YOKOGAWA WT110 User Manual

IM 253401-01E
6-1
6
Computing / Displaying Apparent Power, Reactive Power, Power Factor and Phase Angle
6.1 Computing / Displaying Apparent Power,
Reactive Power and Power Factor
Relevant Keys
SCALING
AVG FILTER
STORE
RECALL
HARMONICS
SAMPLE
V OVER
A OVER
MODE
RMS
V MEAN
DC
A
B
C
hour
hour
min
min sec
VVA
m
Ak
var
MW
TIME
VPF
m
Ak
deg
MW
%
FUNCTION
AUTO AUTO
MODE
1Φ3W
VHz
m
Ak
h
MW
TRIG
V RANGE A RANGE HOLD
ENTER
INTEGRATOR
START
HARMONICS MEMORY INTEG SET
STOP RESET
REMOTE
INTERFACE OUTPUT
LOCAL
SETUP
h
SHIFT
WIRING
3Φ3W
3Φ4W
3V3A
ELEMENT
123
FUNCTION ELEMENT
123
FUNCTION ELEMENT
123
*Shows the operation panel of the WT130. For the differences
between WT110 and WT130, refer to section 2.2, page 2-2, 2-3
Displays
relevant
keys and
indicator
Operating Procedure
1 Selecting the Display Function
Select either VA (apparant power), var (reactive power) or PF (power factor) by pressing the
FUNCTION key of display A or B.
Display
A
B
FUNCTION
VAW
VA var
TIME
VAW
PF
deg
FUNCTION FUNCTION FUNCTION FUNCTION
FUNCTION FUNCTION FUNCTION
FUNCTION
FUNCTION
FUNCTION
You can reverse the order by first pressing the SHIFT key followed by the FUNCTION key.
2 Selecting the Input Element
Select the input element by pressing the ELEMENT key of display A or B. The operation is
the same as the one described on page 5-1.
Explanation
Maximum Reading of the Display and Units
• Maximum reading of apparent and reactive power: 9999
• Display range of power factor : –1.000 to 1.000
(when the computed result lies between 1.001 and 2.000, 1.000 will be displayed. When the
result is 2.001 or more, PFErr will be displayed.)
• Units : VA (apparent power), var (reactive power), power factor (no unit)
• Prefix : m, k, M,
Selecting the Display Function
The following selections are available.
• VA : apparent power will be displayed
• var : reactive power will be displayed
• PF : power factor will be displayed
Selecting the Input Element
The type of input element which can be selected depends on the model number. Make your
selection after having verified your model number.
• 1/2/3: Displays the measurement values of element 1/2/3
• ∑ : Refer to page 5-2.
Note
• Changing the measurement mode might result in different computed results, even when the input signal
is the same. For more details on the measurement mode, refer to page 4-1.
• When either the voltage or current drops below 0.5% of the measurement range, PFErr will be displayed.

YOKOGAWA WT110 Specifications

General

Brand	YOKOGAWA
Model	WT110
Category	Measuring Instruments
Language	English