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5.2
Measuring/Displaying Frequency
Relevant Keys
Operating Procedure
Display
C
Explanation
IM 253401-01E
A
hour
min
SAMPLE
V OVER
A OVER
MODE
B
RMS
V MEAN
DC
C
hour
min
sec
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 V Hz (voltage frequency) or A Hz (current frequency) by pressing the
FUNCTION key of display C.
FUNCTION
FUNCTION
V
A
FUNCTION
*1
&A
FUNCTION
FUNCTION
*1
&V
Wh± and Ah± will light twice.
and
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.
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.
m
V
VA
1
2
3
AUTO
var
k
A
V RANGE A RANGE
FUNCTION
ELEMENT
MODE
M W
TIME
m
V
PF
1
2
3
k
A
deg
FUNCTION
ELEMENT
M W
%
START
HARMONICS MEMORY
REMOTE
m
V
Hz
1
2
3
LOCAL
h
k
A
FUNCTION
ELEMENT
INTERFACE
M W
h
1Φ3W
RECALL
HARMONICS
3Φ4W
FUNCTION
FUNCTION
SHIFT
SHIFT
FUNCTION
FUNCTION
W
V Hz
FUNCTION
FUNCTION
*1
Ah±
are displayed on the top of display C.
AUTO
Displays
HOLD
relevant
TRIG
keys and
ENTER
indicator
INTEGRATOR
STOP
RESET
INTEG SET
SETUP
OUTPUT
SHIFT
3Φ3W
WIRING
3V3A
FUNCTION
SHIFT
FUNCTION
FUNCTION
A Hz
Wh
Wh±
FUNCTION
Wh±
FUNCTION
FUNCTION
Ah±
Ah
5-3
5
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