KYORITSU KEW 3005A Digital Insulation
The Kyoritsu KEW 3005A 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 fittings for a strap belt, 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.
Features:
- Designed and tested to comply with safety standards: IEC 61010-1, IEC 61010-2-030 CAT III 300 V, Pollution Degree 2; IEC 61010-031; IEC 61557-1,2,4,10.
- Bargraph display to visualize measured results.
- Strap belt attachment for both-hands-free operation.
- Live circuit warning indication and audible buzzer.
- Auto discharge function to remove stored charge after insulation tests.
- Auto power-off after approximately 10 minutes of inactivity.
Specifications:
| Specification | Details |
|---|---|
| Insulation Resistance Ranges: | • 0 – 19.99 MΩ / 0 – 199.9 MΩ / 0 – 1999 MΩ at 250 V, 500 V, 1000 V DC • Open-circuit voltage: 250 V DC ±20 % (250 V range), 500 V DC ±20 % (500 V range), 1000 V DC ±20 % (1000 V range) • Nominal current: ≥1 mA DC at 0.25 MΩ (250 V), 0.5 MΩ (500 V), 1 MΩ (1000 V) • Short-circuit current: 1.5 mA DC |
| Insulation Accuracy: | • 20 MΩ, 200 MΩ: ±1.5 % reading ±5 digits • 2000 MΩ (0 – 1 GΩ): ±10 % reading ±3 digits • 2000 MΩ (1 – 2 GΩ): ±3 % reading ±3 digits |
| Continuity Ranges: | • 20 Ω (0 – 19.99 Ω) 200 Ω (0 – 199.9 Ω) 2000 Ω (0 – 1999 Ω) • Open-circuit voltage: 7 – 12 V • Measuring current: ≥200 mA at 0.2 Ω • Accuracy: ±1.5 % reading ±5 digits (20 Ω) ±1.5 % reading ±3 digits (200 Ω & 2000 Ω) |
| AC Voltage Indication: | 0 – 600 V AC ±5 % reading ±3 digits |
| Typical Number of Measurements: | • Insulation: ≥1000 tests at 0.5 MΩ load (batteries ≥8 V) • Continuity: ≥700 tests at 1 Ω load |
| Operating Uncertainty (IEC 61557-2,-4): | • 1000 V, 20 MΩ (0.50 – 19.99 MΩ): ±30 % • 1000 V, 200 MΩ (1 – 199.9 MΩ); 2000 MΩ (10 – 1000 MΩ) • 500 V, 20 MΩ (0.50 – 19.99 MΩ); 200 MΩ (1 – 199.9 MΩ); 2000 MΩ (10 – 100 MΩ) • 250 V, 20 MΩ (0.25 – 19.99 MΩ); 200 MΩ (1 – 199.9 MΩ); 2000 MΩ (10 – 100 MΩ) • Continuity: 20 Ω (0.20 – 19.99 Ω), 200 Ω (1 – 199.9 Ω), 2000 Ω (10 – 1999 Ω) |
| Standards & Certifications: | IEC 61010-1; IEC 61010-2-030 CAT III 300 V, Pollution Degree 2; IEC 61010-031; IEC 61557-1,2,4,10; IEC 61326-2-2 EMC; IEC 60529 (IP54 dust & drip proof); IEC 50581 (RoHS compliant) |
| Display: | • LCD (Max count 1999) with unit indicators • 30-segment bar graph (20 segments on Ω range) • “OL” for over-range indication • “NULL” symbol during auto-null operation |
| Sample Rate: | 0.5 to 2.5 readings per second |
| Operating Temperature & Humidity: | 0 °C to +40 °C; up to 85 % RH |
| Storage Temperature & Humidity: | –20 °C to +60 °C; up to 75 % RH |
| Altitude (Use Location): | ≤2000 m |
| Insulation & Withstand Voltage: | • Insulation: ≥50 MΩ at 1000 V DC (between circuitry and housing) • Withstand: 3470 V AC for 5 seconds (between circuitry and housing) |
| Overload Protection: | • Insulation: 250 V range → 300 V DC for 10 s 500 V range → 600 V DC for 10 s 1000 V range → 1200 V DC for 10 s • Continuity (20/200/2000 Ω ranges): 440 V AC for 1 minute (fused protection) |
| Dimensions (L × W × D): | 185 × 167 × 89 mm |
| Weight: | • 3005A: ≈970 g (with batteries) |
| Power Source: | 8 × R6P (AA) 1.5 V batteries (or equivalent) |
| Auto-Power-Off: | Automatically turns off ≈10 minutes after last switch operation Standby current 75 µA |
| Operating System: | Dual integration microprocessor control |
Applications:
- Measuring insulation resistance in electrical installations.
- Conducting continuity tests on wiring systems.
- Detecting AC voltage presence in circuits.
- Ensuring safety and compliance in electrical maintenance.
Package Contents:
- 1x Test Probe MODEL 7122B
- 1x Strap belt
- 1x Test probe pouch
- 8x Batteries (R6P AA)
- 1x Instruction manual
- 1x Spare fuse F600 V/500 mA
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