Portable insulation resistance meter UHV-2671A

UHV-2671A is a portable digital insulation resistance tester for verifying insulation resistance of electrical equipment and cables to earth. It provides multiple DC test voltages, substantial output power and a measurable short-circuit current suitable for field and laboratory verifications.

Test voltages and measurement ranges

• Rated test voltages: 100 V, 250 V, 500 V, 1000 V, 2500 V.
• Ranges by voltage: 100 V: 0.0–10 MΩ, 10–100 MΩ, 100–200 MΩ; 250 V: 0.0–10 MΩ, 10–100 MΩ, 100–500 MΩ; 500 V: 0.0–99.9 MΩ, 100–999 MΩ; 1000 V: 0.0–99.9 MΩ, 100–999 MΩ, 1.00–19.9 GΩ; 2500 V: 0.0–99.9 MΩ, 100–999 MΩ, 1.00–9.99 GΩ, 10.0–49.9 GΩ.

Measurement parameters

• Open-circuit voltage: DC 100 V ±10%; DC 250 V ±10%; DC 500 V ±20%; DC 1000 V ±20%; DC 2500 V ±20%.
• Standard measuring current (typical at specified loads): 100 V: 0.2–0.25 mA (at 0.5 MΩ); 250 V: 0.5–0.55 mA (at 0.5 MΩ); 500 V: 1.0–1.1 mA (at 0.5 MΩ); 1000 V: 1.0–1.1 mA (at 1.0 MΩ); 2500 V: 1.0–1.1 mA (at 2.5 MΩ).
• Short-circuit current: approx. 1.3 mA.
• Insulation measurement accuracy: ±5% rdg ±5 dgt.

Functions and safety

• Automatic discharge (capacitor discharge) after measurement for safe handling.
• LCD backlight for low-light operation.
• Live-line warning indicators and buzzer for presence of voltage.
• Auto power-off after 10 minutes of inactivity.
• Low-battery indication.

AC voltage measurement

• Mode: AC voltage measurement (True RMS support where applicable).
• Range: 30–600 V (50/60 Hz).
• Resolution: 1 V.
• Accuracy: ±2% rdg ±3 dgt.

Technical specifications

• LCD display: up to 999 counts.
• Over-range indication: displays "OL" for insulation resistance, "LO" for voltage.
• Auto range: shift to upper range at 1000 counts; shift to lower range at 95 counts (insulation only).
• Sampling rate: 0.5–10 times/sec.
• Operation altitude: ≤ 2000 m (indoor use).
• Operating environment: 0 °C to 40 °C; humidity ≤ 85%.
• Storage environment: -20 °C to 60 °C; humidity ≤ 90%.
• Overload protection: insulation range: AC 1200 V / 10 s; voltage range: AC 720 V / 10 s.
• Withstand voltage: AC 8320 V (50/60 Hz) / 5 s between circuit and periphery.
• Insulation impedance: >1000 MΩ / DC 1000 V (between circuit and periphery).
• Power supply: DC 9 V (6 × 1.5 V AA batteries).
• Battery current: approx. 800 mA (max).
• Battery life: approx. 15 hours.
• Dimensions: 125.4 × 174.6 × 69 mm.
• Weight: 547.44 g (without batteries and test leads).
• Also referred to as: Resistance Tester; Digital Insulation Tester.

Typical applications

• Periodic maintenance and safety checks on industrial electrical equipment.
• Verification of cable insulation during installation and commissioning.
• Field service testing and troubleshooting of motors, transformers and switchgear.
• Quality control in production and R&D laboratories.