Mastech M266 Digital Clamp Meter – 1000A AC Current Tester with Insulation Testing Support, Data Hold, and Rugged Professional Carrying Case

Product Description The Mastech M266 is a heavy-duty, professional-grade digital clamp meter designed for measuring high AC currents without breaking the circuit. It is an industry-standard tool for electrical contractors and maintenance engineers at Robogears Pvt Ltd, particularly when working with industrial motors, distribution panels, and HVAC systems. The M266 is unique because it features a dedicated interface for an external Insulation Tester (M261), allowing it to double as a Megger for motor winding diagnostics. Its large 50mm jaw capacity allows for easy clamping around thick industrial cables and busbars.

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Key Highlights

• High-Current Measurement: Safely measure AC current up to 1000 Amperes using the induction clamp, eliminating the need to strip wires or interrupt power.

• Insulation Test Compatibility: When paired with the optional M261 insulation tester module, the meter can measure resistance up to 2000M$\Omega$ for high-voltage safety checks.

• Data Hold Function: Includes a side-mounted "Hold" button to freeze the reading on the screen, which is essential when working in tight spaces where the display isn't clearly visible.

• Safety First Design: Built to meet IEC-1010-1 standards, featuring overload protection on all ranges and a shrouded 4mm safety jack for voltage probes.

• Rugged Portability: Comes in a high-quality zippered carrying case to protect the precision jaws and display while being transported to job sites in Pimpri or beyond.

Technical Specifications

• Display: 3.5 Digit LCD (2000 Counts)

• AC Current Accuracy: $\pm$(2.0% + 5 digits)

• DC Voltage Accuracy: $\pm$(1.0% + 2 digits)

• Continuity Test: Audible buzzer for $< 50\Omega$

• Dimensions: 235mm x 96mm x 46mm

• Weight: ~310g

[Image showing the M266 clamp meter around a single phase of a 3-phase industrial cable]