IM 253401-01E
5-3
5
Measuring / Displaying V
oltage, Current,
Active Power
, Frequency
,
Four
Arithmetic Operation V
alue, Crest Factor and Peak V
alue
5.2
Measuring/Displaying Frequency
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
V
VA
m
A
k
var
M W
TIME
V
PF
m
A
k
deg
M W
%
FUNCTION
AUTO
AUTO
MODE
1
Φ
3W
V
Hz
m
A
k
h
M W
TRIG
V RANGE A RANGE
HOLD
ENTER
INTEGRATOR
START
HARMONICS
MEMORY
INTEG SET
STOP
RESET
REMOTE
INTERFACE
OUTPUT
LOCAL
SETUP
h
SHIFT
WIRING
3
Φ
4W
3
Φ
3W
3V3A
ELEMENT
1
2
3
FUNCTION
ELEMENT
1
2
3
FUNCTION
ELEMENT
1
2
3
*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 V Hz (voltage frequency) or A Hz (current frequency) by pressing the
FUNCTION key of display C.
FUNCTION
SHIFT
FUNCTION
SHIFT
FUNCTION
SHIFT
Display
C
A
W
V Hz
A Hz
Wh
Ah
Ah
±
Wh
±
Wh
±
Ah
±
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
&V
&A
*1
V
*1
*1
Wh
±
and Ah
±
will light twice. and are displayed on the top of display C.
You can reverse the order by first pressing the SHIFT key followed by the FUNCTION key.
*1
Displayed on WT110/WT130 with ROM version 2.01 or later.
2 Selecting the Input Element
Select the input element by pressing the ELEMENT key of display C. The operation is the
same as the one described on page 5-1.
Explanation
Measurement Range
The measurement range lies from 10 to 50kHz. Depending on the internal timing, however,
measurements can be done in the range from 4 to 10Hz. At 100Hz/1kHz/10kHz/100kHz, the
measurement range is auto range.
Maximum Reading of the Display and Units
• Maximum reading
:
9999
• Units
:
Hz
• Prefix
:
k
Selecting the Display Function
The following selections are available.
• V Hz: voltage frequency will be displayed
• A Hz: current frequency 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
•
∑
: Displays no measurement values, only dots.
Note
• In case the level of the input signal is low (below approx. 7%), or when the frequency is smaller than the
measurement range, the display will show “ErrLo”. When the frequency is larger than the measurement
range, the display will show “ErrHi”.
• This instrument measures the frequency after synchronizing to the cycle of the input signal. We
recommend to turn ON the filter when measuring an inverted waveform or a waveform with high noise.
However, depending on the signal’s frequency and level, “ErrLo” might appear on the display. Since the
filter’s cutoff frequency is 300Hz, the signal attenuates and no signal will be detected.
• Even when the filter is set OFF but the frequency exceeds the measurement range, “ErrLo” might appear
since no signal will be detected anymore due to the internal circuit’s attenuation.
