The KYORITSU KEW 3128 is a microprocessor-controlled, high-voltage digital insulation resistance tester designed for comprehensive insulation diagnostics. It supports six test voltage ranges from 500 V up to 12 kV, enabling measurements of insulation resistance up to 35 T. Its large graphical display with bar graph and backlight visualizes insulation resistance and leakage current trends, facilitating rapid assessment of insulation health. Built-in rechargeable lead-acid battery and AC power supply allow uninterrupted operation in laboratory or field settings.
The instrument offers advanced diagnostic tests including IR (basic insulation resistance), PI (Polarization Index), DAR (Dielectric Absorption Ratio), DD (Dielectric Discharge), and SV (Step Voltage), automatically calculating indices and displaying results. During insulation tests, leakage current and capacitance are measured and shown. A filter function mitigates reading fluctuations on unstable high-resistance measurements. Real-time or logged data (up to 90 minutes at 1-second intervals) can be saved in internal memory (approx. 43,000 data points) and transferred to PC via USB for analysis. Live-circuit warning, auto-discharge with voltage monitoring, and robust IP64-rated enclosure enhance safety and reliability.
Ergonomic layout with protective fingerguards, fine voltage adjustment, and large 5.7-inch display simplify operation even in dim or outdoor conditions. Automatic discharge after tests, audible/visual live-circuit warnings, and compliance with IEC 61010-1 CAT IV 600 V ensure safe handling of high voltages. The dual power supply automatically switches between AC and internal battery. Robust construction with dust/drip proofing (IP64 with lid closed) and clear guidance in the manual support reliable field use.
| Parameter | Details |
|---|---|
| Test Voltages: | 500 V / 1000 V / 2500 V / 5000 V / 10000 V / 12000 V (selectable, fine adjustment within ranges) |
| Insulation Resistance: | Max 500 G at 500 V; 1.0 T at 1000 V; 2.5 T at 2500 V; 5.0 T at 5000 V; 35.0 T at 10000 V and 12000 V; accuracy 5% rdg 3 dgt for up to ~50500 G ranges, 20% rdg beyond high-T ranges; values displayed but not guaranteed above max. |
| Output Voltage Accuracy: | Monitor accuracy 10% rdg 20 V across ranges; output accuracy varies by range (e.g., 0+20% at lower ranges, 5+5% at highest) |
| Short-Circuit Current: | Max 5 mA across high-voltage ranges; rated output current 1 mA or more within specified load resistances |
| Leakage & Capacitance: | Leakage current display 5.0 nA to ~2.40 mA; capacitance measurement 5.0 nF50 F (5005000 V), 40 nF1 F (10000/12000 V); accuracy 5% rdg 5 dgt |
| Voltage Measurement: | DC/AC 30600 V; accuracy 2% rdg 3 dgt; frequency 4565 Hz, 0.2 Hz |
| Display: | 5.7-inch (320240) monochrome LCD with backlight; bar graph (36 points); overrange OL for resistance, Hi for voltage; low-battery indicator |
| Diagnostic Tests: | PI, DAR, DD, SV with user-selectable intervals/time; automatic calculation and display of indices |
| Auto-Discharge & Monitor: | Yes; discharges capacitive charge after test; voltage monitor 306000 V resolution 10 V confirms discharge |
| Filter Functions: | Three modes (low-pass, moving average, combined) to stabilize readings |
| Memory & Communication: | Internal memory: up to ~43,000 data in 32 files; print-screen to BMP; USB adapter (MODEL 8212-USB) for PC transfer; PC software support |
| Power Source: | Rechargeable lead storage battery (12 V, 5 Ah) with built-in charger; AC power 100240 V auto-switching; continuous operation approx. 4 hours under load at 12 kV; charge time ~8 h |
| Safety Standards: | IEC 61010-1 CAT IV 600 V / CAT III 600 V; IEC 61010-2-030; IEC 61010-031; IEC 61326; IEC 60529 IP64 (lid closed); pollution degree 2; overload protection AC720 V/10 s; withstand voltages per section |
| Operating Conditions: | Temperature: 040 C (battery), 1050 C (AC); humidity 85% RH (no condensation); altitude 2000 m |
| Storage Conditions: | 2060 C; humidity 75% RH (no condensation) |
| Dimensions & Weight: | Instrument + hard case: 330 410 180 mm; weight approx. 9 kg including battery and case |
| Protection & Design: | IP64 dust/drip proof (lid closed); protective fingerguards; ergonomic layout; robust for field use |
IM_3128_92-1997J_E_L
LC_3128_2_0_A4_Low_en_P
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