Heavy-Duty High-Current Industrial Diagnostics: MESTEK CM86A / CM86B 1000A True-RMS Digital Clamp Meter Series in Malaysia

For electrical power distribution engineers, heavy industrial plant technicians, solar utility contractors, and commercial HVAC specialists across Malaysia, measuring extreme electrical loads safely and accurately requires specialized industrial-grade instruments. MTM Precision is proud to introduce the MESTEK CM86A and CM86B 1000A TRUE-RMS Digital Clamp Meter Series—a family of heavy-duty, high-capacity clamp meters engineered for high-energy electrical testing up to 1000A (and expandable up to 3000A AC via an optional iFlex flexible coil).

Certified to EN61010-2-032 standards with a maximum CAT III 1000V safety rating, the MESTEK CM86 series features a large 42mm jaw opening, 6000 Counts display resolution, VFD variable frequency drive filtering, 1000A motor Inrush current measurement, non-contact voltage (NCV) detection, and thermocouple temperature testing in a rugged 450g enclosure.

🌟 Key Features & Heavy Industrial Capabilities

1000A High-Current Measurement & Optional 3000A iFlex Clamp: Measure up to 1000A AC (CM86A) or 1000A AC/DC (CM86B) directly via the primary jaw. Supports an optional iFlex flexible current clamp to expand measurement capability up to 3000A AC around oversized busbars or tight cable bundles.
CAT III 1000V Industrial Safety Compliance: Designed for high-energy environments including industrial distribution sub-stations, transformer yards, and heavy machinery breaker panels.
1000A Inrush Current Measurement: Accurately captures high transient startup surge currents from large electric motors, compressors, and industrial machinery, preventing false tripping diagnostics.
VFD (Variable Frequency Drive) Mode: Filters out high-frequency pulse-width modulation (PWM) noise and harmonic interference, ensuring clean, true readings on inverter-driven equipment and VFD motors.
True-RMS Processing & 6000 Counts Resolution: Delivers precise voltage and current accuracy even on non-linear, distorted AC signals commonly found in modern variable-speed drives and electronic power supplies.
Large 42mm Jaw Opening: Generous jaw capacity readily accommodates thick parallel cables, heavy industrial feeders, and large copper busbars.
K-Type Thermocouple Temperature Diagnostic: Supports temperature measurement from -20°C to 1000°C (-4°F to 1832°F) for rapid thermal checking of electrical lugs, breaker connections, and motor housings.

📊 Detailed Model Comparison & Range Matrix

The MESTEK CM86 Series offers two specialized configurations for AC-only high-current testing (CM86A) and versatile AC/DC high-current testing (CM86B):

Measurement Parameter	CM86A (1000A AC)	CM86B (1000A AC/DC)	Measurement Accuracy
DC Voltage	600mV / 6V / 60V / 600V / 1000V	600mV / 6V / 60V / 600V / 1000V	± (0.8% + 3)
AC Voltage	6V / 60V / 600V / 750V	6V / 60V / 600V / 750V	± (1.0% + 5)
DC Current	—	60A / 600A / 1000A	± (2.5% + 10)
AC Current	60A / 600A / 1000A	60A / 600A / 1000A	± (2.5% + 10)
iFlex Flexible Clamp	3000A (Optional)	3000A (Optional)	± (3.0% + 5)
Inrush Current	1000A Peak	1000A Peak	± (10% + 60)
Resistance	600Ω / 6kΩ / 60kΩ / 600kΩ / 6MΩ / 60MΩ	600Ω / 6kΩ / 60kΩ / 600kΩ / 6MΩ / 60MΩ	± (2.0% + 5)
Capacitance	600nF / 6uF / 60uF / 600uF / 6mF / 60mF	600nF / 6uF / 60uF / 600uF / 6mF / 60mF	± (5.0% + 10)
K-Type Temperature	-20°C to 1000°C (-4°F to 1832°F)	-20°C to 1000°C (-4°F to 1832°F)	± (2.0% + 2)

⚙️ Functional Features & General Hardware Specifications

Feature Breakdown:

Feature Metric	CM86A	CM86B
Display Counts	6000 Counts	6000 Counts
Jaw Opening Diameter	Φ 42 mm	Φ 42 mm
True-RMS Technology	Yes	Yes
VFD Mode	Yes	Yes
Inrush Current	Yes (1000A)	Yes (1000A)
Continuity Buzzer	Sound Alarm (< 30Ω)	Sound Alarm (< 30Ω)
Data Hold & Backlight	Yes	Yes
LED Flashlight	Yes	Yes
NCV Detection	Yes	Yes
Input Impedance	1MΩ	1MΩ
Low Battery Indication	Active below 2.4V	Active below 2.4V

Hardware Specifications:

Power Battery Requirements: 2 x 1.5V AAA Batteries
Physical Unit Dimensions: 254 mm x 92 mm x 45 mm
Unit Weight: Approximately 450 g (Heavy-duty protective industrial housing)
Safety Compliance Rating: EN61010-2-032, CAT III 1000V
Included Standard Accessories: Clamp Meter Unit, Heavy-Duty Test Leads, K-type Thermocouple, Carrying Bag, AAA Batteries, User Manual, Color Box (3000A iFlex Coil Sold Separately)

🏭 Primary Application Fields in Malaysia

Heavy Industrial Plants & Utilities: Testing high-current main feeders, power distribution transformers, switchgear panels, and heavy manufacturing machinery up to 1000A/3000A.
Solar PV Farms & Sub-Stations: DC string current auditing (CM86B) and high-voltage AC grid tie connection diagnostics.
Commercial HVAC & Central Chillers: Measuring high motor inrush startup currents on large centrifugal chillers, cooling tower fan drives, and large pumps.
Data Centers & Industrial Power Quality: Auditing 3-phase neutral line harmonic currents using True-RMS and iFlex coil accessories.

📞 Contact & Purchasing Information in Malaysia

For product inquiries, volume sales, technical support, or official quotations regarding MESTEK test instruments in Malaysia, please contact MTM Precision:

Contact MTM Precision

MTM Precision Sdn. Bhd.

Showroom & Service Centre

No. 29-1 & 29-2, Jalan Bandar 18,

Pusat Bandar Puchong,

47160 Puchong, Selangor, Malaysia

Website: www.mtmpre.com.my

Email: mtmpre@yahoo.com

WhatsApp: +6016-660 7346

Office Tel: +603-80807172