1. Introducció
The Greenlee CM-660 is a general-purpose AC True RMS clamp meter designed for accurate electrical measurements. This instrument is capable of measuring AC currents, DC voltages, resistance, and frequency. It incorporates a digital low-pass filter for precise readings on variable frequency drives (VFDs) and features AmpTip™ technology for enhanced accuracy on small wires carrying low currents (60 amps o menys).
Key features include non-contact AC voltage detection, continuity testing, and diode testing. The meter can record average, maximum, and minimum readings, and offers two voltage detection modes: non-contact or single test lead. It is powered by two 1.5V AAA batteries and comes with test leads and a carrying case for convenience. The CM-660 has a 6000-count LCD display and a 1.18-inch jaw opening. It is UL listed, ensuring compliance with safety standards.

Figure 1.1: Greenlee CM-660 General Purpose AC Clamp Metre.
2. Informació de seguretat
Always adhere to safety precautions when using electrical test equipment. Failure to do so may result in injury or damage to the meter.
- Llegeix les instruccions: Read and understand all instructions and safety information before operating the meter.
- Personal qualificat: This meter should only be used by qualified personnel who are familiar with electrical hazards.
- Equips de protecció individual (EPI): Always wear appropriate PPE, including safety glasses and insulated gloves, when working with electrical circuits.
- Voltage Límits: No supereu el volum màximtage ratings specified for the meter (600 VAC/DC).
- Límits actuals: Do not exceed the maximum current ratings (600 Amps).
- Inspect Test Leads: Before each use, inspect test leads for damage. Do not use if insulation is cracked or if the conductor is exposed.
- Vol. Sense contactetage Detecció: Use non-contact voltage detection as a preliminary check only. Always verify with direct contact measurements.
- Substitució de la bateria: Ensure the meter is disconnected from all circuits before opening the battery compartment.
- Condicions ambientals: Do not use the meter in wet conditions or in the presence of explosive gases or dust.
- Proper Function: If the meter appears to be damaged or is not operating correctly, discontinue use immediately.
3. Configuració
3.1 Instal·lació de la bateria
The Greenlee CM-660 requires two 1.5V AAA batteries for operation. These are typically included with the meter.
- Ensure the meter is turned OFF and disconnected from any electrical circuits.
- Localitzeu la tapa del compartiment de la bateria a la part posterior del mesurador.
- Feu servir un tornavís per afluixar el cargol que fixa la tapa de la bateria.
- Remove the cover and insert two AAA batteries, observing the correct polarity (+/-) as indicated inside the compartment.
- Col·loqueu la tapa de la bateria i premeu el cargol amb seguretat.
3.2 Inspecció inicial
Before first use, and periodically thereafter, perform a visual inspection of the meter and its accessories.
- Check the meter casing for any cracks, damage, or signs of wear.
- Inspect the test leads for frayed insulation, exposed wires, or damaged connectors.
- Ensure the jaw mechanism opens and closes smoothly and securely.
- Verify the display is clear and free from defects when the meter is powered on.

Figure 3.1: Included test leads and carrying case.
4. Instruccions de funcionament
The Greenlee CM-660 offers various measurement functions. Always select the appropriate function before making a measurement.
4.1 metres mésview

Figure 4.1: Diagram illustrating key features of the Greenlee CM-660 clamp meter, including the clamp jaw, AmpTip, non-contact AC voltage detection, AC voltage with digital filter, over-molded grip, and display.
- Clamp Mandíbula: Used for non-contact AC current measurements.
- AmpTip™: Provides increased accuracy for low AC currents (60 amps or less) on small wires.
- Marcador de funció: Selects the desired measurement mode (AC Current, DC Voltage, Resistance, Frequency, Continuity, Diode).
- Visualització: 6000-count LCD for clear reading of measurements.
- Entrades de cables de prova: Ports for connecting test leads for voltage, resistance, continuity, and diode measurements.
- Vol. AC sense contactetage Detecció: Integrated sensor for detecting live AC voltagi sense contacte directe.
- Digital Low Pass Filter: Improves accuracy when measuring AC voltage on variable frequency drives.
4.2 Measuring AC Current (Clamp)
- Turn the function dial to the AC current (A~) position.
- Obriu el clamp mandíbula prement la palanca.
- Enclose a single conductor with the clamp jaw. Ensure the jaw is fully closed around the conductor.
- Llegiu el valor del corrent altern a la pantalla.
- For small wires carrying 60 amps or less, the AmpTip™ feature automatically provides increased accuracy.

Figure 4.2: The CM-660 clamp mesurador en ús, mesurant el corrent per clampal voltant d'un sol conductor.
4.3 Mesurar DC Voltage
- Insert the red test lead into the VΩHz input and the black test lead into the COM input.
- Turn the function dial to the DC voltagposició e (V=).
- Connecteu el cable de prova vermell al costat positiu del circuit i el cable de prova negre al costat negatiu.
- Llegeix el vol DCtage valor a la pantalla.
4.4 Mesura de la resistència
- Assegureu-vos que el circuit estigui desenergitzat abans de mesurar la resistència.
- Insert the red test lead into the VΩHz input and the black test lead into the COM input.
- Turn the function dial to the Resistance (Ω) position.
- Connecteu els cables de prova al component o circuit que s'ha de mesurar.
- Llegiu el valor de resistència a la pantalla.
4.5 Prova de continuïtat
- Assegureu-vos que el circuit estigui desenergitzat abans de realitzar una prova de continuïtat.
- Insert the red test lead into the VΩHz input and the black test lead into the COM input.
- Turn the function dial to the Continuity (Buzzer symbol) position.
- Connecteu els cables de prova a través del circuit o component.
- The meter will emit an audible tone if continuity is detected (low resistance).
4.6 Prova de díodes
- Assegureu-vos que el circuit estigui desenergitzat abans de realitzar una prova de díodes.
- Insert the red test lead into the VΩHz input and the black test lead into the COM input.
- Turn the function dial to the Diode (Diode symbol) position.
- Connecteu el cable de prova vermell a l'ànode i el cable de prova negre al càtode del díode.
- La pantalla mostrarà el volum d'avançtage drop. Reverse the leads; the display should show "OL" (Open Line) for a good diode.
4.7 Vol. AC sense contactetage Detecció
- Turn the function dial to the NCV (Non-Contact Voltage) posició.
- Hold the meter with the NCV sensor near the conductor or outlet.
- Si AC voltage is present, the meter will indicate with an audible beep and/or visual indicator.
- ADVERTIMENT: This feature is for preliminary detection only. Always verify voltage presence and magnitude with direct contact measurements using test leads.
5. Manteniment
Proper maintenance ensures the longevity and accuracy of your Greenlee CM-660 clamp metre.
5.1 Neteja
- Netegeu el comptador casing amb anunciamp drap i detergent suau. No utilitzeu netejadors abrasius ni dissolvents.
- Ensure no moisture enters the meter's openings.
- Clean the test leads regularly, especially the probe tips, to ensure good electrical contact.
5.2 Substitució de la bateria
Refer to Section 3.1 for battery installation instructions. Replace batteries promptly when the low battery indicator appears on the display to ensure accurate readings.
5.3 Emmagatzematge
- Store the meter in its carrying case when not in use to protect it from dust and physical damage.
- Si l'emmagatzemeu durant períodes prolongats, traieu les piles per evitar fuites.
- Store in a cool, dry environment, away from direct sunlight and extreme temperatures.
6. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El mesurador no s'encén. | Piles gastades o instal·lades incorrectament. | Comproveu la polaritat de la bateria; substituïu les piles. |
| Es mostra "OL" (sobrecàrrega). | La mesura supera l'abast del mesurador. | Assegureu-vos que la mesura estigui dins del rang especificat del mesurador. |
| Lectures inexactes. |
|
|
| No hi ha cap bip de continuïtat. |
|
|
7. Especificacions
The following table outlines the key specifications for the Greenlee CM-660 General Purpose AC Clamp Metre.
| Característica | Especificació |
|---|---|
| Model | CM-660 |
| Tipus de mesura | AC Current, DC Voltage, Resistance, Frequency, Continuity, Diode |
| Interval de corrent de CA | Fins a 600 Amps |
| DC Voltage Rang | Fins a 600 VDC |
| Vol. ACtage Rang | Fins a 600 VAC |
| Interval de resistència | Up to 60 kΩ |
| Interval de freqüència | 50/60 Hz (voltage/AmpTip currents), 50-400 Hz (higher currents) |
| Mostra | 6000 Count LCD |
| Obertura de la mandíbula | 1.18 polzades (30 mm) |
| Font d'alimentació | 2 piles AAA de 1.5 V |
| Classificació de seguretat | UL Listed, CAT IV 300V, CAT III 600V |
| Dimensions (L x A x A) | 5.5 x 11.4 x 2.2 polzades (aproximadament) |
| Pes de l'article | 16 unces (1 lliura) |
| Característiques especials | AmpTip™, Digital Low Pass Filter, Non-Contact AC Voltage Detection, Max/Min/Avg Recording, Data Hold, Auto Power Off |

Figure 7.1: Approximate dimensions of the CM-660 clamp meter shown in hand for scale.
8. Garantia i assistència
8.1 Informació de la garantia
Greenlee products are manufactured to high standards and are backed by a limited warranty against defects in materials and workmanship. For specific warranty terms and conditions applicable to your CM-660 clamp meter, please refer to the warranty card included with your product or visit the official Greenlee weblloc web. Conserveu el comprovant de compra per a reclamacions de garantia.
8.2 Atenció al client
For technical assistance, troubleshooting, or service inquiries, please contact Greenlee customer support. Contact information can typically be found on the Greenlee weblloc o a l'embalatge del producte.
Recursos en línia: For additional product information, FAQs, and support, visit the official Greenlee weblloc: www.greenlee.com
Product Videos and Demonstrations: For product videos and demonstrations, you may visit the link provided in some product documentation: http://tagr.com/t/V3v6VF