Hioki MR8905 Analog Unit

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1000V High-voltage Direct Input Module for Memory Recorders

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Hioki MR8905 Analog Unit

FunctionsNo. of channels: 2, switchable between instantaneous value and AC RMS value
Input connectorsBanana connector (input impedance 4 MΩ, input capacitance less than 1 pF)Max. rated voltage to earth: CAT II 1000 V AC & DC, CAT III 600 V AC & DC (with input isolated from the main unit, the max. voltage that can be applied between input channel and chassis and between input channels without damage)
Measurement range500 mV to 50 V/div, 7 ranges, full scale: 20 div*The maximum displayable AC voltage is 700 Vrms when using 1/2 compression of the vertical axis.
Low-pass filter5/50/500/5 kHz, OFF
Resolution1/1250 of measurement range (using 16-bit A/D converter)
Highest sampling rate500 kS/s (simultaneous sampling across 2 channels)
Accuracy±0.5% f.s. (with 5 Hz filter ON)
RMS measurementRMS accuracy: ±1.5% f.s. (30 Hz up to but not including 1 kHz, sine wave input) or ±3% f.s. (1 kHz up to 10 kHz, sine wave input)Response time: 300 ms (filter off, rising from 0% to 90% f.s.) or 600 ms (filter off, falling from 100% to 10% f.s.)Crest factor 2
Frequency characteristicsDC to 100 kHz -3 dB
Input couplingDC/AC-RMS/GND
Max. allowable input1000 V DC, 700 V AC (the max. voltage that can be applied across input pins without damage)
Dimensions and mass119.5 mm (4.70 in)W × 18.8 mm (0.74 in)H × 151.5mm (5.96 in)D, 185 g (6.5 oz)