Atec Yokogawa-WT3000 - Manual (Page 11)

11
waveform
peak
RMS value
Crest factor
=
waveform peak
(CF, peak factor) RMS value
Crest factor (CF) =
{measuring range
ϫ
CF setting (3 or 6)}
measured value (RMS)
The crest factor is the ratio of the waveform peak value and the RMS value.
SUPPORTS Crest Factor 6
When checking the measurable crest factor of our power measuring instruments,
please refer to the following equation.
* However, the peak value of the measured signal must be less than or equal to the continuous maximum allowed input
* The crest factor on a power meter is specified by how many
times peak input value is allowed relative to rated input value.
Even if some measured signals exist whose crest factors are
larger than the specifications of the instrument (the crest
factor standard at the rated input), you can measure signals
having crest factors larger than the specifications by setting a measurement range that is large relative to the measured
signal. For example, even if you set CF = 3, CF5 or higher
measurements are possible as long as the measured value
(RMS) is 60% or less than the measuring range. Also, for a
setting of CF = 3, measurements of CF = 300 are possible with
the minimum effective input (1% of measuring range).
There are limitations on some specifications and functions. See the individual product catalogs for details.
0.02% of reading + 0.04% of range
DC, 0.1 Hz to 1 MHz
1, 2, 3, 4
15/30/60/100/150/300/600/1000[V] (when crest factor is 3)
7.5/15/30/50/75/150/300/500[V] (when crest factor is 6)
50m/100m/200m/500m/1/2/5/10[V] (when crest factor is 3)
25m/50m/100m/250m/500m/1/2.5/5[V] (when crest factor is 6)
1% to 130%
✓
✓
✓
✓ (ASSP)
✓ (user-defined function)
✓
✓
✓
2 channels (up to 8 channels with option /FQ)
✓
(/G6)(opt.)
Torque, rotating speed input (motor version)(opt.)
(/G6)(opt.)
✓ (20 functions)
600,000
999,999
99,999
8.4-inch TFT color LCD
Numerical values, waveforms, trends, bar graphs, vectors
Approximately 200 kS/s
(/G6)(opt.)
(/G6)(opt.)
(/G6)(opt.)(10cycle/50Hz, 12cycle/60Hz)
(/FL)(opt.)
(/CC)(opt.)
✓
(/DT)(opt.)
20 channels (/DA)(opt.)
✓
approximately 30MB
GP-IB; RS-232 (/C2)(opt.); USB (/C12)
VGA output (/V1)(opt.); Ethernet (/C7)(opt.)
Commands in IEEE488.2 standard
50m/100m/250m/500m/1/2/5/10/20[S]
PC card interface; USB (/C5)(opt.)
Built-in printer (front side) (/B5)(opt.)
Voltage, current, active power, reactive power, apparent power, power factor, phase angle, peak voltage, peak current, crest factor
Range
Measurement
parameters
Display
resolution
Display
Measurement/
functions
Other
features
None (communication commands vary from product to product)
WT3000
0.1% of reading + 0.05% of range
DC, 0.1 Hz ~ 1 MHz
1, 2, 3, 4, 5, 6
1.5/3/6/10/15/30/60/100/150/300/600/1000[V] (when crest factor is 3)
750m/1.5/3/5/7/5/15/30/50/75/150/300/500[V] (when crest factor is 6)
50m/100m/250m/500m/1/2.5/5/10[V] (when crest factor is 3)
25m/50m/125m/250m/500m/1.25/2.5/5[V] (when crest factor is 6)
1% to 110%
✓
✓
✓
✓
✓ (user-defined function)
✓
✓
✓
3 ch (up to 12 channels with option /FQ)
✓
✓
Torque and rotational velocity input(opt.)
✓ (20)
60,000
999,999
99,999
8.4-inch TFT color LCD (XGA)
Numerical values, waveforms, trends, bar graphs, vectors
Approximately 2 MS/s
(/G5)(opt.)
(/G6)(opt.)
(/DT)(opt.)
20 channels (/DA)(opt.)
✓
Approximately 32MB
GPIB, USB, Ethernet,
RGBOutput(V1)
Commands in IEEE488.2 standard
50m/100m/250m/500m/1/2/5/10/20[S]
᭺ USB
Built-in printer (front side)(opt.)
WT1800
(opt.):Optional
Direct input
External sensor
input
Basic power accuracy (50/60 Hz)
Measurement power bandwidth
Input elements
Voltage range
Current range
Guaranteed accuracy range for voltage and current ranges
Main measurement parameters
Peak hold (instantaneous maximum value hold)
MAX hold
Voltage RMS/MEAN simultaneous measurement
RMS/MEAN/AC/DC simultaneous measurement
Mean active power
Active power amount (WP)
Apparent power amount (WS)
Reactive power amount (WQ)
Frequency
Efficiency
Phase angle between phases (fundamental wave)
Motor evaluation
FFT spectral analysis
User-defined functions
Voltage, current, power
Power amount, current amount
Frequency
Display
Display format
Sampling frequency
Harmonic measurement
Dual Harmonic Measurement
Harmonic measurement in normal measurement mode
IEC standards-compliant harmonic measurement
Flicker measurement
Cycle by cycle measurement
Compensation function
Delta calculation function
DA output
Synchronized operation
Storage (internal memory for storing data)
Interfaces
Communication command compatibility
Communication command standards
Data updating interval
Removable storage
Printer
Select from 10m/20m/50m/100m/200m/500m/1/2/5[A]
or 1/2/5/10/20/50[A] (when crest factor is 3)
5m/10m/25m/50m/100m/250m/500m/1/2.5[A]
or 0.5/1/2.5/5/10/25[A] (when crest factor is 6)
Select from 0.5/1/2/5/10/20/30[A] or
5m/10m/20m/50m/100m/200m/500m/1/2 [A] (when crest factor is 3)
Select from 0.25/0.5/1/2.5/5/10/15[A] or
2.5/5m/10m/25m/50m/100m/250m/500m/1 [A] (when crest factor is 6)
Comparison of Specifications and Functions in WT3000, Other WT Series Models