KYORITSU Digital Insulation-Continuity Tester Model 3005A

The KYORITSU 3005A Digital Insulation/Continuity Tester (Made in Thailand) is a handheld digital instrument designed primarily for measuring insulation resistance and continuity in electrical circuits. Encased in a durable housing with protective finger guards and belt-strap fittings, it features a liquid crystal display and a 30-segment bar graph to indicate readings. Powered by eight AA batteries, it delivers test voltages of 250 V, 500 V, or 1000 V DC, enabling users to verify insulation integrity up to 1999 MΩ. In continuity mode, it applies a test current to detect resistance as low as 0.20 Ω, with a measuring range up to 1999 Ω, and can also display AC voltages up to 600 V.

A live circuit warning indicator and buzzer alert the operator if the circuit under test is energized, enhancing safety. After insulation testing, built-in auto discharge circuitry removes residual charge from capacitive components automatically, and an audible confirmation indicates when it is safe to touch the circuit. The instrument’s microprocessor-controlled dual integration system ensures stable, repeatable measurements even under varying temperature and battery conditions.

Lightweight (≈970 g without batteries) and designed to IEC CAT III 300 V standards, the KEW 3005A is suited for field service, maintenance, and troubleshooting of electrical equipment such as motors, transformers, switchgear, and cables.

• Bar graph to display insulation resistance
• Displays the value of external AC voltage with a flashing symbol
• Auto null function to automatically subtract the test lead resistance before displaying the real continuity resistance value
• Live circuit warning buzzer
• Releasing the test button automatically discharges the charges stored in the circuit under test
• 200mA measuring current on continuity testing