Hioki insulation testers or megohmmeters feature all-in-one designs including built-in rugged cases and test lead storage compartments. The 3490 is a 3-range, 250/500/1000V analog insulation resistance meter with efficient functions and features to help shorten work time associated with field insulation testing.
| Rated output voltage | 250 V DC | 500 V DC | 1000 V DC |
|---|---|---|---|
| Effective maximum indicated value | 100 MΩ | 100 MΩ | 4000 MΩ |
| Accuracy 1st effective measuring range |
±2 % of scale length 0.05 to 50 MΩ |
±2 % of scale length 0.05 to 50 MΩ |
±2 % of scale length 2 to 1000 MΩ |
| Lower limit resistance |
0.25 MΩ | 0.5 MΩ | 1 MΩ |
| (Measurement resistance value to maintain testing voltage) | |||
| Overload protection | 660 V AC (10 sec.) | ||
| Low resistance range |
3 Ω (at 200 mA testing current), ±0.09 Ω accuracy, 30 Ω (at 20 mA testing current), ±0.9 Ω accuracy, Open-circuit voltage: 4.1 to 6.9 V |
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| AC voltage range | 0 to 600 V (50/60 Hz), ±5 % of maximum scale value accuracy, 100 kΩ or more input resistance |
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| Other functions | Bright LED luminous scale, Drop proof (on concrete, 1 m/1 time), Battery check, Live circuit check, Auto discharge | ||
| Power supply | LR6 (AA) alkaline batteries ×4, Continuous use: 20 hours (at 500 V range, no load) | ||
| Dimensions and mass | 159 mm (6.26 in)W × 177 mm (6.97 in)H × 53 mm (2.09 in)D, 610 g (21.5 oz), (including battery, excluding test lead) | ||
| Included accessories | Test lead L9787 ×1, Instruction manual ×1, Shoulder strap ×1, LR6 (AA) alkaline batteries ×4 | ||
