Automatic Electrical Tester, 1000V, 600A

Automatic Electrical Tester, 1000V, 600A Clamp-on Meter

The Greenlee CMT-90 Automatic Electrical Tester is a handheld clamp-on meter designed for precise electrical measurements including AC and DC voltage, AC current, resistance, diode testing, and continuity verification. This true RMS-reading meter automatically selects the appropriate measurement function based on input, making it an essential tool for electrical distributors, lighting solutions providers, wire and cable specialists, and switchgear suppliers. Its auto backlit display ensures readability in low-light environments, supporting efficient and safe electrical testing.

Specifications

• Maximum Conductor Size: 33 mm (1.30")
• Display: 10,000-count LCD
• Display Update Rate: 3 per second for voltage, diode test, and resistance; 2 per second for current
• Measurement Categories: Category III, 1000 V, and Category IV, 600 V
• Duty Cycle (Voltage above 30 V): 30 seconds ON (max), 2 minutes OFF (min)
• Operating Temperature: 0 ¬∞C to 50 ¬∞C (32 ¬∞F to 122 ¬∞F) with varying humidity limits
• Storage Temperature: ‚Äì20 ¬∞C to 60 ¬∞C (‚Äì4 ¬∞F to 140 ¬∞F)
• Altitude: 2000 m (6500') maximum
• Battery: 9 V (NEDA 1604, JIS 006P or IEC 6F22)
• Battery Life: Approximately 250 hours (alkaline)
• Automatic Power Off: After approximately 20 minutes (disable option available)
• Accuracy: AC Current ¬±(1.9% + 1 A to 2 A), AC Voltage ¬±(1.5% + 0.3 V), DC Voltage ¬±(1.0% + 0.2 to 0.4 V), Resistance ¬±(2.0% + 4 Œ©), Diode Test ¬±(1.0% + 0.2 V)
• Maximum Current Measurement: 600 A
• Maximum Voltage Measurement: 1000 V
• True RMS Measurement for AC signals

Features

• True RMS reading for accurate AC current and voltage measurements regardless of waveform
• Automatic function detection for AC/DC voltage, AC current, resistance, diode test, and continuity
• Smart data hold with audible and visual alerts for input changes during hold mode
• Auto Hold feature for stable AC current measurements above 3 A with recall capability
• Auto backlit LCD display for clear visibility in dark or confined spaces
• Power-on self-test with battery capacity indicator and failure warning
• Low input impedance mode to prevent false readings caused by ghost voltage
• Compliant with IEC safety standards for Category III 1000 V and Category IV 600 V environments
• Compact, lightweight design with a 1.675 lb (0.76 kg) product weight for easy portability
• Constructed with durable materials suitable for industrial and commercial electrical testing
• Includes safety features and warnings to ensure operator protection when testing live circuits

Downloads & Links

• Operator's Manual 2
• Operator's Manual 1