1. Pengenalan
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 atau kurang).
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 meter.
2. Maklumat Keselamatan
Always adhere to safety precautions when using electrical test equipment. Failure to do so may result in injury or damage to the meter.
- Baca Arahan: Read and understand all instructions and safety information before operating the meter.
- Kakitangan Berkelayakan: This meter should only be used by qualified personnel who are familiar with electrical hazards.
- Alat Pelindung Diri (PPE): Sentiasa pakai PPE yang sesuai, termasuk cermin mata keselamatan dan sarung tangan bertebat, semasa bekerja dengan litar elektrik.
- Voltage Had: Jangan melebihi vol maksimumtage ratings specified for the meter (600 VAC/DC).
- Had Semasa: 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. Bukan Kenalantage Pengesanan: Use non-contact voltage detection as a preliminary check only. Always verify with direct contact measurements.
- Penggantian Bateri: Ensure the meter is disconnected from all circuits before opening the battery compartment.
- Keadaan Persekitaran: 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. Persediaan
3.1 Pemasangan Bateri
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.
- Cari penutup petak bateri di bahagian belakang meter.
- Gunakan pemutar skru untuk melonggarkan skru yang menahan penutup bateri.
- Remove the cover and insert two AAA batteries, observing the correct polarity (+/-) as indicated inside the compartment.
- Gantikan penutup bateri dan ketatkan skru dengan selamat.
3.2 Pemeriksaan Awal
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. Arahan Operasi
The Greenlee CM-660 offers various measurement functions. Always select the appropriate function before making a measurement.
4.1 Meter Lebihview

Figure 4.1: Diagram illustrating key features of the Greenlee CM-660 clamp meter, including the clamp jaw, AmpTip, non-contact AC voltage pengesanan, vol ACtage with digital filter, over-molded grip, and display.
- Clamp rahang: Used for non-contact AC current measurements.
- AmpTip™: Provides increased accuracy for low AC currents (60 amps or less) on small wires.
- Dail Fungsi: Selects the desired measurement mode (AC Current, DC Voltage, Resistance, Frequency, Continuity, Diode).
- paparan: 6000-count LCD for clear reading of measurements.
- Input Bakal Pelanggan Ujian: Ports for connecting test leads for voltage, resistance, continuity, and diode measurements.
- Vol. AC Bukan Kenalantage Pengesanan: Integrated sensor for detecting live AC voltage tanpa sentuhan langsung.
- 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.
- Buka clamp jaw by pressing the lever.
- Sertakan konduktor tunggal dengan clamp rahang. Pastikan rahang ditutup sepenuhnya di sekeliling konduktor.
- Baca nilai semasa AC pada paparan.
- For small wires carrying 60 amps or less, the AmpTip™ feature automatically provides increased accuracy.

Figure 4.2: The CM-660 clamp meter in use, measuring current by clampmengelilingi satu konduktor.
4.3 Mengukur 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 voltage (V=) position.
- Sambungkan wayar ujian merah ke bahagian positif litar dan wayar ujian hitam ke bahagian negatif.
- Baca DC voltagnilai e pada paparan.
4.4 Mengukur Rintangan
- Pastikan litar dinyahtenagakan sebelum mengukur rintangan.
- 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.
- Sambungkan wayar ujian merentasi komponen atau litar yang hendak diukur.
- Baca nilai rintangan pada paparan.
4.5 Ujian Kesinambungan
- Pastikan litar dinyahdayakan sebelum menjalankan ujian kesinambungan.
- 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.
- Sambungkan petunjuk ujian merentasi litar atau komponen.
- The meter will emit an audible tone if continuity is detected (low resistance).
4.6 Ujian Diod
- Pastikan litar dinyahdayakan sebelum menjalankan ujian diod.
- 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.
- Sambungkan plumbum ujian merah ke anod dan plumbum ujian hitam ke katod diod.
- Paparan akan menunjukkan vol ke hadapantage drop. Balikkan petunjuk; paparan harus menunjukkan "OL" (Open Line) untuk diod yang baik.
4.7 Vol. AC Tanpa Kenalantage Pengesanan
- Turn the function dial to the NCV (Non-Contact Voltage) kedudukan.
- Hold the meter with the NCV sensor near the conductor or outlet.
- Sekiranya AC voltage is present, the meter will indicate with an audible beep and/or visual indicator.
- AMARAN: This feature is for preliminary detection only. Always verify voltage presence and magnitude with direct contact measurements using test leads.
5. Penyelenggaraan
Proper maintenance ensures the longevity and accuracy of your Greenlee CM-660 clamp meter.
5.1 Pembersihan
- Lap meter casing dengan iklanamp kain dan detergen lembut. Jangan gunakan pembersih atau pelarut yang melelas.
- Ensure no moisture enters the meter's openings.
- Clean the test leads regularly, especially the probe tips, to ensure good electrical contact.
5.2 Penggantian Bateri
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 Penyimpanan
- Store the meter in its carrying case when not in use to protect it from dust and physical damage.
- Jika menyimpan untuk tempoh yang lama, tanggalkan bateri untuk mengelakkan kebocoran.
- Store in a cool, dry environment, away from direct sunlight and extreme temperatures.
6. Penyelesaian masalah
| Masalah | Kemungkinan Punca | Penyelesaian |
|---|---|---|
| Meter tidak dihidupkan. | Bateri mati atau tidak dipasang dengan betul. | Periksa kekutuban bateri; menggantikan bateri. |
| "OL" (Lebihan) dipaparkan. | Measurement exceeds meter's range. | Pastikan ukuran berada dalam julat yang ditetapkan oleh meter. |
| Bacaan yang tidak tepat. |
|
|
| Tiada bip kesinambungan. |
|
|
7. Spesifikasi
The following table outlines the key specifications for the Greenlee CM-660 General Purpose AC Clamp meter.
| Ciri | Spesifikasi |
|---|---|
| Model | CM-660 |
| Jenis Pengukuran | AC Current, DC Voltage, Resistance, Frequency, Continuity, Diode |
| Julat Semasa AC | Sehingga 600 Amps |
| DC Voltage Julat | Sehingga 600 VDC |
| Vol. ACtage Julat | Sehingga 600 VAC |
| Julat Rintangan | Up to 60 kΩ |
| Julat Kekerapan | 50/60 Hz (voltage/AmpTip currents), 50-400 Hz (higher currents) |
| Paparan | 6000 Count LCD |
| Pembukaan Rahang | 1.18 inci (30 mm) |
| Sumber Kuasa | 2 x Bateri AAA 1.5V |
| Penilaian Keselamatan | UL Listed, CAT IV 300V, CAT III 600V |
| Dimensi (L x W x H) | 5.5 x 11.4 x 2.2 inci (anggaran) |
| Berat Barang | 16 auns (1 paun) |
| Ciri Khas | 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. Waranti & Sokongan
8.1 Maklumat Waranti
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 webtapak. Simpan bukti pembelian anda untuk tuntutan waranti.
8.2 Sokongan Pelanggan
For technical assistance, troubleshooting, or service inquiries, please contact Greenlee customer support. Contact information can typically be found on the Greenlee webtapak atau dalam pembungkusan produk.
Sumber Dalam Talian: For additional product information, FAQs, and support, visit the official Greenlee webtapak: 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





