Atec Yokogawa-WT3000 - Manual (Page 3)

3
Yokogawa’s highest-precision power meter *2
The WT3000 has the highest precision of the Yokogawa power
meters in the WT Series. The models in the WT Series are
designed to meet a wide variety of user needs. The WT300
Series is a high price-performance series which is very popular
in production line applications. The WT1800 allows
measurement data to be viewed in a variety of ways, including
numerical value display, waveform display, and trend display
capabilities.
WT3000
± 0.02%
WT1800
± 0.10%
WT300
± 0.10%
*reading error
3
Better Efficiency in Power Measurements
In developing the WT3000, Yokogawa focused on improving
efficiency in two basic areas. One goal was to obtain highly
precise and simultaneous measurements of the power
conversion efficiency of a piece of equipment. The other
objective was to improve equipment evaluation efficiency by
making simultaneous power evaluations and tests easier
and faster.
New Innovations to Enhance the Reliable
Measurement Technology
With the WT3000, we made further improvements to the
basic performance specifications for even better functionality
and reliability. We are confident users will appreciate these
improvements to power and efficiency measurements
thanks to the new power control technologies we have
introduced.
A Variety of External Interface Choices
The WT3000 equips with a PC card
slot (ATA flash card slot). The
WT3000 is also standard-equipped
with a GP-IB port. In addition, a
serial (RS-232) port, Ethernet port,
USB port for peripheral, and USB
port for connection to PC are
available as options. The variety of
interface choices allows customers to
use the best interfaces for a wide
variety of equipment, media, and
network environments.
Select the model
most suited to your
measurement needs.
ଙ
High Accuracy and Wide Frequency Range
Basic Power Accuracy
± (0.02% of reading + 0.04% of range)
Frequency Range
DC, 0.1 Hz to 1 MHz
ଙ
Low Power Factor Error
Power factor influence when cosø=0
0.03% of S
S is reading value of apparent power
ø is phase angle between voltage and current
ଙ
Current Range
Direct Input
0.5/1/2/5/10/20/30 [A] *
5m/10m/20m/50m/100m/200m/500m/1/2 [A] *
External Input
50m/100m/200m/500m/1/2/5/10 [V] *
ଙ
Voltage Range
15/30/60/100/150/300/600/1000 [V] *
* Voltage range and current range are for crest factor 3
ଙ
Continuous Maximum Common Mode
Voltage (50/60 Hz)
1000 [Vrms]
ଙ
Data Update rate: 50 ms to 20 sec
ଙ
Effective input range: 1% to 130%
ଙ
Simultaneous measurement with 2 Units
ଙ
Standard PC Card Slot
ଙ
Storage Function (Approximately 30MB
internal memory)
Motor Version
Standard Version
*1 As of July, 2013, for power accuracy in a three-phase power meter
(as investigated by Yokogawa)
*2 As compared to Yokogawa’s products
In addition to the functions of the standard version, the
models offer powerful motor/inverter evaluation
functions.
ଙ
Motor Efficiency and Total Efficiency
Measurement
Analog or pulse signal from
rotating sensor and torque
meter can be input, and
allows calculation of torque,
revolution speed,
mechanical power,
synchronous speed, slip,
motor efficiency, and total
efficiency in a single unit.