HT Instruments HT9025 Digital Clamp Meter True RMS 1000A AC/DC CAT III 1000V CAT IV 600V CAT II 1500V 6000 Counts 1009025

Electrical troubleshooting in modern PV installations, industrial plants and commercial switchboards demands a clamp meter that can handle high energy safely while delivering accurate True RMS readings. The HT Instruments HT9025 digital clamp meter meets that need with a 1000 A AC/DC jaw, 6000-count display and safety ratings up to CAT IV 600 V, CAT III 1000 V and CAT II 1500 V for photovoltaic circuits.

Who is it for

Electricians, solar technicians and maintenance engineers who measure high-current AC and DC circuits, test inverters and combiner boxes, and need a rugged, auto-ranging meter with advanced functions like inrush current capture and low-pass filtering.

Main features

• True RMS AC current and voltage measurement for accurate readings on non-linear loads.
• Wide AC/DC current range from 0.1 A to 1000 A with a 45 mm jaw opening.
• AC/DC voltage up to 1000 V, resistance to 60 MΩ, capacitance to 60 mF, frequency to 10 MHz and temperature from -20 °C to 760 °C.
• Inrush current measurement to capture motor starting surges.
• Low pass filter (LPF) for stable readings on variable frequency drives.
• Non-contact voltage (NCV) detection for quick safety checks.
• MIN/MAX/PEAK hold, data hold and backlit display for use in dark panels.
• Powered by 2 x 1.5 V AAA batteries.

Specifications

• Display: 6000 counts, backlit
• AC current: 0.1 A – 1000 A, True RMS
• DC current: 0.1 A – 1000 A
• AC voltage: 0.1 V – 1000 V, True RMS
• DC voltage: 0.1 V – 1000 V
• Resistance: 0.1 Ω – 60 MΩ
• Capacitance: 0.001 nF – 60 mF
• Frequency: 0.001 Hz – 10 MHz
• Temperature: -20 °C to 760 °C (-4 °F to 1400 °F)
• Jaw opening: 45 mm
• Safety: CAT IV 600 V, CAT III 1000 V, CAT II 1500 V (PV)
• Auto ranging: Yes
• Non-contact voltage (NCV): Yes
• Inrush current: Yes
• Low pass filter: Yes
• Data hold: Yes
• MIN/MAX/PEAK hold: Yes
• Power supply: 2 x 1.5 V AAA batteries

Tips

For solar string measurements, use the CAT II 1500 V DC range and the low-pass filter to avoid interference from inverters. Always verify the jaw is fully closed around the conductor for accurate current readings.