1. Introduction
The Klein Tools CL120 Digital Clamp Meter is an automatically ranging digital clamp-meter designed for professional and DIY electrical tasks. It measures AC current and Non-Contact Voltage (NCVT) via the clamp, and AC/DC voltage, resistance, and continuity via test-leads. This manual provides essential information for safe and effective operation of your CL120 Digital Clamp Meter.
2. Safety Information
WARNING: Risk of electric shock or personal injury.
- Always wear approved eye protection.
- Do not use if the meter or test leads appear damaged.
- Do not use on circuits exceeding the specified voltage and current ratings.
- Ensure the meter is turned OFF before connecting or disconnecting test leads.
- Use caution when working with live circuits.
- Refer to local and national safety codes.
3. Package Contents
- CL120 Digital Clamp Meter
- Carrying Case
- Test Leads with CAT III/CAT IV Safety Caps
- 3 x AAA Batteries
- Instruction Manual
4. Product Features
- Versatile Clamp Meter: Measures AC current and NCVT via clamp; AC/DC voltage, resistance, and continuity via test-leads.
- Non-Contact Voltage Testing: Integrated into the clamp jaw for convenient electrical testing.
- Backlit Display: LCD shows clear readings in low-light conditions for enhanced visibility.
- Accurate Measurements: Auto-ranging technology selects the appropriate measurement range for accurate results.
- Convenient Features: Test lead holder on the side of the clamp for hands-free operation.
- Additional Features: Max, Data Hold capability for enhanced functionality and auto-power off after 10 minutes to conserve battery life.
5. Setup
5.1 Battery Installation
- Ensure the meter is turned OFF.
- Using a Phillips head screwdriver, loosen the screw on the battery compartment cover located on the back of the meter.
- Remove the cover and insert 3 AAA batteries, observing correct polarity.
- Replace the battery compartment cover and tighten the screw.
5.2 Test Lead Connection
Connect the red test lead to the VΩmA input jack and the black test lead to the COM input jack for voltage, resistance, and continuity measurements.
6. Operating Instructions
6.1 Power On/Off
Rotate the function dial from the OFF position to any desired measurement function to power on the meter. Rotate the dial back to OFF to power off.
6.2 AC Current Measurement (Clamp)
- Rotate the function dial to the 2/20A~ or 200/400A~ position.
- Open the clamp jaw by pressing the trigger.
- Place the clamp jaw around a single conductor (not a power cord with multiple wires) to measure AC current.
- Read the current value on the display.
6.3 AC/DC Voltage Measurement (Test Leads)
- Rotate the function dial to the V~ (AC Voltage) or V- (DC Voltage) position.
- Connect the test leads to the circuit points you wish to measure.
- Read the voltage value on the display.
6.4 Resistance and Continuity Measurement
- Rotate the function dial to the Ω (Resistance) or Continuity position.
- Connect the test leads across the component or circuit to be measured.
- For continuity, the meter will beep if a continuous path is detected. For resistance, read the value on the display.
6.5 Non-Contact Voltage (NCV) Detection
Press the NCV button and hold the meter's tip near a live AC voltage source. The meter will emit an audible beep and the NCV indicator light will illuminate if AC voltage is detected.
6.6 Backlight and Data Hold/Max Functions
- Backlight: Press the backlight button to illuminate the display for better visibility in low-light conditions.
- Data Hold: Press the HOLD button to freeze the current reading on the display. Press again to release.
- MAX: Press the MAX button to capture the maximum reading during a measurement.
7. Maintenance
7.1 Cleaning
Wipe the meter with a dry, lint-free cloth. Do not use abrasive cleaners or solvents.
7.2 Battery Replacement
Replace batteries when the low battery indicator appears on the display. Refer to section 5.1 for battery installation instructions.
8. Troubleshooting
- Meter does not power on: Check battery installation and ensure batteries are not depleted.
- Inaccurate readings: Ensure test leads are properly connected and the correct function is selected. Verify the circuit is within the meter's specified range.
- No continuity beep: Ensure the circuit is de-energized and the component is not open.
9. Specifications
| Specification | Value |
|---|---|
| Brand | KLEIN TOOLS |
| Model Number | CL120 |
| Power Source | Battery Powered (3 x AAA included) |
| AC Current Range | 400 Amp |
| AC/DC Voltage Range | Up to 600 Volts |
| Resistance Range | Up to 20 MΩ |
| Continuity | Yes |
| Non-Contact Voltage (NCV) | Yes |
| Backlit Display | Yes |
| Auto-Ranging | Yes |
| Data Hold / Max | Yes |
| Safety Rating | CAT III 600V |
| Item Weight | 9.8 ounces (0.61 Pounds) |
| Product Dimensions (L x W x H) | 8.45 x 3.51 x 1.51 inches |
10. Official Product Videos
Video 1: A comprehensive review of the Klein Tools CL120 Digital Clamp Meter, demonstrating its features and practical applications, including use with a line splitter.
Video 2: An informational video covering essential aspects and functionalities of the Klein Tools Clamp Meter.
Video 3: A showcase of Klein Tools Digital Clamp Meters, highlighting their robust design and various measurement capabilities.
Video 4: A comparison between the Klein Tools CL120 and CL390 clamp meters, helping users decide which model best suits their needs.
Video 5: A detailed review assessing the value and performance of the Klein Tools CL120 Digital Clamp Meter.
Video 6: A demonstration of the Klein Digital Clamp Meter in various electrical testing scenarios.
11. Warranty and Support
Klein Tools products are manufactured to high standards of quality and durability. For warranty information, product registration, or technical support, please visit the official Klein Tools website or contact their customer service. Keep your purchase receipt for warranty claims.
For further assistance, please refer to the contact information provided on the official Klein Tools website: www.kleintools.com
