released, and that the wire passes perpendicularly through the center of the clamp in line with the arrow markings 11.

To measure current:

1. Rotate the Function Selector switch2 to the 200/400 A setting.
   
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 2 to the 2/20 A setting for improved resolution.

Disconnect test leads when measuring with the clamp.

AC/DC VOLTAGE (LESS THAN 600V)

1. Insert RED test lead into VΩ jack5 , and BLACK test lead into COM jack 4 , and rotate function selector switch 2 to the DC Voltage or AC Voltage setting. Note "DC" or "AC" 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.

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.

Manual Mode Sequence

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

RESISTANCE MEASUREMENTS

1. Insert RED test lead into VΩ jack5 , and BLACK test lead into COM jack 4 , and rotate function selector switch 2 to the Resistance 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.
   

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 jack5 and BLACK test lead into COM jack 4 , and rotate function selector switch 2 to the Continuity 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".
   

DO NOT attempt to measure continuity on a live circuit.

TEMPERATURE

1. Insert K-type thermocouple into the VΩ 5 and COM 4 jacks (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, press the "SELECT" button 12 once. Ensure that the appropriate icon (either °F or °C) appears on the display.
2. 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.
   

Remove thermocouple before switching meter to other measurement functions.

The thermocouple included with the original purchase is suitable for temperatures below 446°F / 230°C only. To measure higher temperatures, a K-type thermocouple with the appropriate measurement range should be used.

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.
   

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.

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.