YOKOGAWA WT200 User Manual page 231

16.1 Input
Current
Item
Input circuit type
Rated inputs (range rms)
Input impedance
Instantaneous maximum
allowable input for 20 ms,
1 cycle
Instantaneous maximum
allowable input for 1 s
Continuous maximum
allowable input
Continuous maximum
common mode voltage
(at 50/60 Hz)
Common mode rejection
ratio at 600 Vrms between Current input terminals : open
input terminals and case
Input terminals
A/D conversion
Range switching
Automatic range switching Range up:
Measurement mode
switching
16-2
Specification
Floating input
Shunt input
Direct input: 20 A, 10 A, 5 A, 2 A, 1 A, 0.5 A, 200 mA, 100 mA, 50 mA, 20 mA, 10 mA, 5 mA
External sensor input (optional): (10 V, 5 V, 2.5 V), or (200 mV, 100 mV, 50 mV)
Direct input: Approx. 6 mΩ + approx. 0.1 µH in the 20 A to 0.5 A range. Approx. 500 mΩ in the 200
mA to 5 mA range.
External sensor input: 2.5/5/10 V - approx. 100 kΩ; 50/100/200 mV - approx. 20 kΩ
20 A to 0.5 A range: Peak current of 450 A or RMS value of 300 A, whichever is less.
200 mA to 5 mA range: Peak current of 150 A or RMS value of 100 A, whichever is less.
External sensor input: Peak value is 10 times the range or less.
20 A to 0.5 A range: Peak current of 150 A or RMS value of 40 A, whichever is less.
200 mA to 5 mA range: Peak current of 30 A or RMS value of 20 A, whichever is less.
External sensor input: Peak value is 10 times the range or less.
20 A to 0.5 A range: Peak current of 100 A or RMS value of 25 A, whichever is less.
200 mA to 5 mA range: Peak current of 30 A or RMS value of 20 A, whichever is less.
External sensor input: Peak value is 5 times the range or less.
600 Vrms (when the protective cover for the output connector is used) CAT II,
400 Vrms (when the protective cover for the output connector is removed) CAT II
50/60 Hz, better than -80 dB (±0.01% of range maximum)
Reference value: 50 kHz max.
Maximum range rating
±
Range rating
Maximum range rating
±
Range rating
; 0.01% or more; the unit f: kHz
Direct input: Large binding posts, External sensor input: Safety terminals
Simultaneous sampling of voltage and current inputs; Resolution: 12 bits; Maximum conversion rate:
approx. 26 µs (approx. 38 kHz)
Range can be selected manually, automatically or by communication control.
When the measured value exceeds 110% of the rated range or the peak value
exceeds approximately 300% of the rated range
Range down: When the measured value becomes less than 30% of the rated range and the peak
value is less than approximately 300% of the subordinate range
The following modes can be set manually or by communication control:
RMS: True RMS measurement for both voltage and current; V MEAN: Rectified Mean Calibrated to
an RMS sine wave measurement for voltage, and true RMS measurement for current; DC: Mean
value measurement for voltage and current
× 0.001 × f% of rng
(other than the 200 mA to 5 mA range)
× 0.0002 × f% of rng
(200 mA to 5 mA range)
IM 253421-01E