The KEW 3121A/3122A/3123A battery‑powered high‑voltage insulation resistance tester user manual provides safety warnings, specifications, operation steps…
This manual describes the KEW 3121A, 3122A and 3123A portable high‑voltage insulation resistance testers. It begins with safety warnings that must be read before any measurement, including keeping the device off‑line, avoiding open battery covers while powered, and not testing in flammable environments.
The document then details the instrument’s features, technical specifications, layout of controls, step‑by‑step operating procedures, battery replacement, how to secure the instrument in its hard case, and cleaning recommendations. Accessories such as the carrying case, test leads, grounding and protection wires, and optional probes are also listed. This manual is written in Chinese.
| Rated voltage | 2500 V (3121A), 5000 V (3122A), 10000 V (3123A) |
|---|---|
| Accuracy | ±5 % (100‑50000 MΩ) within specified ranges |
| Operating temperature | -10 °C to +40 °C |
| Dimensions | 200 mm × 140 mm × 80 mm |
The KEW 3121A is rated at 2500 V, the 3122A at 5000 V, and the 3123A at 10000 V.
Set the function switch to BATT.CHECK and press the test switch; if the pointer stays in the BATT.GOOD area, the battery is good.