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6.1
Computing / Displaying Apparent Power,
Reactive Power and Power Factor
Relevant Keys
Operating Procedure
Display
A
B
Explanation
IM 253401-01E
A
hour
min
SAMPLE
V OVER
A OVER
MODE
B
RMS
V MEAN
DC
hour
min
sec
C
SCALING
AVG
FILTER
STORE
*Shows the operation panel of the WT130. For the differences
between WT110 and WT130, refer to section 2.2, page 2-2, 2-3
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.
FUNCTION
FUNCTION
V
A
FUNCTION
FUNCTION
V
A
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.
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.
m
V
VA
1
2
3
AUTO
AUTO
var
V RANGE A RANGE
k
A
FUNCTION
ELEMENT
MODE
M W
TIME
m
V
PF
1
2
3
k
A
deg
FUNCTION
ELEMENT
M W
%
START
STOP
HARMONICS MEMORY
REMOTE
m
V
Hz
1
2
3
LOCAL
SETUP
h
k
A
FUNCTION
ELEMENT
INTERFACE
OUTPUT
M W
h
1Φ3W
3Φ3W
RECALL
HARMONICS
3Φ4W
3V3A
FUNCTION
FUNCTION
W
VA
var
FUNCTION
FUNCTION
W
PF
deg
Displays
HOLD
relevant
TRIG
keys and
ENTER
indicator
INTEGRATOR
RESET
INTEG SET
SHIFT
WIRING
FUNCTION
FUNCTION
TIME
FUNCTION
6-1
6
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