The Kyoritsu KEW 3122B is a batterypowered, analogue highvoltage insulation resistance tester designed for field and shop use. Its robust, ergonomic housing and builtin hard case protect the instrument and leads during transport, while the analogue pointer and colourcoded scales provide immediate visual feedback on insulation condition.
Autoranging between low and high resistance scales (05G / 2200G) allows the tester to maintain full output voltage (5kV5%) down to 0.2G, ensuring accurate readings even on partially deteriorated insulation. Bright LEDs indicate which range is active, complementing the analogue display for rapid judgment in bright or lowlight environments.
Weighing approximately 1.7kg (including eight Ccell batteries) and rated to CATIII600V / CATIV300V, the KEW3122B delivers up to 40hours of continuous use. Its safetycompliant design (IEC610101, 2030; IEC61010031) and optional recorder adaptor make it ideal for maintenance of cables, transformers, generators, and switchgear.
| Parameter | KEW3122B Specification |
|---|---|
| Test Voltage: | DC5000V5% |
| Measuring Ranges: | 05G/2200G (autoranging) |
| Accuracy (First Range): | 5% of indicated value (0.2100G) |
| Accuracy (Outside First Range): | 10% of indicated value or 0.5% of scale length |
| Safety Category: | CATIII600V / CATIV300V |
| Output Characteristics: | Maintains full 5kV output down to 0.2G |
| Dimensions: | 177226100mm |
| Weight: | 1.7kg (including batteries) |
| Power Source: | 8LR14 (Ccell) alkaline batteries |
| Operating Time: | Approx. 40hours (100M load at 5000V range) |
IM_3121B_3122B_92-2236_E
LC_3121B_3122B_1E
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