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Chapter 15 Specifications
15.1 Input
Item
Input circuit type
Resistive voltage divider
Rated inputs (range rms)
15/30/60/150/300/600V
Input impedance
Input resistance approx.2MΩ, Input capacitance approx.13 pF
The peak is 2.8 kV or the RMS value is 2.0 kV, whichever is less.
Instantaneous maximum allowable
input for 20 ms, 1 cycle
The peak is 2.0 kV or the RMS value is 1.5 kV, whichever is less.
Instantaneous maximum allowable
input for 1 s
Continuous maximum allowable input
The peak is 1.5 kV or the RMS value is 1.0 kV, whichever is less.
Continuous maximum common mode
voltage (at 50/60 Hz)
50/60 Hz, better than -80 dB ( ±0.01% of range maximum)
Common mode rejection ratio at 600
Vrms between input terminals and case
Voltage input terminals : short, Current input terminals : open
Reference value: 50 kHz max. ±{(maximum range rating)/(range rating) × 0.001 × f% of range} or less; 0.01% or more; the unit f: kHz
Input terminals
Binding posts
A/D conversion
Simultaneous sampling of voltage and current inputs; Resolution: 12 bits; Maximum conversion rate: approx. 22µs (approx. 45 kHz)
Range switching
Range can be selected manually, automatically or by communication control.
Automatic range switching
Range up: 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
Measurement mode switching
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
15.2 Measurement Functions
Item
Method
Frequency range
Crest factor
Display accuracy
DC :
Accuracy (within 3 months after calibration)
10Hz ≤ f < 45Hz :
(Conditions)
45Hz ≤ f ≤ 66Hz :
Temperature: 23 ±5°C
66Hz < f ≤ 1kHz :
Humidity: 30% to 75% R.H.
1kHz < f ≤ 10kHz :
Supply voltage: Specified Voltage ±5%
Input waveform: Sine wave
10kHz < f ≤ 20kHz :
Common mode voltage: 0 V DC
Filter: ON at 200 Hz or less
Scaling: OFF
Reference value
This accuracy are guaranteed by
20kHz < f ≤ 50kHz :
YOKOGAWA calibration system.
* DC: ±0.2% of range is added if the 0.5/1 A range is selected.
Note: The unit f in accuracy expressions is kHz.
Effect of power factor
Note: The ϕ is the phase angle between the
voltage and current, and the f is frequency.
Effective input range
With the input range at 10% to 110%, the above specified accuracy is valid. With the input range at 110% to 130%, the above specified reading
accuracy increased 0.5 times is added to the accuracy.
Accuracy (within 12 months after calibration)
The above specified reading accuracy increased 0.5 times is added to the accuracy (within 3 months after calibration).
±0.03% of range/°C at 5 to 18°C, 28 to 40°C
Temperature coefficient
Display update rate
4 times/s
15.3 Frequency Measurement
Input:
V1, V2, V3, A1, A2, A3
Operating principle:
Reciprocal counting method
Frequency ranges:
10 Hz to 50 kHz
±(0.1% of rdg + 1 digit)
Accuracy:
Minimum input is more than 30% of rated range.
When an input frequency is less than 200Hz, FILTER must be
ON to obtain the specification accuracy.
Minimum input frequency is more than 20% of frequency
measurement range.
IM 253401-01E
Voltage (V)
Floating input
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
Voltage/current
Digital sampling method, summation averaging method
DC, 10 Hz to 50 kHz
"3" at rated input
±(0.2 % of rdg + 0.2% of rng)*
±(0.3% of rdg + 0.2% of rng)
±(0.15% of rdg + 0.1% of rng)
±(0.3% of rdg + 0.2% of rng)
±(0.2% of rdg + 0.3% of rng)
±{(0.05 × f)% of rdg}
±(0.5% of rdg + 0.5% of rng)
±[{0.15 × (f-10)}% of rdg]
±(0.5% of rdg + 0.5% of rng)
±[{0.15 × (f-10)}% of rdg]
15.4 Communication
Communication Specifications (GP-IB & RS-232-C)
GP-IB:
RS-232-C:
Current (A)
Shunt input
Direct input: 0.5/1/2/5/10/20 A
External input (optional): 2.5/5/10 V or 50/100/200 mV
Direct input: approx. 6 mΩ + approx. 0.1 µH
External input: 2.5/5/10 V - approx. 100 kΩ; 50/100/200 mV - approx. 20 k Ω
The peak is 450 A or the RMS value is 300 A, whichever is less.
External input: Peak value is 10 times the range or less.
The peak is 150 A or the RMS value is 40 A, whichever is less.
External input: Peak value is 10 times the range or less.
The peak is 100 A or the RMS value is 30 A, whichever is less.
External input: Peak value is 5 times the range or less.
Direct input: Large binding posts, External input: Safety terminals
Effective power
±(0.3% of rdg + 0.3% of rng)*
DC :
10Hz ≤ f < 45Hz :
±(0.5% of rdg + 0.3% of rng)
45Hz ≤ f ≤ 66Hz :
±(0.25% of rdg + 0.1% of rng)
66Hz < f ≤ 1kHz :
±(0.5% of rdg + 0.3% of rng)
1kHz < f ≤ 10kHz :
±(0.3% of rdg + 0.5% of rng)
±{(0.08 × f)% of rdg}
10kHz < f ≤ 20kHz :
±(0.8% of rdg + 0.8% of rng)
±[{0.19 × (f-10)}% of rdg]
Reference value
20kHz < f ≤ 50kHz :
±(0.8% of rdg + 0.8 % of rng)
±[{0.25 × (f-10)}% of rdg]
* DC: ±0.2% of range is added if the 0.5/1 A range is selected.
cosϕ = 0
45 Hz ≤ f ≤ 66 Hz:add ±0.25% of range
Reference data (up to 50kHz): add ±{(0.23 + 0.4 × fkHz)% of range}
1 > cosϕ > 0
add the product of tanϕ and the effect on cosϕ = 0.
Electrical specifications:
IEEE St'd 488.2-1987
Mechanical specifications: IEEE St'd 488.2-1987
Interface function:
SH1, AH1, T5, L4, SR1, RL1, PP0,
DC1,DT1, C0
Transmission mode: Start stop synchronization
Baud rate: 75, 150, 300, 600, 1200, 2400, 4800, 9600 bps
15
15-1
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