Hioki 8835-01 - Page 354

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15.2 Analog Inputs
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Frequency measurement
ranges
0.1, 0.2, 1, 2, 10, 20, 100, 200 Hz/DIV, 1, 2, 10 kHz/DIV
10, 20, 100, 200, 1k r/min/DIV
Power source frequency ranges: 50 Hz (40 to 60 Hz), 60 Hz (50 to 70 Hz)
Frequency measurement
accuracy
±0.7% f.s. (100 kHz f.s. range)
±0.2% f.s. (other than above)
±0.032 Hz (power source frequency ranges)
Frequency hold ON, OFF (waiting time: 10 ms, 1 s variable)
When hold is OFF, the current measurement value is halved if the next
measurement value is not fixed within the waiting time.
Count measurement ranges 10, 20, 100, 200 counts/DIV, 1, 2, 10, 20, 100, 200 k counts/DIV,
1 M counts/DIV
Pulse duty ratio
measurement ranges
100% f.s.
Pulse duty ratio accuracy ±1% (10 Hz to 10 kHz)
Threshold value (common) -10 to +10 V variable (0.2 V steps)
Frequency measurement
ranges (common)
DC to 100 kHz (frequency)
DC to 90 kHz (count)
10 Hz to 10 kHz (pulse duty ratio)
Response time (common) 10 μs max. (frequency of 300 Hz or greater, count)
50 μs max. (frequency of 300 Hz or less, pulse duty ratio)
The sampling period of the MEMORY HiCORDER in which the 8940 is
installed must be added to the above.
Voltage measurement ranges 1, 2, 5, 10, 20, 50, 100, 200, 500 mV/DIV, 1, 2, 5 V/DIV
Current measurement ranges With the 9270, 9272 (20 A), 9277, 3273 and 3273-50
10, 20, 50 100, 200, 500 mA, 1, 2, 5 10 A/DIV
With the 9271, 9272 (200 A) and 9278
100, 200, 500 mA, 1, 2, 5 10, 20, 50, 100 A/DIV
With the 9279
200*
1
, 500 mA, 1, 2*
1
, 5 10, 20*
1
, 50, 100, 200*
1
A/DIV
Frequency characteristic*
2
DC to 400 kHz ±3 dB (DC coupling) (When using a sensor, same as the
sensor.)
DC amplitude accuracy*
2
±0.4% f.s. (Using the 9279 ±0.5 %f.s.)
Zero position accuracy*
2
±0.15% f.s. (Using the9279 ±0.2 %f.s.)
Temperature characteristic*
2
Gain: ±0.025%f.s./℃
Zero position: ±0.04%f.s./℃ (1, 2, 5 mV/DIV ranges)
±0.03%f.s./℃ (other than above)
Common mode rejection ratio 80 dB minimum (at 50/60 Hz and with signal source resistance
100 Ω maximum)
Noise 150 μVp-p max. (1 mV/DIV range)
Frequency, count and pulse duty ratio measurement
Voltage and current measurement
*
1
: Vertical resolution: 128 LSB/DIV
*
2
: When measuring current, the accuracy and characteristics of the sensor or probe must be added to
the above.