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DISCONTINUED ITEM-Replacement Model: Hioki ST5520 Insulation Tester
One unit provides six selectable test voltages: 25, 50, 100, 250, 500 and 1000 V, to support a wide variety of tests to evaluate electrical and electronic components and equipment. Comparator and timer functions facilitate easy insulation resistance testing in accordance with various safety standards, and a complete external I/O interface is provided for efficient automated line testing.
| Measurement Items | Insulation resistance (Applied DC voltage method) |
| Testing Voltage/ Measurement Ranges (Auto/ Manual) | 25/ 50V: 2.000/20.00/200.0 MΩ, 100/ 250/ 500/ 1000V: 2.000/ 20.00/ 200.0/ 2000MΩ (at 500 or 1000V testing, up to 4000MΩ) |
| Basic Accuracy | ±2% rdg. ±5 dgt.: at 25/ 50/ 100V [0 to 20MΩ], 250V [0 to 100MΩ], 500/ 1000V [0 to 999MΩ] |
| Measurement Speed | Fast: 10 times/s, Slow:1 time/s, selectable, Response times: less than 0.5 second |
| Display | LED |
| Internal Memory | Testing voltage, Limit level value of comparator , Testing mode, Beep sound of decision, Testing time, Delay time, Resistance range, Measurement speed Number of memory: Max. 10 (External control to save or load) |
| Comparator Setting | Key press: Select lower limit value from designated options RS-232C: Set optional lower limit value within measurement range |
| Judgment Process | PASS: Measurement value ≥ lower limit, FAIL: Measurement value < lower limit, Beep sound, PASS/FAIL display, signal output to external I/O |
| Test Duration Timer | After measurement START is initiated and waiting time (0.35s max.) + designated test duration elapses. Test duration: 0.5 to 99 s |
| Delay Time Timer | After measurement START is initiated and until waiting time (0.35s max.) + designated delay time elapses. Delay time: 0.1 to 99 s |
| Analog Output | DC +4 V f.s. |
| Interface | RS-232C (Measurement value printing is possible with connect the 9442), External I/O (External control input, Judgment result) |
| Power Supply | 100 to 240 V AC, 50/60 Hz, 15 VA max. |
| Dimensions, Mass | 215mm (8.46in) W × 61mm (2.40in) H × 213mm (8.39in) D, 1.1kg (38.8oz) |
| Supplied Accessories | Power cord ×1, Instruction Manual ×1 |
