3-Range, 250 to 1000V Analog Insulation Tester with Continuity Check
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.
CAT III 600 V
| 3490 | Bundled with standard Test Lead L9787 |
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These instruments feature a robust design that can withstand being dropped onto concrete from a height of 1 m. Difficult to damage, this insulation tester is ideal for use in the field.
The scale is lit by a white LED, ensuring that insulation resistance values are easy to read, even when using the instrument in a dim location.
You can keep track of remaining battery life since it’s shown on the LED, eliminating the need to worry about sudden loss of battery power in the field.
The instrument’s measurement switch can be operated with just the thumb. Press for a single measurement or lift up for continuous measurement of insulation resistance.
By using switch-equipped measurement leads, you can start and stop insulation resistance measurement remotely. There’s also a handy light for improved convenience when working in dim locations.
This insulation tester has voltages grouped by application with an “OFF” position between them to help keep users from inadvertently applying the wrong voltage.
| 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 |
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| 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 | |||||
