KLEIN TOOLS CL120 400A AC Auto-Ranging Digital Clamp Meter Instruction Manual
- June 6, 2024
- KLEIN TOOLS
Table of Contents
KLEIN TOOLS CL120 400A AC Auto-Ranging Digital Clamp Meter
GENERAL SPECIFICATIONS
Klein Tools CL120 is an automatically ranging digital clamp-meter that measures AC current via the clamp, and AC/DC voltage, resistance and continuity via test-leads.
- Operating Altitude: 6562 ft. (2000 m)
- 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.
ELECTRICAL SPECIFICATIONS
| Function | Range | Resolution | Accuracy |
|---|
AC Voltage (V AC)
| 200.0mV| 0.1mV| ±(2.5% + 10 digits)
2.000V| 1mV| ****
±(2.0% + 5 digits)
20.00V| 10mV
200.0V| 100mV
600V| 1V
DC Voltage (V DC)
| 200.0mV| 0.1mV| ±(1.0% + 8 digits)
2.000V| 1mV| ****
±(1.0% + 3 digits)
20.00V| 10mV
200.0V| 100mV
600V| 1V
- Input Impedance: 10MΩ
- Frequency Range: 45 to 400Hz
- Maximum Input: 600V AC RMS or 600V DC
AC Current (A AC)
| 2.000A| 1mA| ±(2.5% + 30 digits)
---|---|---|---
20.00A| 10mA|
±(2.0% + 10 digits)
200.0A| 100mA
400A| 1A
- Frequency Range: 50 to 60Hz
Resistance
| 200.0Ω| 0.1Ω| ±(1.2% + 5 digits)
---|---|---|---
2.000KΩ| 1Ω|
±(1.2% + 3 digits)
20.00kΩ| 10Ω
200.0kΩ| 100Ω
2.000MΩ| 1kΩ
20.00MΩ| 10kΩ| ±(2.0% + 5 digits)
- Maximum Input: 600V AC RMS or 600V DC
OTHER MEASUREMENT APPLICATIONS
Maximum Input: 600V DC or 600V AC RMS
- Continuity Check: Audible signal <10Ω, max current 1.5mA
- Sampling Frequency: Approx. 3 samples per second
- Overload: “OL” indicated on display
- Polarity: “-” on display indicates negative polarity
- Display: 3 ½ digit, 2000 Count LCD
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.
- Do not open the meter to replace batteries while the probes are connected.
- 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.
SYMBOLS ON METER
- AC (Alternating Current)
- Resistance (in Ohms)
- Double Insulated Class II
- Warning or Caution
- V Voltage (Volts)
- COM Common
- Backlight
- + Positive
- DC (Direct Current)
- Audible Continuity
- Ground
- Risk of Electrical Shock
- A Amperage (Amps)
- NCV Non-Contact Voltage Tester
- SEL Select
SYMBOLS ON LCD
- AC AC (Alternating Current)
- Negative Reading
- Auto Ranging
- Low Battery
- M Mega (value x 106)
- milli (value x 10-3)
- Amps
- NCV Non-Contact Voltage Tester
- Hazardous Voltage Indicator
- DC DC (Direct Current)
- H Data Hold
- MAX Maximum Value Hold
- Audible Continuity
- k kilo (value x 103)
- V Volts
- Ohms
- Auto Power-Off
FEATURE DETAILS
NOTE: There are no user-serviceable parts inside meter.
- 2000 count LCD display
- Function selector switch
- Clamp 10. Clamp trigger
- “COM” jack 11. Arrow markings
- “VΩ” jack 12. NCV Button
- Backlight button 13. NCV Light
- “RANGE” button
- “MAX” (Maximum) button
- Data Hold button
- Data Hold button
- Clamp trigger
- Arrow markings
- NCV Button
- NCV Light
- NCV Sensing Antenna
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 Auto-Power 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 “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.
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 .
- 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.
- To return to auto-ranging mode, press and hold the “RANGE” button 7 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.
- When measuring, press “MAX” button 8 to display the maximum value. If a new maximum occurs, the display updates with that new value.
- 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.
NCV
Press and hold the “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. As the NCV sensing antenna
13 approaches the voltage source, the frequency of the audible sound will
increase. Release the “NCV” button to exit NCV testing mode.
NOTE: Only voltages of 40V AC or greater will be detected.
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.
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:
- Rotate the Function Selector switch 2 to the 200/400 A setting.
- 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)
- Insert RED test lead into VΩ jack 5 , 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.
- 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.
- 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.
- To access mV range for V AC the “RANGE” button 7 must be used.
- NOTE: When voltages in excess of 25V AC or 60V DC are will appear on the measured, the Hazardous Voltage Indicator display.
RESISTANCE MEASUREMENTS
- Insert RED test lead into VΩ jack 5 , 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.
- Remove power from circuit.
- 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
- 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 setting.
- Remove power from circuit.
- 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.
MAINTENANCE
BATTERY REPLACEMENT
When indicator is displayed on LCD, batteries must be replaced.
- Loosen captive screw and remove battery cover.
- Replace 3 x AAA batteries (note proper polarity).
- 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.
Test Equipment Depot – 800.517.8431 – 5 Commonwealth Ave, Woburn, MA 01801 KTestEquipmentDepot.com
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>