| Measurement items | Insulation resistance (Applied DC voltage method) |
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| Testing voltage/ measurement ranges (Auto / Manual) | 25 V ≤ V < 100 V (2.000/20.00/200.0 MΩ),
100 V ≤ V < 500 V (2.000/20.00/200.0/2000 MΩ),
500 V ≤ V ≤ 1000 V (2.000/20.00/200.0/4000/9990 MΩ) |
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| Basic accuracy | ±2 % rdg. ±5 dgt.
25 V ≤ V < 100 V [0 to 20 MΩ]
100 V ≤ V < 500 V [0 to 20 MΩ]
500 V ≤ V ≤ 1000 V [0 to 200 MΩ] |
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| Measurement speed | Fast: 30 ms/time, Slow: 500 ms/time (selectable) |
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| Display | LCD (service life: 100,000 hours), 4-level backlight |
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| Internal memory | Saved items: rated measurement voltage, comparator upper limit /lower limit values, test mode, beep sound to distinguish the result, test time, response time, resistance range, measurement speed
Memory capacity: up to 10 items (can be saved/loaded) |
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| Comparator setting | UPPER_FAIL: Measured value ≥ upper limit value
PASS: Upper limit value > measured value > lower limit value
LOWER_FAIL: Measured value ≤ lower limit value |
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| Judgement process | Beep sound, PASS / U.FAIL/L. FAIL: light up on LED display, When UL_FAIL, U.FAIL / L.FAIL light up simultaneously, EXT.I/O output, judgement result can be obtained via RS-232C |
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| Test duration | Definition of test duration: Test duration = Response time + Measurement time
Function: Set the time from voltage application until pass/fail assessment
Configuration range: 0.045 s to 999.999 s (0.001 s resolution) |
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| Response time timer | After the start of the test, comparator judgment operation can be prohibited until a set interval from 0.005 sec. to 999.999 sec. (at 0.001 sec. resolution) has passed. |
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| Analog output | DC +4 V f.s. |
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| Interface | RS-232C (standard), External I/O (External control input, Judgment result)
BCD output (ST2250-01 only) |
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| Power supply | 100 to 240 V AC, 50/60 Hz, 25 VA max. |
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| Dimensions and mass | 215 mm (8.46 in)W × 80 mm (3.15 in)H × 166 mm (6.54 in)D, 1.1 kg (38.8 oz) |
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| Accessories | Instruction Manual ×1, Power cord ×1, EXT. I/O Connector ×1, Connector Cover ×1 |
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